diff --git a/CLAUDE.md b/CLAUDE.md
index b1f8a294ed..e1ac653338 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -2,7 +2,7 @@
Paseo is a mobile app for monitoring and controlling your local AI coding agents from anywhere. Your dev environment, in your pocket. Connects directly to your actual development environment — your code stays on your machine.
-**Supported agents:** Claude Code, Codex, GitHub Copilot, OpenCode, and Pi.
+**Supported agents:** Claude Code, Codex, GitHub Copilot, OpenCode, Pi, Antigravity, and Muse Code.
## Repository map
diff --git a/README.md b/README.md
index 120672746b..aa0a841e7e 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@
-One interface for Claude Code, Codex, Copilot, OpenCode, and Pi agents.
+One interface for Claude Code, Codex, Copilot, OpenCode, Pi, Antigravity, and Muse Code agents.
/` and ship with the daemon. Add a directory and one ID to
-`builtinPlugins` in `packages/server/src/server/plugins/builtin/index.ts`. The workspace, build
-copy, and CI checks cover every listed directory; unlisted directories do not load. Built-ins run
-in process, ignore `pluginsEnabled`, and do not appear in `config.json` or the installed plugin
-list. Their client bundles appear in the plugin catalog. Editing one in development requires a
-daemon restart. Directory, Git, and npm installs cannot use a built-in ID.
+Built-in plugins ship from `plugins//`, with `paseo-plugin.json`, `index.server.ts`,
+`server/`, and optional client entry and icon. Add the plugin ID to `builtinPlugins` in
+`packages/server/src/server/plugins/builtin/index.ts`; the workspace, build copy, and CI
+checks cover that registry. Unlisted directories do not load.
+
+Built-ins run in process and remain active independently of `pluginsEnabled`. They are
+absent from the installed plugin list and source configuration; their client bundles
+appear in the plugin catalog. Editing one in development requires a daemon restart.
+Directory, Git, and npm installs cannot use a built-in ID.
+
+Provider plugins use separate installation and provider IDs. `muse-provider` registers the
+selectable `muse` provider (Muse Code) and a usage source. Its `status({ launch })` reports
+availability and a diagnostic after the daemon resolves the executable. Configure command,
+environment, or enablement overrides under `agents.providers.muse`. Omit `extends` to keep
+the bundled integration; an entry with `extends` shadows it with a custom provider. See
+[provider contributions](#contribute-a-provider) for the contract and
+[Muse Code](../public-docs/muse-code.md) for setup, settings, and version limitations.
## Install a Git source
diff --git a/docs/providers.md b/docs/providers.md
index d44a886674..917c2512d1 100644
--- a/docs/providers.md
+++ b/docs/providers.md
@@ -6,7 +6,7 @@ server integrations.
## Plugin providers
Keep a bundled provider in `plugins//` and register it through
-`@getpaseo/plugin/server/provider`. Antigravity follows this pattern. Built-in loading and SDK
+`@getpaseo/plugin/server/provider`. Antigravity and Muse Code follow this pattern. Built-in loading and SDK
import rules belong to [plugins.md](plugins.md#built-in-plugins); the
[public provider guide](../public-docs/plugins/providers.md) covers the provider contract.
@@ -15,8 +15,10 @@ executable resolution and applies `agents.providers..command` and `
connecting. Register the provider's icon with the plugin rather than adding it to the app's
provider icon map. You do not need a core manifest entry or provider factory.
-For Antigravity installation, modes, and limitations, see
-[Supported providers](../public-docs/supported-providers.md#antigravity).
+| Provider | Transport | Setup and limitations |
+| ----------- | ------------------------------------------ | ---------------------------------------------------------------- |
+| Antigravity | Installed `agy` CLI | [Antigravity](../public-docs/supported-providers.md#antigravity) |
+| Muse Code | MSP over one `muse serve` host per session | [Muse Code](../public-docs/muse-code.md) |
## Provider-native session options
@@ -85,7 +87,7 @@ model; it does not override the model list returned by a resolver.
Implement the `AgentClient` and `AgentSession` interfaces from `agent-sdk-types.ts` yourself. This gives full control but requires you to handle process management, streaming, permissions, and session persistence from scratch.
-Existing direct providers: `claude` (in `providers/claude/agent.ts`), `codex` (`codex-app-server-agent.ts`), `opencode` (`opencode/runtime-client.ts`), `pi` (`providers/pi/agent.ts`), and `omp` (`providers/omp/agent.ts`). The dev-only `mock` provider (`mock-load-test-agent.ts`) is also direct.
+Core direct providers: `claude` (in `providers/claude/agent.ts`), `codex` (`codex-app-server-agent.ts`), `opencode` (`opencode/runtime-client.ts`), `pi` (`providers/pi/agent.ts`), and `omp` (`providers/omp/agent.ts`). The dev-only `mock` provider (`mock-load-test-agent.ts`) is also direct.
Claude first-party model metadata lives in `packages/server/src/server/agent/providers/claude/model-manifest.ts`. When adding or updating a Claude model, update that manifest only; the model picker thinking options and Claude-specific feature gates are derived from the manifest. Do not add model-specific Claude capability lists in feature code.
diff --git a/packages/cli/tests/25-daemon-restart-supervisor.test.ts b/packages/cli/tests/25-daemon-restart-supervisor.test.ts
index f38caa5601..d3ae10e19c 100644
--- a/packages/cli/tests/25-daemon-restart-supervisor.test.ts
+++ b/packages/cli/tests/25-daemon-restart-supervisor.test.ts
@@ -21,6 +21,7 @@ import { runLocalPaseo } from "./helpers/local-cli.ts";
import { getAvailablePort } from "./helpers/network.ts";
const pollIntervalMs = 100;
+const daemonReadyTimeoutMs = 120_000;
const testEnv = {
PASEO_LOCAL_SPEECH_AUTO_DOWNLOAD: process.env.PASEO_LOCAL_SPEECH_AUTO_DOWNLOAD ?? "0",
PASEO_DICTATION_ENABLED: process.env.PASEO_DICTATION_ENABLED ?? "0",
@@ -135,7 +136,7 @@ import('node:fs').then(({appendFileSync}) => {
supervisor = await readDaemonInstance(paseoHome);
return supervisor?.pid === supervisorProcess?.pid && Boolean(supervisor?.listen);
},
- 120000,
+ daemonReadyTimeoutMs,
"daemon did not publish its bound endpoint in time",
);
assert(supervisor?.listen, "owned supervisor should publish its bound endpoint");
@@ -176,7 +177,8 @@ import('node:fs').then(({appendFileSync}) => {
"restart request should be acknowledged",
);
- const deadline = Date.now() + 20000;
+ // A restart includes worker startup and client reconnection, as initial readiness does.
+ const deadline = Date.now() + daemonReadyTimeoutMs;
let statusAfterRestart = statusBeforeRestart;
await waitFor(
async () => {
@@ -193,7 +195,7 @@ import('node:fs').then(({appendFileSync}) => {
throw error;
}
},
- 20000,
+ daemonReadyTimeoutMs,
"worker pid did not change after restart request",
);
assert.notStrictEqual(
diff --git a/packages/server/src/server/daemon-e2e/muse.real.e2e.test.ts b/packages/server/src/server/daemon-e2e/muse.real.e2e.test.ts
new file mode 100644
index 0000000000..d9d473511a
--- /dev/null
+++ b/packages/server/src/server/daemon-e2e/muse.real.e2e.test.ts
@@ -0,0 +1,95 @@
+import { execFileSync } from "node:child_process";
+import { mkdtemp, rm, writeFile } from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { expect, test } from "vitest";
+import { isCommandAvailable } from "../../executable-resolution/executable-resolution.js";
+import { loadPersistedConfig } from "../persisted-config.js";
+import { resolvePaseoHome } from "../paseo-home.js";
+import { BuiltinPluginLoader } from "../plugins/builtin/index.js";
+import { createTestPaseoDaemon } from "../test-utils/paseo-daemon.js";
+import { DaemonClient } from "../test-utils/daemon-client.js";
+
+test("Muse publishes its client settings bundle while installed plugins are disabled", async () => {
+ const daemon = await createTestPaseoDaemon({
+ builtinPlugins: new BuiltinPluginLoader(undefined, ["muse-provider"]),
+ });
+ const client = new DaemonClient({
+ url: `ws://127.0.0.1:${daemon.port}/ws`,
+ appVersion: "0.10.0",
+ });
+ try {
+ await client.connect();
+ const muse = (await client.getPluginCatalog()).find((plugin) => plugin.id === "muse-provider");
+ expect(muse?.clientBundle).toBeTypeOf("string");
+ expect(muse?.clientBundle).not.toBe("");
+ } finally {
+ await client.close();
+ await daemon.close();
+ }
+});
+
+test("Muse creates an agent, streams a text reply, and executes a real tool", async (context) => {
+ if (!(await isCommandAvailable("muse"))) {
+ context.skip();
+ return;
+ }
+ const cwd = await mkdtemp(path.join(os.tmpdir(), "paseo-muse-e2e-"));
+ await writeFile(path.join(cwd, "f"), "MUSE_TOOL_E2E_OK\n");
+ execFileSync("git", ["init", cwd], { stdio: "ignore" });
+ const configured = loadPersistedConfig(resolvePaseoHome()).agents?.providers?.muse;
+ const daemon = await createTestPaseoDaemon({
+ builtinPlugins: new BuiltinPluginLoader(undefined, ["muse-provider"]),
+ providerOverrides: { muse: { ...configured, enabled: true } },
+ });
+ const client = new DaemonClient({
+ url: `ws://127.0.0.1:${daemon.port}/ws`,
+ appVersion: "0.10.0",
+ });
+ try {
+ await client.connect();
+ await client.fetchAgents({ subscribe: {} });
+ const agent = await client.createAgent({ provider: "muse", cwd, modeId: "allowAll" });
+ await client.sendMessage(agent.id, "Reply exactly MUSE_TEXT_E2E_OK. Do not use tools.");
+ expect((await client.waitForFinish(agent.id, 120000)).status).toBe("idle");
+ const reply = await client.fetchAgentTimeline(agent.id, {
+ direction: "tail",
+ limit: 0,
+ projection: "canonical",
+ });
+ expect(
+ reply.entries.some(
+ (entry) =>
+ entry.item.type === "assistant_message" && entry.item.text.includes("MUSE_TEXT_E2E_OK"),
+ ),
+ ).toBe(true);
+ await client.sendMessage(
+ agent.id,
+ "Read the file f with the read_file tool and report its contents.",
+ );
+ expect((await client.waitForFinish(agent.id, 120000)).status).toBe("idle");
+ const tools = await client.fetchAgentTimeline(agent.id, {
+ direction: "tail",
+ limit: 0,
+ projection: "canonical",
+ });
+ expect(
+ tools.entries.some(
+ (entry) =>
+ entry.item.type === "tool_call" &&
+ entry.item.name === "read_file" &&
+ entry.item.status === "completed",
+ ),
+ ).toBe(true);
+ expect(
+ tools.entries.some(
+ (entry) =>
+ entry.item.type === "assistant_message" && entry.item.text.includes("MUSE_TOOL_E2E_OK"),
+ ),
+ ).toBe(true);
+ } finally {
+ await client.close();
+ await daemon.close();
+ await rm(cwd, { recursive: true, force: true });
+ }
+}, 300000);
diff --git a/packages/server/src/server/plugins/builtin/index.ts b/packages/server/src/server/plugins/builtin/index.ts
index 52f9c9df3c..eb6aab147e 100644
--- a/packages/server/src/server/plugins/builtin/index.ts
+++ b/packages/server/src/server/plugins/builtin/index.ts
@@ -11,6 +11,7 @@ export const builtinPlugins = [
"grok-usage-source",
"kimi-usage-source",
"minimax-usage-source",
+ "muse-provider",
"opencode-go-usage-source",
"zai-usage-source",
] as const;
diff --git a/packages/website/src/components/agent-icons.tsx b/packages/website/src/components/agent-icons.tsx
index 7b6b66146d..8488050b12 100644
--- a/packages/website/src/components/agent-icons.tsx
+++ b/packages/website/src/components/agent-icons.tsx
@@ -82,3 +82,37 @@ export function PiIcon(props: React.SVGProps) {
);
}
+
+export function MuseCodeIcon(props: React.SVGProps) {
+ return (
+
+
+ );
+}
+
+export function AntigravityIcon(props: React.SVGProps) {
+ return (
+
+
+ );
+}
diff --git a/packages/website/src/components/landing-page.tsx b/packages/website/src/components/landing-page.tsx
index d2d6684c93..6a29c62235 100644
--- a/packages/website/src/components/landing-page.tsx
+++ b/packages/website/src/components/landing-page.tsx
@@ -78,6 +78,8 @@ import {
CursorIcon,
OpenCodeIcon,
PiIcon,
+ MuseCodeIcon,
+ AntigravityIcon,
} from "~/components/agent-icons";
import { DiscordIcon, GitHubIcon, SlackIcon } from "~/components/brand-icons";
import { ClaudeIcon, MobileChat, MobileDiff, MobileSidebar, PhoneFrame } from "~/components/mockup";
@@ -161,6 +163,8 @@ function Hero({ title, subtitle }: { title: React.ReactNode; subtitle: React.Rea
const CLAUDE_CODE_BADGE_ICON =
Paseo supports many providers. It has custom implementations for Claude, Codex, OpenCode,
- Pi, and OMP, and supports many more via ACP. See the full list here:{" "}
+ Pi, OMP, Antigravity, and Muse Code, and supports many more via ACP. See the full list
+ here:{" "}
all supported providers
+ . See{" "}
+
+ Muse Code setup and limitations
+
.
diff --git a/packages/website/src/components/site-footer.tsx b/packages/website/src/components/site-footer.tsx
index f73192c98a..ba092410da 100644
--- a/packages/website/src/components/site-footer.tsx
+++ b/packages/website/src/components/site-footer.tsx
@@ -86,6 +86,18 @@ export function SiteFooter({ width = "default" }: SiteFooterProps) {
>
OpenCode
+
+ Antigravity
+
+
+ Muse Code
+
rootRouteImport,
} as any);
+const MuseCodeRoute = MuseCodeRouteImport.update({
+ id: "/muse-code",
+ path: "/muse-code",
+ getParentRoute: () => rootRouteImport,
+} as any);
const MistralVibeRoute = MistralVibeRouteImport.update({
id: "/mistral-vibe",
path: "/mistral-vibe",
@@ -296,6 +303,11 @@ const AuggieRoute = AuggieRouteImport.update({
path: "/auggie",
getParentRoute: () => rootRouteImport,
} as any);
+const AntigravityRoute = AntigravityRouteImport.update({
+ id: "/antigravity",
+ path: "/antigravity",
+ getParentRoute: () => rootRouteImport,
+} as any);
const AmpRoute = AmpRouteImport.update({
id: "/amp",
path: "/amp",
@@ -384,6 +396,7 @@ export interface FileRoutesByFullPath {
"/agents": typeof AgentsRoute;
"/agoragentic": typeof AgoragenticRoute;
"/amp": typeof AmpRoute;
+ "/antigravity": typeof AntigravityRoute;
"/auggie": typeof AuggieRoute;
"/autohand": typeof AutohandRoute;
"/blog": typeof BlogRouteWithChildren;
@@ -416,6 +429,7 @@ export interface FileRoutesByFullPath {
"/kimi": typeof KimiRoute;
"/minion-code": typeof MinionCodeRoute;
"/mistral-vibe": typeof MistralVibeRoute;
+ "/muse-code": typeof MuseCodeRoute;
"/nova": typeof NovaRoute;
"/omp": typeof OmpRoute;
"/opencode": typeof OpencodeRoute;
@@ -447,6 +461,7 @@ export interface FileRoutesByTo {
"/agents": typeof AgentsRoute;
"/agoragentic": typeof AgoragenticRoute;
"/amp": typeof AmpRoute;
+ "/antigravity": typeof AntigravityRoute;
"/auggie": typeof AuggieRoute;
"/autohand": typeof AutohandRoute;
"/changelog": typeof ChangelogRoute;
@@ -477,6 +492,7 @@ export interface FileRoutesByTo {
"/kimi": typeof KimiRoute;
"/minion-code": typeof MinionCodeRoute;
"/mistral-vibe": typeof MistralVibeRoute;
+ "/muse-code": typeof MuseCodeRoute;
"/nova": typeof NovaRoute;
"/omp": typeof OmpRoute;
"/opencode": typeof OpencodeRoute;
@@ -509,6 +525,7 @@ export interface FileRoutesById {
"/agents": typeof AgentsRoute;
"/agoragentic": typeof AgoragenticRoute;
"/amp": typeof AmpRoute;
+ "/antigravity": typeof AntigravityRoute;
"/auggie": typeof AuggieRoute;
"/autohand": typeof AutohandRoute;
"/blog": typeof BlogRouteWithChildren;
@@ -541,6 +558,7 @@ export interface FileRoutesById {
"/kimi": typeof KimiRoute;
"/minion-code": typeof MinionCodeRoute;
"/mistral-vibe": typeof MistralVibeRoute;
+ "/muse-code": typeof MuseCodeRoute;
"/nova": typeof NovaRoute;
"/omp": typeof OmpRoute;
"/opencode": typeof OpencodeRoute;
@@ -574,6 +592,7 @@ export interface FileRouteTypes {
| "/agents"
| "/agoragentic"
| "/amp"
+ | "/antigravity"
| "/auggie"
| "/autohand"
| "/blog"
@@ -606,6 +625,7 @@ export interface FileRouteTypes {
| "/kimi"
| "/minion-code"
| "/mistral-vibe"
+ | "/muse-code"
| "/nova"
| "/omp"
| "/opencode"
@@ -637,6 +657,7 @@ export interface FileRouteTypes {
| "/agents"
| "/agoragentic"
| "/amp"
+ | "/antigravity"
| "/auggie"
| "/autohand"
| "/changelog"
@@ -667,6 +688,7 @@ export interface FileRouteTypes {
| "/kimi"
| "/minion-code"
| "/mistral-vibe"
+ | "/muse-code"
| "/nova"
| "/omp"
| "/opencode"
@@ -698,6 +720,7 @@ export interface FileRouteTypes {
| "/agents"
| "/agoragentic"
| "/amp"
+ | "/antigravity"
| "/auggie"
| "/autohand"
| "/blog"
@@ -730,6 +753,7 @@ export interface FileRouteTypes {
| "/kimi"
| "/minion-code"
| "/mistral-vibe"
+ | "/muse-code"
| "/nova"
| "/omp"
| "/opencode"
@@ -762,6 +786,7 @@ export interface RootRouteChildren {
AgentsRoute: typeof AgentsRoute;
AgoragenticRoute: typeof AgoragenticRoute;
AmpRoute: typeof AmpRoute;
+ AntigravityRoute: typeof AntigravityRoute;
AuggieRoute: typeof AuggieRoute;
AutohandRoute: typeof AutohandRoute;
BlogRoute: typeof BlogRouteWithChildren;
@@ -794,6 +819,7 @@ export interface RootRouteChildren {
KimiRoute: typeof KimiRoute;
MinionCodeRoute: typeof MinionCodeRoute;
MistralVibeRoute: typeof MistralVibeRoute;
+ MuseCodeRoute: typeof MuseCodeRoute;
NovaRoute: typeof NovaRoute;
OmpRoute: typeof OmpRoute;
OpencodeRoute: typeof OpencodeRoute;
@@ -910,6 +936,13 @@ declare module "@tanstack/react-router" {
preLoaderRoute: typeof NovaRouteImport;
parentRoute: typeof rootRouteImport;
};
+ "/muse-code": {
+ id: "/muse-code";
+ path: "/muse-code";
+ fullPath: "/muse-code";
+ preLoaderRoute: typeof MuseCodeRouteImport;
+ parentRoute: typeof rootRouteImport;
+ };
"/mistral-vibe": {
id: "/mistral-vibe";
path: "/mistral-vibe";
@@ -1134,6 +1167,13 @@ declare module "@tanstack/react-router" {
preLoaderRoute: typeof AuggieRouteImport;
parentRoute: typeof rootRouteImport;
};
+ "/antigravity": {
+ id: "/antigravity";
+ path: "/antigravity";
+ fullPath: "/antigravity";
+ preLoaderRoute: typeof AntigravityRouteImport;
+ parentRoute: typeof rootRouteImport;
+ };
"/amp": {
id: "/amp";
path: "/amp";
@@ -1278,6 +1318,7 @@ const rootRouteChildren: RootRouteChildren = {
AgentsRoute: AgentsRoute,
AgoragenticRoute: AgoragenticRoute,
AmpRoute: AmpRoute,
+ AntigravityRoute: AntigravityRoute,
AuggieRoute: AuggieRoute,
AutohandRoute: AutohandRoute,
BlogRoute: BlogRouteWithChildren,
@@ -1310,6 +1351,7 @@ const rootRouteChildren: RootRouteChildren = {
KimiRoute: KimiRoute,
MinionCodeRoute: MinionCodeRoute,
MistralVibeRoute: MistralVibeRoute,
+ MuseCodeRoute: MuseCodeRoute,
NovaRoute: NovaRoute,
OmpRoute: OmpRoute,
OpencodeRoute: OpencodeRoute,
diff --git a/packages/website/src/routes/agents.tsx b/packages/website/src/routes/agents.tsx
index 884752b622..03548fe3bf 100644
--- a/packages/website/src/routes/agents.tsx
+++ b/packages/website/src/routes/agents.tsx
@@ -10,7 +10,7 @@ export const Route = createFileRoute("/agents")({
head: () =>
pageMeta(
"Supported agents – Every coding agent Paseo runs",
- "Run Claude Code, Codex, Copilot, OpenCode, Cursor CLI, Gemini CLI, and dozens more coding agents from your phone. Self-hosted, your code stays on your machine.",
+ "Run Claude Code, Codex, Copilot, OpenCode, Antigravity, Muse Code, Cursor CLI, Gemini CLI, and dozens more coding agents from your phone. Self-hosted, your code stays on your machine.",
"/agents",
),
component: AgentsPage,
diff --git a/packages/website/src/routes/antigravity.tsx b/packages/website/src/routes/antigravity.tsx
new file mode 100644
index 0000000000..3d821de7b9
--- /dev/null
+++ b/packages/website/src/routes/antigravity.tsx
@@ -0,0 +1,4 @@
+import { createFileRoute } from "@tanstack/react-router";
+import { agentRouteOptions } from "~/components/agent-route";
+
+export const Route = createFileRoute("/antigravity")(agentRouteOptions("antigravity"));
diff --git a/packages/website/src/routes/muse-code.tsx b/packages/website/src/routes/muse-code.tsx
new file mode 100644
index 0000000000..1a936492a9
--- /dev/null
+++ b/packages/website/src/routes/muse-code.tsx
@@ -0,0 +1,4 @@
+import { createFileRoute } from "@tanstack/react-router";
+import { agentRouteOptions } from "~/components/agent-route";
+
+export const Route = createFileRoute("/muse-code")(agentRouteOptions("muse-code"));
diff --git a/plugins/muse-provider/client/settings.tsx b/plugins/muse-provider/client/settings.tsx
new file mode 100644
index 0000000000..b057cf2cb0
--- /dev/null
+++ b/plugins/muse-provider/client/settings.tsx
@@ -0,0 +1,103 @@
+import { useCallback, useMemo } from "react";
+import { Text } from "react-native";
+import { useSettings, type PluginScreenProps, type SettingsState } from "@getpaseo/plugin/client";
+import {
+ SettingsAction,
+ SettingsCard,
+ SettingsSection,
+ SettingsSelect,
+ SettingsSwitch,
+} from "@getpaseo/plugin/client/ui";
+import { museSettings } from "../shared/settings.js";
+
+const networks = [
+ { label: "Proxy only", value: "proxy-only" },
+ { label: "Restricted", value: "restricted" },
+ { label: "Enabled", value: "enabled" },
+] as const;
+type ReadySettings = Extract, { status: "ready" }>;
+
+function Controls({
+ settings,
+ theme,
+}: {
+ settings: ReadySettings;
+ theme: PluginScreenProps["theme"];
+}) {
+ const style = useMemo(() => ({ color: theme.colors.foreground }), [theme]);
+ const changeSandbox = useCallback(
+ (sandbox: boolean) => {
+ void settings.save({ ...settings.values, sandbox }, settings.revision);
+ },
+ [settings],
+ );
+ const changeNetwork = useCallback(
+ (network: ReadySettings["values"]["network"]) => {
+ void settings.save({ ...settings.values, network }, settings.revision);
+ },
+ [settings],
+ );
+ const changeTrust = useCallback(
+ (trustWorkspace: boolean) => {
+ void settings.save({ ...settings.values, trustWorkspace }, settings.revision);
+ },
+ [settings],
+ );
+ return (
+
+
+
+
+ Changes apply to new Muse sessions. Disabling the sandbox enables full network access. Trust
+ workspace lets Muse load project skills and configuration.
+
+ {settings.saveError ? (
+
+ {settings.saveError}
+
+ ) : null}
+
+ );
+}
+
+export function MuseSettings({ theme }: PluginScreenProps) {
+ const settings = useSettings(museSettings);
+ const style = useMemo(() => ({ color: theme.colors.foreground }), [theme]);
+ if (settings.status === "loading") return Loading settings… ;
+ if (settings.status !== "ready")
+ return (
+
+
+ {settings.error}
+
+
+ );
+ return ();
+ private readonly hosts = new Set();
+ private closed = false;
+ async read(launch: ProviderLaunch): Promise {
+ if (this.closed) throw new Error("Muse catalogue is closed");
+ const key = launchKey(launch);
+ const cached = this.cache.get(key);
+ if (cached && cached.expires > Date.now()) return cached.catalog;
+ const host = new MspConnection({ launch, timeoutMs: 5000 });
+ this.hosts.add(host);
+ try {
+ await host.initialize();
+ const response = await host.request("model/list", {}, catalogSchema);
+ const catalog = presentCatalog(response);
+ if (!this.closed) {
+ if (this.cache.size >= 8) this.cache.delete(this.cache.keys().next().value!);
+ this.cache.set(key, { expires: Date.now() + 60000, catalog });
+ }
+ return catalog;
+ } finally {
+ await host.close();
+ this.hosts.delete(host);
+ }
+ }
+ async close(): Promise {
+ this.closed = true;
+ this.cache.clear();
+ await Promise.all([...this.hosts].map((host) => host.close()));
+ }
+}
+
+export function presentCatalog(response: z.infer): ProviderCatalog {
+ const models = response.models.map((model) => {
+ let supported: z.infer[] = efforts;
+ if (Array.isArray(model.reasoningEffortVariants) && model.reasoningEffortVariants.length > 0)
+ supported = model.reasoningEffortVariants;
+ else if (model.variants.length > 0) supported = model.variants;
+ return {
+ id: model.modelId,
+ label: model.displayLabel,
+ isDefault: model.isDefault,
+ contextWindowMaxTokens: model.contextLimit ?? undefined,
+ thinkingOptions: supported.map((id) => ({
+ id,
+ label: id,
+ isDefault: id === model.defaultReasoningEffort,
+ })),
+ defaultThinkingOptionId: model.defaultReasoningEffort ?? undefined,
+ metadata: { providerId: model.providerId },
+ };
+ });
+ const defaultModel = models.find((model) => model.isDefault);
+ return {
+ models,
+ modes,
+ defaultMode: "onRequest",
+ defaultModel: defaultModel?.id,
+ };
+}
diff --git a/plugins/muse-provider/server/children.ts b/plugins/muse-provider/server/children.ts
new file mode 100644
index 0000000000..69e0f4a855
--- /dev/null
+++ b/plugins/muse-provider/server/children.ts
@@ -0,0 +1,94 @@
+import type { ProviderEvent } from "@getpaseo/plugin/server/provider";
+import { MspConnection, type Notification } from "./connection.js";
+import { Timeline } from "./timeline.js";
+import {
+ childSessionSchema,
+ pageSchema,
+ itemNotificationSchema,
+ notificationSchema,
+ deltaSchema,
+ type WireItem,
+} from "./wire.js";
+
+interface Child {
+ timeline: Timeline;
+ cursor: string | undefined;
+}
+export class Children {
+ private readonly children = new Map();
+ constructor(
+ private readonly host: MspConnection,
+ private readonly parentId: string,
+ private readonly cwd: string,
+ private readonly emit: (event: ProviderEvent) => void,
+ ) {}
+
+ async update(item: WireItem): Promise {
+ if (
+ !item.childSessionId ||
+ !(
+ item.kind === "subagent" ||
+ item.kind === "workflow" ||
+ item.tool === "workflow" ||
+ item.tool.startsWith("subagent_")
+ )
+ )
+ return;
+ const id = item.childSessionId;
+ if (!this.children.has(id)) {
+ const { session } = await this.host.request(
+ "session/read",
+ { sessionId: id },
+ childSessionSchema,
+ );
+ this.emit({
+ type: "session.opened",
+ sessionId: id,
+ parentSessionId: this.parentId,
+ toolCallId: item.callId ?? item.itemId,
+ capabilities: [],
+ restoration: "parent",
+ cwd: session.workspaceRoot ?? this.cwd,
+ title: session.title,
+ });
+ this.children.set(id, {
+ timeline: new Timeline(this.host, id, id, this.emit),
+ cursor: undefined,
+ });
+ }
+ await this.page(id);
+ }
+ async notify(id: string, event: Notification): Promise {
+ const child = this.children.get(id);
+ if (!child) return;
+ if (["item/started", "item/updated", "item/completed"].includes(event.method)) {
+ const { item } = itemNotificationSchema.parse(event.params);
+ await child.timeline.fold(item);
+ } else if (event.method === "item/delta") child.timeline.delta(deltaSchema.parse(event.params));
+ }
+ async refresh(): Promise {
+ for (const id of this.children.keys()) await this.page(id);
+ }
+ private async page(id: string): Promise {
+ const child = this.children.get(id)!;
+ let next: string | null;
+ do {
+ const page = await this.host.request(
+ "view/page",
+ { sessionId: id, cursor: child.cursor, limit: 1000, direction: "forward" },
+ pageSchema,
+ );
+ for (const event of page.events) {
+ await this.notify(id, event);
+ const envelope = notificationSchema.parse(event.params);
+ if (envelope.viewCursor) child.cursor = envelope.viewCursor;
+ }
+ next = page.nextCursor;
+ if (next !== null) child.cursor = next;
+ } while (next !== null);
+ }
+ close(): void {
+ for (const sessionId of this.children.keys()) this.emit({ type: "session.closed", sessionId });
+ this.children.clear();
+ }
+}
diff --git a/plugins/muse-provider/server/commands.ts b/plugins/muse-provider/server/commands.ts
new file mode 100644
index 0000000000..df62f72537
--- /dev/null
+++ b/plugins/muse-provider/server/commands.ts
@@ -0,0 +1,56 @@
+import type { ProviderEvent, ProviderPrompt } from "@getpaseo/plugin/server/provider";
+import type { TurnStartParams } from "./msp.js";
+import { MspConnection } from "./connection.js";
+import { ackSchema, skillsSchema } from "./wire.js";
+import { MuseError } from "./errors.js";
+
+export class Commands {
+ private selectors = new Set();
+ constructor(
+ private readonly host: MspConnection,
+ private readonly sessionId: string,
+ private readonly id: string,
+ private readonly emit: (event: ProviderEvent) => void,
+ ) {}
+
+ async refresh(): Promise {
+ const { skills } = await this.host.request(
+ "skill/list",
+ { sessionId: this.sessionId },
+ skillsSchema,
+ );
+ this.selectors = new Set(skills.map((skill) => skill.selector));
+ this.emit({
+ type: "session.commands",
+ sessionId: this.id,
+ commands: [
+ { name: "compact", description: "Compact conversation context" },
+ ...skills
+ .filter((skill) => skill.selector !== "compact")
+ .map((skill) => ({
+ name: skill.selector,
+ description: skill.description,
+ argumentHint: skill.argumentHint,
+ })),
+ ],
+ });
+ }
+ async compact(prompt: ProviderPrompt): Promise {
+ if (prompt.input.type !== "command" || prompt.input.name !== "compact") return false;
+ await this.host.command("session/compact", { sessionId: this.sessionId }, ackSchema);
+ this.emit({
+ type: "session.prompt_result",
+ sessionId: this.id,
+ clientMessageId: prompt.clientMessageId,
+ result: { type: "completed" },
+ });
+ return true;
+ }
+ input(
+ command: Extract,
+ ): TurnStartParams["input"][number] {
+ if (!this.selectors.has(command.name))
+ throw new MuseError("unknownCommand", `Muse skill is unavailable: ${command.name}`);
+ return { type: "skill", selector: command.name, arguments: command.arguments };
+ }
+}
diff --git a/plugins/muse-provider/server/connection.ts b/plugins/muse-provider/server/connection.ts
new file mode 100644
index 0000000000..100bd101c7
--- /dev/null
+++ b/plugins/muse-provider/server/connection.ts
@@ -0,0 +1,193 @@
+import type { ProviderLaunch } from "@getpaseo/plugin/server/provider";
+import { spawn } from "node:child_process";
+import { randomBytes } from "node:crypto";
+import { createInterface } from "node:readline";
+import { setTimeout as delay } from "node:timers/promises";
+import { z } from "zod";
+import { MuseError, classifyExit } from "./errors.js";
+import { frameSchema, initializedSchema, fingerprint } from "./wire.js";
+
+export function commandId(): string {
+ const bytes = randomBytes(16);
+ bytes.writeUIntBE(Date.now(), 0, 6);
+ bytes[6] = 0x70 | (bytes[6]! & 0x0f);
+ bytes[8] = 0x80 | (bytes[8]! & 0x3f);
+ const hex = bytes.toString("hex");
+ return `${hex.slice(0, 8)}-${hex.slice(8, 12)}-${hex.slice(12, 16)}-${hex.slice(16, 20)}-${hex.slice(20)}`;
+}
+
+interface PendingRequest {
+ resolve(value: unknown): void;
+ reject(error: Error): void;
+ timer: ReturnType;
+}
+export interface Notification {
+ method: string;
+ params: unknown;
+}
+
+export class MspConnection {
+ private readonly child;
+ private readonly pending = new Map();
+ private readonly listeners = new Set<(notification: Notification) => void>();
+ private readonly exitListeners = new Set<(error: MuseError) => void>();
+ private sequence = 0;
+ private stderr = "";
+ private failure: MuseError | null = null;
+ private closing = false;
+ private readonly exited: Promise;
+
+ constructor(
+ private readonly options: {
+ launch: ProviderLaunch;
+ cwd?: string;
+ timeoutMs?: number;
+ serveArgs?: string[];
+ },
+ ) {
+ const { launch, cwd } = options;
+ this.child = spawn(launch.command, [...launch.args, "serve", ...(options.serveArgs ?? [])], {
+ env: launch.env,
+ cwd,
+ stdio: "pipe",
+ });
+ this.child.stderr.setEncoding("utf8");
+ this.child.stderr.on("data", (chunk: string) => {
+ this.stderr = (this.stderr + chunk).slice(-8192);
+ });
+ const lines = createInterface({ input: this.child.stdout });
+ lines.on("line", (line) => {
+ try {
+ this.receive(frameSchema.parse(JSON.parse(line)));
+ } catch (error) {
+ const message = error instanceof Error ? error.message : String(error);
+ this.fail(new MuseError("invalidFrame", `Invalid MSP frame: ${message}`));
+ this.child.kill();
+ }
+ });
+ this.child.stdin.on("error", () => {
+ /* Process exit owns the diagnostic and pending requests. */
+ });
+ this.child.on("error", (error) => this.fail(new MuseError("spawn", error.message)));
+ this.exited = new Promise((resolve) => {
+ this.child.once("close", (code, signal) => {
+ lines.close();
+ this.fail(classifyExit(code, signal, this.stderr));
+ resolve();
+ });
+ });
+ }
+
+ async initialize(): Promise {
+ const response = await this.request(
+ "initialize",
+ {
+ clientInfo: { name: "paseo", version: "1" },
+ capabilities: {
+ experimentalApi: true,
+ requestedCapabilities: ["sessionMcp", "sessionListStream"],
+ },
+ },
+ initializedSchema,
+ );
+ if (response.schema.fingerprint !== fingerprint) {
+ process.stderr.write(
+ `Muse MSP fingerprint mismatch: expected ${fingerprint}, received ${response.schema.fingerprint}\n`,
+ );
+ }
+ this.write({ jsonrpc: "2.0", method: "initialized", params: {} });
+ }
+
+ onNotification(listener: (notification: Notification) => void): () => void {
+ this.listeners.add(listener);
+ return () => this.listeners.delete(listener);
+ }
+ onExit(listener: (error: MuseError) => void): () => void {
+ this.exitListeners.add(listener);
+ return () => this.exitListeners.delete(listener);
+ }
+ async command(method: string, params: P, schema: z.ZodType): Promise {
+ const id =
+ "commandId" in params && typeof params.commandId === "string"
+ ? params.commandId
+ : commandId();
+ const input = { ...params, commandId: id };
+ for (let attempt = 0; ; attempt++) {
+ try {
+ return await this.request(method, input, schema);
+ } catch (error) {
+ const retryable =
+ error instanceof MuseError && ["overloaded", "backpressured"].includes(error.kind);
+ if (!retryable || attempt === 2) throw error;
+ await delay(100 * (attempt + 1));
+ }
+ }
+ }
+ async request(method: string, params: object, schema: z.ZodType): Promise {
+ if (this.failure) throw this.failure;
+ if (this.closing) throw new MuseError("closed", "Muse host is closing");
+ const id = ++this.sequence;
+ const response = await new Promise((resolve, reject) => {
+ const timer = setTimeout(() => {
+ this.pending.delete(id);
+ reject(new MuseError("timeout", `Muse ${method} timed out`));
+ }, this.options.timeoutMs ?? 10000);
+ this.pending.set(id, { resolve, reject, timer });
+ this.write({ jsonrpc: "2.0", id, method, params });
+ });
+ return schema.parse(response);
+ }
+ async close(): Promise {
+ if (this.closing) return this.exited;
+ this.closing = true;
+ this.child.stdin.end();
+ const drained = await Promise.race([
+ this.exited.then(() => true),
+ delay(1000).then(() => false),
+ ]);
+ if (!drained) this.child.kill("SIGKILL");
+ await this.exited;
+ }
+ private write(frame: object): void {
+ this.child.stdin.write(JSON.stringify(frame) + "\n");
+ }
+ private receive(frame: z.infer): void {
+ if (frame.method) {
+ if (frame.id !== undefined) {
+ if (["approval/request", "userInput/request"].includes(frame.method)) {
+ this.write({ jsonrpc: "2.0", id: frame.id, result: {} });
+ } else {
+ this.write({
+ jsonrpc: "2.0",
+ id: frame.id,
+ error: { code: -32601, message: "Unsupported server request" },
+ });
+ }
+ return;
+ }
+ for (const listener of this.listeners)
+ listener({ method: frame.method, params: frame.params });
+ return;
+ }
+ if (frame.id === undefined) throw new MuseError("invalidFrame", "MSP response has no id");
+ const pending = this.pending.get(frame.id);
+ if (!pending) return;
+ clearTimeout(pending.timer);
+ this.pending.delete(frame.id);
+ if (frame.error) {
+ let kind = frame.error.data?.kind ?? "rpc";
+ if (frame.error.code === -32020) kind = "sessionNotFound";
+ pending.reject(new MuseError(kind, frame.error.message, undefined, frame.error.data?.reason));
+ } else pending.resolve(frame.result);
+ }
+ private fail(error: MuseError): void {
+ if (this.failure) return;
+ this.failure = error;
+ for (const pending of this.pending.values()) {
+ clearTimeout(pending.timer);
+ pending.reject(error);
+ }
+ this.pending.clear();
+ if (!this.closing) for (const listener of this.exitListeners) listener(error);
+ }
+}
diff --git a/plugins/muse-provider/server/errors.ts b/plugins/muse-provider/server/errors.ts
new file mode 100644
index 0000000000..86f6254af6
--- /dev/null
+++ b/plugins/muse-provider/server/errors.ts
@@ -0,0 +1,81 @@
+import type { ProviderError, ProviderLaunch } from "@getpaseo/plugin/server/provider";
+import path from "node:path";
+
+export class MuseError extends Error {
+ constructor(
+ readonly kind: string,
+ message: string,
+ readonly diagnostic?: string,
+ readonly reason?: string,
+ ) {
+ super(message);
+ this.name = "MuseError";
+ }
+ toProviderError(): ProviderError {
+ return { code: this.kind, message: this.message, diagnostic: this.diagnostic };
+ }
+}
+
+export function classifyExit(
+ code: number | null,
+ signal: string | null,
+ stderr: string,
+): MuseError {
+ const kinds: Record = {
+ 0: "cleanExit",
+ 2: "usage",
+ 3: "credentials",
+ 4: "leaseHeld",
+ 5: "surfaceOff",
+ };
+ const kind = code === null ? "crash" : (kinds[code] ?? "crash");
+ return new MuseError(kind, `Muse host exited (${code ?? signal}). ${stderr}`);
+}
+
+function isUnavailableReviewer(message: string): boolean {
+ return message.includes("automated reviewer is unavailable");
+}
+
+export function actionableError(error: unknown, launch: ProviderLaunch): ProviderError {
+ if (!(error instanceof Error)) return { code: "muse", message: String(error) };
+ // Muse 1.4.1 reports this profile failure as internal, without a specific error kind.
+ if (
+ error instanceof MuseError &&
+ error.kind === "internal" &&
+ isUnavailableReviewer(error.message)
+ ) {
+ const configHome = launch.env.XDG_CONFIG_HOME ?? path.join(launch.env.HOME ?? "~", ".config");
+ return {
+ code: "defaultProfileUnavailable",
+ message: `Change permissions.default_profile in ${path.join(configHome, "muse/settings.json")}: the automated reviewer is unavailable on this host.`,
+ };
+ }
+ if (error instanceof MuseError && error.reason === "compaction_unavailable") {
+ return {
+ code: error.kind,
+ message:
+ "Muse cannot compact this session with its current model configuration. Ensure Muse has a context limit for the selected model (context_compaction.provider_context_limit_tokens).",
+ diagnostic: error.message,
+ };
+ }
+ if (error instanceof MuseError && error.kind === "sessionNotFound") {
+ return { code: error.kind, message: "This Muse session no longer exists. Create a new agent." };
+ }
+ if (error instanceof MuseError && error.kind === "authRequired") {
+ return { code: error.kind, message: "Run `muse login` or set META_API_KEY." };
+ }
+ // Muse 1.4.1 reports this bootstrap failure as internal, without a specific error kind.
+ if (
+ error instanceof MuseError &&
+ error.kind === "internal" &&
+ error.message.includes("UnsafePath")
+ ) {
+ const dataHome = launch.env.XDG_DATA_HOME ?? path.join(launch.env.HOME ?? "~", ".local/share");
+ return {
+ code: "unsafePath",
+ message: `Muse data directory ${path.join(dataHome, "muse")} requires mode 0700. Set its permissions before retrying.`,
+ };
+ }
+ if (error instanceof MuseError) return error.toProviderError();
+ return { code: "muse", message: error.message };
+}
diff --git a/plugins/muse-provider/server/msp.d.ts b/plugins/muse-provider/server/msp.d.ts
new file mode 100644
index 0000000000..8f2180932d
--- /dev/null
+++ b/plugins/muse-provider/server/msp.d.ts
@@ -0,0 +1,2690 @@
+// Vendored from Muse Code 1.4.1 via muse schema generate-ts.
+// Stable fingerprint: sha256:e0e163db6ccf00dbe68402ce55d6319b3edc33c421f31e9583b587b2de8a118f
+// Muse Session Protocol (MSP) v1 TypeScript declarations.
+// STABLE surface only; experimental twin: experimental/msp.d.ts.
+// Generated by tbh-protocol (spec 206) from the same schema model as
+// the JSON Schema bundle (INV-017). Do not edit by hand.
+
+export interface ApprovalAmendment {
+ durability: ApprovalAmendmentDurability;
+ rulePreview: string;
+}
+
+export type ApprovalAmendmentDurability = "session" | "localPersistent" | (string & {});
+
+export interface ApprovalChange {
+ choiceId?: string;
+ decision?: ApprovalDecision;
+ executable?: boolean;
+ kind: string;
+ reason?: string;
+ reparsed?: boolean;
+ requirementId?: ApprovalRequirementRef;
+ status?: ApprovalPersistenceStatus;
+}
+
+export interface ApprovalChoice {
+ acceptsFeedback?: boolean;
+ choiceId: string;
+ decision: ApprovalDecision;
+ label: string;
+ rulePreview?: string;
+ scope: ApprovalChoiceScope;
+}
+
+export type ApprovalChoiceScope = "once" | "session" | "localPersistent" | (string & {});
+
+/** `approval/decide` params (tdd SS5.4): the decision. A standard SS3 command — requires the session loaded on this host, requires `commandId`, durable intake before ack, value-identical replay. */
+export interface ApprovalDecideParams {
+ /** The approval being decided. */
+ approvalId: string;
+ /** One of the current `availableChoices`; else -32052. */
+ choiceId: string;
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** Free-text guidance delivered to the model with the denial. Only valid on choices with `acceptsFeedback`. Never persisted in the durable audit record (live steer only), so it is absent from `approval/resolved` (tdd SS5.4). Omitted and explicit `null` both mean "no feedback" (#23468). */
+ feedback?: string | null;
+ /** Must equal the approval's `currentRequirementId`. The multi-stage race guard: a decision aimed at stage 1 can never accidentally satisfy stage 2, and a stale value is -32053 (tdd SS5.4). */
+ requirementId: ApprovalRequirementRef;
+ /** The target session. */
+ sessionId: string;
+}
+
+/** `approval/decide` result (tdd SS5.4). Admission-ack rules still apply: the authoritative outcome is `approval/resolved` / `approval/updated` on the view stream. */
+export interface ApprovalDecideResult {
+ /** The approval this decision was applied to. */
+ approvalId: string;
+ /** Echoes the client's id. */
+ commandId: string;
+ /** Admission status. */
+ status: CommandStatus;
+ /** `false` when the choice satisfied a stage but further requirements remain (the approval stays pending and an updated `approval/request` follows); `true` when this decision produced the terminal `DecisionApplied` (tdd SS5.4). */
+ terminal: boolean;
+}
+
+export type ApprovalDecision =
+ | "approved"
+ | "approvedForSession"
+ | "approvedPolicyAmendment"
+ | "denied"
+ | "deniedPolicyAmendment"
+ | "timedOut"
+ | "abort"
+ | (string & {});
+
+/** `approval/listPending` params (tdd SS5.7): the pull dual of the re-issued requests. A log-fold read — no lease, works on loaded and unloaded sessions, never subscribes. */
+export interface ApprovalListPendingParams {
+ /** The session to read. */
+ sessionId: string;
+}
+
+/** `approval/listPending` result (tdd SS5.7). Ordering is by opening `viewCursor`; empty arrays when nothing is pending. The result is point-in-time — to act on it race-safely, `approval/decide` carries the `requirementId` guard regardless of how the client learned the state. */
+export interface ApprovalListPendingResult {
+ /** Exactly the `approval/request` params of tdd SS5.3, one per pending approval. */
+ approvals: ApprovalRequestParams[];
+ /** Exactly the `userInput/request` params of tdd SS5.10, one per pending prompt. */
+ userInputs: UserInputRequestParams[];
+}
+
+/** The approval enforcement modes (tdd SS5.12, camelCased `ApprovalBackendMode`). **Closed** by design (D-006, select-never-create): a client selects a preconfigured mode and can never construct one; widening this enum is a deliberate, gate-visible protocol change. */
+export type ApprovalMode = "allowAll" | "promptUnmatched" | "onRequest" | "denyUnmatched";
+
+/** Whether a mode change did anything (tdd SS5.12), mirroring `ApprovalReconfigureApplyOutcome`. Apply failures are `commandRejected`. */
+export type ApprovalModeApplyOutcome = "completed" | "noop" | (string & {});
+
+/** How an approval mode took effect (tdd SS5.12, the effective-mode projection's `source` vocabulary). Open. */
+export type ApprovalModeSource = "startup" | "replay" | "approvalReconfigure" | (string & {});
+
+export interface ApprovalOrigin {
+ command?: string;
+ kind: string;
+ url?: string;
+}
+
+export type ApprovalPersistenceStatus = "succeeded" | "failed" | (string & {});
+
+export type ApprovalPolicyResult = "allow" | "deny" | (string & {});
+
+/** Full params shared by `approval/request` and `approval/requested`. */
+export interface ApprovalRequestParams {
+ approvalId: string;
+ availableChoices: ApprovalChoice[];
+ currentRequirementId: ApprovalRequirementRef;
+ itemId: string;
+ judgeEscalated: boolean;
+ protectedWrite: boolean;
+ rawArgs: string;
+ sessionId: string;
+ sourceRange: SourceRange;
+ /** Present only for a child (native subagent) approval projected onto the parent session's plane (ADR 36182); parent-own approvals omit it. */
+ subagentOrigin?: ApprovalSubagentOrigin;
+ subject: ApprovalSubject;
+ taskId: string;
+ toolCallId: string;
+ toolName: string;
+ turnId: string;
+ viewCursor: string;
+}
+
+/** Approval-stage token carried in SS5 params and stale-requirement errors. */
+export interface ApprovalRequirementRef {
+ approvalId: string;
+ sourceIndex: number;
+}
+
+/** Winning terminal returned to a losing `approval/decide` command. */
+export interface ApprovalResolutionSummary {
+ decision: string;
+ resolvedBy: string;
+ viewCursor: string;
+}
+
+export type ApprovalResolvedBy = "user" | "policy" | "llmJudge" | (string & {});
+
+/** `approval/resolved` params: the first durable terminal decision. */
+export interface ApprovalResolvedParams {
+ amendment?: ApprovalAmendment;
+ approvalId: string;
+ decidedByCommandId?: string;
+ decision: ApprovalDecision;
+ itemId: string;
+ policyResult: ApprovalPolicyResult;
+ resolvedBy: ApprovalResolvedBy;
+ sessionId: string;
+ sourceRange: SourceRange;
+ stageEvidence: ApprovalStageEvidence[];
+ /** Present only for a child (native subagent) approval projected onto the parent session's plane (ADR 36182); parent-own approvals omit it. */
+ subagentOrigin?: ApprovalSubagentOrigin;
+ turnId: string;
+ viewCursor: string;
+}
+
+export interface ApprovalStage {
+ argv: string[];
+ argvComplete: boolean;
+ position: number;
+ requirementId: ApprovalRequirementRef;
+ resolution: ApprovalStageResolution;
+ suggestedPrefix?: ApprovalSuggestedPrefix;
+ totalStages: number;
+}
+
+export interface ApprovalStageEvidence {
+ argv: string[];
+ position: number;
+ requirementId: ApprovalRequirementRef;
+ resolution: ApprovalStageResolution;
+ totalStages: number;
+}
+
+export interface ApprovalStageResolution {
+ argvPrefix?: string[];
+ diagnostic?: string;
+ kind: string;
+}
+
+/** Child (native subagent) provenance for an approval projected onto the PARENT session's approval plane (#36182 / ADR 36182): identifies the originating child run/agent so a client can attribute the prompt. Omitted (`skip_serializing_if`) on the parent's own approvals, so pre-existing parent frames stay byte-identical. */
+export interface ApprovalSubagentOrigin {
+ /** The child run that parked on this approval. */
+ childRunId: string;
+ /** The child session stream id whose records carry this approval. */
+ childSessionId: string;
+ /** The originating child's subagent id, from the parent session's durable subagent control records. */
+ subagentId: string;
+}
+
+/** Open approval subject union. Unknown kinds are rendered generically and never auto-approved by clients (tdd SS5.2). */
+export interface ApprovalSubject {
+ access?: string;
+ command?: string;
+ host?: string;
+ /** Open discriminator: `shell | fileAccess | network | unixSocket | process | tool`. */
+ kind: string;
+ origin?: ApprovalOrigin;
+ path?: string;
+ port?: number;
+ protocol?: string;
+ stages?: ApprovalStage[];
+ target?: string;
+ toolName?: string;
+ workspaceRoot?: string;
+}
+
+export interface ApprovalSuggestedPrefix {
+ argvPrefix: string[];
+ label: string;
+}
+
+/** `approval/updated` params: the refreshed pending view plus one change. */
+export interface ApprovalUpdatedParams {
+ approvalId: string;
+ availableChoices: ApprovalChoice[];
+ change: ApprovalChange;
+ currentRequirementId: ApprovalRequirementRef;
+ sessionId: string;
+ sourceRange: SourceRange;
+ /** Present only for a child (native subagent) approval projected onto the parent session's plane (ADR 36182); parent-own approvals omit it. */
+ subagentOrigin?: ApprovalSubagentOrigin;
+ subject: ApprovalSubject;
+ viewCursor: string;
+}
+
+/** One attention flag (tdd SS2.4, ADR 31983 D3): a pending server-initiated request class parked on the session. Open on the wire — clients MUST ignore unknown values; future attention kinds are additive. */
+export type AttentionFlag = "approvalPending" | "inputPending" | (string & {});
+
+/** Who durably backgrounded a task (tdd SS4.5.5, `TaskBackgroundedInitiator`). Open — runtime vocabulary. */
+export type BackgroundInitiator = "user" | "timeout" | (string & {});
+
+/** The latest branch observation in the snapshot (tdd SS4.6.4, SS4.9.1). */
+export interface BranchState {
+ /** The observed branch; `null` on a detached-HEAD observation. */
+ branch: string | null;
+ /** The detected version-control system; absent when none was detected. */
+ vcs?: Vcs;
+ /** The observed workspace root. */
+ workspaceRoot: string;
+}
+
+/** A grantable capability name (SS1.4.4). Open: the reserved `rawLog` entry joins this domain as an additive open-enum extension when SS6 un-defers (#13929, Scenario 5 AS-3) — closed would make that a retype. */
+export type CapabilityName = "userShell" | "sessionMcp" | "sessionListStream" | (string & {});
+
+/** The client's requested capability posture (SS1.4.1). Every member defaults; an absent `capabilities` object means all defaults. */
+export interface ClientCapabilities {
+ /** Opt into experimental methods, fields, and variants (default `false`). */
+ experimentalApi?: boolean;
+ /** Exact notification method names the client declines; no wildcards; unknown names accepted and ignored; the protected set (SS1.7) cannot be opted out. */
+ optOutNotificationMethods?: string[];
+ /** Names from the capability registry. Unknown entries are not an error and simply do not appear in `grantedCapabilities` — which is why this is a list of free strings rather than of registry names. */
+ requestedCapabilities?: string[];
+ /** Whether this client can render a `userInput/request` dialog and answer it (SS5.10). **Absent means capable** (D-047): a client that predates the member keeps today's contract, so no existing client changes its handshake. `false` makes the host withhold `userInput/request` toward this client — the D-027 additive-optional-field + withheld-method convention. Deliberately NOT a `requestedCapabilities` name: that registry records operations a host GRANTS (SS1.4.4), and whether a client can draw a dialog is a fact about the client, never a privilege the host hands out. */
+ userInputDialogs?: boolean;
+}
+
+/** Client identification inside `initialize` params (SS1.4.1). Diagnostics and telemetry attribution only; never an authority claim (SS1.10). */
+export interface ClientInfo {
+ /** Machine identifier, `[a-z0-9_]+` (SS1.4.1). */
+ name: string;
+ /** Human display name. */
+ title?: string;
+ /** Client version string. */
+ version: string;
+}
+
+/** The uniform SS3.1.2 command acknowledgement: admission only, never an outcome. `session/compact` alone may answer `"noop"`; every other command answers `"accepted"`. */
+export interface CommandAcceptedResult {
+ /** Echo of the client-minted UUIDv7 `commandId` (SS3.1.1). */
+ commandId: string;
+ /** `"accepted"` for every admitted command (SS3.1.2; closed vocabulary). */
+ status: CommandAckStatus;
+}
+
+/** The ack-status vocabulary (`tdd.md` SS3.1/SS3.1.2): `"accepted"` for every admitted command; `session/compact` alone may answer `"noop"`. Closed: SS3.1.2 names exactly these two values, so SDK clients get a discriminated type and validation catches a wrong status (PR #21550 review) — and a client that received a third value would have been told nothing it can act on, unlike [`TurnStartDisposition`], where "acked, not otherwise classified" is a usable reading. */
+export type CommandAckStatus = "accepted" | "noop";
+
+/** The SS3.1.2 ack `status`: `accepted` for every admitted command. `session/compact` is the one method that may additionally answer `noop` ([`crate::method::runtime::CompactStatus`]); no other command uses another status (tdd SS3.1.2). */
+export type CommandStatus = "accepted" | (string & {});
+
+/** `session/compact`'s ack status (tdd SS3.7): the one method that may answer `noop` in addition to the SS3.1.2 `accepted`. A noop is a success, not an error, and it is durably settled like any other outcome. */
+export type CompactStatus = "accepted" | "noop" | (string & {});
+
+/** Compaction outcome (tdd SS4.5.10, the SS3.7 vocabulary). Open. */
+export type CompactionOutcome = "compacted" | "noop" | "failed" | "cancelled" | (string & {});
+
+/** What initiated a compaction (tdd SS4.5.10). Open. */
+export type CompactionTrigger = "manual" | "auto" | (string & {});
+
+/** Context pressure level (tdd SS4.6.6): hard threshold first, both inclusive `>=`. Open. */
+export type ContextPressureLevel = "normal" | "warning" | "blocked" | (string & {});
+
+/** The SS4.9.1 snapshot `contextUsage` block: the latest `(windowTokens, usedTokens, pressure)` triple; the snapshot member is `null` until the fold's generation chain holds a tracked anchor AND the current basis is present (absent is never fabricated). */
+export interface ContextUsage {
+ /** Server-computed pressure level. */
+ pressure: ContextPressureLevel;
+ /** Counted-once occupancy at the latest provider-reported fact. */
+ usedTokens: number;
+ /** The effective context-window size; absent when the basis has no limit. */
+ windowTokens?: number;
+}
+
+/** Session running totals of counted-once usage (tdd SS4.6.5). */
+export interface CumulativeTokenUsage {
+ /** Output tokens, session total. */
+ outputTokens: number;
+ /** Counted-once prompt tokens, session total. */
+ promptTokens: number;
+ /** Counted-once totals, session total. */
+ totalTokens: number;
+}
+
+/** The effective approval-mode projection (`EffectiveApprovalModeState`, tdd SS5.12): the same object `session/setApprovalMode` returns as `effectiveMode` and the `Session` object carries as `approvalMode`. */
+export interface EffectiveApprovalModeState {
+ /** The command that last set it; `null` when no command did. */
+ lastCommandId: string | null;
+ /** The mode in effect. */
+ mode: ApprovalMode;
+ /** How the mode took effect. */
+ source: ApprovalModeSource;
+}
+
+/** The latest effective-model fact in the snapshot (tdd SS4.9.1). */
+export interface EffectiveModel {
+ /** The selected model. */
+ modelId: string;
+ /** The selected provider; `null` when the selection names none. */
+ providerId: string | null;
+ /** What drove the selection. */
+ source: ModelChangeSource;
+}
+
+/** The optional `error.data` object (SS1.6). All members additive-optional; `kind` is always present when `data` is. */
+export interface ErrorData {
+ /** The next provable UTF-8 boundary on a misaligned text-media `item/readOutput` read (`-32602` `invalidParams`, FR-016b/D-17214-2): absent when no boundary is provable from the stored bytes ahead. */
+ alignedNextOffset?: number;
+ /** The rejected anchor value on `notFound`/`missingAnchor` and the `-32042` boundary arms (SS4.7.3, SS4.11); on `-32042` it is served as an explicit `null` when the request named no concrete anchor (spec 208 FM-005). */
+ anchor?: string | null;
+ /** Approval identity on SS5 errors. */
+ approvalId?: string;
+ /** The stored output's availability on `outputUnavailable` — the durable `ToolOutputAvailability` value, read-time-derived when the durable record still says `available` (SS4.5.5; spec 208 FM-008). */
+ availability?: string;
+ /** The missing capability, on `capabilityRequired` errors. Typed on the grantable registry, so `rawLog` is outside the v1 domain and joins it as an additive open-enum extension when SS6 un-defers (TEST-009). */
+ capability?: CapabilityName;
+ /** The configured command-admission bound, on `backpressured` errors. */
+ capacity?: number;
+ /** Rejected server-minted choice on `approvalChoiceInvalid`. */
+ choiceId?: string;
+ /** The rejected command's identifier, on `commandRejected` errors. The ratified v1 contract pairs it with `reason` (specs/13929-msp-activation/tdd.md SS3.6 admission-failure table and its `-32030` example), so a client can settle the exact command it sent without parsing the message string. */
+ commandId?: string;
+ /** Current stage token on `approvalRequirementStale`. */
+ currentRequirementId?: ApprovalRequirementRef;
+ /** SS1.5.1 descriptor, on `experimentalRequired` errors. */
+ descriptor?: string;
+ /** Free-form additive detail. */
+ details?: Record;
+ /** The oldest servable view position on `viewTruncated` (`-32040`, SS4.11); served as an explicit `null` when nothing before the head is servable — the null is present on the wire, never a dropped key (spec 208 FM-005 / Scenario 6.2). */
+ earliestCursor?: string | null;
+ /** The item whose stored output was requested, on the `item/readOutput` arms (`notFound`, `outputUnavailable`, and the misaligned-offset `invalidParams`). */
+ itemId?: string;
+ /** The stable camelCase category clients branch on. */
+ kind: ErrorKind;
+ /** Rejected inclusive fork boundary on `forkBoundaryInvalid`. */
+ lastTurnId?: string;
+ /** The latest installed boundary's view cursor on the `-32042` arms — always present in the `-32042` JSON and explicitly `null` when no boundary exists (SS4.11, FM-004). */
+ latestBoundaryCursor?: string | null;
+ /** The exceeded byte limit, on `inputTooLarge` errors. */
+ limitBytes?: number;
+ /** The requested `outputRef.id`, on the same `item/readOutput` arms. */
+ outputRef?: string;
+ /** Candidate retained paths on `sessionAmbiguous`. */
+ paths?: string[];
+ /** Failure detail vocabulary (e.g. `"missingAnchor"` on `notFound` for a missing view-cursor anchor). */
+ reason?: string;
+ /** Winning resolution on `approvalAlreadyResolved`. */
+ resolution?: ApprovalResolutionSummary;
+ /** Whether retrying can succeed (e.g. `overloaded`). When present, overrides the error table row's `retryable` default for this code. */
+ retryable?: boolean;
+ /** The rejected skill selector on `skillNotFound` (`-32032`, SS3.22.4). */
+ selector?: string;
+ /** Session identity on errors whose lookup is session-scoped. */
+ sessionId?: string;
+ /** Winning settlement on `userInputAlreadySettled`. */
+ settlement?: UserInputSettlementSummary;
+ /** User-input prompt identity on SS5.10 errors. */
+ userInputId?: string;
+ /** The blocked view position on `pageEventTooLarge` errors. */
+ viewCursor?: string;
+}
+
+/** A stable `error.data.kind` category (SS1.6): camelCase, the value clients branch on. Open: SS2–SS5 lanes add kinds additively as their methods land (Appendix B already registers them), and the spec's edge-case rule makes a new `kind` additive only because this domain is declared open. */
+export type ErrorKind =
+ | "parseError"
+ | "invalidRequest"
+ | "notInitialized"
+ | "alreadyInitialized"
+ | "methodNotFound"
+ | "invalidParams"
+ | "experimentalRequired"
+ | "internal"
+ | "pageEventTooLarge"
+ | "outputResultTooLarge"
+ | "overloaded"
+ | "inputTooLarge"
+ | "capabilityRequired"
+ | "notFound"
+ | "interrupted"
+ | "cancelled"
+ | "sessionNotFound"
+ | "sessionInUse"
+ | "sessionAmbiguous"
+ | "forkBoundaryInvalid"
+ | "sessionNotLoaded"
+ | "sessionStreamMismatch"
+ | "commandRejected"
+ | "backpressured"
+ | "skillNotFound"
+ | "viewTruncated"
+ | "outputUnavailable"
+ | "boundaryPruned"
+ | "boundaryUnusable"
+ | "noBoundary"
+ | "approvalNotFound"
+ | "approvalAlreadyResolved"
+ | "approvalChoiceInvalid"
+ | "approvalRequirementStale"
+ | "approvalReviewerUnavailable"
+ | "userInputNotFound"
+ | "userInputAlreadySettled"
+ | "userInputAnswerInvalid"
+ | (string & {});
+
+/** The `error` member of an error response (SS1.2 §2.4). */
+export interface ErrorObject {
+ /** Registry code (Appendix B). Typed as a plain integer on the wire; the value domain is the registry below (INV-018). */
+ code: number;
+ /** Structured detail; carries `kind` when present. */
+ data?: ErrorData;
+ /** Human-readable message. Never a branch point (SS1.6). */
+ message: string;
+}
+
+/** An error response frame (SS1.2 §2.4). Exactly one of `result` or `error` appears on a response; this type is the `error` half. */
+export interface ErrorResponse {
+ /** The error payload (Appendix B registry). */
+ error: ErrorObject;
+ /** Echo of the request id; `null` **only** for an unrecoverable parse error whose offending id could not be recovered (SS1.3). Always serialized, so `None` renders as `null` rather than being omitted — required-but-nullable (see [`require_nullable_id`]). */
+ id: RequestId | null;
+ /** The literal `"2.0"`. */
+ jsonrpc: JsonRpcVersion;
+}
+
+/** Where a fork cuts the source history (tdd SS2.5.3). Turn ids are used instead of counts because ids stay stable across compaction and concurrent appends while indices do not. */
+export interface ForkCutPoint {
+ /** The last completed turn to copy, inclusive. Naming an in-progress or unknown turn fails `forkBoundaryInvalid`. */
+ lastTurnId: string;
+}
+
+/** Fork provenance folded from the durable `session.fork.created` record (`ForkProvenance`, tdd SS2.4). */
+export interface ForkProvenance {
+ /** The `commandId` of the `session/fork` that created it. */
+ commandId: string;
+ /** An **opaque provenance string** preserved verbatim from the durable record. Display-only — not one of the SS6.2 cursor families: clients MUST NOT parse it and no method accepts it (tdd SS2.4). */
+ cutCursor: string;
+ /** Whether the fork named an explicit cut point. */
+ cutExplicit: boolean;
+ /** The source session this fork was cut from. */
+ sessionId: string;
+}
+
+/** The session goal block (tdd SS4.6.2, mirrors the runtime's goal state, camelCased). `status` and `percentComplete` are carried **verbatim** — out-of-contract status strings and >100 percents pass through; display clamping is the renderer's job. */
+export interface Goal {
+ /** Current work description, when present. */
+ currentWork?: string;
+ /** Next work description, when present. */
+ nextWork?: string;
+ /** The goal objective text. */
+ objective: string;
+ /** Percent complete, verbatim (>100 passes through). */
+ percentComplete: number;
+ /** Goal status, verbatim from the durable goal state (free string by design: out-of-contract values pass through). */
+ status: string;
+}
+
+/** `goal/clear` params (tdd SS3.18). An `objective` here is an unknown field and rejects `-32602 invalidParams` — the bare verbs carry exactly this pair. */
+export interface GoalClearParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The target session. */
+ sessionId: string;
+}
+
+/** The shared SS3.18 goal ack, admission-only: all five verbs answer this one shape (the tdd's "Shared contract"), differing only in when `turnId` is present. */
+export interface GoalCommandResult {
+ /** Echoes the client's id. */
+ commandId: string;
+ /** Admission status. */
+ status: CommandStatus;
+ /** Present by exactly the four SS3.18 result cases: an idle wake carries the fresh goal turn's id; a busy `set`/`edit`/`resume` carries the admission-time active turn's id (a routing fact, not a delivery promise); `pause`/`clear` never carry it; an idle admission whose resulting goal is not unfinished parks the notification and carries none. **Additive-optional**: absent means "no turn named", never fabricated. */
+ turnId?: string;
+}
+
+/** `goal/edit` params (tdd SS3.18): replace the current goal's objective. Same shape as `goal/set`; the verbs differ in their `missing_goal` precondition, not their payload. */
+export interface GoalEditParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The replacement objective; same trim/non-empty rule as `goal/set`. */
+ objective: string;
+ /** The target session. */
+ sessionId: string;
+}
+
+/** `goal/pause` params (tdd SS3.18); shape as `goal/clear`. */
+export interface GoalPauseParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The target session. */
+ sessionId: string;
+}
+
+/** `goal/resume` params (tdd SS3.18); shape as `goal/clear`. */
+export interface GoalResumeParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The target session. */
+ sessionId: string;
+}
+
+/** `goal/set` params (tdd SS3.18): set the session's goal objective. */
+export interface GoalSetParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The objective text; required, non-empty after Unicode-whitespace trim (the trimmed text is the payload). Empty-after-trim is `-32602 invalidParams` (tdd SS3.18). */
+ objective: string;
+ /** The target session. */
+ sessionId: string;
+}
+
+/** What history a lifecycle result actually served (tdd SS2.5.2). Open on the client side: report-what-was-served means a client treats an unknown mode as "page it yourself". */
+export type HistoryMode = "anchoredSnapshot" | "inline" | "snapshot" | "none" | (string & {});
+
+/** Why a result served `history.mode: "none"` — spec 208 FM-005's typed unavailability (tdd SS2.5.2; D-050). Open on the client side: an absent (older server) or unknown (newer server) value decodes conservatively as an unknown reason, and `viewCursor` text never substitutes for it (spec 208 INV-19734-1). */
+export type HistoryNoneReason =
+ | "excluded"
+ | "cursorSuffix"
+ | "historyBudget"
+ | "projectionUnavailable"
+ | "projectionReadLimit"
+ | (string & {});
+
+/** The `history` request preference of `session/resume` (tdd SS2.5.2). The forced values downgrade `anchored` → `inline` → `snapshot` → `none`; under `auto` the full rung order is anchoredSnapshot → inline → snapshot → elided snapshot → none. */
+export type HistoryPreference = "auto" | "inline" | "snapshot" | "anchored";
+
+/** Disposition when a turn is already running (tdd SS3.2). The wire default is `queue`: an SDK caller who has not looked at session state should not silently mutate an in-flight turn. */
+export type IfBusy = "queue" | "steer" | "replace";
+
+/** `initialize` request params (SS1.4.1). */
+export interface InitializeParams {
+ /** Capability posture; absent means all defaults. */
+ capabilities?: ClientCapabilities;
+ /** Client identification. */
+ clientInfo: ClientInfo;
+}
+
+/** The `initialize` result (SS1.4.1). */
+export interface InitializeResult {
+ /** Echo of the effective negotiated experimental setting. */
+ experimentalApi: boolean;
+ /** Subset of the requested capabilities, plus policy-implicit grants. Fixed for the connection lifetime (INV-009). */
+ grantedCapabilities: CapabilityName[];
+ /** Absolute path of the muse home directory. */
+ museHome: string;
+ /** Server runtime platform family. */
+ platformFamily: PlatformFamily;
+ /** Server operating system. */
+ platformOs: PlatformOs;
+ /** Envelope schema version and stable-surface fingerprint. */
+ schema: SchemaInfo;
+ /** Server identification. */
+ serverInfo: ServerInfo;
+ /** Whether this host persists its sessions (SS2.13). Optional so the addition is additive under SS1.5.4; a v1 host always sends it, and a client reads absent as `durable` because no server that omits it has the ephemeral profile. */
+ sessionDurability?: SessionDurability;
+ /** Exact user-agent string presented to upstream model providers. */
+ userAgent: string;
+}
+
+/** One transcript item at one revision (tdd SS4.4.1 common fields plus the per-kind fields of SS4.5.2–4.5.10, all optional and owned by the kind their doc names). `item/started`, `item/updated`, and `item/completed` carry the full object; `item/delta` appends to it by field path. */
+export interface Item {
+ /** `subagent`: agent definition path. */
+ agentPath?: string;
+ /** `toolCall`: the approval that gated this call (tdd SS5); join key for the approval view events. */
+ approvalId?: string;
+ /** `toolCall`: the model-authored argument JSON, **verbatim**; clients parse. Verbatim keeps the fold byte-deterministic and survives model-emitted almost-JSON (tdd SS4.5.5). */
+ args?: string;
+ /** `userMessage`: image attachment metadata only — base64 payloads are not echoed back on the view (tdd SS4.5.2). */
+ attachments?: MessageAttachment[];
+ /** `toolCall`: `true` once the task was durably backgrounded; delivered via `item/updated`. */
+ background?: boolean;
+ /** `toolCall`: who backgrounded the task; absent on pre-split records — never inferred (tdd SS4.5.5). */
+ backgroundInitiator?: BackgroundInitiator;
+ /** `toolCall`: the provider call id (`call_...`), opaque. */
+ callId?: string;
+ /** `subagent`/`reminderChild`: the child's own session id, readable via `session/read`/`view/page` — child transcript drill-down without a second protocol (tdd SS4.5.7). */
+ childSessionId?: string;
+ /** `reminderChild`: parent-session-dir-relative child log path; absent when no filesystem log. */
+ childSessionLogPath?: string;
+ /** `workflow`: folded per-child state, keyed by `(childId, attempt)`, re-emitted whole on every change — the item `revision` is the ordering guard (tdd SS4.5.8). */
+ children?: WorkflowChild[];
+ /** `userMessage`/`userShell`: the submitting command — multi-client UIs de-duplicate their local echo on it. */
+ commandId?: string;
+ /** `userShell`: the command text as submitted. */
+ commandText?: string;
+ /** `subagent`: camelCased `SubagentControlStatus` (open enum); `status` stays the generic item vocabulary. */
+ controlStatus?: SubagentControlStatus;
+ /** `subagent`: nesting depth. */
+ depth?: number;
+ /** `userMessage`: presentation form (tdd SS3.2); absent when the client sent none. */
+ displayText?: string;
+ /** `userShell`/`subagent`: observed wall-clock duration. */
+ durationMs?: number;
+ /** `workflow`: launched entry identity. */
+ entryId?: string;
+ /** `userShell`: the process exit code, when it exited by code. */
+ exitCode?: number;
+ /** `userShell`: the terminating signal NUMBER, when signalled (e.g. 9) — the durable payload verbatim; nothing maps numbers to names, and the fold never invents one. */
+ exitSignal?: number;
+ /** `toolCall`: machine-readable failure class (`TaskFailureKind`, snake_case verbatim — durable runtime vocabulary, the SS1.6 casing exemption). */
+ failureKind?: string;
+ /** `toolCall`/`subagent`: `Failed`/`Rejected`/`Cancelled` reason text, verbatim. */
+ failureReason?: string;
+ /** Server-provided one-line human summary any kind MAY carry, for generic rendering of kinds a client does not recognize; new kinds SHOULD carry it during their first release cycle (tdd SS4.10). */
+ fallbackText?: string;
+ /** `reminderChild`: the reminder generation. */
+ generationId?: number;
+ /** Bare UUIDv7; the item's identity across its whole lifecycle. Identity rule (tdd SS4.4.1): the task id for task-backed kinds (`toolCall`, `subagent`), the pre-minted commit `message_id` for delta-streamed kinds (`agentMessage`, `reasoning`), and the opening durable record's event id for everything else. Opaque to clients. */
+ itemId: string;
+ /** The item kind (open enum): clients MUST render unknown kinds generically — kind name plus `status` plus `fallbackText` (tdd SS4.10). */
+ kind: ItemKind;
+ /** `workflow`: the reconciled terminal message, set on completion. */
+ message?: string;
+ /** `toolCall`: rich content the model saw beyond text; base64 is not inlined on the view (tdd SS4.5.5). */
+ modelVisibleContent?: ModelVisibleContent[];
+ /** `subagent`: objective as spawned. */
+ objective?: string;
+ /** `compaction`: terminal only — folds installed/fallback status. */
+ outcome?: CompactionOutcome;
+ /** `toolCall`/`userShell`: stored-output reference; fetch the full bytes via `item/readOutput` (served by #208). */
+ outputRef?: OutputRef;
+ /** `toolCall`: stored structured-patch reference (`kind: "tool_patch"`, `mediaType: "application/json"`); the body is fetched via `item/readOutput` with `patchRef.id`, and the ref survives the SS2.5.2 elided-snapshot rung exactly like `outputRef` without ever being an elision trigger (tdd SS2.5.2, SS4.5.5; #33025). */
+ patchRef?: OutputRef;
+ /** `toolCall`: server-authored edit-family diff summary (#33025) — always beside `patchRef`; absent = no diff available (tdd SS4.5.5). */
+ patchSummary?: PatchSummary;
+ /** `reasoning`: provider reasoning item id (e.g. `rs_...`), for provider-side correlation. */
+ providerItemId?: string;
+ /** `compaction`: noop/failure reason, verbatim (snake_case durable vocabulary, e.g. `"no_compactable_history"`). */
+ reason?: string;
+ /** RFC3339 timestamp of the item's driving durable record. Absent on ephemeral-opened items until first durable re-emission (tdd SS4.4.1). */
+ recordedAt?: string;
+ /** `reminderChild`: the reminder agent's id. */
+ reminderAgentId?: string;
+ /** `subagent`: the result envelope from `ResultReady` (tdd SS4.5.7). */
+ result?: SubagentResult;
+ /** `workflow`: set on resumed launches. */
+ resumeFromRunId?: string;
+ /** `userMessage`: `true` after an accepted retract (tdd SS4.5.1); re-emitted via `item/updated`. */
+ retracted?: boolean;
+ /** Integer >= 1, strictly monotonic per item; apply rule is replace-iff-higher. `item/delta` never bumps it (tdd SS4.4.1). */
+ revision: number;
+ /** `subagent`: role as spawned. */
+ role?: string;
+ /** `workflow`: launched script identity. */
+ scriptId?: string;
+ /** Open enum; terminal = anything other than `"inProgress"`. Unknown values MUST be treated as terminal-unknown and rendered generically (tdd SS4.4.1). */
+ status: ItemStatus;
+ /** `userMessage`: `true` when injected mid-turn via `turn/steer` or `ifBusy: "steer"`; absent otherwise. */
+ steered?: boolean;
+ /** `compaction`: summarizer strategy (installed only). */
+ strategyId?: string;
+ /** `subagent`: durable child identity (`subagent_id`). */
+ subagentId?: string;
+ /** `compaction`: opaque provenance string naming the compaction boundary. A compaction-anchored read anchor since D-029 (2026-08-12): accepted by `session/resume` and `view/page` (wire shape and validation are the #208 lane's). Still opaque — clients relay it, never parse it (tdd SS4.5.10). */
+ summarizedThrough?: string;
+ /** `reasoning`: one entry per summary part; part *n* streams via `item/delta` field `"summary.n"` (part boundary = index change). */
+ summary?: string[];
+ /** `reminderChild`: the linked task id. */
+ taskId?: string;
+ /** `userMessage`: the prompt text as submitted. `agentMessage`: the accumulated reply, streamed via `item/delta` field `"text"`. `reasoning`: raw committed reasoning text where the provider exposes it (never streamed in v1, tdd SS4.5.4). */
+ text?: string;
+ /** `compaction`: token budget snapshot after, when measured. */
+ tokensAfter?: number;
+ /** `compaction`: token budget snapshot before, when measured. */
+ tokensBefore?: number;
+ /** `toolCall`: tool name. */
+ tool?: string;
+ /** `compaction`: what initiated the compaction. */
+ trigger?: CompactionTrigger;
+ /** `workflow`: camelCased `WorkflowLaunchTriggerSource`, verbatim (durable runtime vocabulary, e.g. `"modelProposal"`). */
+ triggerSource?: string;
+ /** `true` when the server's per-surface text budget saturated a streamed surface (`agentMessage.text`, `reasoning.summary[*]`, `toolCall.visibleOutput`, `userShell.visibleOutput`); the durable full text remains in the log (tdd SS4.5.4). */
+ truncated?: boolean;
+ /** The owning turn (== the submitting `commandId` for fresh turns, tdd SS3.1.4). `null` only for `userShell` — the one kind outside a turn (tdd SS4.5.6). */
+ turnId?: string | null;
+ /** `subagent`: **transitive** observed usage — the child and its own descendants; updated in place, absent until first observation; never folded into `session/tokenUsage.cumulative` (tdd SS4.6.5). */
+ usage?: TokenUsage;
+ /** `toolCall`/`userShell`: bounded transcript-visible result text (budget per tdd SS4.5.4); streams via `item/delta` field `"output"`. */
+ visibleOutput?: string;
+ /** `subagent`/`workflow`: the owning durable workflow run id (opaque string — not a UUID family). */
+ workflowRunId?: string;
+}
+
+/** `item/completed` params (tdd SS4.3): the item reached its terminal state — the authoritative final object. Always cites a durable `sourceRange` (tdd SS4.2). Clients MUST accept `item/completed` for an `itemId` they never saw `item/started` for (single-shot kinds; after a gap fill; tdd SS4.4.1). */
+export interface ItemCompletedParams {
+ /** The full item at its terminal revision. */
+ item: Item;
+ /** The owning session. */
+ sessionId: string;
+ /** The durable records this event folded from. */
+ sourceRange: SourceRange;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+}
+
+/** `item/delta` params (tdd SS4.3.1): a UTF-8-safe streaming append to an open item's field. Ephemeral-sourced by definition: this params object has **no** `sourceRange` member at all (spec 14653 INV-009 — the schema enforces the exemption). Deltas never bump `revision`. */
+export interface ItemDeltaParams {
+ /** The appended text; concatenation of a field path's deltas in cursor order equals that field's value on `item/completed` unless the surface saturated (spec 14653 INV-005). */
+ delta: string;
+ /** Dotted field path the append targets (`"summary.0"`, `"output"`, ...); absent means `"text"` (tdd SS4.3.1). */
+ field?: string;
+ /** The open item being appended to. */
+ itemId: string;
+ /** The owning session. */
+ sessionId: string;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+}
+
+/** The nine v1 item kinds (tdd SS4.5.2–4.5.10). Open: a new kind is additive evolution, and clients MUST render unknown kinds generically (tdd SS4.10). */
+export type ItemKind =
+ | "userMessage"
+ | "agentMessage"
+ | "reasoning"
+ | "toolCall"
+ | "userShell"
+ | "subagent"
+ | "workflow"
+ | "reminderChild"
+ | "compaction"
+ | (string & {});
+
+/** The `item/readOutput` content encoding (tdd SS4.7.4). Closed: text media is ALWAYS `utf8` and binary media `base64`; a third value would change the client's decode contract. */
+export type ItemReadOutputEncoding = "utf8" | "base64";
+
+/** `item/readOutput` params (tdd SS4.7.4): byte-ranged fetch of stored full output that the view truncated — the `outputRef` fetch path SS3.9 and SS4.5.5 owe. Read-only; works on loaded and unloaded sessions; no lease. */
+export interface ItemReadOutputParams {
+ /** The item whose stored output is fetched. */
+ itemId: string;
+ /** STORED bytes requested; default and max 6 MiB (tdd SS4.7.4). A value above the max is served at the max. */
+ lengthBytes?: number;
+ /** STORED-byte offset to start from; 0 when omitted. STORED bytes are a property of the output, not of a transport (tdd SS4.7.4). */
+ offsetBytes?: number;
+ /** The `outputRef.id` from the item (never the `uri`; the uri is display/provenance). */
+ outputRef: string;
+ /** The session the item belongs to. */
+ sessionId: string;
+}
+
+/** `item/readOutput` result (tdd SS4.7.4): one stored-byte page. */
+export interface ItemReadOutputResult {
+ /** STORED bytes served in THIS response (not the output's total; that is `outputRef.byteLen` on the item). The next page's `offsetBytes` is `offsetBytes + byteLen` — short-serving and advancing are separate, so paging never skips or double-reads a byte (tdd SS4.7.4). */
+ byteLen: number;
+ /** The served range, decoded per `encoding`. */
+ content: string;
+ /** How `content` encodes the stored bytes. */
+ encoding: ItemReadOutputEncoding;
+ /** `true` when this range reached the end of the stored output. */
+ eof: boolean;
+ /** The stored output's media type (e.g. `text/plain`). */
+ mediaType: string;
+ /** The STORED-byte offset this response actually served from. */
+ offsetBytes: number;
+}
+
+/** `item/started` params (tdd SS4.3): a new item opened on the transcript. `sourceRange` is absent when the item opens on an ephemeral record (the delta-streamed kinds); the item's authoritative open is re-stated by its durable-sourced `item/completed` (tdd SS4.2). */
+export interface ItemStartedParams {
+ /** The full item at revision 1. */
+ item: Item;
+ /** The owning session. */
+ sessionId: string;
+ /** The durable records this event folded from; absent on an ephemeral-sourced open (spec 14653 INV-009). */
+ sourceRange?: SourceRange;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+}
+
+/** Item status (tdd SS4.4.1). Open; terminal = anything other than `"inProgress"`, and unknown values are terminal-unknown, rendered generically. */
+export type ItemStatus =
+ | "inProgress"
+ | "completed"
+ | "failed"
+ | "cancelled"
+ | "rejected"
+ | "timedOut"
+ | (string & {});
+
+/** `item/updated` params (tdd SS4.4.2): an open item changed non-terminally in a way deltas cannot express — the full item re-emitted at a higher revision (apply rule: replace iff higher). */
+export interface ItemUpdatedParams {
+ /** The full item at a higher revision. */
+ item: Item;
+ /** The owning session. */
+ sessionId: string;
+ /** The durable records this event folded from. */
+ sourceRange: SourceRange;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+}
+
+/** The literal `"2.0"` every frame carries (SS1.2). */
+export type JsonRpcVersion = "2.0";
+
+/** `userMessage` image attachment metadata (tdd SS4.5.2): metadata only — the durable bytes live in the log and are reachable on the raw altitude. */
+export interface MessageAttachment {
+ /** Pixel height, when known. */
+ height?: number;
+ /** The image media type (e.g. `"image/png"`). */
+ mediaType: string;
+ /** Attachment type, `"image"` in v1 (free string: attachment vocabulary grows additively with the runtime's intake surface). */
+ type: string;
+ /** Pixel width, when known. */
+ width?: number;
+}
+
+/** One visible catalog row (tdd SS3.10). Catalog rows marked hidden never reach the wire, so a client cannot select one. */
+export interface ModelCatalogEntry {
+ /** Context limit; `null` when the catalog source declared nothing. */
+ contextLimit: number | null;
+ /** Cost block; `null` when the catalog source declared nothing. */
+ cost: ModelCost | null;
+ /** The row's catalog default. Optional only for decoding older hosts; a present value is never null and is always a member of `variants`. Absent under `"unknown"` (ADR 33400 D2). */
+ defaultReasoningEffort?: ReasoningEffort;
+ /** Description; `null` when the catalog source declared nothing. */
+ description: string | null;
+ /** Presentation label. */
+ displayLabel: string;
+ /** Marks the session's effective model when `sessionId` was supplied. May be false for every row — a client MUST NOT assume exactly one. */
+ isActive: boolean;
+ /** Marks the catalog's default row. May be false for every row. */
+ isDefault: boolean;
+ /** The selectable model id. */
+ modelId: string;
+ /** Output limit; `null` when the catalog source declared nothing. */
+ outputLimit: number | null;
+ /** Provider profile; `null` when the catalog source declared nothing. */
+ profileId: string | null;
+ /** Provider routing. */
+ providerId: string;
+ /** Described selectable tiers, a same-order subset of `variants`. Optional only for decoding older hosts; a present value is never null. Absent under `"unknown"` (ADR 33400 D2). */
+ reasoningEffortVariants?: ModelDescribedReasoningEffort[];
+ /** Release date; `null` when the catalog source declared nothing. */
+ releaseDate: string | null;
+ /** Complete ordered selectable efforts. Optional only for decoding older hosts; a present value is never null. Current hosts always send it. */
+ variants?: ModelReasoningEffortVariants;
+}
+
+/** Where a model catalog came from (tdd SS3.10). **Open**: an unrecognized value is an unknown source, not an error. */
+export type ModelCatalogSource =
+ | "providerCatalog"
+ | "fakeCatalog"
+ | "unresolvedCatalog"
+ | "bundledCatalog"
+ | "configCatalog"
+ | (string & {});
+
+/** What drove a model selection (tdd SS4.6.1). Open. */
+export type ModelChangeSource = "user" | "default" | "policy" | (string & {});
+
+/** Per-1M-token catalog cost, carried **verbatim** for display and never rounded or re-formatted by the host (tdd SS3.10). Cost arithmetic stays client-local view math. */
+export interface ModelCost {
+ /** Cached-input cost, a decimal string. */
+ cached: string;
+ /** Currency; nullable — today's catalogs are USD. */
+ currency: string | null;
+ /** Input cost, a decimal string. */
+ input: string;
+ /** Output cost, a decimal string. */
+ output: string;
+}
+
+/** One described reasoning-effort tier of a `model/list` row (tdd SS3.10, ADR 33400 D2): a selectable tier plus the catalog's display string for it when declared. */
+export interface ModelDescribedReasoningEffort {
+ /** The catalog's per-tier display string; absent when the catalog declared none. Optional only for decoding; a present value is never null. */
+ description?: string;
+ /** The tier, in the closed D-024 vocabulary. */
+ tier: ReasoningEffort;
+}
+
+/** `model/list` params (tdd SS3.10): the discovery half of the model-picker gesture. **A query, not a command** — no `commandId`, no durable intake record, no view event. */
+export interface ModelListParams {
+ /** When present, the row matching that session's effective model is flagged `isActive`. When absent, no row is active — a client may list before it has a session (tdd SS3.10). */
+ sessionId?: string;
+}
+
+/** `model/list` result (tdd SS3.10). A snapshot at call time: v1 has no catalog subscription. `models` MAY be empty — a build shipped with no bundled models is a supported configuration. */
+export interface ModelListResult {
+ /** Visible rows only, newest `releaseDate` first. */
+ models: ModelCatalogEntry[];
+ /** The catalog's profile; `null` when none. */
+ profileId: string | null;
+ /** The catalog's provider. */
+ providerId: string;
+ /** Where the catalog came from — how a client tells a live provider catalog from a test fake and labels it honestly. */
+ source: ModelCatalogSource;
+}
+
+/** A complete ordered effort set, or an explicit unknown capability. */
+export type ModelReasoningEffortVariants = ReasoningEffort[] | UnknownModelReasoningEffortVariants;
+
+/** A model selection (tdd SS3.8). Empty strings are normalized to absent. */
+export interface ModelSelection {
+ /** Presentation label. */
+ displayLabel?: string;
+ /** Catalog model id. Required. */
+ modelId: string;
+ /** Provider profile. Omitted and explicit `null` both mean "no profile" (#23468). */
+ profileId?: string | null;
+ /** Provider routing. */
+ providerId?: string;
+}
+
+/** Rich content the model saw beyond text (tdd SS4.5.5, `ModelVisibleToolContent`): metadata only — fetch bytes via `item/readOutput` when an `outputRef` exists. */
+export interface ModelVisibleContent {
+ /** Pixel height, when known. */
+ height?: number;
+ /** The content media type. */
+ mediaType: string;
+ /** The recorded content path. */
+ path: string;
+ /** The tool that produced the content. */
+ sourceToolName: string;
+ /** Content type, `"image"` in v1 (free string, grows with the durable vocabulary). */
+ type: string;
+ /** Pixel width, when known. */
+ width?: number;
+}
+
+/** A notification frame, either direction (SS1.2 §2.2). No `id`; a notification is never answered. */
+export interface Notification {
+ /** Emission time in Unix milliseconds, recorded once at emission; server→client notifications only (SS1.2.5). Optional on the wire so decoders tolerate older servers. */
+ emittedAtMs?: number;
+ /** The literal `"2.0"`. */
+ jsonrpc: JsonRpcVersion;
+ /** Notification method name. */
+ method: string;
+ /** Method-specific parameters; omitted entirely when empty. */
+ params?: Record;
+}
+
+/** Stored-output reference (tdd SS4.5.5): the camelCased fold of the durable `ToolOutputRef`. The fetch path is `item/readOutput` (#208). */
+export interface OutputRef {
+ /** Whether the bytes are servable (tdd SS4.5.5). */
+ availability: OutputRefAvailability;
+ /** Stored byte length. */
+ byteLen: number;
+ /** Content digest (e.g. `"sha256:..."`), when recorded. */
+ digest?: string;
+ /** The stored output's durable id. */
+ id: string;
+ /** The stored output's kind, verbatim durable vocabulary (e.g. `"tool_output"`; snake_case per the SS1.6 casing exemption). */
+ kind: string;
+ /** Media type, when recorded. */
+ mediaType?: string;
+ /** Stored path, when recorded. */
+ path?: string;
+ /** The stored output's URI. */
+ uri: string;
+}
+
+/** Whether a stored output's bytes are servable (tdd SS4.5.5). Open — durable runtime vocabulary may grow additively. */
+export type OutputRefAvailability =
+ | "available"
+ | "missing"
+ | "unsupported"
+ | "accessFailed"
+ | (string & {});
+
+/** Server-authored edit-family diff summary (tdd SS4.5.5, #33025): `files` counts the stored patch document's file entries; `added` and `removed` are the total `+`/`-` prefixed LINE counts summed over the stored patch's hunks across all files — line counts, never hunk or byte counts. Rides the `toolCall` item beside `patchRef`; the body is fetched via `item/readOutput` with `patchRef.id`. */
+export interface PatchSummary {
+ /** Total `+`-prefixed line count across all files' hunks. */
+ added: number;
+ /** File entries in the stored patch document. */
+ files: number;
+ /** Total `-`-prefixed line count across all files' hunks. */
+ removed: number;
+}
+
+/** A pending approval in the snapshot: the SS2.5.2 pointer shape plus the gated `itemId` when one exists (tdd SS4.9.1). */
+export interface PendingApprovalPointer {
+ /** The pending approval's id. */
+ approvalId: string;
+ /** The parked item, when one exists. */
+ itemId?: string;
+ /** The cursor the approval opened at. */
+ viewCursor: string;
+}
+
+/** The `pendingRequests` discriminator (tdd SS2.5.2). Open enum, v1 values `approval` and `userInput`. */
+export type PendingRequestKind = "approval" | "userInput" | (string & {});
+
+/** A late-joiner pointer at an unsettled server-initiated request (tdd SS2.5.2, SS2.2.1). The full payloads arrive as re-issued server-to-client requests right after a `session/resume` response (tdd SS5.6); `session/read` never re-issues them (tdd SS2.5.5). **A second E4 instance, RULED with E4 (#22785, owner, 2026-08-26): the flat discriminated-object precedent is accepted for this type too, on the `ApprovalSubject` precedent, with the serialized JSON unchanged. A strict union node kind may be funded later; if it is, it must cover both this type and `TurnInputPart`.** SS2.5.2 ratifies two kind-discriminated entry shapes (`{kind: "approval", approvalId, viewCursor}` / `{kind: "userInput", userInputId, viewCursor}`); this is one flat object with both ids optional, so the published schema accepts `{"kind":"approval","userInputId":…}` and an entry carrying no id at all. The v1 model names no object-variant union (the `ApprovalSubject` precedent, followed for `TurnInputPart`), and this instance differs from that one in a way the ruling should see: `kind` here is an OPEN enum, where `TurnInputPart.type` is closed. */
+export interface PendingRequestPointer {
+ /** Present on an `approval` entry. */
+ approvalId?: string;
+ /** The discriminator; v1 values `approval` and `userInput`. */
+ kind: PendingRequestKind;
+ /** Present on a `userInput` entry. */
+ userInputId?: string;
+ /** The cursor the request opened at. */
+ viewCursor: string;
+}
+
+/** A pending user-input prompt in the snapshot (tdd SS4.9.1, SS5.10). */
+export interface PendingUserInputPointer {
+ /** The parked item, when one exists. */
+ itemId?: string;
+ /** The pending prompt's id. */
+ userInputId: string;
+ /** The cursor the prompt opened at. */
+ viewCursor: string;
+}
+
+/** The server runtime's platform family (SS1.4.1); may differ from the client's. Closed: SS1.4.1 fixes the value set, so widening it is a deliberate, gate-visible protocol change rather than a silent addition (a later `Closed`→`Open` flip is itself additive, data-model.md §5.2). */
+export type PlatformFamily = "unix" | "windows";
+
+/** The server's operating system (SS1.4.1). Closed, for the same reason as [`PlatformFamily`]. */
+export type PlatformOs = "macos" | "linux" | "windows";
+
+/** The reasoning-effort tier sampled at submission (tdd SS3.2, SS3.3). The **same closed tier vocabulary** on both the fresh-turn and steer lanes, spelled identically; invalid tiers are invalid params. `none` is a tier of the vocabulary (ask for no reasoning), not a way to say "unset". */
+export type ReasoningEffort =
+ | "none"
+ | "minimal"
+ | "low"
+ | "medium"
+ | "high"
+ | "xhigh"
+ | "max"
+ | "ultra";
+
+/** What drove a reasoning-effort default change (tdd SS4.6.9). Open; v1's only producer is `user` (an accepted `session/setReasoningEffort`). */
+export type ReasoningEffortChangeSource = "user" | "default" | "policy" | (string & {});
+
+/** The snapshot's standing session-default reasoning effort (tdd SS4.9.1, ADR 31255 D1): the fold of the latest completed `runtime.reasoning_effort_reconfigure` fact — the same pair `session/reasoningEffortChanged` carries. */
+export interface ReasoningEffortState {
+ /** The standing default tier — the closed SS3.2 vocabulary, spelled identically to `turn/start.reasoningEffort`. */
+ reasoningEffort: ReasoningEffort;
+ /** Which actor class set the default. */
+ source: ReasoningEffortChangeSource;
+}
+
+/** One end of a [`SourceRange`]: a record's event id and its sequence number within the stream (tdd SS4.2). */
+export interface RecordPosition {
+ /** The record's event id. */
+ id: string;
+ /** The record's sequence number within its stream. */
+ sequence: number;
+}
+
+/** A request frame, either direction (SS1.2 §2.1). */
+export interface Request {
+ /** Client-chosen id, unique among that client's in-flight requests. */
+ id: RequestId;
+ /** The literal `"2.0"`. */
+ jsonrpc: JsonRpcVersion;
+ /** Slash-namespaced camelCase method name. */
+ method: string;
+ /** Method-specific parameters; omitted entirely when empty, never `null`. */
+ params?: Record;
+ /** W3C trace passthrough (SS1.8); requests only. */
+ trace?: TraceContext;
+}
+
+/** A request id (SS1.3): client-chosen string or integer. `1` and `"1"` do not compare equal; each direction owns its own id space. */
+export type RequestId = number | string;
+
+/** The SS5.3.3 presentation receipt — the client's response to a server-initiated request (`approval/request`, `userInput/request`). The response acknowledges presentation only ("a surface showed or will show this"): it changes no state, the server uses it for diagnostics alone, and the decision/answer travels as a command (`approval/decide`, `userInput/answer`). An error response or a dropped connection means this connection could not present the request; the approval or prompt stays pending and the request is re-issued on the next subscribe (SS5.6). There is no dismiss-without-deciding on the wire. */
+export interface RequestReceipt {}
+
+/** The `schema` pair in [`InitializeResult`] (SS1.4.1, SS1.5.3). `version` is the wire **envelope** schema version — distinct from the session-view `schemaVersion`, the raw-log `schema_version`, and the 0.x/1.0 stability posture, which is not on the wire at all (INV-006a). */
+export interface SchemaInfo {
+ /** `sha256:<64 lower hex>` content hash of this server binary's stable-surface bundle (INV-003). A mismatch is a warning condition, not an error (SS1.4.1). */
+ fingerprint: string;
+ /** Envelope schema version; `1` in v1, expected to stay `1` for a long time (SS1.4.1). */
+ version: number;
+}
+
+/** Server identification inside [`InitializeResult`]. */
+export interface ServerInfo {
+ /** Server name. */
+ name: string;
+ /** Server version string. */
+ version: string;
+}
+
+/** The session object every lifecycle method returns or lists (tdd SS2.4). Additive-optional evolution applies: clients must ignore unknown fields. */
+export interface Session {
+ /** The `turnId` of the current foreground turn when `status` is `running`, and `null` when the session is idle (tdd SS2.4). **Required-nullable, per the owner ruling on #22946** ("approve required-nullable", review comment `r3863946961`, 2026-08-26). Both production writers hard-code `"activeTurnId": null` (`session/start/commit_load.rs` for `session/start`, `session/snapshot.rs` feeding resume/read/list/fork) and nothing strips it, so this is what the binary emits and what SS2.4's example spells. The optional-absent shape published it as plain `string` and REJECTED every idle `Session` frame the host sent — the #19923 defect class this PR exists to close. E5's original evidence for optional-absent ("every committed transcript shows the omission") was wrong: those transcripts are hand-authored fixtures, not host recordings. They are corrected in the same change under the ruling's SS1.5 `regenerationJustification`. */
+ activeTurnId: string | null;
+ /** The folded effective approval mode. **Additive-optional**: a Session object that omits it means the host has not folded a mode, which is why the index-derived `session/list` entry may legitimately omit it (tdd SS2.4, SS5.12). */
+ approvalMode?: EffectiveApprovalModeState;
+ /** Attention flags (tdd SS2.4, ADR 31983 D3). **Additive-optional**, present only when at least one flag is set; absence is a NON-assertion (nothing pending, or the loaded session's pending source declined to answer). Loaded sessions only: a `notLoaded` row omits it even while its durable pending set is non-empty. */
+ attention?: AttentionFlag[];
+ /** Derived workspace branch (tdd SS2.14.1, #27598) — the index's last derived value; the live-change signal stays `session/branchChanged` (SS4.6.4). **Additive-optional**, omitted when underivable. */
+ branch?: string;
+ /** RFC3339. For a fork this is the fork session id's UUIDv7 mint instant (tdd SS2.4). */
+ createdAt: string;
+ /** Derived first-user-prompt preview (tdd SS2.14.1, #27598). **Additive-optional**, omitted when underivable. */
+ firstUserPrompt?: string;
+ /** `null` for root sessions; fork provenance otherwise (tdd SS2.4). */
+ forkedFrom: ForkProvenance | null;
+ /** Content-activity recency, RFC3339 (tdd SS2.4, ADR 31983 D5). **Additive-optional**: omitted when no content record exists. Never advanced by lifecycle bookkeeping (the resume marker, re-stamps) or a fork's copied seed-replay records, and never precedes `createdAt`. */
+ lastActivityAt?: string;
+ /** The winning metadata fold's model; `null` when that record omits it. */
+ modelId: string | null;
+ /** The durable allocated session name (tdd SS2.4/SS2.14.1, #27598; ADR 27598 D2/D4). **Additive-optional**: present when the serving path holds an allocated name, omitted otherwise — absent is never fabricated. Authoritative and renameable via `session/rename`. */
+ name?: string;
+ /** Absolute path of the session's durable log; non-nullable. Under the ephemeral session profile it is the **empty string**, meaning "no durable log exists" (tdd SS2.13.2) — the one value a client must not hand to a filesystem call. */
+ path: string;
+ /** The winning metadata fold's provider; `null` when that record omits it. */
+ providerId: string | null;
+ /** The session identity. */
+ sessionId: string;
+ /** Load state as this host knows it; `session/list` reports `notLoaded` for sessions loaded by *other* hosts (tdd SS2.4). */
+ status: SessionStatus;
+ /** Derived display title (tdd SS2.14.1, #27598): a heuristic that may evolve — its carriage, not its derivation, is the contract. **Additive-optional**, omitted when underivable. */
+ title?: string;
+ /** Completed-turn count from the session view fold (tdd SS2.4). */
+ turnCount: number;
+ /** RFC3339; never precedes `createdAt` (tdd SS2.4). */
+ updatedAt: string;
+ /** The winning metadata fold's workspace root; `null` when that record omits it — absent is never fabricated (tdd SS2.4). */
+ workspaceRoot: string | null;
+}
+
+/** `session/approvalModeChanged` params (tdd SS5.12): the fold of the durable approval-mode reconfigure audit fact — every accepted change writes one; a mode flip without an audit fact is a runtime bug by design. */
+export interface SessionApprovalModeChangedParams {
+ /** The requesting client's `clientInfo.name` (tdd SS1.4.1), recorded on the audit fact. */
+ clientName: string;
+ /** The command that changed it. */
+ commandId: string;
+ /** The mode now in effect. */
+ mode: ApprovalMode;
+ /** The owning session. */
+ sessionId: string;
+ /** How the mode took effect. */
+ source: ApprovalModeSource;
+ /** The durable records this event folded from. */
+ sourceRange: SourceRange;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+}
+
+/** `session/branchChanged` params (tdd SS4.6.4): a durable workspace-branch observation landed. */
+export interface SessionBranchChangedParams {
+ /** The observed branch; `null` on a detached-HEAD observation — a fact, not "unchanged" (tdd SS4.6.4). */
+ branch?: string;
+ /** The owning session. */
+ sessionId: string;
+ /** The durable records this event folded from. */
+ sourceRange: SourceRange;
+ /** The detected version-control system; absent when no repository was detected. */
+ vcs?: Vcs;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+ /** The observed workspace root. */
+ workspaceRoot: string;
+}
+
+/** `session/closed` params (tdd SS2.6.2; enrolled by #33065): a loaded session was unloaded from this host, broadcast to every initialized connection. After it, the session is `notLoaded`; the log remains on disk and `session/resume` reloads it. A crash emits nothing — only the two orderly unload paths do, and both write the durable `SessionEnd` record first. */
+export interface SessionClosedParams {
+ /** Which orderly unload path fired. */
+ reason: SessionClosedReason;
+ /** The unloaded session. */
+ sessionId: string;
+ /** The final view head; a client that stores it can later `session/resume {cursor}` and receive exactly the (empty) suffix. An **opaque** view cursor: clients relay it, never parse it (tdd SS4.1). **Required-nullable**: the producers always write the member and write `null` when the final fold failed at unload (`session/idle.rs`, `serve/shutdown.rs`; PR #16779 review) — the host defines no cursor values of its own and never invents one, and the subscriber still learns the session closed. */
+ viewCursor: string | null;
+}
+
+/** The SS2.6.2 closed-reason vocabulary. Server-produced and published OPEN by owner ruling — the #33065 menu-B pick (PR #33201 comment 5638727249, recorded in the enrollment decision record), which settles that this notification reason enum publishes open rather than resting on E2's result-vocabulary rule by analogy. A crash is deliberately not a reason, because a crash emits no notification at all. */
+export type SessionClosedReason = "idle" | "hostShutdown" | (string & {});
+
+/** `session/compact` params (tdd SS3.7): manually compact the session's conversation context — the `/compact` gesture. Compaction runs asynchronously; the ack is admission only. */
+export interface SessionCompactParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The target session. */
+ sessionId: string;
+ /** The run whose context to compact. Omit and the server resolves the session's current/latest run; a session with no resolvable run rejects with `commandRejected` reason `missing_run` (tdd SS3.7). Any syntactically valid UUID: a turn from an older session may carry a v4 or v5 id. A malformed id is `invalidParams`. */
+ turnId?: string;
+}
+
+/** `session/compact` result (tdd SS3.7). Failures *after* admission (`summarizer_failed`, `install_rejected`, `cancelled`) are not wire errors — they arrive as the compaction's terminal view event. */
+export interface SessionCompactResult {
+ /** Echoes the client's id. */
+ commandId: string;
+ /** Why the command was a noop, e.g. `no_compactable_history`. Present on a `noop` status (tdd SS3.7). */
+ reason?: string;
+ /** Admission status, or `noop`. */
+ status: CompactStatus;
+}
+
+/** The open configuration extension object shared by `session/start` and `session/resume` (ADR 32760 D1). Unknown keys are ignored on the wire, never rejected (tdd SS1.5.4, spec 206 INV-015; D-052 resolving [#23456](https://github.com/mslsrc/tbh/issues/23456)): the live decoder is D-042's tolerant path, and TEST-024 keeps every exported bundle free of `additionalProperties: false`. The Rust typed model's `deny_unknown_fields` is internal and never exported — the #22785 E6b closedness export applies nowhere, and the `x-msp-closed` opt-in mechanism stays inert. Recognized `mcpServers` values are typed and validated before they leave the wire boundary. */
+export interface SessionConfig {
+ /** Native MCP servers added only to this session runtime. */
+ mcpServers?: Record;
+}
+
+/** `session/contextUsage` params (tdd SS4.6.6, #14405): context-window pressure — the counted-once occupancy at the latest provider-reported durable fact, joined with the host's pressure basis. Replace wholesale; emitted only when the `(windowTokens, usedTokens, pressure)` triple changes value (identical adoptions emit nothing). */
+export interface SessionContextUsageParams {
+ /** Server-computed pressure level over the basis thresholds. */
+ pressure: ContextPressureLevel;
+ /** The owning session. */
+ sessionId: string;
+ /** The durable records this event folded from. */
+ sourceRange: SourceRange;
+ /** Counted-once prompt tokens (#8803) plus output tokens of the driving record, saturating — the honest occupancy floor. */
+ usedTokens: number;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+ /** The effective context-window size from the host's pressure basis; absent when the basis has no limit — the limit part is omitted, never invented (tdd SS4.6.6). */
+ windowTokens?: number;
+}
+
+/** The persisted deletion terminal, separate from admission (SS3.24). The shared schema is one object. Actual failed producers send both optional fields; completed producers omit both. Clients enforce those obligations before interpreting a known outcome. Preserve unknown strings without treating them as successful completion. */
+export interface SessionDeleteCompletedParams {
+ /** Idempotency key of the original deletion command. */
+ commandId: string;
+ /** Deletion result; an unknown value leaves the command pending. */
+ outcome: SessionDeleteOutcome;
+ /** Erasure evidence for a failed result; omitted for a completed result. */
+ physicalChange?: SessionDeletePhysicalChange;
+ /** Required for a failed result and omitted for a completed result. */
+ reason?: SessionDeleteFailureReason;
+ /** Session named by the original deletion command. */
+ sessionId: string;
+}
+
+/** Stable deletion-failure vocabulary known to this version (SS3.24). The server emits only these values. Future reason strings remain an open result vocabulary; consumers cannot infer completion from any reason. */
+export type SessionDeleteFailureReason =
+ | "ownershipUnavailable"
+ | "sharedSource"
+ | "writerBusy"
+ | "unsafeSource"
+ | "sourceChanged"
+ | "quiescenceFailed"
+ | "cancelled"
+ | "storageFailure"
+ | "cleanupIncomplete"
+ | "unsupportedLayout"
+ | (string & {});
+
+/** Known terminal outcomes. A future outcome cannot authorize success or exit. */
+export type SessionDeleteOutcome = "completed" | "failed" | (string & {});
+
+/** `session/delete` params. The host validates a non-nil legacy-valid UUID target and a UUID-v7 command identity before admission. Unknown members are ignored and do not enter the normalized command identity (SS1.5.4). */
+export interface SessionDeleteParams {
+ /** UUID-v7 idempotency key for this deletion command. */
+ commandId: string;
+ /** Non-nil UUID of the session selected for deletion. */
+ sessionId: string;
+}
+
+/** The failed attempt's immutable snapshot of persisted physical evidence. `possible` is recorded before a detach/unlink, `confirmed` after a proved owned effect. A failure never resets that evidence merely because the session path is absent. Unknown strings remain representable; consumers must treat them conservatively as `possible`. */
+export type SessionDeletePhysicalChange = "none" | "possible" | "confirmed" | (string & {});
+
+/** Whether this host writes its sessions to disk (SS1.4.1, SS2.13). A property of the host process, fixed at construction and identical for every session and every connection it serves — never requested, granted, or negotiated, which is why it is not a capability. Open: the unrepresented degraded state (#14401) has candidate resolutions that add a third value here, so closed would make that a breaking change. */
+export type SessionDurability = "durable" | "ephemeral" | (string & {});
+
+/** `session/fork` params (tdd SS2.5.3). */
+export interface SessionForkParams {
+ /** The SS2.5 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** Copy history through a completed turn, inclusive. Omitted means "all completed turns" (tdd SS2.5.3). */
+ cutPoint?: ForkCutPoint;
+ /** Skip inline history in the result and page it later — same as `session/resume` (tdd SS2.5.3). */
+ excludeItems?: boolean;
+ /** The source session. */
+ sessionId: string;
+}
+
+/** `session/fork` result (tdd SS2.5.3): the `session/resume` envelope for the **new** session, whose `session.forkedFrom` carries the provenance. */
+export interface SessionForkResult {
+ /** The served history. */
+ history: SessionHistory;
+ /** The late-joiner pointer set. */
+ pendingRequests: PendingRequestPointer[];
+ /** The new fork session, carrying `forkedFrom` provenance. */
+ session: Session;
+ /** The new session's view head. */
+ viewCursor: string;
+}
+
+/** `session/goalChanged` params (tdd SS4.6.2): the projected goal block's value changed — identical adoptions emit nothing (the change gate), and an explicit `null` clears. Replace wholesale; `null` never means unchanged. */
+export interface SessionGoalChangedParams {
+ /** The full current goal block, or `null` to clear. */
+ goal?: Goal;
+ /** The owning session. */
+ sessionId: string;
+ /** The durable records this event folded from. */
+ sourceRange: SourceRange;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+}
+
+/** The `history` envelope shared by `session/resume`, `session/fork`, and `session/read` (tdd SS2.5.2). */
+export interface SessionHistory {
+ /** The full folded item array when `mode` is `inline`; `null` otherwise. */
+ items: Item[] | null;
+ /** What was actually served — never what was asked for (tdd SS2.5.2). */
+ mode: HistoryMode;
+ /** Why no history was served — sent exactly when `mode` is `"none"` (tdd SS2.5.2; D-050, spec 208 INV-19734-1). */
+ noneReason?: HistoryNoneReason;
+ /** The folded view state when `mode` is `snapshot` or `anchoredSnapshot`; `null` otherwise. */
+ snapshot: ViewSnapshot | null;
+}
+
+/** `session/listChanged` params (#33084, ADR 33084 D3): one changed row of the `session/list` shape — the full SS2.4 Session object as the answering host's list face serves it at emission (the ADR 29243 live-overlaid row), a replace, never a delta. Emitted only on connections that negotiated the `sessionListStream` capability at `initialize` (ADR 33084 D2); row birth stays on `session/started`, unload pairs with `session/closed`. */
+export interface SessionListChangedParams {
+ /** The served list row for the changed session. */
+ session: Session;
+}
+
+/** `session/list` params (tdd SS2.5.4). Read-only; never touches leases. */
+export interface SessionListParams {
+ /** Opaque page cursor from a prior result. Page cursors are a distinct opaque-string family from view cursors and stream cursors, valid only for re-issuing the same listing (tdd SS2.5.4). Omitted and explicit `null` both mean "first page" (#23468). */
+ cursor?: string | null;
+ /** Page size; default 50, max 200 — the cap is published under #22785 E6c (owner-ruled 2026-08-26). Maximum 200. */
+ limit?: number;
+ /** Only sessions with log activity after this RFC3339 instant. */
+ updatedAfter?: string;
+ /** Only sessions whose metadata workspace root equals this path. */
+ workspaceRoot?: string;
+}
+
+/** `session/list` result (tdd SS2.5.4). Ordering is `updatedAt` descending. */
+export interface SessionListResult {
+ /** The next page's cursor; `null` on the last page. */
+ nextCursor: string | null;
+ /** The page of stored sessions. */
+ sessions: Session[];
+}
+
+/** One native MCP server supplied at session construction (ADR 32760 D1). **Closed union** (#33295 owner ruling A1, extending D-033/D-050 to `oneOf`): a validator MUST reject an undeclared `transport` arm — the server fails `session/start` decode on an unknown transport, and a future transport arrives as an explicit schema addition. */
+export type SessionMcpServerConfig =
+ | {
+ /** Ordered child arguments. */ args?: string[];
+ /** Executable name or path. Configuration diagnostics never echo it. */ command: string;
+ /** Explicit child environment additions. */ env?: Record;
+ /** Stdio framing mode; defaults to automatic detection. */ framing?: SessionMcpStdioFraming;
+ /** Required/optional startup posture; defaults to required. */ mode?: SessionMcpServerMode;
+ transport: "stdio";
+ }
+ | {
+ /** Explicit request headers. */ headers?: Record;
+ /** Required/optional startup posture; defaults to required. */ mode?: SessionMcpServerMode;
+ transport: "streamableHttp";
+ /** HTTP(S) endpoint. Configuration diagnostics never echo it. */ url: string;
+ };
+
+/** Startup failure posture for a session MCP server. */
+export type SessionMcpServerMode = "required" | "optional";
+
+/** Stdio framing choices exposed by session MCP configuration. */
+export type SessionMcpStdioFraming = "auto" | "contentLength" | "lineDelimitedJson";
+
+/** `session/modelChanged` params (tdd SS4.6.1): a durable model-selection record landed (tdd SS3.8). */
+export interface SessionModelChangedParams {
+ /** The selected model. */
+ modelId: string;
+ /** The selected provider; `null` when the selection names none. */
+ providerId?: string;
+ /** The owning session. */
+ sessionId: string;
+ /** What drove the selection. */
+ source: ModelChangeSource;
+ /** The durable records this event folded from. */
+ sourceRange: SourceRange;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+}
+
+/** `session/modelRouteUnserved` params (#25603, ADR 25603 D1, spec 5469 Amendment 16): an accepted `login.credential_update` installed a provider that cannot serve the session's STANDING model route. Disclosure only — the standing selection is unchanged (no `session/modelChanged` fires) and the repair path is a routable `session/setModel`. Folded from the durable `runtime.provider_reconfigure.standing_route_unserved` record; additive — clients that predate it skip the unknown method. */
+export interface SessionModelRouteUnservedParams {
+ /** The command whose accepted swap installed the provider. */
+ commandId: string;
+ /** The provider id the swap installed. */
+ installedProviderId: string;
+ /** The standing (still bound, now unroutable) model. */
+ modelId: string;
+ /** The standing model's provider; `null` when the selection names none. */
+ providerId?: string;
+ /** The owning session. */
+ sessionId: string;
+ /** The durable records this event folded from. */
+ sourceRange: SourceRange;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+}
+
+/** `session/nameChanged` params (tdd SS4.6.7, #27598): the fold of ANY durable session-name record — the FIRST-NAMING automatic allocate as well as an accepted `session/rename` (or the same in-process runtime command). Replace-wholesale like every SS4.6 sibling. */
+export interface SessionNameChangedParams {
+ /** The new canonical name now in effect. */
+ name: string;
+ /** The owning session. */
+ sessionId: string;
+ /** The durable records this event folded from. */
+ sourceRange: SourceRange;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+}
+
+/** `session/read` params (tdd SS2.5.5): read one stored session **without attaching** — no writer lease, no load, no subscription, no `SessionResumed` record. */
+export interface SessionReadParams {
+ /** Metadata-only unless you ask: `false` carries the folded item history. Same name and polarity as `session/resume`/`session/fork`; only the default differs — here it is `true` (tdd SS2.5.5). */
+ excludeItems?: boolean;
+ /** The session to read. */
+ sessionId: string;
+}
+
+/** `session/read` result (tdd SS2.5.5). The `viewCursor` is the fold head at read time — a point-in-time read, immediately stale if a foreign host is appending. */
+export interface SessionReadResult {
+ /** The served history. */
+ history: SessionHistory;
+ /** The same pointer shape as `session/resume`. Because `session/read` never subscribes this is a point-in-time log read only: no requests are re-issued after it (tdd SS2.5.5). */
+ pendingRequests: PendingRequestPointer[];
+ /** The session as folded point-in-time. */
+ session: Session;
+ /** The fold head at read time. */
+ viewCursor: string;
+}
+
+/** `session/reasoningEffortChanged` params (tdd SS4.6.9, ADR 31255 D1): a durable reasoning-effort reconfigure record landed (tdd SS3.21). Replace wholesale, latest wins; the snapshot carries the latest value (SS4.9.1). */
+export interface SessionReasoningEffortChangedParams {
+ /** The new session default: the closed eight-string tier vocabulary of tdd SS3.2, spelled identically. */
+ reasoningEffort: ReasoningEffort;
+ /** The owning session. */
+ sessionId: string;
+ /** What drove the change. */
+ source: ReasoningEffortChangeSource;
+ /** The durable records this event folded from. */
+ sourceRange: SourceRange;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+}
+
+/** `session/rename` params (tdd SS2.14.2, #27598): set or change the durable allocated session name through the runtime `session_name` command. One writer; withheld under the ephemeral profile. */
+export interface SessionRenameParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The requested name; the runtime's normalization and validation apply. */
+ name: string;
+ /** The target session. */
+ sessionId: string;
+}
+
+/** `session/rename` result (tdd SS2.14.2, #27598): `name` is the canonical (normalized) name the durable record settled. */
+export interface SessionRenameResult {
+ /** Echoes the client's id. */
+ commandId: string;
+ /** The settled canonical name. Omitted on the `RecoveryPending` arm, which answers `{commandId, status: "accepted"}` and delivers the name via `session/nameChanged` / `Session.name` (tdd SS2.14.2). */
+ name?: string;
+ /** Admission status. */
+ status: CommandStatus;
+}
+
+/** `session/resume` params (tdd SS2.5.2). */
+export interface SessionResumeParams {
+ /** The SS2.5 idempotency handle (UUIDv7). A resume that loads a session writes a durable `SessionResumed` record. */
+ commandId: string;
+ /** The same open construction-time extension object as `session/start`. */
+ config?: SessionConfig;
+ /** A view cursor previously observed by this client — or an observed `summarizedThrough` compaction anchor (tdd SS4.5.10, D-029). When present the server returns only the suffix and `history.mode` is `none` (tdd SS2.5.2). Omitted and explicit `null` both mean "no cursor" (#23468). */
+ cursor?: string | null;
+ /** Return only session metadata and live resume state; page history separately with `view/page`. Default `false` (tdd SS2.5.2). */
+ excludeItems?: boolean;
+ /** History mode preference, default `auto`. A PREFERENCE, not a budget override: when the requested mode does not fit the history budget the server downgrades it and `history.mode` reports what was actually served (tdd SS2.5.2). Ignored when `cursor` or `excludeItems` makes it moot. */
+ history?: HistoryPreference;
+ /** The session to load. */
+ sessionId: string;
+}
+
+/** `session/resume` result (tdd SS2.5.2). */
+export interface SessionResumeResult {
+ /** The served history. */
+ history: SessionHistory;
+ /** The late-joiner pointer set; empty when nothing is pending. */
+ pendingRequests: PendingRequestPointer[];
+ /** The loaded session. */
+ session: Session;
+ /** The session view head; the connection is subscribed after it. A still-loaded session a prior `view/unsubscribe` detached is RE-ATTACHED by this resume (spec 208 FR-002a, #28920): live delivery resumes from this head. Explicit-cursor re-attach with `(after, head]` engine replay stays `view/subscribe` (SS4.7.1). */
+ viewCursor: string;
+}
+
+/** `session/setApprovalMode` params (tdd SS5.12): switch the session's approval enforcement mode mid-session. A standard SS3 command. **Select, never create.** A client may *select* a mode the host's configuration already defines; it may not construct one, supply inline rules, or otherwise describe a policy on the wire — which is why [`ApprovalMode`] is closed. */
+export interface SessionSetApprovalModeParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The preconfigured mode to select. The requesting actor is recorded from the connection's `clientInfo.name` (tdd SS1.4.1). */
+ mode: ApprovalMode;
+ /** The target session. */
+ sessionId: string;
+}
+
+/** `session/setApprovalMode` result (tdd SS5.12). Applies next-action — an in-flight tool action's pending approval is not retroactively decided by a mode change. */
+export interface SessionSetApprovalModeResult {
+ /** Whether the change did anything. */
+ applyOutcome: ApprovalModeApplyOutcome;
+ /** Echoes the client's id. */
+ commandId: string;
+ /** The folded effective-mode projection — the same object the `Session` carries as `approvalMode` (tdd SS2.4, SS5.12). */
+ effectiveMode: EffectiveApprovalModeState;
+ /** Admission status. */
+ status: CommandStatus;
+}
+
+/** `session/setModel` params (tdd SS3.8): the model-picker gesture. The selection is durable and applies to subsequent model calls. */
+export interface SessionSetModelParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The selection. */
+ model: ModelSelection;
+ /** The target session. */
+ sessionId: string;
+}
+
+/** `session/setModel` result (tdd SS3.8). If a turn is running the selection is admitted now and applied at the next model-call boundary; the ack does not wait for that boundary. */
+export interface SessionSetModelResult {
+ /** Echoes the client's id. */
+ commandId: string;
+ /** Admission status. */
+ status: CommandStatus;
+}
+
+/** `session/setReasoningEffort` params (tdd SS3.21, ADR 31255 D1): set the session's standing reasoning-effort default. A turn carrying its own `reasoningEffort` overrides it for that turn only; the default overrides the host's configured default. Same accept/reject and `commandId` idempotency shape as `session/setModel` (SS3.8). */
+export interface SessionSetReasoningEffortParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The new session default: the closed eight-string tier vocabulary `turn/start` carries (SS3.2), spelled identically. Invalid tiers are invalid params. A default of `max` rides provider requests verbatim, never clamped (ADR 28621 D8, ADR 31131 D1). */
+ reasoningEffort: ReasoningEffort;
+ /** The target session. */
+ sessionId: string;
+}
+
+/** `session/setReasoningEffort` result (tdd SS3.21). The default is durable on ack and applies to turns launched after admission; a running turn keeps the request options it already resolved. */
+export interface SessionSetReasoningEffortResult {
+ /** Echoes the client's id. */
+ commandId: string;
+ /** Admission status. */
+ status: CommandStatus;
+}
+
+/** `session/start` params (tdd SS2.5.1). */
+export interface SessionStartParams {
+ /** The session's starting approval mode; server default when omitted or explicit `null` — both spellings select the default (#23468). Select, never create — the value names a mode the host's configuration already defines (tdd SS2.5.1, SS5.12). This is the only surface that declares a non-interactive run's policy (tdd SS5.11, D-008). */
+ approvalMode?: ApprovalMode | null;
+ /** The SS2.5 idempotency handle (UUIDv7). Required; the server never mints one. */
+ commandId: string;
+ /** Reserved for per-session overrides owned by a future Configuration section. Issue #32760 admits only its `mcpServers` member. */
+ config?: SessionConfig;
+ /** Initial model; server default when omitted. */
+ modelId?: string;
+ /** Initial provider routing; server default when omitted or explicit `null` — both spellings select the default (#23468). */
+ providerId?: string | null;
+ /** Exact identity for this new root session. When omitted the server mints a UUIDv7. This field never selects an existing session: a retained or reserved id is rejected `commandRejected` with reason `session_id_conflict` (tdd SS2.5.1). */
+ sessionId?: string;
+ /** Absolute path, folded into the first metadata record. */
+ workspaceRoot?: string;
+ /** The session's initial runtime workspace-root set: ordered absolute canonical existing directory paths; the first root is the CWD and plays the primary-root role; every root receives the ADR 11237 `:workspace_roots` rules; extra roots grant no Project Trust. When `workspaceRoot` is also present the two must name the same folder, compared on canonical forms (the raw `workspaceRoot` is canonicalized first; ADR 37313 D9), or the request is invalid params, and so is explicit `null` (the D-049 null-tolerant set is closed and excludes this member). Omitted preserves single-root behavior (tdd SS2.5.1, ADR 37313, #37313). */
+ workspaceRoots?: string[];
+}
+
+/** `session/start` result (tdd SS2.5.1). */
+export interface SessionStartResult {
+ /** The new session. */
+ session: Session;
+ /** The session view head after the start fold; the connection is subscribed and receives every view event after this cursor. A deduplicated retry returns this same result (tdd SS2.5.1). */
+ viewCursor: string;
+}
+
+/** `session/started` params (tdd SS2.6.1; enrolled by #33065): a session became newly loaded on this host via `session/start` or `session/fork` (never `session/resume` — Appendix C, OQ-F), broadcast to every initialized connection. The one member is the same `$defs/Session` object the `session/start`/`session/fork` results carry, so the broadcast and the result describe one fact through one type — the host builds the broadcast payload as a `$defs/Session` — the fresh-start arm reuses the result's `session` member, the start-replay arm builds the live attach snapshot — and the emission is parity-gated against this type at the producer (`session-server` prod-assembly capture) and over the committed transcript corpus (conformance `session_lifecycle_enrollment`). */
+export interface SessionStartedParams {
+ /** The newly loaded session, as of the start/fork fold. */
+ session: Session;
+}
+
+/** A session's load state (tdd SS2.4). */
+export type SessionStatus = "notLoaded" | "idle" | "running" | (string & {});
+
+/** `session/statusChanged` params (tdd SS4.6.10, ADR 31983 D2): a loaded session's projected `(status, attention)` value flipped. A command-plane broadcast — delivered to every connection regardless of its view subscription set, never gated, no `sourceRange`; the same facts live on the Session object, which is how a client seeds its table (no initial burst on connect). */
+export interface SessionStatusChangedParams {
+ /** Attention flags after the transition; present only when at least one flag is set (tdd SS2.4, ADR 31983 D3). */
+ attention?: AttentionFlag[];
+ /** The owning session. */
+ sessionId: string;
+ /** Load state after the transition (the closed SS2.4 enum, unchanged). */
+ status: SessionStatus;
+ /** The causing record's view cursor (ADR 31983 D4). Required-nullable: `null` exactly when the paired `session/closed`'s cursor is `null` (the unload fold-failure arm); a definite cursor everywhere else. */
+ viewCursor: string | null;
+}
+
+/** `session/todoListChanged` params (tdd SS4.6.3): a `TodoSnapshotUpdated` record landed. Replace the whole list on every event; an empty `items` array is a cleared list, not a no-op. */
+export interface SessionTodoListChangedParams {
+ /** The full todo list, replaced wholesale. */
+ items: TodoItem[];
+ /** The snapshot revision. Diagnostics only, never an ordering guard — `viewCursor` orders (tdd SS4.6.3). */
+ revision: number;
+ /** The owning session. */
+ sessionId: string;
+ /** The durable records this event folded from. */
+ sourceRange: SourceRange;
+ /** The tool that produced the snapshot, verbatim. */
+ sourceTool: string;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+}
+
+/** `session/tokenUsage` params (tdd SS4.6.5): one per model completion that reports usage. Carries the raw counters verbatim plus the server-derived counted-once `promptTokens`/`totalTokens` (#8803: clients display and sum these and never re-derive the provider's cache convention) and the session `cumulative` block. Accumulate-only: `cumulative` never goes backward. */
+export interface SessionTokenUsageParams {
+ /** Session running totals at this cursor; the fold owns the accumulation. Subagent/workflow-child usage is never folded in — it rides the owning items (tdd SS4.6.5). */
+ cumulative: CumulativeTokenUsage;
+ /** Model-call wall time, when measured. */
+ durationMs?: number;
+ /** Provider finish reason when reported (open vocabulary, verbatim). */
+ finishReason?: string;
+ /** The effective model that produced this usage; `null` on pre-schema records — never back-filled, an unpriced leg (tdd SS4.6.5). */
+ modelId?: string;
+ /** Prompt tokens counted exactly once under the provider's cache convention (#8803). Server-derived; deterministic — the provider is in the log. */
+ promptTokens: number;
+ /** The owning session. */
+ sessionId: string;
+ /** The durable records this event folded from. */
+ sourceRange: SourceRange;
+ /** `promptTokens + outputTokens` — the honest per-completion total. */
+ totalTokens: number;
+ /** The turn whose model call completed. */
+ turnId: string;
+ /** Raw counters verbatim from the durable record. */
+ usage: TokenUsage;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+}
+
+/** `session/userShell` params (tdd SS3.9): run a user-initiated shell command in the session's workspace — the TUI's `!` escape hatch. **Capability-gated**: the connection must negotiate `userShell` at `initialize`, and the whole justification is the SS1.10 spawn boundary. */
+export interface SessionUserShellParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The shell command to run. */
+ commandText: string;
+ /** The target session. */
+ sessionId: string;
+}
+
+/** `session/userShell` result (tdd SS3.9): immediate. The shell runs off the command worker so a long command cannot stall the command plane; the output arrives as the `userShell` item's terminal view event. */
+export interface SessionUserShellResult {
+ /** Echoes the client's id. */
+ commandId: string;
+ /** Admission status. */
+ status: CommandStatus;
+}
+
+/** The view-health state (tdd SS2.5.2 companion). Open enum (`x-msp-openness: open`): a client MUST ignore an unrecognized value. v1 emits only `Unavailable`; openness itself reserves additive room for a future re-arm (ADR 32557 D1 names it `healthy`) and for the #14401 durable-degraded axis, so no never-emitted token is baked onto the stable surface now. */
+export type SessionViewHealth = "unavailable" | (string & {});
+
+/** `session/viewHealthChanged` params (ADR 32557; #32557): the named session's live view stream became unavailable, and why. Best-effort: ordered after already-queued view frames and may be dropped (for example when the connection is closing), so a client MUST NOT assume a guaranteed push and still reads `history.noneReason` on its next resume/read (FM-005). */
+export interface SessionViewHealthChangedParams {
+ /** The new view-health state. In v1 the host emits only `Unavailable`. */
+ health: SessionViewHealth;
+ /** Why the view is unavailable — the SAME typed `HistoryNoneReason` vocabulary the pull path stamps on `history.noneReason` (tdd SS2.5.2, D-050), so a client reuses one handler for push and pull. `projectionUnavailable` in v1; present only when `health` is `Unavailable`. Open on the client side: an unknown reason decodes conservatively and renders generically. */
+ noneReason?: HistoryNoneReason;
+ /** The session whose live view health changed. */
+ sessionId: string;
+}
+
+/** One typed-invocable shortcut spelling (tdd SS3.22.1). A plugin skill may contribute two rows: its bare-name winner and its qualified `:` form. */
+export interface SkillCatalogEntry {
+ /** Present when the skill declares an argument hint. */
+ argumentHint?: string;
+ /** The skill's palette summary. */
+ description: string;
+ /** The skill display name the first-party palette shows. */
+ displayName: string;
+ /** The owning plugin's identifier; present when `source` is `plugin`. */
+ pluginId?: string;
+ /** The shortcut token without the leading slash — bare (`fix-bug`) or plugin-qualified (`acme:deploy`) — the exact value a `skill` input part submits. Unique within one response. */
+ selector: string;
+ /** Where the skill comes from. */
+ source: SkillSource;
+}
+
+/** `skill/changed` params (tdd SS3.22.2): the session's user-invocable set changed; clients re-issue `skill/list`. Advisory — the host may coalesce bursts and guarantees no ordering relative to view events (ADR 32471 D3). */
+export interface SkillChangedParams {
+ /** The session whose set changed. */
+ sessionId: string;
+}
+
+/** `skill/list` params (tdd SS3.22.1). Per-session because skill scope follows the session's workspace and plugin state. */
+export interface SkillListParams {
+ /** The target session. */
+ sessionId: string;
+}
+
+/** `skill/list` result (tdd SS3.22.1): one row per typed-invocable shortcut spelling — exactly the invocations the first-party typed dispatch accepts (spec 11352 INV-007 predicate and the shared shortcut layer's name resolution, both by call-through; ADR 32471 D2). */
+export interface SkillListResult {
+ /** The session's user-invocable skill rows. */
+ skills: SkillCatalogEntry[];
+}
+
+/** A skill row's source scope (tdd SS3.22.1): the projection of the skills crate's `SkillsSourceScope`. Open (server-produced result vocabulary, the #22785 enum-openness rule): a future scope value is additive. */
+export type SkillSource = "bundled" | "user" | "project" | "plugin" | (string & {});
+
+/** The compaction boundary an anchored snapshot is anchored at (tdd SS2.5.2). */
+export interface SnapshotAnchor {
+ /** The view cursor of the boundary's `compaction` event. */
+ boundaryCursor: string;
+ /** The boundary's opaque compaction anchor (tdd SS4.5.10). */
+ summarizedThrough: string;
+}
+
+/** The complete folded view at the snapshot cursor (tdd SS4.9.1). Additive-optional evolution applies exactly as everywhere else; unknown members MUST be ignored, and preserved if re-serialized. **One served site does not satisfy this type today, escalated under #22785 (E8).** The genesis snapshot rung serves `state: {"items": [...]}` alone (`tbh-session-view-serve`'s `materialized_fold.rs`, the `select_genesis_history` call), while the anchored rung serves the full folded state. A schema-validating client resuming with `{"history": "snapshot"}` against the real fold therefore sees the other required members missing. The fix is a serving change in the #208/#14653 lane (serialize the `SessionViewState` the genesis path already folds, as the anchored path does) plus its own RED against the real fold; it is not a shape change here, because SS4.9.1 ratifies this shape. */
+export interface SnapshotState {
+ /** The running foreground turn; `null` when none is running. */
+ activeTurn: TurnRef | null;
+ /** The effective approval mode at this cursor — the same object the `Session` carries (tdd SS2.4, SS5.12). */
+ approvalMode: EffectiveApprovalModeState;
+ /** Latest branch observation; `null` when no fact has landed. */
+ branch: BranchState | null;
+ /** The latest `(windowTokens, usedTokens, pressure)` triple. SS4.9.1 says "`null`/absent" and SS4.9.2's worked example OMITS the member; the binary omits it too, so this is the absent arm — the four siblings above are present-null in the same frame. INV-017 admits one or the other, never both; escalated under #22785. */
+ contextUsage?: ContextUsage;
+ /** Latest effective model; `null` when no fact has landed. */
+ effectiveModel: EffectiveModel | null;
+ /** Latest goal block; `null` when no fact has landed. */
+ goal: Goal | null;
+ /** Every item, in first-opened order, each at its latest revision at the snapshot cursor. One schema per kind, shared with the notification item object — which is what makes snapshot+suffix a pure splice (tdd SS4.9.1). */
+ items: Item[];
+ /** The settled canonical session name; `null` when the session was never named (#27598, tdd SS4.9.1 / SS2.14). Folds the same durable `session/nameChanged` record `Session.name` reports. */
+ name?: string;
+ /** The pending-approval half of the pending set. */
+ pendingApprovals: PendingApprovalPointer[];
+ /** The pending-user-input half of the pending set. */
+ pendingUserInputs: PendingUserInputPointer[];
+ /** Admitted-but-not-launched submits, in launch order (tdd SS3.1.4). */
+ queuedTurns: TurnRef[];
+ /** The latest session-default reasoning effort with its source; ABSENT until a set lands (tdd SS4.9.1 `reasoningEffort`, ADR 31255 D1 — the `contextUsage` absent arm, never present-null). */
+ reasoningEffort?: ReasoningEffortState;
+ /** Latest todo list; `null` when no fact has landed. */
+ todoList: TodoListState | null;
+ /** The `cumulative` block of the last `session/tokenUsage` event; zeroes when none (tdd SS4.9.1). */
+ tokenUsage: CumulativeTokenUsage;
+ /** Completed-turn count at this cursor. */
+ turnCount: number;
+}
+
+/** The inclusive raw-record range a durable-sourced view event folded from (tdd SS4.2) — the reconciliation token: re-folding the cited records from the canonical fold state immediately before `first` — appended host-death terminals seed from the end-of-records state — reproduces the event (tdd SS7.5; spec 14653 T041/INV-009). In v1 it is an **opaque provenance token**: no wire method reads what it points at (the SS6 raw-log altitude is deferred, #13929). Ephemeral-sourced events (`item/delta`, and an `item/started` that opens on an ephemeral record) carry no `sourceRange` — ephemeral records may be evicted by retention (tdd SS4.2; spec 14653 INV-009). */
+export interface SourceRange {
+ /** The first record of the inclusive range. */
+ first: RecordPosition;
+ /** The last record of the inclusive range; equal to `first` for an event folded from one record. */
+ last: RecordPosition;
+ /** The stream the folded records live on (run stream, or the session stream's mirror of task/approval/subagent-control records — whichever the fold actually consumed, tdd SS4.2). */
+ stream: StreamRef;
+}
+
+/** One raw stream named by a [`SourceRange`] (tdd SS4.2). */
+export interface StreamRef {
+ /** The stream id. */
+ id: string;
+ /** The stream kind, verbatim raw-log vocabulary (e.g. `"run"`, `"session"`). A free string, not an enum: `sourceRange` is an opaque provenance token in v1 and the raw stream vocabulary is the deferred SS6 altitude's to freeze (#13929). */
+ kind: string;
+}
+
+/** Subagent control status (tdd SS4.5.7, camelCased `SubagentControlStatus`). Open; the generic item `status` is the terminal authority. */
+export type SubagentControlStatus =
+ | "accepted"
+ | "starting"
+ | "running"
+ | "resultReady"
+ | "closing"
+ | "closed"
+ | "recoveryPending"
+ | "manualReconciliation"
+ | (string & {});
+
+/** Params for `subagent/sendMessage` and `subagent/followupTask` (SS3.16): a child target plus the input body. */
+export interface SubagentInputParams {
+ /** The note/task text: trimmed with Unicode-whitespace semantics, rejected when empty after trimming, delivered trimmed with multibyte content byte-for-byte intact (SS3.16). */
+ body: string;
+ /** Client-minted UUIDv7 command id (SS3.1.1). */
+ commandId: string;
+ /** Target session (UUIDv7 string; SS3 preamble). */
+ sessionId: string;
+ /** Durable child id (the SS4.5.7 item's `subagentId`; opaque string). */
+ subagentId: string;
+}
+
+/** Params for `subagent/interrupt`, `subagent/stop`, and `subagent/close` (SS3.16): a child target plus an optional human-readable reason that is preserved on the durable effect record. */
+export interface SubagentOwnerReasonParams {
+ /** Client-minted UUIDv7 command id (SS3.1.1). */
+ commandId: string;
+ /** Optional reason, preserved on the durable owner-command record. */
+ reason?: string;
+ /** Target session (UUIDv7 string; SS3 preamble). */
+ sessionId: string;
+ /** Durable child id (the SS4.5.7 item's `subagentId`; opaque string). */
+ subagentId: string;
+}
+
+/** A subagent's result envelope (tdd SS4.5.7, `SubagentResultEnvelope`). */
+export interface SubagentResult {
+ /** Artifact references, verbatim. */
+ artifactRefs: string[];
+ /** Error kind, verbatim durable vocabulary, when the child failed. */
+ errorKind?: string;
+ /** Evidence references, verbatim. */
+ evidenceRefs: string[];
+ /** Structured result data, verbatim, when present. */
+ structuredData?: Record;
+ /** Bounded result summary (<=512 chars, runtime-enforced). */
+ summary: string;
+ /** Result text (<=32 KiB), when present. */
+ text?: string;
+}
+
+/** Params for `subagent/resume`, `subagent/reopen`, and `subagent/readResult` (SS3.16): the bare child target. */
+export interface SubagentTargetParams {
+ /** Client-minted UUIDv7 command id (SS3.1.1). */
+ commandId: string;
+ /** Target session (UUIDv7 string; SS3 preamble). */
+ sessionId: string;
+ /** Durable child id (the SS4.5.7 item's `subagentId`; opaque string). */
+ subagentId: string;
+}
+
+/** The one usage payload shape: the `usage/read` result's `usage` member and the `usage/changed` params (ADR 32563 D2/D3). The numbers are point-in-time — `observedAtMs` is the host's arrival stamp, so a client renders "as of", never implies live data (spec 18742 US-FR-004). */
+export interface SubscriptionUsage {
+ /** When the host RECEIVED this observation (frame arrival or mint request-send), epoch milliseconds. */
+ observedAtMs: number;
+ /** The provider's subscription tier id, verbatim. */
+ tier: string;
+ /** The rolling weekly block. */
+ weekly: SubscriptionUsageWeekly;
+ /** The current window. */
+ window: SubscriptionUsageWindow;
+}
+
+/** The rolling weekly block: same semantics as [`SubscriptionUsageWindow`] without a duration (ADR 32563 D2). */
+export interface SubscriptionUsageWeekly {
+ /** When the weekly window resets, epoch milliseconds. */
+ resetsAtMs: number;
+ /** Percent of the weekly budget used (integer ≥ 0, may exceed 100). */
+ usedPercent: number;
+}
+
+/** The current usage window (the provider's 5-hour-class block): verbatim provider percentages with the reset stamp normalized to epoch milliseconds (ADR 32563 D2). */
+export interface SubscriptionUsageWindow {
+ /** When the window resets, epoch milliseconds. */
+ resetsAtMs: number;
+ /** Percent of the window's budget used: an integer ≥ 0, verbatim from the provider — over-quota values above 100 are valid. */
+ usedPercent: number;
+ /** The window's length in minutes (> 0). */
+ windowDurationMins: number;
+}
+
+/** A success response frame (SS1.2 §2.3). */
+export interface SuccessResponse {
+ /** Echo of the request id. */
+ id: RequestId;
+ /** The literal `"2.0"`. */
+ jsonrpc: JsonRpcVersion;
+ /** Always a JSON object, possibly `{}`, never a bare scalar — so every result can grow additive-optional members (SS1.2). */
+ result: Record;
+}
+
+/** `task/background` params (tdd §3.13): durably send a running foreground tool task to the background. */
+export interface TaskBackgroundParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The target session. */
+ sessionId: string;
+ /** The task to background, exactly as the view names it: the `toolCall` item's `itemId` IS the task id (SS4.5.5). */
+ taskId: string;
+}
+
+/** The `task/background` / `task/stop` ack (tdd §3.13/§3.14): admission-only, echoing the targeted task. */
+export interface TaskCommandResult {
+ /** Echoes the client's id. */
+ commandId: string;
+ /** Admission status. */
+ status: CommandStatus;
+ /** Echoes the targeted task id. */
+ taskId: string;
+}
+
+/** `task/stopAll` params (tdd §3.15): stop every stoppable background workload live at admission. */
+export interface TaskStopAllParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The target session. */
+ sessionId: string;
+}
+
+/** The `task/stopAll` ack (tdd §3.15): always `accepted`, including over an empty set — a blanket stop over nothing is a satisfied gesture. The ack deliberately carries no stopped-task list; count the kills from the view. */
+export interface TaskStopAllResult {
+ /** Echoes the client's id. */
+ commandId: string;
+ /** Admission status. */
+ status: CommandStatus;
+}
+
+/** `task/stop` params (tdd §3.14): stop one named background task. Required target, never "whichever is loudest" — §3.15 is the blanket verb. */
+export interface TaskStopParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The target session. */
+ sessionId: string;
+ /** The task to stop, the `toolCall` item's `itemId` (SS4.5.5). */
+ taskId: string;
+}
+
+/** One todo entry (tdd SS4.6.3). */
+export interface TodoItem {
+ /** Present-tense active form, when the tool supplied one. */
+ activeForm?: string;
+ /** The todo status (camelCased runtime `TodoStatus`). */
+ status: TodoStatus;
+ /** The todo text. */
+ text: string;
+}
+
+/** The latest todo-list fact in the snapshot (tdd SS4.6.3, SS4.9.1). */
+export interface TodoListState {
+ /** The full todo list. */
+ items: TodoItem[];
+ /** The snapshot revision. Diagnostics only, never an ordering guard. */
+ revision: number;
+ /** The tool that produced the snapshot, verbatim. */
+ sourceTool: string;
+}
+
+/** Todo status (tdd SS4.6.3): closed in the runtime, wire-open. */
+export type TodoStatus = "pending" | "inProgress" | "completed" | "cancelled" | (string & {});
+
+/** Raw token counters, verbatim from the durable record (tdd SS4.6.5, the runtime's `Usage`, camelCased). Not directly summable across providers — sum the counted-once derivations instead (#8803). */
+export interface TokenUsage {
+ /** Cache read tokens, only when the provider distinguishes writes/reads. */
+ cacheReadTokens?: number;
+ /** Cache write tokens, only when the provider distinguishes writes/reads. */
+ cacheWriteTokens?: number;
+ /** Provider-reported cache tokens (inside or beside `inputTokens`, provider-convention-dependent — the reason `promptTokens` exists). */
+ cachedTokens: number;
+ /** Provider-reported input tokens. */
+ inputTokens: number;
+ /** Provider-reported output tokens. */
+ outputTokens: number;
+ /** Output tokens spent on reasoning, when the provider reports it. */
+ reasoningTokens: number;
+}
+
+/** Optional W3C trace context, on requests in both directions only — never on responses or notifications (SS1.8). */
+export interface TraceContext {
+ /** W3C `traceparent` string; receivers that do not trace ignore it. */
+ traceparent?: string;
+ /** W3C `tracestate` string. */
+ tracestate?: string;
+}
+
+/** `turn/cancel` params (tdd SS3.5): plain cancellation on the normal command lane. Same shape as `turn/interrupt`, **without** `retract` — pairing a retract with a plain cancel is durably rejected `not_paired_interrupt`. */
+export interface TurnCancelParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The target session. */
+ sessionId: string;
+ /** The exact turn to cancel; omit to target the current foreground turn. Any syntactically valid UUID: a turn from an older session may carry a v4 or v5 id. A malformed id is `invalidParams`. */
+ turnId?: string;
+}
+
+/** `turn/cancel` result (tdd SS3.5): identical envelope to `turn/interrupt`. */
+export interface TurnCancelResult {
+ /** Echoes the client's id. */
+ commandId: string;
+ /** Admission status. */
+ status: CommandStatus;
+ /** The cancelled turn. */
+ turnId: string;
+}
+
+/** `turn/completed` params (tdd SS4.5.1): the run's durable terminal record landed. */
+export interface TurnCompletedParams {
+ /** Turn duration; absent means unmeasured, never fabricated. */
+ durationMs?: number;
+ /** Present iff `terminal` is `"failed"` (tdd SS4.5.1): mid-turn failures reach the client here — never as a JSON-RPC error. */
+ error?: TurnError;
+ /** The runtime's free-text terminal reason, verbatim. Display and diagnostics only; never branch on it. */
+ reason?: string;
+ /** The owning session. */
+ sessionId: string;
+ /** The durable records this event folded from. */
+ sourceRange: SourceRange;
+ /** The turn terminal (open enum). */
+ terminal: TurnTerminal;
+ /** Time to first token, when measured. */
+ timeToFirstTokenMs?: number;
+ /** The terminated turn. */
+ turnId: string;
+ /** The turn's aggregate token usage, summed across the turn's model completions (same shape as `session/tokenUsage.usage`). */
+ usage?: TokenUsage;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+}
+
+/** The settled turn-failure object (tdd SS4.5.1): `{kind, message, retryable}`. */
+export interface TurnError {
+ /** The failure class (open camelCase enum grounded in the runtime's terminal failure classification). */
+ kind: TurnErrorKind;
+ /** Human-readable failure text. */
+ message: string;
+ /** The server's judgment that resubmitting the same input may succeed. */
+ retryable: boolean;
+}
+
+/** Turn failure classes (tdd SS4.5.1, `TerminalErrorKind` plus the model-task failure class). Open. */
+export type TurnErrorKind =
+ | "stepLimit"
+ | "configError"
+ | "projectionError"
+ | "logError"
+ | "workflowLaunchError"
+ | "environmentError"
+ | "modelError"
+ | "launchError"
+ | "authRequired"
+ | (string & {});
+
+/** One ordered content part of a turn submission (tdd SS3.2). File mentions are text, not a part type: write `@relative/path` in a text part. A structured `mention` part is reserved and currently rejected, and an unknown part type is `invalidParams` (tdd SS3.1.2, SS3.2) — which is what closes [`TurnInputPartType`]. Modelled as a discriminated flat object rather than a Rust `enum`, the convention [`crate::view::approval::ApprovalSubject`] already established for a wire union in this crate: the v1 schema model names no object-variant union shape and fails closed on one. The serialized JSON is the tdd shape either way; what a flat object cannot express is "`mediaType` is required exactly when `type` is `image`". **RULED (#22785 E4, owner, 2026-08-26): the precedent is accepted.** A strict union node kind may be funded later as a follow-up; if it is, it must cover [`crate::method::lifecycle::PendingRequestPointer`] too. `height` may only appear together with `width`. `width` may only appear together with `height`. */
+export interface TurnInputPart {
+ /** Free-text skill arguments, optional on a `skill` part — the wire twin of what the TUI accepts after the shortcut token (tdd SS3.22.3). */
+ arguments?: string;
+ /** Base64 payload, required on an `image` part. Invalid base64 or an empty payload is rejected with invalid params. */
+ base64Data?: string;
+ /** Pixel height; must be provided together with `width` or not at all (tdd SS3.2, #22785 E6c). */
+ height?: number;
+ /** Media type, required on an `image` part. */
+ mediaType?: string;
+ /** The skill to invoke, required on a `skill` part (tdd SS3.2, SS3.22.3; ADR 32471 D4): a bare or plugin-qualified shortcut token from `skill/list`. The HOST resolves and expands; an unknown selector is the typed `-32032 skillNotFound` request error. */
+ selector?: string;
+ /** User prompt text, on a `text` part. Multiple text parts are joined in order into the turn's prompt. */
+ text?: string;
+ /** The part type. */
+ type: TurnInputPartType;
+ /** Pixel width; must be provided together with `height` or not at all (tdd SS3.2). Published as a `dependentRequired` pair under #22785 E6c. */
+ width?: number;
+}
+
+/** The `type` discriminator of a turn input part (tdd SS3.2). Closed: an unknown part type is `invalidParams` (tdd SS3.1.2). */
+export type TurnInputPartType = "text" | "image" | "skill";
+
+/** `turn/interrupt` params (tdd SS3.4): the "user pressed stop" gesture, on the runtime's priority lane. */
+export interface TurnInterruptParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** Pair a retract intent with the interrupt: if the turn is cancelled before any assistant output committed, the submission is durably retracted (view event `turn/retracted`) so the client may restore the prompt text. A rejected retract does not undo the interrupt. Default `false` (tdd SS3.4). */
+ retract?: boolean;
+ /** The target session. */
+ sessionId: string;
+ /** The exact turn to interrupt. Omit to target the session's current foreground turn, resolved at admission; prefer passing the explicit id when you have one (tdd SS3.4). Any syntactically valid UUID: a turn from an older session may carry a v4 or v5 id. A malformed id is `invalidParams`. */
+ turnId?: string;
+}
+
+/** `turn/interrupt` result (tdd SS3.4). Acceptance means the interrupt was admitted, **not** that the turn is already stopped: the turn is over when you fold its `turn/completed` with terminal `cancelled`. */
+export interface TurnInterruptResult {
+ /** Echoes the client's id. */
+ commandId: string;
+ /** Admission status. */
+ status: CommandStatus;
+ /** The interrupted turn. */
+ turnId: string;
+}
+
+/** A turn named by the snapshot's active/queued lists (tdd SS4.9.1). */
+export interface TurnRef {
+ /** The `commandId` of the submit that minted it. */
+ commandId: string;
+ /** The turn's id, pre-minted per tdd SS3.1.4. */
+ turnId: string;
+}
+
+/** `turn/retracted` params (tdd SS4.5.1): an interrupt-paired retract was durably accepted. The retracted user-message item is re-emitted via `item/updated` with `retracted: true`. */
+export interface TurnRetractedParams {
+ /** The retracted submission's command id. */
+ commandId: string;
+ /** The owning session. */
+ sessionId: string;
+ /** The durable records this event folded from. */
+ sourceRange: SourceRange;
+ /** The turn whose submission was retracted. */
+ turnId: string;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+}
+
+/** `turn/retryScheduled` params (tdd SS4.5.1, spec 14412; D-026): a durable turn retry-scheduled fact folded — the failing model attempt's scheduled retry is observable BEFORE the turn terminates, so a streaming client can render "attempt N/M · retrying in Ss · reason" instead of dead air. Non-terminal: it never resolves a turn-wait (tdd SS3.1.4). The delay is the recorded scheduled backoff, never an absolute fire time — clients derive any countdown locally. `sourceRange` cites the session stream's mirror of the task-lifecycle record (tdd SS4.2). */
+export interface TurnRetryScheduledParams {
+ /** The attempt that failed (producer-normalized, >= 1). */
+ attempt: number;
+ /** The turn's model-retry chain bound. */
+ maxAttempts: number;
+ /** The attempt about to run (producer contract: attempt < nextAttempt <= maxAttempts; not a schema constraint). */
+ nextAttempt: number;
+ /** The recorded stopping reason through the shared task-detail normalization (non-empty; capped at 160 characters). */
+ reason: string;
+ /** The scheduled backoff delay in milliseconds, verbatim from the durable fact. */
+ retryDelayMs: number;
+ /** The owning session. */
+ sessionId: string;
+ /** The durable record this event folded from (the session stream's mirror of the retry-scheduled task status; `first == last`). */
+ sourceRange: SourceRange;
+ /** The running turn whose model attempt is being retried. */
+ turnId: string;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+}
+
+/** What `turn/start` did with the input (tdd SS3.2). Resolves OQ-H in v1: since `queue` is the default `ifBusy`, clients need to distinguish these without folding history. */
+export type TurnStartDisposition = "started" | "queued" | "steered" | (string & {});
+
+/** `turn/start.providerRequestOptions` is deliberately absent: **RULED (#22785 E3, owner, 2026-08-26) to stay off the published schema.** The schema is the contract, and a free-form-object node kind is revisited only if the experimental field graduates. `turn/start` params (tdd SS3.2). */
+export interface TurnStartParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). The fresh turn's `turnId` derives from it (tdd SS3.1.4). */
+ commandId: string;
+ /** Presentation form of the prompt for transcripts. Durable; carried on the resulting user-message view item. Never model-visible (tdd SS3.2). */
+ displayText?: string;
+ /** Disposition when a turn is already running; default `queue`. */
+ ifBusy?: IfBusy;
+ /** Ordered content parts; required and non-empty. */
+ input: TurnInputPart[];
+ /** Reasoning tier sampled at submission for this turn. */
+ reasoningEffort?: ReasoningEffort;
+ /** The target session. */
+ sessionId: string;
+ /** A sticky REPLACEMENT of the session's runtime workspace-root set, binding at this turn's launch and persisting for subsequent turns until replaced again — unlike `reasoningEffort`, which is this-turn-only. Same shape and validation as `session/start.workspaceRoots`; invalid params on an explicit `ifBusy: "steer"` submit and so is explicit `null` (the D-049 null-tolerant set is closed); omitted means "unchanged", never "reset" (tdd SS3.2, ADR 37313 D3, #37313). */
+ workspaceRoots?: string[];
+}
+
+/** `turn/start` result (tdd SS3.2). */
+export interface TurnStartResult {
+ /** Echoes the client's id. */
+ commandId: string;
+ /** What happened to the input. */
+ disposition: TurnStartDisposition;
+ /** `true` iff `disposition` is `started`; retained as the boolean shorthand — `disposition` is authoritative (tdd SS3.2). */
+ startedNewTurn: boolean;
+ /** Admission status. */
+ status: CommandStatus;
+ /** The turn that will carry (or absorbed) this input. Authoritative: always take it from the ack rather than deriving it (tdd SS3.2). */
+ turnId: string;
+}
+
+/** `turn/started` params (tdd SS4.5.1): a foreground turn began running — fresh submits immediately, queued submits at their launch boundary, never steered submits. */
+export interface TurnStartedParams {
+ /** The submitting command; `turnId == commandId` for fresh turns (tdd SS3.1.4). */
+ commandId: string;
+ /** The owning session. */
+ sessionId: string;
+ /** The durable records this event folded from. */
+ sourceRange: SourceRange;
+ /** The started turn. */
+ turnId: string;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+}
+
+/** `turn/steer` params (tdd SS3.3): exact-target steering into the currently running turn. */
+export interface TurnSteerParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The turn you believe is running. Closes the race where the turn completes or is replaced between your read and your steer: input meant for turn A can never leak into turn B (tdd SS3.3). Any syntactically valid UUID: a turn from an older session may carry a v4 or v5 id. A malformed id is `invalidParams`; an id that is not the running turn is refused. */
+ expectedTurnId: string;
+ /** Same content parts as `turn/start`. */
+ input: TurnInputPart[];
+ /** Reasoning tier for the model calls this steer's input reaches. Applies forward, never backward; absent means unspecified, not "reset" (tdd SS3.3, D-024). */
+ reasoningEffort?: ReasoningEffort;
+ /** The target session. */
+ sessionId: string;
+}
+
+/** `turn/steer` result (tdd SS3.3). */
+export interface TurnSteerResult {
+ /** Echoes the client's id. */
+ commandId: string;
+ /** Admission status. */
+ status: CommandStatus;
+ /** The running turn that absorbed the input. */
+ turnId: string;
+}
+
+/** Turn terminal vocabulary (tdd SS4.5.1): exactly the runtime's `RunTerminalKind` — closed in the runtime, wire-open for evolution. */
+export type TurnTerminal = "completed" | "failed" | "cancelled" | (string & {});
+
+/** `turn/unqueue` params (tdd SS3.6): reclaim a queued submit before it launches. It is **not** a stop — a reclaim that arrives after its target launched is durably rejected, never silently upgraded into a cancel. */
+export interface TurnUnqueueParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The target session. */
+ sessionId: string;
+ /** The queued turn to reclaim, exactly as the queueing `turn/start`'s ack minted it and as snapshot `queuedTurns` lists it. Required, and never "whichever is newest" (tdd SS3.6). Any syntactically valid UUID: a turn from an older session may carry a v4 or v5 id. A malformed id is `invalidParams`. */
+ turnId: string;
+}
+
+/** `turn/unqueue` result (tdd SS3.6). Admission only — but for this command admission *is* the race: an admitted reclaim implies the turn will not launch. The authoritative removal is the `turn/unqueued` view event. */
+export interface TurnUnqueueResult {
+ /** Echoes the client's id. */
+ commandId: string;
+ /** Admission status. */
+ status: CommandStatus;
+ /** The reclaimed turn. */
+ turnId: string;
+}
+
+/** `turn/unqueued` params (tdd SS3.6, SS4.5.1): a queued submit's reclaim durably won; its pre-minted turn never runs. Carries the reclaimed `turnId` and the `commandId` of the `turn/start` that queued it, so a client can restore the submission's text exactly as for `turn/retracted`. No `turn/started`/`turn/completed` is ever emitted for this `turnId` (SDK turn-waits settle on this event too, tdd SS3.1.4). `sourceRange` cites the SESSION stream's reclaim record — a reclaimed turn never had a run stream. */
+export interface TurnUnqueuedParams {
+ /** The `commandId` of the `turn/start` that queued the reclaimed turn. */
+ commandId: string;
+ /** The owning session. */
+ sessionId: string;
+ /** The durable records this event folded from (the session stream's reclaim record). */
+ sourceRange: SourceRange;
+ /** The reclaimed turn: pre-minted at admission, never launched. */
+ turnId: string;
+ /** Opaque, strictly monotonic view cursor (tdd SS4.1). */
+ viewCursor: string;
+}
+
+/** One element of a `view/page` result's `events` array: an **unframed view notification** exactly as tdd SS4.2.1 defines it — the nested pair `{"method", "params"}`, which is the live notification minus `jsonrpc` and `emittedAtMs`, with nothing lifted out of `params` and nothing spliced into it. SS4.2.1 is the single normative definition; SS4.7.3 and SS7.4 both cite it, so the two surfaces cannot drift. */
+export interface UnframedViewNotification {
+ /** The event type — the live notification's method name, retained because the type lives only in the notification name and would otherwise be lost (tdd SS4.2.1). */
+ method: string;
+ /** The notification's params object, verbatim. */
+ params: UnframedViewNotificationParams;
+}
+
+/** The `params` of an unframed view notification (tdd SS4.2.1, SS4.2). Declares the SS4.2 base members every view notification carries, and stays **open** for the event-specific fields SS4.5/SS4.6/SS5 add per event type. The v1 schema model names no method-correlated union (the SS4.7.3 `events` element's `params` arm is selected by its sibling `method`), so the per-event arms cannot be expressed here without one; enumerating them as an uncorrelated union would additionally exclude `turn/unqueued`, whose notification row is another lane's ratified deferral (#207/#14407) — a published schema that rejects a real page element is the exact #19923 defect this PR exists to close. Recorded as a Design delta on #22785. `sourceRange` is required here and not optional: `view/page` serves durable-sourced events only (tdd SS4.7.3), and durable-sourced is *defined* as carrying a `sourceRange` — the SS4.2 ephemeral-sourced exemption applies to `item/delta`, which `view/page` never replays. */
+export interface UnframedViewNotificationParams {
+ /** The owning session (tdd SS4.2). */
+ sessionId: string;
+ /** The durable records this event folded from (tdd SS4.2, SS6.8). */
+ sourceRange: SourceRange;
+ /** The event's opaque, strictly monotonic view cursor. It stays **inside** `params`, where every live notification already carries it (tdd SS4.2.1) — nothing is spliced beside `method`. */
+ viewCursor: string;
+}
+
+/** The only scalar alternative to a known effort array. Kept as a closed singleton so arbitrary strings and uppercase spellings fail decoding. */
+export type UnknownModelReasoningEffortVariants = "unknown";
+
+/** `usage/read` result: `{usage?}` — omitted, never `null`, when the host has observed nothing (ADR 32563 D2: truthful absence, no "nothing observed" error). */
+export interface UsageReadResult {
+ /** The last-observed subscription usage window, when one exists. */
+ usage?: SubscriptionUsage;
+}
+
+export interface UserInputAnswer {
+ freeText?: string;
+ note?: string;
+ questionId: string;
+ selectedLabel?: string;
+ selectedLabels?: string[];
+}
+
+/** `userInput/answer` params (tdd SS5.10.2): answer every question. Each answer carries `questionId` then exactly one of `selectedLabel` (single mode), `selectedLabels` (multiple mode, within min/max bounds), or `freeText` (<=500 chars); plus an optional `note` (<=500). Answers that do not match the prompt fail -32057 `userInputAnswerInvalid`. Image `attachments` are a **reserved** field in v1, rejected if sent, because the blob-upload path they reference is reserved in tdd SS3.2. */
+export interface UserInputAnswerParams {
+ /** One entry per question. */
+ answers: UserInputAnswer[];
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The target session. */
+ sessionId: string;
+ /** The prompt being answered. */
+ userInputId: string;
+}
+
+/** `userInput/answer` result (tdd SS5.10.2). */
+export interface UserInputAnswerResult {
+ /** Echoes the client's id. */
+ commandId: string;
+ /** Admission status. */
+ status: CommandStatus;
+ /** The prompt this answer settled. */
+ userInputId: string;
+}
+
+/** `userInput/cancel` params (tdd SS5.10.2): decline to answer; the tool call resolves with a cancelled result the model sees. */
+export interface UserInputCancelParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** Why the prompt was declined. */
+ reason?: string;
+ /** The target session. */
+ sessionId: string;
+ /** The prompt being declined. */
+ userInputId: string;
+}
+
+/** `userInput/cancel` result (tdd SS5.10.2). */
+export interface UserInputCancelResult {
+ /** Echoes the client's id. */
+ commandId: string;
+ /** Admission status. */
+ status: CommandStatus;
+ /** The prompt this cancellation settled. */
+ userInputId: string;
+}
+
+export interface UserInputClarification {
+ content: string;
+ format: string;
+}
+
+/** `userInput/clarify` params (tdd SS5.10.2): answer with a free-form clarification instead of the structured options — the "let me explain" path; the model receives the clarification text and re-decides. */
+export interface UserInputClarifyParams {
+ /** `format` is `"text"` in v1 (open); `content` is <=500 chars. */
+ clarification: UserInputClarification;
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The target session. */
+ sessionId: string;
+ /** The prompt being clarified. */
+ userInputId: string;
+}
+
+/** `userInput/clarify` result (tdd SS5.10.2). */
+export interface UserInputClarifyResult {
+ /** Echoes the client's id. */
+ commandId: string;
+ /** Admission status. */
+ status: CommandStatus;
+ /** The prompt this clarification settled. */
+ userInputId: string;
+}
+
+export interface UserInputOption {
+ description?: string;
+ label: string;
+ preview?: UserInputOptionPreview;
+}
+
+export interface UserInputOptionPreview {
+ content: string;
+ format: string;
+}
+
+export type UserInputOutcome =
+ | "answered"
+ | "cancelled"
+ | "interrupted"
+ | "clarified"
+ | "timedOut"
+ | "aborted"
+ | (string & {});
+
+export interface UserInputQuestion {
+ header: string;
+ id: string;
+ options: UserInputOption[];
+ question: string;
+ selection: UserInputSelection;
+}
+
+/** Full params shared by `userInput/request` and `userInput/requested`. */
+export interface UserInputRequestParams {
+ autoResolutionMs?: number;
+ itemId: string;
+ questions: UserInputQuestion[];
+ sessionId: string;
+ sourceRange?: SourceRange;
+ toolCallId: string;
+ toolName: string;
+ turnId: string;
+ userInputId: string;
+ viewCursor: string;
+}
+
+export interface UserInputSelection {
+ maxSelections?: number;
+ minSelections?: number;
+ mode: UserInputSelectionMode;
+}
+
+export type UserInputSelectionMode = "single" | "multiple";
+
+/** `userInput/settled` params: the first durable prompt settlement. */
+export interface UserInputSettledParams {
+ answers: UserInputAnswer[];
+ clarification: UserInputClarification | null;
+ decidedByCommandId: string | null;
+ outcome: UserInputOutcome;
+ reason: string | null;
+ sessionId: string;
+ sourceRange: SourceRange;
+ userInputId: string;
+ viewCursor: string;
+}
+
+/** Winning terminal returned to a late user-input command. */
+export interface UserInputSettlementSummary {
+ outcome: string;
+ viewCursor: string;
+}
+
+/** Version-control system of a branch observation (tdd SS4.6.4). Open. */
+export type Vcs = "git" | "sapling" | (string & {});
+
+/** `view/gap` params (spec 208 SS4.8, FM-001): push delivery dropped events, and this names the hole. The bracket is deferred (D-16487-2): it flushes at the subscription's next ACCEPTED delivery, never at enqueue time, so `next` always names an event whose own delivery is proven. A run of consecutive undelivered events coalesces into one bracket keeping the FIRST range's `after` (D-16487-1). The gap rides the protected reserved queue, so no wire-interleaving order against neighbouring deliveries is promised — the cursors carry the semantics (INV-002, D-16487-3). On receipt a client may take either sanctioned recovery (D-030, FR-013): splice-fill — buffer live events at cursors >= `next`, page `(after, next)` forward, discard the overlap, splice — or re-anchor through the anchored read surface. The server requires neither, cannot distinguish clients by their choice, and holds no partial-fill state. */
+export interface ViewGapParams {
+ /** The last cursor delivered before the hole — the exclusive lower bound of the undelivered range. An **opaque** view cursor: clients relay it, never parse it (tdd SS4.1). */
+ after: string;
+ /** The first cursor delivered after the hole — the exclusive upper bound of the undelivered range, and the position delivery continues from. An **opaque** view cursor: clients relay it, never parse it (tdd SS4.1). */
+ next: string;
+ /** The session whose subscription dropped events. */
+ sessionId: string;
+}
+
+/** The `view/page` request-mode anchor (tdd SS4.7.3). Declared **open**: the tdd spells it "open string enum, v1 value `latestCompaction`". */
+export type ViewPageAnchor = "latestCompaction" | (string & {});
+
+/** The `view/page` paging direction (tdd SS4.7.3). Closed: the tdd spells exactly two values and a third would change the paging contract. */
+export type ViewPageDirection = "forward" | "backward";
+
+/** `view/page` params (tdd SS4.7.3): cursor-paged reads of the session view. */
+export interface ViewPageParams {
+ /** The cold-client request mode (D-029; spec 208 FR-008), resolved at call time to the latest installed compaction boundary. The one named exception to the SS4.1 observed-only rule. */
+ anchor?: ViewPageAnchor;
+ /** The exclusive anchor. Forward: the page starts strictly after it; omitted means from the beginning of the view. Backward: the page ends strictly before it; omitted means from the head. Mutually exclusive with `anchor` (tdd SS4.7.3; spec 208 FR-008a). */
+ cursor?: string;
+ /** Paging direction; `forward` when omitted. */
+ direction?: ViewPageDirection;
+ /** Maximum events to return, 1–1000. The server MAY return fewer (tdd SS4.7.3's short-serve rule). The 1–1000 range is ratified and now **published**: #22785 E6c is owner-ruled, so the model carries the bound and the bundle renders `minimum`/`maximum` instead of a bare `integer`. Range 1–1000 inclusive. */
+ limit: number;
+ /** The session to page. */
+ sessionId: string;
+}
+
+/** The `resolvedAnchor` echo (tdd SS4.7.3): subsequent pages pass ordinary cursors, so the anchor never needs re-resolving. */
+export interface ViewPageResolvedAnchor {
+ /** The view cursor of the resolved boundary's `compaction` event. */
+ boundaryCursor: string;
+}
+
+/** `view/page` result (tdd SS4.7.3). */
+export interface ViewPageResult {
+ /** The page's events, always ascending by `viewCursor` in both directions. Durable-sourced only; pages are contiguous and can never skip a cursor. */
+ events: UnframedViewNotification[];
+ /** The anchor for the next page in the same direction: forward, the last event's cursor; backward, the first's. `null` at the end of the view in that direction — never omitted. */
+ nextCursor: string | null;
+ /** The resolution echo, present exactly when the request used `anchor` (tdd SS4.7.3; spec 208 FR-008). */
+ resolvedAnchor?: ViewPageResolvedAnchor;
+}
+
+/** The `snapshot` object returned by `session/resume` / `session/read` (tdd SS4.9). */
+export interface ViewSnapshot {
+ /** Present exactly when `history.mode` is `anchoredSnapshot` (tdd SS2.5.2). */
+ anchor?: SnapshotAnchor;
+ /** Snapshot schema version. A client whose generated types are older than this must fall back to inline/paged history (tdd SS4.9.2, SS2.5.2). */
+ schemaVersion: number;
+ /** The complete folded view at `viewCursor` (tdd SS4.9.1). */
+ state: SnapshotState;
+ /** The cursor the state is folded at; every event after it streams as the suffix (tdd SS4.9). */
+ viewCursor: string;
+}
+
+/** `view/subscribe` params (tdd SS4.7.1): attach this connection's live view subscription for a session at an explicit cursor — the fine-grained counterpart of the SS2 auto-subscribe, and the gap-free re-attachment path after `view/unsubscribe`. It never loads a session, takes no lease, writes nothing. */
+export interface ViewSubscribeParams {
+ /** Resume cursor. When present, the server replays `(after, head]` as ordinary view notifications before any live event — one gapless cursor sequence. Omitted means "from now": no historical replay (tdd SS4.7.1). */
+ after?: string;
+ /** The session to follow. */
+ sessionId: string;
+}
+
+/** `view/subscribe` result (tdd SS4.7.1). */
+export interface ViewSubscribeResult {
+ /** The view head at subscribe time; the client knows it is live once cursors pass it. */
+ viewCursor: string;
+}
+
+/** `view/unsubscribe` params (tdd SS4.7.2): remove this connection from the session's view subscription set — the protocol's single unsubscribe operation, at the altitude that owns subscriptions (tdd SS2.5.6 points here). It does not unload the session; unloading is the idle policy (tdd SS2.8). */
+export interface ViewUnsubscribeParams {
+ /** The session to stop following. */
+ sessionId: string;
+}
+
+/** `view/unsubscribe` result (tdd SS4.7.2): the empty object. Idempotent — unsubscribing while not subscribed returns `{}`. */
+export interface ViewUnsubscribeResult {}
+
+/** `workflow/cancel` params (tdd SS3.19): cancel a live workflow run. */
+export interface WorkflowCancelParams {
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The target session. */
+ sessionId: string;
+ /** The run to cancel, exactly as the `workflow` item names it (SS4.5.8); required, non-empty. */
+ workflowRunId: string;
+}
+
+/** One workflow child's folded state (tdd SS4.5.8, `WorkflowChildLifecycleFact`), keyed by `(childId, attempt)`. */
+export interface WorkflowChild {
+ /** The attempt number. */
+ attempt: number;
+ /** The child's id within the run. */
+ childId: string;
+ /** The child's observed duration, when recorded. */
+ durationMs?: number;
+ /** The child's display label, when recorded. */
+ label?: string;
+ /** The child's phase, when recorded. */
+ phase?: string;
+ /** The child's recorded result reference, verbatim, when present — an opaque string, matching the durable owner. */
+ resultRef?: string;
+ /** camelCased `WorkflowChildLifecycleStatus`, verbatim (durable runtime vocabulary). */
+ status: string;
+ /** The child's terminal, turn vocabulary (tdd SS4.5.8). */
+ terminal?: TurnTerminal;
+ /** The child's observed usage, when recorded. */
+ usage?: TokenUsage;
+}
+
+/** Which control to apply to the child's current attempt (tdd SS3.20). Closed on the wire: an unknown value is `-32602 invalidParams`. */
+export type WorkflowChildAction = "skip" | "retry";
+
+/** `workflow/childControl` params (tdd SS3.20): skip or retry one workflow child, keyed by the `(childId, attempt)` pair the `workflow` item's `children[]` carries. */
+export interface WorkflowChildControlParams {
+ /** The control to apply. */
+ action: WorkflowChildAction;
+ /** The child's CURRENT attempt (integer >= 1). A stale value rejects `"stale_attempt"`; re-read the item and re-key — never guess. Minimum 1. */
+ attempt: number;
+ /** The child, from the item's `children[]`; required, non-empty. */
+ childId: string;
+ /** The SS3.1.1 idempotency handle (UUIDv7). */
+ commandId: string;
+ /** The target session. */
+ sessionId: string;
+ /** The run owning the child (SS4.5.8); required, non-empty. */
+ workflowRunId: string;
+}
+
+/** The shared SS3.19/SS3.20 admission-only ack: deliberately bare `{commandId, status}` — settlement arrives as the workflow item's view events, never through the ack. */
+export interface WorkflowControlResult {
+ /** Echoes the client's id. */
+ commandId: string;
+ /** Admission status. */
+ status: CommandStatus;
+}
+
+/** Every wire method in this schema (SS1.9 index). */
+export type MspMethod =
+ | "initialize"
+ | "subagent/sendMessage"
+ | "subagent/followupTask"
+ | "subagent/interrupt"
+ | "subagent/stop"
+ | "subagent/resume"
+ | "subagent/reopen"
+ | "subagent/close"
+ | "subagent/readResult"
+ | "session/start"
+ | "session/resume"
+ | "session/fork"
+ | "session/list"
+ | "session/read"
+ | "turn/start"
+ | "turn/steer"
+ | "turn/interrupt"
+ | "turn/cancel"
+ | "turn/unqueue"
+ | "session/compact"
+ | "session/delete"
+ | "session/setModel"
+ | "session/rename"
+ | "session/setReasoningEffort"
+ | "session/userShell"
+ | "model/list"
+ | "skill/list"
+ | "task/background"
+ | "task/stop"
+ | "task/stopAll"
+ | "goal/set"
+ | "goal/edit"
+ | "goal/clear"
+ | "goal/pause"
+ | "goal/resume"
+ | "workflow/cancel"
+ | "workflow/childControl"
+ | "view/subscribe"
+ | "view/unsubscribe"
+ | "view/page"
+ | "item/readOutput"
+ | "approval/decide"
+ | "approval/listPending"
+ | "session/setApprovalMode"
+ | "userInput/answer"
+ | "userInput/cancel"
+ | "userInput/clarify"
+ | "usage/read";
+/** Every wire notification in this schema (SS1.9 index). */
+export type MspNotification =
+ | "initialized"
+ | "session/started"
+ | "session/closed"
+ | "session/deleteCompleted"
+ | "skill/changed"
+ | "turn/started"
+ | "turn/completed"
+ | "turn/retracted"
+ | "turn/retryScheduled"
+ | "turn/unqueued"
+ | "item/started"
+ | "item/updated"
+ | "item/delta"
+ | "item/completed"
+ | "view/gap"
+ | "approval/requested"
+ | "approval/updated"
+ | "approval/resolved"
+ | "userInput/requested"
+ | "userInput/settled"
+ | "session/modelChanged"
+ | "session/reasoningEffortChanged"
+ | "session/statusChanged"
+ | "session/goalChanged"
+ | "session/todoListChanged"
+ | "session/branchChanged"
+ | "session/tokenUsage"
+ | "session/contextUsage"
+ | "session/approvalModeChanged"
+ | "session/modelRouteUnserved"
+ | "session/nameChanged"
+ | "session/viewHealthChanged"
+ | "session/listChanged"
+ | "usage/changed";
+/** Every server-initiated wire request in this schema (SS5.3/SS5.10.1 index). */
+export type MspServerRequest = "approval/request" | "userInput/request";
+/** Every error `data.kind` in this schema's error table (SS1.6) — each code's primary kind plus its override kinds. */
+export type MspErrorDataKind =
+ | "parseError"
+ | "invalidRequest"
+ | "notInitialized"
+ | "alreadyInitialized"
+ | "methodNotFound"
+ | "experimentalRequired"
+ | "invalidParams"
+ | "internal"
+ | "pageEventTooLarge"
+ | "outputResultTooLarge"
+ | "overloaded"
+ | "inputTooLarge"
+ | "capabilityRequired"
+ | "notFound"
+ | "interrupted"
+ | "cancelled"
+ | "sessionNotFound"
+ | "sessionInUse"
+ | "sessionAmbiguous"
+ | "forkBoundaryInvalid"
+ | "sessionNotLoaded"
+ | "sessionStreamMismatch"
+ | "commandRejected"
+ | "backpressured"
+ | "skillNotFound"
+ | "viewTruncated"
+ | "outputUnavailable"
+ | "boundaryPruned"
+ | "boundaryUnusable"
+ | "noBoundary"
+ | "approvalNotFound"
+ | "approvalAlreadyResolved"
+ | "approvalChoiceInvalid"
+ | "approvalRequirementStale"
+ | "approvalReviewerUnavailable"
+ | "userInputNotFound"
+ | "userInputAlreadySettled"
+ | "userInputAnswerInvalid";
diff --git a/plugins/muse-provider/server/provider.ts b/plugins/muse-provider/server/provider.ts
new file mode 100644
index 0000000000..10e000b0c1
--- /dev/null
+++ b/plugins/muse-provider/server/provider.ts
@@ -0,0 +1,223 @@
+import {
+ negotiateProviderCapabilities,
+ requireProviderCapabilities,
+ type ProviderConnection,
+ type ProviderEvent,
+ type ProviderInput,
+ type ProviderLaunch,
+ type ProviderRegistration,
+ type ProviderStatus,
+} from "@getpaseo/plugin/server/provider";
+import type { PluginSettings } from "@getpaseo/plugin/server";
+import { serveArgs } from "./settings.js";
+import { settingsSchema } from "../shared/settings.js";
+import { Usage } from "./usage.js";
+import { execFile } from "node:child_process";
+import { Catalog, launchKey } from "./catalog.js";
+import { MspConnection } from "./connection.js";
+import { MuseError, actionableError } from "./errors.js";
+import { Sessions } from "./sessions.js";
+import { Session } from "./session.js";
+import { accountSchema } from "./wire.js";
+
+const capabilities = [
+ "prompt.message",
+ "prompt.command",
+ "prompt.image",
+ "prompt.steer",
+ "session.configure",
+ "session.persistence",
+ "permission",
+ "session.list",
+] as const;
+
+export function createMuseProvider(
+ settings: PluginSettings,
+ usage: Usage,
+): ProviderRegistration {
+ return {
+ id: "muse",
+ label: "Muse Code",
+ icon: "icon.svg",
+ command: ["muse"],
+ async getCatalogCacheKey(options) {
+ return launchKey(requireLaunch(options.launch));
+ },
+ async status({ launch }) {
+ if (!launch)
+ return { available: false, diagnostic: "Install Muse Code and ensure `muse` is on PATH." };
+ usage.remember(launch);
+ return status(launch);
+ },
+ async connect(request) {
+ if (!request.versions.includes(1))
+ throw new MuseError("protocol", "Provider protocol version 1 is required");
+ usage.remember(requireLaunch(request.launch));
+ return connect(
+ requireLaunch(request.launch),
+ negotiateProviderCapabilities(request.capabilities, capabilities),
+ settings,
+ usage,
+ );
+ },
+ };
+}
+function requireLaunch(launch: ProviderLaunch | undefined): ProviderLaunch {
+ if (!launch) throw new MuseError("missingLaunch", "Muse requires a daemon-resolved executable");
+ return launch;
+}
+async function status(launch: ProviderLaunch): Promise {
+ let host: MspConnection | undefined;
+ try {
+ const versionText = await new Promise((resolve, reject) => {
+ execFile(
+ launch.command,
+ [...launch.args, "--version"],
+ { env: launch.env, timeout: 3000, maxBuffer: 8192 },
+ (error, stdout) => {
+ if (error) reject(new MuseError("version", error.message));
+ else resolve(stdout);
+ },
+ );
+ });
+ const match = /\b(\d+)\.(\d+)\.(\d+)\b/.exec(versionText);
+ if (!match) return { available: false, diagnostic: "Muse returned an unrecognized version." };
+ const major = Number(match[1]);
+ const minor = Number(match[2]);
+ if (major < 1 || (major === 1 && minor < 3))
+ return { available: false, diagnostic: `Update Muse Code: found ${match[0]}, need ≥1.3.0` };
+ host = new MspConnection({ launch, timeoutMs: 3000 });
+ await host.initialize();
+ const account = await host.request("account/read", {}, accountSchema);
+ if (account.state === "loggedOut")
+ return { available: false, diagnostic: "Run `muse login` or set META_API_KEY" };
+ return { available: true };
+ } catch (error) {
+ return { available: false, diagnostic: actionableError(error, launch).message };
+ } finally {
+ await host?.close();
+ }
+}
+function connect(
+ launch: ProviderLaunch,
+ negotiated: readonly string[],
+ settings: PluginSettings,
+ usage: Usage,
+): ProviderConnection {
+ const listeners = new Set<(event: ProviderEvent) => void>();
+ const sessions = new Map();
+ const catalog = new Catalog();
+ const imports = new Sessions();
+ let closed = false;
+ function emit(event: ProviderEvent): void {
+ if (!closed) for (const listener of listeners) listener(event);
+ }
+ async function dispatch(input: ProviderInput): Promise {
+ if (input.type === "sessions") {
+ emit({
+ type: "sessions",
+ requestId: input.requestId,
+ sessions: await imports.list(launch, input),
+ });
+ return;
+ }
+ if (input.type === "catalog") {
+ emit({ type: "catalog", requestId: input.requestId, catalog: await catalog.read(launch) });
+ return;
+ }
+ if (input.type === "session.open") {
+ if (sessions.has(input.sessionId))
+ throw new MuseError("duplicateSession", "Muse session is already open");
+ const session = new Session({
+ id: input.sessionId,
+ config: input.config,
+ launch,
+ emit,
+ capabilities: negotiated,
+ serveArgs: await serveArgs(settings),
+ });
+ sessions.set(input.sessionId, session);
+ try {
+ await session.open(input);
+ usage.attach(
+ input.sessionId,
+ { ...launch, env: { ...launch.env, ...input.config.env } },
+ () => session.readUsage(),
+ );
+ } catch (error) {
+ sessions.delete(input.sessionId);
+ await session.close();
+ throw error;
+ }
+ return;
+ }
+ if (!("sessionId" in input))
+ throw new MuseError("unsupported", `Muse does not support ${input.type}`);
+ const session = sessions.get(input.sessionId);
+ if (!session) throw new MuseError("unknownSession", "Muse session is not open");
+ switch (input.type) {
+ case "session.prompt":
+ await session.prompt(input.prompt);
+ return;
+ case "session.configure":
+ await session.configure(input.changes);
+ break;
+ case "session.permission":
+ await session.answer(input.permissionId, input.response);
+ return;
+ case "session.interrupt":
+ await session.interrupt();
+ break;
+ case "session.close":
+ await session.close();
+ sessions.delete(input.sessionId);
+ usage.detach(input.sessionId);
+ emit({ type: "session.closed", sessionId: input.sessionId });
+ break;
+ default:
+ throw new MuseError("unsupported", `Muse does not support ${input.type}`);
+ }
+ if ("requestId" in input) emit({ type: "request.completed", requestId: input.requestId });
+ }
+ function failed(input: ProviderInput, failure: unknown): void {
+ const error = actionableError(failure, launch);
+ if (input.type === "session.prompt")
+ emit({
+ type: "session.prompt_result",
+ sessionId: input.sessionId,
+ clientMessageId: input.prompt.clientMessageId,
+ result: { type: "failed", error },
+ });
+ else if ("requestId" in input)
+ emit({ type: "request.failed", requestId: input.requestId, error });
+ else if ("sessionId" in input)
+ emit({ type: "session.runtime_failed", sessionId: input.sessionId, error });
+ }
+ return {
+ version: 1,
+ capabilities: negotiated,
+ async send(input) {
+ if (closed) throw new MuseError("closed", "Muse connection is closed");
+ requireProviderCapabilities(negotiated, input);
+ queueMicrotask(() => {
+ if (!closed) void dispatch(input).catch((error: unknown) => failed(input, error));
+ });
+ },
+ onEvent(listener) {
+ listeners.add(listener);
+ return () => listeners.delete(listener);
+ },
+ async close() {
+ if (closed) return;
+ closed = true;
+ await Promise.all([
+ catalog.close(),
+ imports.close(),
+ ...[...sessions.values()].map((session) => session.close()),
+ ]);
+ for (const id of sessions.keys()) usage.detach(id);
+ sessions.clear();
+ listeners.clear();
+ },
+ };
+}
diff --git a/plugins/muse-provider/server/questions.ts b/plugins/muse-provider/server/questions.ts
new file mode 100644
index 0000000000..cf05f358b9
--- /dev/null
+++ b/plugins/muse-provider/server/questions.ts
@@ -0,0 +1,86 @@
+import type { ProviderEvent, ProviderPermissionResponse } from "@getpaseo/plugin/server/provider";
+import type { z } from "zod";
+import { MspConnection } from "./connection.js";
+import { MuseError } from "./errors.js";
+import { ackSchema, questionSchema, questionAnswersSchema, settledQuestionSchema } from "./wire.js";
+
+export class Questions {
+ private readonly pending = new Map>();
+ private readonly settled = new Set();
+ constructor(
+ private readonly host: MspConnection,
+ private readonly sessionId: string,
+ private readonly id: string,
+ private readonly emit: (event: ProviderEvent) => void,
+ ) {}
+
+ requested(input: unknown): void {
+ const request = questionSchema.parse(input);
+ if (this.settled.has(request.userInputId)) return;
+ this.pending.set(request.userInputId, request);
+ this.emit({
+ type: "session.permission",
+ sessionId: this.id,
+ request: {
+ id: request.userInputId,
+ name: request.toolName,
+ kind: "question",
+ input: {
+ questions: request.questions.map((question) => ({
+ id: question.id,
+ header: question.header,
+ question: question.question,
+ options: question.options,
+ multiSelect: question.selection.mode === "multiple",
+ allowOther: true,
+ allowEmpty: question.selection.minSelections === 0,
+ })),
+ },
+ },
+ });
+ }
+ resolved(input: unknown): void {
+ const { userInputId } = settledQuestionSchema.parse(input);
+ this.settled.add(userInputId);
+ this.pending.delete(userInputId);
+ this.emit({
+ type: "session.permission_resolved",
+ sessionId: this.id,
+ permissionId: userInputId,
+ });
+ }
+ async answer(id: string, response: ProviderPermissionResponse): Promise {
+ const request = this.pending.get(id);
+ if (!request) return false;
+ if (response.behavior === "deny") {
+ await this.host.command(
+ "userInput/cancel",
+ { sessionId: this.sessionId, userInputId: id, reason: response.message },
+ ackSchema,
+ );
+ return true;
+ }
+ const supplied = questionAnswersSchema.parse(response.updatedInput);
+ const answers = request.questions.map((question) => {
+ const text = supplied.answers[question.header];
+ if (text === undefined) throw new MuseError("missingAnswer", `Answer ${question.header}`);
+ if (question.selection.mode === "single")
+ return question.options.some((option) => option.label === text)
+ ? { questionId: question.id, selectedLabel: text }
+ : { questionId: question.id, freeText: text };
+ const labels = text
+ .split(",")
+ .map((label) => label.trim())
+ .filter(Boolean);
+ if (labels.every((label) => question.options.some((option) => option.label === label)))
+ return { questionId: question.id, selectedLabels: labels };
+ return { questionId: question.id, freeText: text };
+ });
+ await this.host.command(
+ "userInput/answer",
+ { sessionId: this.sessionId, userInputId: id, answers },
+ ackSchema,
+ );
+ return true;
+ }
+}
diff --git a/plugins/muse-provider/server/recovery.ts b/plugins/muse-provider/server/recovery.ts
new file mode 100644
index 0000000000..0218ef47c4
--- /dev/null
+++ b/plugins/muse-provider/server/recovery.ts
@@ -0,0 +1,45 @@
+import type { z } from "zod";
+import { MspConnection, type Notification } from "./connection.js";
+import { pageSchema } from "./wire.js";
+
+// Two minutes accommodates slow model/tool work; polling repairs a lost live view without cancelling it.
+const SILENCE_MS = 2 * 60 * 1000;
+export class Recovery {
+ private timer: ReturnType | undefined;
+ private active = false;
+ private closed = false;
+ private cursor: string;
+ constructor(
+ private readonly host: MspConnection,
+ private readonly sessionId: string,
+ cursor: string,
+ private readonly apply: (event: Notification) => Promise,
+ private readonly onSilent: () => void,
+ ) {
+ this.cursor = cursor;
+ }
+
+ activity(cursor: string | undefined, active: boolean): void {
+ if (cursor !== undefined) this.cursor = cursor;
+ this.active = active;
+ clearTimeout(this.timer);
+ if (active && !this.closed) this.timer = setTimeout(this.onSilent, SILENCE_MS);
+ }
+ async backfill(after = this.cursor): Promise {
+ let cursor: string | null = after;
+ do {
+ const page: z.infer = await this.host.request(
+ "view/page",
+ { sessionId: this.sessionId, cursor, direction: "forward", limit: 1000 },
+ pageSchema,
+ );
+ for (const event of page.events) await this.apply(event);
+ cursor = page.nextCursor;
+ } while (cursor !== null && !this.closed);
+ this.activity(undefined, this.active);
+ }
+ close(): void {
+ this.closed = true;
+ clearTimeout(this.timer);
+ }
+}
diff --git a/plugins/muse-provider/server/session.ts b/plugins/muse-provider/server/session.ts
new file mode 100644
index 0000000000..b152361060
--- /dev/null
+++ b/plugins/muse-provider/server/session.ts
@@ -0,0 +1,635 @@
+import type {
+ ProviderEvent,
+ ProviderInput,
+ ProviderLaunch,
+ ProviderPersistence,
+ ProviderSessionConfig,
+ ProviderConfigChanges,
+ ProviderPrompt,
+ ProviderPermissionResponse,
+ ProviderMcpServerConfig,
+ ProviderCatalog,
+ ProviderToolCallDetail,
+} from "@getpaseo/plugin/server/provider";
+import type { z } from "zod";
+import { MspConnection, commandId, type Notification } from "./connection.js";
+import { MuseError, actionableError } from "./errors.js";
+import { Timeline, todoItem } from "./timeline.js";
+import { modes, efforts, presentCatalog } from "./catalog.js";
+import {
+ pendingSchema,
+ itemNotificationSchema,
+ approvalResolvedSchema,
+ usageSchema,
+ ackSchema,
+ gapSchema,
+ catalogSchema,
+ approvalModeSchema,
+ approvalSchema,
+ deltaSchema,
+ effortSchema,
+ notificationSchema,
+ persistenceSchema,
+ promptResultSchema,
+ sessionSchema,
+ turnSchema,
+ tokenUsageSchema,
+ contextUsageSchema,
+ type WireItem,
+ type WireApproval,
+} from "./wire.js";
+import type { SessionMcpServerConfig, TurnStartParams } from "./msp.js";
+
+import { Children } from "./children.js";
+import { Recovery } from "./recovery.js";
+import { Questions } from "./questions.js";
+import { Commands } from "./commands.js";
+
+interface SessionOptions {
+ serveArgs: string[];
+ id: string;
+ config: ProviderSessionConfig;
+ launch: ProviderLaunch;
+ emit(event: ProviderEvent): void;
+ capabilities: readonly string[];
+}
+
+interface Live {
+ nativeId: string;
+ timeline: Timeline;
+ children: Children;
+ questions: Questions;
+ commands: Commands;
+ recovery: Recovery;
+}
+
+export class Session {
+ private readonly host: MspConnection;
+ private liveState: Live | undefined;
+ private providerId = "meta";
+ private cursor: string | undefined;
+ private config: ProviderSessionConfig;
+ private catalog: ProviderCatalog = { models: [], modes };
+ private readonly approvals = new Map();
+ private readonly messages = new Map();
+ private readonly turns = new Map();
+ private notifications: Promise = Promise.resolve();
+ private readonly buffered: Notification[] = [];
+ private opening = true;
+ private closing = false;
+ private firstTurn = true;
+ private interruptCompletion: {
+ turnId: string;
+ resolve(): void;
+ reject(error: Error): void;
+ } | null = null;
+
+ constructor(private readonly options: SessionOptions) {
+ this.config = options.config;
+ this.host = new MspConnection({
+ launch: { ...options.launch, env: { ...options.launch.env, ...options.config.env } },
+ cwd: options.config.cwd,
+ serveArgs: options.serveArgs,
+ });
+ this.host.onNotification((notification) => {
+ if (this.opening) this.buffered.push(notification);
+ else this.enqueue(notification);
+ });
+ this.host.onExit((error) => {
+ if (!this.opening && !this.closing) this.runtimeFailed(error);
+ });
+ }
+
+ async open(input: Extract): Promise {
+ await this.host.initialize();
+ const mcpServers = Object.fromEntries(
+ Object.entries(this.config.mcpServers).map(([id, server]) => [id, mcpServer(server)]),
+ );
+ let response;
+ if (input.persistence) {
+ if (input.persistence.version !== 1)
+ throw new MuseError("invalidPersistence", "Unsupported Muse persistence version");
+ const saved = persistenceSchema.parse(input.persistence.data);
+ response = await this.host.command(
+ "session/resume",
+ { sessionId: saved.sessionId, cursor: saved.cursor, config: { mcpServers } },
+ sessionSchema,
+ );
+ this.config = {
+ ...this.config,
+ model: this.config.model ?? saved.model,
+ thinkingOption: this.config.thinkingOption ?? saved.thinkingOption,
+ };
+ this.firstTurn = false;
+ } else {
+ response = await this.host.command(
+ "session/start",
+ {
+ workspaceRoot: this.config.cwd,
+ modelId: this.config.model,
+ approvalMode: approvalModeSchema.parse(this.config.mode ?? "onRequest"),
+ config: { mcpServers },
+ },
+ sessionSchema,
+ );
+ }
+ if (!response.viewCursor)
+ throw new MuseError(
+ "emptyViewCursor",
+ "Muse returned an empty resume viewCursor; this session cannot be watched.",
+ );
+ const nativeId = response.session.sessionId;
+ this.liveState = {
+ nativeId,
+ children: new Children(this.host, this.options.id, this.config.cwd, this.options.emit),
+ timeline: new Timeline(
+ this.host,
+ nativeId,
+ this.options.id,
+ this.options.emit,
+ (messageCommandId) => this.messages.get(messageCommandId),
+ ),
+ questions: new Questions(this.host, nativeId, this.options.id, this.options.emit),
+ commands: new Commands(this.host, nativeId, this.options.id, this.options.emit),
+ recovery: new Recovery(
+ this.host,
+ nativeId,
+ response.viewCursor,
+ (event) => this.notify(event),
+ () => {
+ this.notifications = this.notifications
+ .then(async () => {
+ const live = this.live();
+ await live.recovery.backfill();
+ return live.children.refresh();
+ })
+ .catch((error) => this.runtimeFailed(error));
+ },
+ ),
+ };
+ this.providerId = response.session.providerId;
+ this.cursor = response.viewCursor;
+ this.config = {
+ ...this.config,
+ model: response.session.modelId,
+ mode: response.session.approvalMode?.mode ?? this.config.mode ?? "onRequest",
+ };
+ this.options.emit({
+ type: "session.opened",
+ requestId: input.requestId,
+ sessionId: this.options.id,
+ cwd: this.config.cwd,
+ restoration: "core",
+ capabilities: this.options.capabilities,
+ persistence: this.persistence(),
+ });
+ if (input.history === "replay" && response.history?.mode === "inline") {
+ if (!response.history.items)
+ throw new MuseError("invalidHistory", "Muse inline history has no items");
+ for (const item of response.history.items) await this.fold(item);
+ }
+ await this.restorePending(response.pendingRequests);
+ // Inline history precedes suffix events; replayed turn terminals do not own a fresh run.
+ this.opening = false;
+ for (const notification of this.buffered) this.enqueue(notification);
+ this.buffered.length = 0;
+ await this.notifications;
+ this.catalog = presentCatalog(
+ await this.host.request("model/list", { sessionId: this.live().nativeId }, catalogSchema),
+ );
+ const selected = this.catalog.models.find((model) => model.id === this.config.model);
+ this.config = {
+ ...this.config,
+ thinkingOption: this.config.thinkingOption ?? selected?.defaultThinkingOptionId,
+ };
+ await this.live().commands.refresh();
+ this.publishPersistence();
+ this.publishConfig();
+ this.options.emit({
+ type: "session.ready",
+ requestId: input.requestId,
+ sessionId: this.options.id,
+ });
+ }
+
+ private live(): Live {
+ if (!this.liveState) throw new MuseError("sessionNotOpen", "Muse session is not open");
+ return this.liveState;
+ }
+
+ private async restorePending(
+ pointers: z.infer["pendingRequests"],
+ ): Promise {
+ if (!pointers.some((pending) => ["approval", "userInput"].includes(pending.kind))) return;
+ const pending = await this.host.request(
+ "approval/listPending",
+ { sessionId: this.live().nativeId },
+ pendingSchema,
+ );
+ for (const approval of pending.approvals) await this.permission(approval);
+ for (const question of pending.userInputs) this.live().questions.requested(question);
+ }
+ async prompt(prompt: ProviderPrompt): Promise {
+ if (await this.live().commands.compact(prompt)) return;
+ const id = commandId();
+ this.messages.set(id, prompt.clientMessageId);
+ const input: TurnStartParams["input"] = [];
+ const text: string[] = [];
+ if (this.firstTurn && this.config.systemPrompt)
+ input.push({
+ type: "text",
+ text: `\n${this.config.systemPrompt}\n `,
+ });
+ if (prompt.input.type === "command") {
+ input.push(this.live().commands.input(prompt.input));
+ text.push(
+ `/${prompt.input.name}${prompt.input.arguments ? ` ${prompt.input.arguments}` : ""}`,
+ );
+ } else
+ for (const part of prompt.input.content) {
+ if (part.type === "text") {
+ input.push({ type: "text", text: part.text });
+ text.push(part.text);
+ } else if (part.type === "image")
+ input.push({ type: "image", base64Data: part.data, mediaType: part.mimeType });
+ else throw new MuseError("unsupported", `Muse does not support ${part.type} attachments`);
+ }
+ const params: TurnStartParams = {
+ commandId: id,
+ sessionId: this.live().nativeId,
+ input,
+ displayText: text.join("\n"),
+ ifBusy: prompt.delivery === "steer" ? "steer" : "queue",
+ reasoningEffort: this.config.thinkingOption
+ ? effortSchema.parse(this.config.thinkingOption)
+ : undefined,
+ };
+ const response = await this.host.command("turn/start", params, promptResultSchema);
+ this.firstTurn = false;
+ if (response.disposition === "started" && this.turns.get(response.turnId) !== "completed")
+ this.turns.set(response.turnId, "active");
+ this.live().recovery.activity(undefined, this.activeTurnIds().length > 0);
+ const type = response.disposition === "steered" ? "steer" : "turn";
+ this.options.emit({
+ type: "session.prompt_result",
+ sessionId: this.options.id,
+ clientMessageId: prompt.clientMessageId,
+ result: { type, turnId: response.turnId },
+ });
+ }
+ async configure(changes: ProviderConfigChanges): Promise {
+ if (changes.model !== undefined) {
+ if (!changes.model) throw new MuseError("invalidModel", "Choose a Muse model");
+ await this.host.command(
+ "session/setModel",
+ {
+ sessionId: this.live().nativeId,
+ model: { providerId: this.providerId, modelId: changes.model },
+ },
+ ackSchema,
+ );
+ this.config = { ...this.config, model: changes.model };
+ }
+ // Muse receives configured thinking effort on each turn/start, rather than a session mutation.
+ if (changes.thinkingOption !== undefined) {
+ const thinkingOption =
+ changes.thinkingOption === null ? undefined : effortSchema.parse(changes.thinkingOption);
+ this.config = { ...this.config, thinkingOption };
+ }
+ if (changes.mode !== undefined) {
+ const mode = approvalModeSchema.parse(changes.mode ?? "onRequest");
+ await this.host.command(
+ "session/setApprovalMode",
+ { sessionId: this.live().nativeId, mode },
+ ackSchema,
+ );
+ this.config = { ...this.config, mode };
+ }
+ this.publishConfig();
+ this.publishPersistence();
+ }
+ async answer(permissionId: string, response: ProviderPermissionResponse): Promise {
+ if (await this.live().questions.answer(permissionId, response)) return;
+ const approval = this.approvals.get(permissionId);
+ if (!approval)
+ throw new MuseError("approvalNotFound", "This Muse approval is no longer pending");
+ const choice = response.selectedActionId
+ ? approval.availableChoices.find(
+ (candidate) => candidate.choiceId === response.selectedActionId,
+ )
+ : (approval.availableChoices.find((candidate) =>
+ response.behavior === "allow"
+ ? candidate.decision === "approved" && candidate.scope === "once"
+ : candidate.decision === "denied" && candidate.scope === "once",
+ ) ??
+ (response.behavior === "deny"
+ ? approval.availableChoices.find(
+ (candidate) => candidate.decision === "abort" && candidate.scope === "once",
+ )
+ : undefined));
+ if (!choice)
+ throw new MuseError(
+ "invalidApprovalChoice",
+ "Choose one of Muse's available approval actions",
+ );
+ await this.decide(approval, choice.choiceId);
+ }
+ private async decide(approval: WireApproval, choiceId: string): Promise {
+ await this.host.command(
+ "approval/decide",
+ {
+ sessionId: this.live().nativeId,
+ approvalId: approval.approvalId,
+ choiceId,
+ requirementId: approval.currentRequirementId,
+ },
+ ackSchema,
+ );
+ }
+ async readUsage() {
+ return this.host.request("usage/read", {}, usageSchema);
+ }
+ async interrupt(): Promise {
+ const turnId = this.activeTurnIds().at(-1);
+ if (!turnId) return;
+ let timer: ReturnType;
+ const completion = new Promise((resolve, reject) => {
+ this.interruptCompletion = { turnId, resolve, reject };
+ timer = setTimeout(() => {
+ this.runtimeFailed(
+ new MuseError(
+ "interruptTimeout",
+ "Muse did not confirm cancellation within 10000ms. Reopen the session before sending another prompt.",
+ ),
+ );
+ void this.host.close();
+ }, 10000);
+ });
+ try {
+ await Promise.all([
+ this.host.command("turn/interrupt", { sessionId: this.live().nativeId, turnId }, ackSchema),
+ completion,
+ ]);
+ } finally {
+ clearTimeout(timer!);
+ this.interruptCompletion = null;
+ }
+ }
+ async close(): Promise {
+ this.closing = true;
+ if (this.liveState) this.live().recovery.close();
+ await this.host.close();
+ await this.notifications;
+ if (this.liveState) this.live().children.close();
+ }
+ private enqueue(notification: Notification): void {
+ this.notifications = this.notifications
+ .then(() => this.notify(notification))
+ .catch((error: unknown) => this.runtimeFailed(error));
+ }
+ private runtimeFailed(error: unknown): void {
+ this.live().recovery.close();
+ this.options.emit({
+ type: "session.runtime_failed",
+ sessionId: this.options.id,
+ error: actionableError(error, this.options.launch),
+ });
+ const interrupt = this.interruptCompletion;
+ if (interrupt) interrupt.reject(error instanceof Error ? error : new Error(String(error)));
+ }
+ private async notify(notification: Notification): Promise {
+ const envelope = notificationSchema.parse(notification.params);
+ if (envelope.sessionId && envelope.sessionId !== this.live().nativeId) {
+ await this.live().children.notify(envelope.sessionId, notification);
+ return;
+ }
+ await this.processNotification(notification);
+ this.live().recovery.activity(envelope.viewCursor, this.activeTurnIds().length > 0);
+ if (envelope.viewCursor) {
+ this.cursor = envelope.viewCursor;
+ this.publishPersistence();
+ }
+ }
+ private async processNotification(notification: Notification): Promise {
+ switch (notification.method) {
+ case "view/gap":
+ // The gap lower bound remains authoritative even if a later live event arrived first.
+ await this.live().recovery.backfill(gapSchema.parse(notification.params).after);
+ break;
+ case "userInput/requested":
+ this.live().questions.requested(notification.params);
+ break;
+ case "userInput/settled":
+ this.live().questions.resolved(notification.params);
+ break;
+ case "session/todoListChanged":
+ this.options.emit({
+ type: "timeline.item",
+ sessionId: this.options.id,
+ item: todoItem(notification.params),
+ });
+ break;
+ case "skill/changed":
+ await this.live().commands.refresh();
+ break;
+ case "item/started":
+ case "item/updated":
+ case "item/completed": {
+ const params = itemNotificationSchema.parse(notification.params);
+ await this.fold(params.item);
+ break;
+ }
+ case "item/delta":
+ this.live().timeline.delta(deltaSchema.parse(notification.params));
+ break;
+ case "approval/requested":
+ case "approval/updated":
+ await this.permission(approvalSchema.parse(notification.params));
+ break;
+ case "approval/resolved": {
+ const params = approvalResolvedSchema.parse(notification.params);
+ this.approvals.delete(params.approvalId);
+ this.options.emit({
+ type: "session.permission_resolved",
+ sessionId: this.options.id,
+ permissionId: params.approvalId,
+ });
+ break;
+ }
+ case "turn/started":
+ this.startTurn(notification.params);
+ break;
+ case "turn/completed":
+ this.completeTurn(notification.params);
+ break;
+ case "session/tokenUsage": {
+ const params = tokenUsageSchema.parse(notification.params);
+ this.options.emit({
+ type: "session.usage",
+ sessionId: this.options.id,
+ usage: {
+ inputTokens: params.cumulative.promptTokens,
+ outputTokens: params.cumulative.outputTokens,
+ cachedInputTokens: params.usage?.cachedTokens,
+ },
+ });
+ break;
+ }
+ case "session/contextUsage": {
+ const params = contextUsageSchema.parse(notification.params);
+ this.options.emit({
+ type: "session.usage",
+ sessionId: this.options.id,
+ usage: {
+ contextWindowUsedTokens: params.usedTokens,
+ contextWindowMaxTokens: params.windowTokens,
+ },
+ });
+ break;
+ }
+ }
+ }
+ private startTurn(input: unknown): void {
+ const params = turnSchema.parse(input);
+ if (
+ params.commandId &&
+ this.messages.has(params.commandId) &&
+ this.turns.get(params.turnId) !== "completed"
+ ) {
+ this.turns.set(params.turnId, "active");
+ this.options.emit({
+ type: "session.turn",
+ sessionId: this.options.id,
+ turnId: params.turnId,
+ state: "started",
+ });
+ }
+ }
+ private activeTurnIds(): string[] {
+ return [...this.turns].filter(([, state]) => state === "active").map(([id]) => id);
+ }
+ private completeTurn(input: unknown): void {
+ const params = turnSchema.parse(input);
+ if (this.turns.get(params.turnId) !== "active") return;
+ this.turns.set(params.turnId, "completed");
+ let state: "completed" | "canceled" | "failed" = "completed";
+ let error;
+ if (params.terminal === "cancelled") state = "canceled";
+ else if (params.error || params.terminal === "failed") {
+ state = "failed";
+ error = params.error
+ ? actionableError(
+ new MuseError(params.error.kind, params.error.message),
+ this.options.launch,
+ )
+ : { message: "Muse turn failed" };
+ }
+ this.options.emit({
+ type: "session.turn",
+ sessionId: this.options.id,
+ turnId: params.turnId,
+ state,
+ error,
+ });
+ if (this.interruptCompletion?.turnId === params.turnId) this.interruptCompletion.resolve();
+ }
+
+ private async fold(item: WireItem): Promise {
+ if (await this.live().timeline.fold(item)) await this.live().children.update(item);
+ }
+ private async permission(approval: WireApproval): Promise {
+ const current = approval.subject.stages.find(
+ (stage) => stage.requirementId.sourceIndex === approval.currentRequirementId?.sourceIndex,
+ );
+ if (current && current.resolution.kind !== "unresolved") return;
+ this.approvals.set(approval.approvalId, approval);
+ if (this.config.mode === "allowAll") {
+ const choice = approval.availableChoices.find(
+ (candidate) => candidate.decision === "approved" && candidate.scope === "once",
+ );
+ if (!choice)
+ throw new MuseError("noAllowOnceChoice", "Muse escalation has no allow-once action");
+ await this.decide(approval, choice.choiceId);
+ return;
+ }
+ let title = approval.toolName;
+ if (current) title = `Stage ${current.position} of ${current.totalStages}`;
+ let detail: ProviderToolCallDetail;
+ const subject = approval.subject;
+ if (subject.kind === "shell")
+ detail = {
+ type: "shell",
+ command: current ? current.argv.join(" ") : subject.command,
+ cwd: subject.workspaceRoot,
+ };
+ else if (subject.kind === "fileAccess") detail = { type: "edit", filePath: subject.path };
+ else
+ detail = {
+ type: "plain_text",
+ label: subject.kind,
+ text: subject.host || subject.path || subject.command,
+ };
+ const actions = approval.availableChoices.map((choice) => {
+ const behavior = choice.decision.startsWith("approved") ? "allow" : "deny";
+ return { id: choice.choiceId, label: choice.label, behavior } as const;
+ });
+ this.options.emit({
+ type: "session.permission",
+ sessionId: this.options.id,
+ request: {
+ id: approval.approvalId,
+ name: approval.toolName,
+ kind: "tool",
+ title,
+ detail,
+ actions,
+ },
+ });
+ }
+ private persistence(): ProviderPersistence {
+ return {
+ version: 1,
+ data: {
+ sessionId: this.live().nativeId,
+ ...(this.cursor ? { cursor: this.cursor } : {}),
+ ...(this.config.model ? { model: this.config.model } : {}),
+ ...(this.config.thinkingOption ? { thinkingOption: this.config.thinkingOption } : {}),
+ },
+ };
+ }
+ private publishPersistence(): void {
+ this.options.emit({
+ type: "session.persistence",
+ sessionId: this.options.id,
+ persistence: this.persistence(),
+ });
+ }
+ private publishConfig(): void {
+ this.options.emit({
+ type: "session.config",
+ sessionId: this.options.id,
+ config: {
+ model: this.config.model,
+ mode: this.config.mode,
+ thinkingOption: this.config.thinkingOption,
+ models: this.catalog.models,
+ modes,
+ thinkingOptions:
+ this.catalog.models.find((model) => model.id === this.config.model)?.thinkingOptions ??
+ efforts.map((id) => ({ id, label: id })),
+ settings: [],
+ },
+ });
+ }
+}
+function mcpServer(server: ProviderMcpServerConfig): SessionMcpServerConfig {
+ if (server.type === "stdio")
+ return {
+ transport: "stdio",
+ command: server.command,
+ args: server.args,
+ env: server.env,
+ framing: "lineDelimitedJson",
+ };
+ return { transport: "streamableHttp", url: server.url, headers: server.headers };
+}
diff --git a/plugins/muse-provider/server/sessions.ts b/plugins/muse-provider/server/sessions.ts
new file mode 100644
index 0000000000..93a22cd54b
--- /dev/null
+++ b/plugins/muse-provider/server/sessions.ts
@@ -0,0 +1,57 @@
+import type { z } from "zod";
+import type {
+ ProviderInput,
+ ProviderLaunch,
+ ProviderSessionSummary,
+} from "@getpaseo/plugin/server/provider";
+import { MspConnection } from "./connection.js";
+import { sessionListSchema } from "./wire.js";
+
+export class Sessions {
+ private readonly hosts = new Set();
+ async list(
+ launch: ProviderLaunch,
+ input: Extract,
+ ): Promise {
+ const host = new MspConnection({ launch });
+ this.hosts.add(host);
+ try {
+ await host.initialize();
+ const summaries: ProviderSessionSummary[] = [];
+ let cursor: string | null = null;
+ do {
+ const page: z.infer = await host.request(
+ "session/list",
+ { workspaceRoot: input.cwd, limit: Math.min(input.limit ?? 50, 200), cursor },
+ sessionListSchema,
+ );
+ for (const session of page.sessions) {
+ if (session.workspaceRoot === null) continue;
+ if (
+ input.query &&
+ !(session.title ?? "").toLowerCase().includes(input.query.toLowerCase())
+ )
+ continue;
+ summaries.push({
+ cwd: session.workspaceRoot,
+ title: session.title,
+ updatedAt: session.updatedAt,
+ persistence: {
+ version: 1,
+ data: { sessionId: session.sessionId, model: session.modelId },
+ },
+ });
+ if (input.limit && summaries.length >= input.limit) return summaries;
+ }
+ cursor = page.nextCursor;
+ } while (cursor !== null);
+ return summaries;
+ } finally {
+ await host.close();
+ this.hosts.delete(host);
+ }
+ }
+ async close(): Promise {
+ await Promise.all([...this.hosts].map((host) => host.close()));
+ }
+}
diff --git a/plugins/muse-provider/server/settings.ts b/plugins/muse-provider/server/settings.ts
new file mode 100644
index 0000000000..21586834ce
--- /dev/null
+++ b/plugins/muse-provider/server/settings.ts
@@ -0,0 +1,17 @@
+import type { PluginSettings } from "@getpaseo/plugin/server";
+import { settingsSchema } from "../shared/settings.js";
+import { MuseError } from "./errors.js";
+
+export async function serveArgs(
+ settings: PluginSettings,
+): Promise {
+ const state = await settings.read();
+ if (state.status === "invalid") throw new MuseError("invalidSettings", state.error);
+ const { sandbox, network, trustWorkspace } = state.values;
+ return [
+ "--sandbox-network",
+ network,
+ ...(sandbox ? [] : ["--disable-sandbox"]),
+ ...(trustWorkspace ? ["--trust-workspace"] : []),
+ ];
+}
diff --git a/plugins/muse-provider/server/timeline.ts b/plugins/muse-provider/server/timeline.ts
new file mode 100644
index 0000000000..df786df125
--- /dev/null
+++ b/plugins/muse-provider/server/timeline.ts
@@ -0,0 +1,234 @@
+import { MspConnection } from "./connection.js";
+import { MuseError } from "./errors.js";
+import { todoSchema, outputSchema } from "./wire.js";
+import type { ProviderEvent } from "@getpaseo/plugin/server/provider";
+import type { z } from "zod";
+import type {
+ ProviderTimelineItem,
+ ProviderToolCallDetail,
+} from "@getpaseo/plugin/server/provider";
+import { patchSchema, toolArgsSchema, deltaSchema, type WireItem } from "./wire.js";
+
+export function unifiedDiff(content: string): string {
+ const patch = patchSchema.parse(JSON.parse(content));
+ return patch.files
+ .map((file) => {
+ const hunks = file.hunks.map(
+ (hunk) =>
+ `@@ -${hunk.oldStart},${hunk.oldLines} +${hunk.newStart},${hunk.newLines} @@\n${hunk.lines.join("\n")}\n`,
+ );
+ return `--- a/${file.path}\n+++ b/${file.path}\n${hunks.join("")}`;
+ })
+ .join("");
+}
+
+function toolDetail(item: WireItem, patch?: string): ProviderToolCallDetail {
+ const parsed = toolArgsSchema.safeParse(parseArguments(item.args));
+ if (!parsed.success) return { type: "unknown", input: item.args, output: item.visibleOutput };
+ const args = parsed.data;
+ switch (item.tool) {
+ case "workflow":
+ case "subagent_spawn":
+ case "subagent_wait":
+ case "subagent_read_result":
+ return subAgentDetail(item, args);
+ case "shell":
+ case "bash":
+ return {
+ type: "shell",
+ command: item.commandText ?? args.command,
+ output: item.visibleOutput,
+ exitCode: item.exitCode,
+ };
+ case "read_file":
+ return { type: "read", filePath: args.path, content: item.visibleOutput };
+ case "edit_file":
+ return {
+ type: "edit",
+ filePath: args.path,
+ oldString: args.find,
+ newString: args.replace,
+ unifiedDiff: patch,
+ };
+ case "write_file":
+ return { type: "write", filePath: args.path, content: args.content };
+ case "grep":
+ case "glob":
+ case "ls":
+ case "web_search":
+ return {
+ type: "search",
+ query: args.query || args.pattern || args.path,
+ content: item.visibleOutput,
+ };
+ case "web_fetch":
+ return { type: "fetch", url: args.url, result: item.visibleOutput };
+ default:
+ return { type: "unknown", input: item.args, output: item.visibleOutput };
+ }
+}
+function subAgentDetail(
+ item: WireItem,
+ args: z.infer,
+): ProviderToolCallDetail {
+ return {
+ type: "sub_agent",
+ description: item.objective ?? item.entryId ?? args.objective,
+ subAgentType: item.role ?? args.role,
+ childSessionId: item.childSessionId,
+ log: item.message || item.visibleOutput || item.fallbackText,
+ };
+}
+
+function parseArguments(args: string): unknown {
+ try {
+ return JSON.parse(args);
+ } catch {
+ return args;
+ }
+}
+
+export function timelineItem(
+ item: WireItem,
+ clientMessageId?: string,
+ patch?: string,
+): ProviderTimelineItem {
+ const id = item.itemId;
+ switch (item.kind) {
+ case "userMessage":
+ return { type: "user_message", id, text: item.displayText ?? item.text, clientMessageId };
+ case "agentMessage":
+ return { type: "assistant_message", id, text: item.text };
+ case "reasoning":
+ return { type: "reasoning", id, text: item.summary.join("\n") };
+ case "compaction":
+ return {
+ type: "compaction",
+ id,
+ status: item.status === "inProgress" ? "loading" : "completed",
+ preTokens: item.tokensBefore,
+ };
+ case "workflow":
+ case "subagent":
+ case "toolCall": {
+ return toolCallItem(item, patch);
+ }
+ default:
+ return {
+ type: "tool_call",
+ id,
+ callId: id,
+ name: item.kind,
+ status: "completed",
+ error: null,
+ detail: { type: "plain_text", label: item.kind, text: item.fallbackText },
+ };
+ }
+}
+
+function toolCallItem(item: WireItem, patch?: string): ProviderTimelineItem {
+ const id = item.itemId;
+ const base = {
+ type: "tool_call",
+ id,
+ callId: item.callId ?? id,
+ name: item.kind === "toolCall" ? item.tool : item.kind,
+ detail:
+ item.kind === "subagent" || item.kind === "workflow"
+ ? {
+ type: "sub_agent" as const,
+ subAgentType: item.role,
+ description: item.objective ?? item.entryId,
+ childSessionId: item.childSessionId,
+ log: item.message || item.visibleOutput || item.fallbackText,
+ }
+ : toolDetail(item, patch),
+ } as const;
+ if (item.status === "inProgress") return { ...base, status: "running", error: null };
+ if (item.status === "cancelled") return { ...base, status: "canceled", error: null };
+ if (item.status !== "completed")
+ return { ...base, status: "failed", error: item.failureReason ?? item.status };
+ return { ...base, status: "completed", error: null };
+}
+
+export function appendDelta(
+ previous: WireItem,
+ delta: z.infer,
+): WireItem | null {
+ if (delta.field === "text") return { ...previous, text: previous.text + delta.delta };
+ if (delta.field === "output")
+ return { ...previous, visibleOutput: previous.visibleOutput + delta.delta };
+ const match = /^summary\.(\d+)$/.exec(delta.field);
+ if (!match) return null;
+ const index = Number(match[1]);
+ const summary = [...previous.summary];
+ summary[index] = (summary[index] ?? "") + delta.delta;
+ return { ...previous, summary };
+}
+
+export class Timeline {
+ private readonly items = new Map();
+ constructor(
+ private readonly host: MspConnection,
+ private readonly nativeId: string,
+ private readonly id: string,
+ private readonly emit: (event: ProviderEvent) => void,
+ private readonly clientMessage: (commandId: string) => string | undefined = () => undefined,
+ ) {}
+ async fold(item: WireItem): Promise {
+ // Reminder children are Muse housekeeping, not agent work or navigable subagents.
+ if (item.kind === "reminderChild") return false;
+ const previous = this.items.get(item.itemId);
+ if (previous && previous.revision >= item.revision) return false;
+ let patch;
+ if (item.patchRef && item.status === "completed") {
+ const output = await this.host.request(
+ "item/readOutput",
+ { sessionId: this.nativeId, itemId: item.itemId, outputRef: item.patchRef.id },
+ outputSchema,
+ );
+ if (output.encoding !== "utf8" || !output.eof)
+ throw new MuseError("invalidPatch", "Muse edit patch is not a complete UTF-8 document");
+ patch = unifiedDiff(output.content);
+ }
+ this.items.set(item.itemId, item);
+ this.emit({
+ type: "timeline.item",
+ sessionId: this.id,
+ item: timelineItem(
+ item,
+ item.commandId ? this.clientMessage(item.commandId) : undefined,
+ patch,
+ ),
+ timestamp: item.recordedAt,
+ });
+ return true;
+ }
+ delta(delta: z.infer): void {
+ const previous = this.items.get(delta.itemId);
+ if (!previous || previous.status !== "inProgress") return;
+ const item = appendDelta(previous, delta);
+ if (!item) return;
+ this.items.set(item.itemId, item);
+ this.emit({ type: "timeline.item", sessionId: this.id, item: timelineItem(item) });
+ }
+}
+
+export function todoItem(input: unknown): ProviderTimelineItem {
+ const todo = todoSchema.parse(input);
+ return {
+ type: "todo",
+ id: `todo:${todo.viewCursor}`,
+ items: todo.items.map((item) => {
+ let status: "pending" | "in_progress" | "completed" = "pending";
+ if (item.status === "inProgress") status = "in_progress";
+ else if (item.status === "completed") status = "completed";
+ return {
+ text: item.text,
+ completed: item.status === "completed",
+ status,
+ activeForm: item.activeForm,
+ };
+ }),
+ };
+}
diff --git a/plugins/muse-provider/server/usage.ts b/plugins/muse-provider/server/usage.ts
new file mode 100644
index 0000000000..a60b0a34b2
--- /dev/null
+++ b/plugins/muse-provider/server/usage.ts
@@ -0,0 +1,111 @@
+import { homedir } from "node:os";
+import path from "node:path";
+import { z } from "zod";
+import type { UsageSourceRegistration } from "@getpaseo/plugin/server";
+import type { ProviderLaunch } from "@getpaseo/plugin/server/provider";
+import {
+ hashAccountKey,
+ unavailableUsage,
+ windowFromUsedPct,
+ toneFromUsedPct,
+} from "@getpaseo/plugin/server/usage";
+
+import { MspConnection } from "./connection.js";
+import { usageSchema } from "./wire.js";
+
+const inputSchema = z.object({ account: z.string() }).strict();
+type Observation = z.infer;
+export class Usage {
+ private readonly launches = new Map();
+ private readonly sessions = new Map<
+ string,
+ { account: string; read: () => Promise }
+ >();
+ remember(launch: ProviderLaunch): { account: string } {
+ // MSP 1.4.1 has no stable account ID; swapping accounts in one config directory shares a report ID.
+ const configHome =
+ launch.env.XDG_CONFIG_HOME ?? path.join(launch.env.HOME ?? homedir(), ".config");
+ const key = hashAccountKey(path.resolve(configHome, "muse"));
+ this.launches.set(key, launch);
+ return { account: key };
+ }
+ attach(id: string, launch: ProviderLaunch, read: () => Promise): void {
+ this.sessions.set(id, { ...this.remember(launch), read });
+ }
+ detach(id: string): void {
+ this.sessions.delete(id);
+ }
+ private async read(account: string, launch: ProviderLaunch): Promise {
+ const readers = [...this.sessions.values()].filter((session) => session.account === account);
+ if (readers.length > 0) {
+ const observations = await Promise.all(readers.map((session) => session.read()));
+ const usages = observations.flatMap((observation) =>
+ observation.usage ? [observation.usage] : [],
+ );
+ usages.sort((a, b) => b.observedAtMs - a.observedAtMs);
+ return usages.length > 0 ? { usage: usages[0] } : {};
+ }
+ const host = new MspConnection({ launch });
+ try {
+ await host.initialize();
+ return await host.request("usage/read", {}, usageSchema);
+ } finally {
+ await host.close();
+ }
+ }
+ registration(): UsageSourceRegistration {
+ return {
+ id: "muse",
+ label: "Muse Code",
+ icon: "icon.svg",
+ input: inputSchema,
+ discover: async () => [...this.launches.keys()].map((account) => ({ account })),
+ identify: async (input) => {
+ const { account } = inputSchema.parse(input);
+ return this.launches.has(account) ? { key: account, label: "Muse Code" } : null;
+ },
+ fetch: async (input) => {
+ const { account } = inputSchema.parse(input);
+ const launch = this.launches.get(account);
+ if (!launch) return unavailableUsage();
+ try {
+ const { usage } = await this.read(account, launch);
+ if (!usage) return unavailableUsage();
+ return {
+ status: "available",
+ planLabel: usage.tier,
+ windows: [
+ windowFromUsedPct({
+ id: "five_hour",
+ label: `${usage.window.windowDurationMins / 60} hours`,
+ utilizationPct: usage.window.usedPercent,
+ resetsAt: new Date(usage.window.resetsAtMs).toISOString(),
+ tone: toneFromUsedPct(usage.window.usedPercent),
+ }),
+ windowFromUsedPct({
+ id: "weekly",
+ label: "Weekly",
+ utilizationPct: usage.weekly.usedPercent,
+ resetsAt: new Date(usage.weekly.resetsAtMs).toISOString(),
+ tone: toneFromUsedPct(usage.weekly.usedPercent),
+ }),
+ ],
+ details: [
+ {
+ id: "observed",
+ label: "Observed",
+ value: new Date(usage.observedAtMs).toISOString(),
+ },
+ ],
+ };
+ } catch (error) {
+ return {
+ status: "error",
+ windows: [],
+ error: error instanceof Error ? error.message : String(error),
+ };
+ }
+ },
+ };
+ }
+}
diff --git a/plugins/muse-provider/server/wire.ts b/plugins/muse-provider/server/wire.ts
new file mode 100644
index 0000000000..4955acdaa5
--- /dev/null
+++ b/plugins/muse-provider/server/wire.ts
@@ -0,0 +1,278 @@
+import { z } from "zod";
+
+export const fingerprint =
+ "sha256:e0e163db6ccf00dbe68402ce55d6319b3edc33c421f31e9583b587b2de8a118f";
+export const effortSchema = z.enum([
+ "none",
+ "minimal",
+ "low",
+ "medium",
+ "high",
+ "xhigh",
+ "max",
+ "ultra",
+]);
+export const approvalModeSchema = z.enum([
+ "onRequest",
+ "promptUnmatched",
+ "denyUnmatched",
+ "allowAll",
+]);
+export const itemSchema = z.object({
+ itemId: z.string(),
+ revision: z.number().int(),
+ childSessionId: z.string().optional(),
+ role: z.string().optional(),
+ objective: z.string().optional(),
+ message: z.string().default(""),
+ entryId: z.string().optional(),
+ kind: z.string(),
+ status: z.string(),
+ turnId: z.string().nullable().optional(),
+ commandId: z.string().optional(),
+ recordedAt: z.string().optional(),
+ text: z.string().default(""),
+ displayText: z.string().optional(),
+ summary: z.array(z.string()).default([]),
+ tool: z.string().default(""),
+ args: z.string().default("{}"),
+ callId: z.string().optional(),
+ commandText: z.string().optional(),
+ visibleOutput: z.string().default(""),
+ exitCode: z.number().optional(),
+ fallbackText: z.string().default(""),
+ failureReason: z.string().optional(),
+ patchRef: z.object({ id: z.string() }).optional(),
+ tokensBefore: z.number().optional(),
+});
+export type WireItem = z.infer;
+export const requirementSchema = z.object({
+ approvalId: z.string(),
+ sourceIndex: z.number().optional(),
+});
+export const choiceSchema = z.object({
+ choiceId: z.string(),
+ decision: z.string(),
+ label: z.string(),
+ scope: z.string(),
+});
+export const approvalSchema = z.object({
+ approvalId: z.string(),
+ currentRequirementId: requirementSchema.optional(),
+ availableChoices: z.array(choiceSchema),
+ toolName: z.string().default("Tool"),
+ subject: z.object({
+ kind: z.string(),
+ command: z.string().default(""),
+ path: z.string().default(""),
+ host: z.string().default(""),
+ workspaceRoot: z.string().optional(),
+ stages: z
+ .array(
+ z.object({
+ position: z.number(),
+ totalStages: z.number(),
+ argv: z.array(z.string()),
+ requirementId: requirementSchema,
+ resolution: z.object({ kind: z.string() }),
+ }),
+ )
+ .default([]),
+ }),
+});
+export type WireApproval = z.infer;
+export const notificationSchema = z.object({
+ sessionId: z.string().optional(),
+ viewCursor: z.string().optional(),
+});
+export const frameSchema = z.object({
+ jsonrpc: z.literal("2.0"),
+ id: z.union([z.string(), z.number()]).optional(),
+ method: z.string().optional(),
+ params: z.unknown().optional(),
+ result: z.unknown().optional(),
+ error: z
+ .object({
+ code: z.number(),
+ message: z.string(),
+ data: z
+ .object({ kind: z.string().optional(), reason: z.string().optional() })
+ .passthrough()
+ .optional(),
+ })
+ .optional(),
+});
+export const initializedSchema = z.object({ schema: z.object({ fingerprint: z.string() }) });
+export const accountSchema = z.object({
+ state: z.string(),
+});
+export const catalogSchema = z.object({
+ models: z.array(
+ z.object({
+ modelId: z.string(),
+ providerId: z.string(),
+ displayLabel: z.string(),
+ contextLimit: z.number().nullable(),
+ isDefault: z.boolean(),
+ defaultReasoningEffort: effortSchema.nullable().optional(),
+ reasoningEffortVariants: z.union([z.array(effortSchema), z.literal("unknown")]).default([]),
+ variants: z.array(effortSchema).default([]),
+ }),
+ ),
+});
+export const sessionSchema = z.object({
+ session: z.object({
+ sessionId: z.string(),
+ modelId: z.string(),
+ providerId: z.string(),
+ approvalMode: z.object({ mode: approvalModeSchema }).optional(),
+ }),
+ viewCursor: z.string(),
+ history: z
+ .object({ mode: z.string(), items: z.array(itemSchema).nullable().default([]) })
+ .optional(),
+ pendingRequests: z
+ .array(
+ z.object({ kind: z.string(), approvalId: z.string().optional(), viewCursor: z.string() }),
+ )
+ .default([]),
+});
+export const persistenceSchema = z.object({
+ sessionId: z.string(),
+ cursor: z.string().optional(),
+ model: z.string().optional(),
+ thinkingOption: effortSchema.optional(),
+});
+export const deltaSchema = z.object({ itemId: z.string(), field: z.string(), delta: z.string() });
+export const turnSchema = z.object({
+ turnId: z.string(),
+ commandId: z.string().optional(),
+ terminal: z.string().optional(),
+ error: z.object({ kind: z.string(), message: z.string() }).optional(),
+});
+export const promptResultSchema = z.object({ turnId: z.string(), disposition: z.string() });
+export const outputSchema = z.object({
+ content: z.string(),
+ encoding: z.enum(["utf8", "base64"]),
+ eof: z.boolean(),
+});
+export const patchSchema = z.object({
+ files: z.array(
+ z.object({
+ path: z.string(),
+ hunks: z.array(
+ z.object({
+ oldStart: z.number(),
+ oldLines: z.number(),
+ newStart: z.number(),
+ newLines: z.number(),
+ lines: z.array(z.string()),
+ }),
+ ),
+ }),
+ ),
+});
+export const toolArgsSchema = z.object({
+ objective: z.string().optional(),
+ role: z.string().optional(),
+ command: z.string().default(""),
+ path: z.string().default(""),
+ find: z.string().optional(),
+ replace: z.string().optional(),
+ content: z.string().optional(),
+ query: z.string().default(""),
+ pattern: z.string().default(""),
+ url: z.string().default(""),
+});
+export const tokenUsageSchema = z.object({
+ cumulative: z.object({ promptTokens: z.number(), outputTokens: z.number() }),
+ usage: z.object({ cachedTokens: z.number().optional() }).optional(),
+});
+export const contextUsageSchema = z.object({
+ usedTokens: z.number(),
+ windowTokens: z.number().optional(),
+});
+
+export const ackSchema = z.object({}).passthrough();
+export const skillsSchema = z.object({
+ skills: z.array(
+ z.object({
+ selector: z.string(),
+ description: z.string(),
+ argumentHint: z.string().optional(),
+ }),
+ ),
+});
+export const questionSchema = z.object({
+ userInputId: z.string(),
+ toolName: z.string(),
+ questions: z.array(
+ z.object({
+ id: z.string(),
+ header: z.string(),
+ question: z.string(),
+ options: z.array(z.object({ label: z.string(), description: z.string().default("") })),
+ selection: z.object({
+ mode: z.enum(["single", "multiple"]),
+ minSelections: z.number().optional(),
+ maxSelections: z.number().optional(),
+ }),
+ }),
+ ),
+});
+export const settledQuestionSchema = z.object({ userInputId: z.string() });
+export const questionAnswersSchema = z.object({ answers: z.record(z.string(), z.string()) });
+export const todoSchema = z.object({
+ viewCursor: z.string(),
+ items: z.array(
+ z.object({ text: z.string(), status: z.string(), activeForm: z.string().optional() }),
+ ),
+});
+export const pageSchema = z.object({
+ events: z.array(z.object({ method: z.string(), params: z.record(z.string(), z.unknown()) })),
+ nextCursor: z.string().nullable(),
+});
+export const gapSchema = z.object({ after: z.string(), next: z.string() });
+export const sessionListSchema = z.object({
+ nextCursor: z.string().nullable(),
+ sessions: z.array(
+ z.object({
+ sessionId: z.string(),
+ workspaceRoot: z.string().nullable(),
+ title: z.string().optional(),
+ updatedAt: z.string(),
+ modelId: z.string(),
+ }),
+ ),
+});
+export const usageSchema = z.object({
+ usage: z
+ .object({
+ observedAtMs: z.number(),
+ tier: z.string(),
+ window: z.object({
+ resetsAtMs: z.number(),
+ usedPercent: z.number(),
+ windowDurationMins: z.number(),
+ }),
+ weekly: z.object({ resetsAtMs: z.number(), usedPercent: z.number() }),
+ })
+ .optional(),
+});
+export const childSessionSchema = z.object({
+ session: z.object({
+ sessionId: z.string(),
+ workspaceRoot: z.string().nullable(),
+ title: z.string().optional(),
+ }),
+ viewCursor: z.string(),
+});
+
+export const itemNotificationSchema = z.object({ item: itemSchema });
+
+export const pendingSchema = z.object({
+ approvals: z.array(approvalSchema),
+ userInputs: z.array(questionSchema).default([]),
+});
+
+export const approvalResolvedSchema = z.object({ approvalId: z.string() });
diff --git a/plugins/muse-provider/shared/settings.ts b/plugins/muse-provider/shared/settings.ts
new file mode 100644
index 0000000000..f1af368e8c
--- /dev/null
+++ b/plugins/muse-provider/shared/settings.ts
@@ -0,0 +1,24 @@
+import { z } from "zod";
+import { defineSettings } from "@getpaseo/plugin";
+
+export const settingsSchema = z.object({
+ sandbox: z
+ .boolean()
+ .default(true)
+ .describe("Keep Muse filesystem and network sandboxing enabled"),
+ network: z
+ .enum(["proxy-only", "restricted", "enabled"])
+ .default("proxy-only")
+ .describe("Sandbox network access; disabling sandbox forces full network access"),
+ trustWorkspace: z
+ .boolean()
+ .default(false)
+ .describe("Let Muse load project-scoped skills and config from the workspace"),
+});
+
+export const museSettings = defineSettings({
+ id: "muse",
+ scope: "host",
+ version: 1,
+ schema: settingsSchema,
+});
diff --git a/plugins/muse-provider/test/fake-muse.mjs b/plugins/muse-provider/test/fake-muse.mjs
new file mode 100644
index 0000000000..fffca0cc89
--- /dev/null
+++ b/plugins/muse-provider/test/fake-muse.mjs
@@ -0,0 +1,404 @@
+import { appendFileSync, readFileSync } from "node:fs";
+import { createInterface } from "node:readline";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+const root = path.join(path.dirname(fileURLToPath(import.meta.url)), "fixtures");
+const scenario = process.env.MUSE_TEST_SCENARIO || "text-reasoning";
+if (process.argv.includes("--version")) {
+ process.stdout.write(`Muse Code ${process.env.MUSE_TEST_VERSION || "1.4.1"}\n`);
+ process.exit(0);
+}
+const rows = readFixture(scenario);
+if (process.env.MUSE_TEST_REQUESTS)
+ appendFileSync(
+ process.env.MUSE_TEST_REQUESTS,
+ JSON.stringify({ event: "hostStarted", args: process.argv.slice(2) }) + "\n",
+ );
+const catalogRows = readFixture("catalog-controls");
+const replacements = new Map();
+const counts = new Map();
+const receipts = new Set();
+const lines = createInterface({ input: process.stdin });
+lines.on("line", receive);
+function receive(line) {
+ const frame = JSON.parse(line);
+ if (process.env.MUSE_TEST_REQUESTS)
+ appendFileSync(process.env.MUSE_TEST_REQUESTS, JSON.stringify(frame) + "\n");
+ if (frame.result) {
+ receipts.delete(frame.id);
+ return;
+ }
+ if (controlResponse(frame)) return;
+ if (queuedResponse(frame)) return;
+ const candidates = rows.filter((row) => row.dir === "out" && row.msg.method === frame.method);
+ const count = counts.get(frame.method) || 0;
+ counts.set(frame.method, count + 1);
+ if (retryResponse(frame, count)) return;
+ const request = candidates[count];
+ if (!request)
+ return rpcError(
+ frame,
+ -32601,
+ "unknownMethod",
+ `No fixture request for ${frame.method} #${count}`,
+ );
+ const recorded = request.msg;
+ validateCommand(frame, recorded);
+ const response = rows.find(
+ (row) => row.dir === "in" && row.msg.id === recorded.id && !row.msg.method,
+ );
+ if (!response) throw new Error(`Fixture response absent: ${frame.method}`);
+ const position = rows.indexOf(request);
+ let end = position + 1;
+ while (end < rows.length && !(rows[end].dir === "out" && rows[end].msg.method)) end++;
+ const messages = rows.slice(position + 1, end).filter((row) => row.dir === "in");
+ if (!messages.includes(response)) messages.unshift(response);
+ if (process.env.MUSE_TEST_ACK_LAST && frame.method === "turn/start") {
+ const terminalFirst = messages.filter((row) => row !== response);
+ for (const row of terminalFirst) emitFixtureMessage(row.msg, recorded, frame);
+ setTimeout(() => emitFixtureMessage(response.msg, recorded, frame), 50);
+ } else for (const row of messages) emitFixtureMessage(row.msg, recorded, frame);
+}
+function controlResponse(frame) {
+ if (frame.method === "initialized") return true;
+ if (frame.method === "initialize" && process.env.MUSE_TEST_EXIT) {
+ process.stderr.write("diagnostic tail, not protocol\n");
+ process.exit(Number(process.env.MUSE_TEST_EXIT));
+ }
+ if (process.env.MUSE_TEST_HANG === frame.method) return true;
+ if (frame.method === "session/setReasoningEffort") {
+ respond(frame, { status: "accepted", commandId: frame.params.commandId });
+ return true;
+ }
+ if (frame.method === "account/read") {
+ respond(frame, { credentialRequired: true, state: process.env.MUSE_TEST_ACCOUNT || "envKey" });
+ return true;
+ }
+ if (parityResponse(frame)) return true;
+ if (frame.method === "model/list") {
+ const result = responseFor(catalogRows, "model/list");
+ if (process.env.MUSE_TEST_MODELS) result.models = JSON.parse(process.env.MUSE_TEST_MODELS);
+ respond(frame, result);
+ return true;
+ }
+ if (frame.method === "session/resume" && process.env.MUSE_TEST_GONE) {
+ rpcError(frame, -32020, "sessionNotFound", "missing");
+ return true;
+ }
+ return false;
+}
+function parityResponse(frame) {
+ if (workflowResponse(frame)) return true;
+ if (frame.method === "view/page") {
+ let result;
+ if (process.env.MUSE_TEST_GAP || process.env.MUSE_TEST_SILENT) {
+ result = {
+ events: replace(
+ rows
+ .filter(
+ (row) =>
+ row.dir === "in" &&
+ row.msg.method &&
+ row.msg.params?.viewCursor &&
+ !row.msg.id &&
+ row.msg.method !== "item/delta",
+ )
+ .map((row) => ({ method: row.msg.method, params: row.msg.params })),
+ ),
+ nextCursor: null,
+ };
+ } else {
+ result = replace(
+ responseFor(
+ readFixture(
+ frame.params.sessionId === "fixture-child" ? "phase3-child-read" : "phase3-controls",
+ ),
+ "view/page",
+ ),
+ );
+ for (const event of result.events) event.params.sessionId = frame.params.sessionId;
+ }
+ respond(frame, result);
+ return true;
+ }
+ if (frame.method === "session/read") {
+ const result = responseFor(readFixture("phase3-child-read"), "session/read");
+ result.session.sessionId = frame.params.sessionId;
+ respond(frame, result);
+ return true;
+ }
+ if (frame.method === "usage/read") {
+ const result = process.env.MUSE_TEST_USAGE
+ ? JSON.parse(process.env.MUSE_TEST_USAGE)
+ : responseFor(catalogRows, "usage/read");
+ respond(frame, result);
+ return true;
+ }
+ if (frame.method === "session/list") {
+ const result = responseFor(catalogRows, "session/list");
+ result.nextCursor = null;
+ respond(frame, result);
+ return true;
+ }
+ if (frame.method === "userInput/cancel" && scenario !== "phase3-cancel") {
+ respond(frame, {
+ status: "accepted",
+ commandId: frame.params.commandId,
+ userInputId: frame.params.userInputId,
+ });
+ send({
+ jsonrpc: "2.0",
+ method: "userInput/settled",
+ params: {
+ sessionId: frame.params.sessionId,
+ userInputId: frame.params.userInputId,
+ outcome: "cancelled",
+ },
+ });
+ return true;
+ }
+ if (frame.method === "session/compact" && process.env.MUSE_TEST_COMPACT) {
+ respond(frame, { status: "accepted", commandId: frame.params.commandId });
+ for (const [revision, status] of [
+ [1, "inProgress"],
+ [2, "completed"],
+ ])
+ send({
+ jsonrpc: "2.0",
+ method: revision === 1 ? "item/started" : "item/completed",
+ params: {
+ sessionId: frame.params.sessionId,
+ item: { itemId: "fixture-compaction", revision, kind: "compaction", status },
+ },
+ });
+ return true;
+ }
+ if (skillResponse(frame)) return true;
+ return false;
+}
+function skillResponse(frame) {
+ if (frame.method === "skill/list") {
+ const skillRows =
+ scenario.startsWith("phase3-") && rows.some((row) => row.msg.method === "skill/list")
+ ? rows
+ : readFixture("skill");
+ const result = responseFor(skillRows, "skill/list");
+ if (process.env.MUSE_TEST_SKILLS_CHANGED && counts.has("skill-read")) result.skills = [];
+ counts.set("skill-read", 1);
+ respond(frame, result);
+ return true;
+ }
+ return false;
+}
+
+function workflowResponse(frame) {
+ if (frame.method === "view/page" && process.env.MUSE_TEST_WORKFLOW) {
+ const result = responseFor(readFixture("phase3-default-workflow"), "view/page");
+ result.events = result.events.filter(
+ (event) => event.params.item?.kind === "workflow" || event.params.item?.tool === "workflow",
+ );
+ for (const event of result.events) event.params.sessionId = frame.params.sessionId;
+ respond(frame, result);
+ return true;
+ }
+ return false;
+}
+
+function queuedResponse(frame) {
+ if (
+ process.env.MUSE_TEST_QUEUE &&
+ frame.method === "turn/start" &&
+ counts.get(frame.method) === 1
+ ) {
+ respond(frame, {
+ turnId: frame.params.commandId,
+ disposition: "queued",
+ startedNewTurn: false,
+ });
+ return true;
+ }
+ return false;
+}
+function retryResponse(frame, count) {
+ if (process.env.MUSE_TEST_RETRY === frame.method && count === 0) {
+ counts.set(frame.method, 0);
+ delete process.env.MUSE_TEST_RETRY;
+ replacements.set("retryCommandId", frame.params.commandId);
+ rpcError(frame, -32001, process.env.MUSE_TEST_RETRY_KIND || "overloaded", "busy");
+ return true;
+ }
+ if (
+ replacements.has("retryCommandId") &&
+ replacements.get("retryCommandId") !== frame.params.commandId
+ )
+ throw new Error("Retry changed commandId");
+ replacements.delete("retryCommandId");
+ return false;
+}
+function validateCommand(frame, recorded) {
+ if (recorded.params.commandId) {
+ if (
+ !/^[0-9a-f]{8}-[0-9a-f]{4}-7[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/.test(
+ frame.params.commandId,
+ )
+ )
+ throw new Error("Not UUIDv7");
+ replacements.set(recorded.params.commandId, frame.params.commandId);
+ }
+ if (
+ frame.method === "approval/decide" &&
+ recorded.params.requirementId.sourceIndex !== frame.params.requirementId.sourceIndex
+ )
+ throw new Error("Wrong approval stage");
+}
+function emitFixtureMessage(recordedMessage, recorded, frame) {
+ const message = replace(recordedMessage);
+ if (!message.method && message.id === recorded.id) message.id = frame.id;
+ if (
+ message.method === "session/closed" ||
+ (message.method === "session/statusChanged" && message.params.status === "notLoaded")
+ )
+ return;
+ if (frame.method === "session/start" && message.result?.session?.approvalMode)
+ message.result.session.approvalMode.mode = frame.params.approvalMode;
+ if (message.result?.viewCursor && process.env.MUSE_TEST_EMPTY_CURSOR)
+ message.result.viewCursor = "";
+ applyTestVariants(message);
+ if (parityDelivery(message)) return;
+ if (message.method && message.id !== undefined) receipts.add(message.id);
+ send(message);
+ if (
+ process.env.MUSE_TEST_STALE &&
+ message.method === "item/completed" &&
+ message.params.item.kind === "agentMessage"
+ ) {
+ send({
+ ...message,
+ params: {
+ ...message.params,
+ item: { ...message.params.item, revision: 1, text: "STALE_REVISION" },
+ },
+ });
+ }
+}
+function parityDelivery(message) {
+ if (process.env.MUSE_TEST_WORKFLOW && message.method === "turn/completed")
+ send({
+ jsonrpc: "2.0",
+ method: "view/gap",
+ params: { sessionId: message.params.sessionId, after: "", next: message.params.viewCursor },
+ });
+ if (
+ process.env.MUSE_TEST_SILENT &&
+ ["item/started", "item/delta", "item/completed", "turn/completed"].includes(message.method) &&
+ message.params.item?.kind !== "userMessage"
+ )
+ return true;
+ if (
+ process.env.MUSE_TEST_GAP &&
+ message.method === "item/completed" &&
+ message.params.item.kind === "agentMessage"
+ ) {
+ send({
+ jsonrpc: "2.0",
+ method: "view/gap",
+ params: {
+ sessionId: message.params.sessionId,
+ after: "fixture-last-cursor",
+ next: message.params.viewCursor,
+ },
+ });
+ return true;
+ }
+ if (process.env.MUSE_TEST_SKILLS_CHANGED && message.method === "turn/completed")
+ send({
+ jsonrpc: "2.0",
+ method: "skill/changed",
+ params: { sessionId: message.params.sessionId },
+ });
+ return false;
+}
+function applyTestVariants(message) {
+ applyParityVariants(message);
+ if (message.method === "turn/completed" && process.env.MUSE_TEST_INTERRUPT_TERMINAL)
+ message.params.terminal = process.env.MUSE_TEST_INTERRUPT_TERMINAL;
+ if (message.params?.availableChoices && process.env.MUSE_TEST_CHOICES)
+ message.params.availableChoices = message.params.availableChoices.toReversed();
+ if (message.method === "turn/completed" && process.env.MUSE_TEST_AUTH_REQUIRED) {
+ message.params.terminal = "failed";
+ message.params.error = { kind: "authRequired", message: "authentication expired" };
+ }
+ if (message.result?.schema && process.env.MUSE_TEST_FINGERPRINT)
+ message.result.schema.fingerprint = process.env.MUSE_TEST_FINGERPRINT;
+ if (message.params?.item?.tool === "read_file" && process.env.MUSE_TEST_TOOL) {
+ message.params.item.tool = process.env.MUSE_TEST_TOOL;
+ message.params.item.args = JSON.stringify({
+ path: "f",
+ query: "needle",
+ url: "https://example.com",
+ });
+ }
+ if (message.params?.item?.tool === "read_file" && process.env.MUSE_TEST_UNKNOWN_KIND) {
+ message.params.item.kind = "futureItem";
+ message.params.item.fallbackText = "New MSP item";
+ }
+}
+function applyParityVariants(message) {
+ if (process.env.MUSE_TEST_CHILD && message.params?.item?.tool === "subagent_spawn") {
+ message.params.item.childSessionId = "fixture-child";
+ if (process.env.MUSE_TEST_CHILD === "workflow") message.params.item.kind = "workflow";
+ if (process.env.MUSE_TEST_CHILD === "dedicated") {
+ message.params.item.kind = "subagent";
+ message.params.item.role = "worker";
+ message.params.item.objective = "Child objective";
+ }
+ }
+ if (message.params?.availableChoices && process.env.MUSE_TEST_DENIED)
+ message.params.availableChoices.push({
+ choiceId: "reject_once",
+ decision: "denied",
+ scope: "once",
+ label: "Reject tool",
+ });
+}
+lines.on("close", () => {
+ if (process.env.MUSE_TEST_REQUESTS)
+ appendFileSync(process.env.MUSE_TEST_REQUESTS, JSON.stringify({ event: "hostClosed" }) + "\n");
+ if (receipts.size) throw new Error("Missing presentation receipt");
+});
+function readFixture(name) {
+ const transcript = readFileSync(path.join(root, name + ".ndjson"), "utf8")
+ .trim()
+ .split("\n")
+ .map((line) => JSON.parse(line));
+ // The duplicate-decision probe is a separate negative action, not part of the approval flow.
+ const duplicateIds = new Set(
+ transcript
+ .filter((row) => row.msg.error?.data?.kind === "approvalAlreadyResolved")
+ .map((row) => row.msg.id),
+ );
+ return transcript.filter((row) => !duplicateIds.has(row.msg.id));
+}
+function responseFor(transcript, method) {
+ const request = transcript.find((row) => row.dir === "out" && row.msg.method === method);
+ return transcript.find(
+ (row) => row.dir === "in" && row.msg.id === request.msg.id && !row.msg.method,
+ ).msg.result;
+}
+function replace(value) {
+ if (typeof value === "string") return replacements.get(value) || value;
+ if (Array.isArray(value)) return value.map(replace);
+ if (value && typeof value === "object")
+ return Object.fromEntries(Object.entries(value).map(([key, entry]) => [key, replace(entry)]));
+ return value;
+}
+function send(frame) {
+ process.stdout.write(JSON.stringify(frame) + "\n");
+}
+function respond(frame, result) {
+ send({ jsonrpc: "2.0", id: frame.id, result });
+}
+function rpcError(frame, code, kind, message) {
+ send({ jsonrpc: "2.0", id: frame.id, error: { code, message, data: { kind } } });
+}
diff --git a/plugins/muse-provider/test/fixtures/README.md b/plugins/muse-provider/test/fixtures/README.md
new file mode 100644
index 0000000000..b294bf4a0b
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/README.md
@@ -0,0 +1,78 @@
+# Muse MSP fixtures
+
+Captured on Linux on 2026-09-29 from Muse Code **1.4.1 (1.4.1-R4503.1)**,
+build `35815c253477406321e3f5595195becc25e3907a`.
+
+- Stable handshake fingerprint: `sha256:e0e163db6ccf00dbe68402ce55d6319b3edc33c421f31e9583b587b2de8a118f`.
+- Experimental export fingerprint: `sha256:b359d70b581b0ea471d35a7770d3039fdd35f19a46a2d42b43fd4b1674d52c8a`.
+- Schema version: `1`. Both `sessionMcp` and `sessionListStream` were granted.
+
+Each line is `{ "dir": "out" | "in", "msg": }`.
+`out` means client to host; `in` means host to client. IDs, timestamps, cursors,
+revisions, deltas, and event order are retained. Replay consumers should treat IDs
+and cursors as opaque and compare behavior rather than wall-clock values.
+The skill catalogs retain only the test selectors `phase0` and `muse-parity-*`; unrelated personal,
+bundled, and installed-plugin skill rows were removed. No credentials are included.
+
+A throwaway driver launched `muse serve` with isolated `XDG_CONFIG_HOME` and
+`XDG_DATA_HOME`. Model turns used a custom Responses endpoint, an environment key,
+`providerId: "meta"`, and `modelId: "meta/muse-spark-1.3"`. The settings pinned the
+endpoint's `auth: "bearer"`, the default provider/model, and permission profile
+`:ask-me` with its own `schema_version: 1`. The sandbox and default `proxy-only`
+network policy remained enabled. Workspace trust was enabled for project skills.
+The approval judge was disabled for staged approval probes so decisions reached
+the client. The driver and local server remain outside the repository.
+
+| File | Recorded behavior |
+| -------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| `text-reasoning.ndjson` | Session start, rational-sum prompt, public reasoning summary, streamed assistant text, token usage, terminal. |
+| `tools-edit.ndjson` | Read `f`, run `wc -l f`, replace `beta` with `gamma`; fetch the JSON patch through `patchRef` and `item/readOutput`. |
+| `staged-approval.ndjson` | `wc -l f && rm -rf f`: safe first stage, held second stage, receipt and decision, terminal resolution. Also records a duplicate decision rejected as already resolved. |
+| `multi-stage-approval.ndjson` | `wc -l f && rm -rf f && rm -rf g`: successive decisions return `terminal: false`, then `true`; both files are removed. |
+| `interrupt.ndjson` | Interrupt a running shell sleep; tool reconciliation and `turn/completed` with `terminal: "cancelled"`. |
+| `steer.ndjson` | Submit `ifBusy: "steer"` during a shell sleep; accepted as `steered`, and the original turn replies with the replacement marker. |
+| `resume-source.ndjson` | Complete a marker turn, then kill the host process before starting either resume probe. |
+| `resume-without-cursor.ndjson` | New host returns inline history and runs a fresh turn recalling the marker. |
+| `resume-with-cursor.ndjson` | New host returns `history.mode: "none"`, replays the cursor suffix, then completes a fresh marker turn. |
+| `resume-reasoning.ndjson` | New host resumes the steering session, including its reasoning history, and completes another text turn. |
+| `subagent.ndjson` | Native spawn/wait/read-result tool calls return a child result marker and an evidence log path. This build emits `toolCall`, without a dedicated `subagent` item. |
+| `skill.ndjson` | Discover the project skill and invoke its selector through a structured skill input part. |
+| `image-followup.ndjson` | Send a valid 16×16 PNG, then complete a text-only marker turn in the same session. Image-description accuracy is not asserted. |
+| `catalog-controls.ndjson` | Model catalog, environment-key account state, empty subscription usage, paginated sessions, approval mode change, valid model selection, and rejection of a model outside the catalog. |
+| `mcp-stdio.ndjson` | Admit a session-scoped stdio server. Model attempts fail with an unknown-tool routing error and no marker is returned; this is a failure fixture. |
+| `auto-review-unavailable.ndjson` | Selecting `:auto-review` as the default profile rejects session start because the automated reviewer is unavailable. |
+| `unsafe-path.ndjson` | Group-writable data directory rejects session start with `UnsafePath`. |
+| `initialize-history.ndjson` | Handshake against 322 retained session logs (7,713,541 bytes); three measured launches took 155–160 ms. |
+
+The project skill body was “Reply with exactly SKILL_PHASE0_OK. Do not use tools.”
+The injected stdio server implemented `initialize`, `tools/list`, and `tools/call`,
+advertised `verification_echo` with an empty-object input schema, and returned
+`MCP_PHASE0_OK` as text. The host registered `mcp__verification__verification_echo`,
+but the model route attempted the unqualified `verification_echo`; the marker
+was never delivered. Keep this distinction when testing MCP support.
+
+Phase 3 captures use the same build and isolated custom route. Sandbox and network
+remain at their defaults. `phase3-user-skill` omits workspace trust;
+`phase3-project-skill` enables it. Native subagent captures enable
+`MUSE_EXPERIMENTAL_SDK_ENABLED=on`; the default workflow capture reads the session
+from a daemon run that omitted the flag. Its workflow child IDs are internal
+activity IDs, not MSP `childSessionId` values.
+
+| File | Recorded behavior |
+| -------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------ |
+| `phase3-controls.ndjson` | Two todo entries, a single-choice question, an answer and matching settlement, retained view paging, empty subscription usage. |
+| `phase3-cancel.ndjson` | Question cancellation and matching cancelled settlement. |
+| `phase3-child-read.ndjson` | Read and page an actual native child session, returning its assistant marker. |
+| `phase3-default-workflow.ndjson` | Read and page the default daemon run: workflow revisions 1–7, child activity, and `MUSE_PARITY_CHILD_OK`; no `childSessionId`. |
+| `phase3-user-skill.ndjson` | User-scoped skill catalog and structured invocation, returning `MUSE_PARITY_USER_OK` with trust off. |
+| `phase3-project-skill.ndjson` | Project-scoped skill catalog and invocation, returning `MUSE_PARITY_PROJECT_OK` with trust on. |
+| `phase3-compact.ndjson` | Resume a completed session; manual compaction rejects with `compaction_unavailable`. |
+| `phase3-compact-history.ndjson` | Resume three completed turns; catalog context limit is null and compaction still rejects. |
+| `phase3-compact-limit.ndjson` | Same session and route with only a configured context limit; compaction is admitted and completes, reducing 22,192 tokens to 21,322. |
+
+The subprocess fixture host also generates schema-based variants for dedicated
+subagent items, explicit child-session linkage, nonempty subscription windows,
+`skill/changed`, deny choices, lost events, watchdog silence, and late admission.
+These variants test protocol behavior; they are not claimed as real-host captures.
+The workflow replay triggers a generated gap to page the recorded default run.
+Disk edits in a live host did not emit `skill/changed` during a 15-second probe.
diff --git a/plugins/muse-provider/test/fixtures/auto-review-unavailable.ndjson b/plugins/muse-provider/test/fixtures/auto-review-unavailable.ndjson
new file mode 100644
index 0000000000..3d6f6a8e83
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/auto-review-unavailable.ndjson
@@ -0,0 +1,5 @@
+{"dir":"out","msg":{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"clientInfo":{"name":"paseo_phase0","version":"0.0.0"},"capabilities":{"experimentalApi":true,"requestedCapabilities":["sessionMcp","sessionListStream"]}}}}
+{"dir":"in","msg":{"id":1,"jsonrpc":"2.0","result":{"experimentalApi":true,"grantedCapabilities":["sessionMcp","sessionListStream"],"museHome":"/tmp/muse-phase0/data/muse","platformFamily":"unix","platformOs":"linux","schema":{"fingerprint":"sha256:e0e163db6ccf00dbe68402ce55d6319b3edc33c421f31e9583b587b2de8a118f","version":1},"serverInfo":{"name":"muse","version":"1.4.1"},"sessionDurability":"durable","userAgent":"muse-build/1.4.1 (non-interactive; linux-x86_64; build 35815c253477406321e3f5595195becc25e3907a)"}}}
+{"dir":"out","msg":{"jsonrpc":"2.0","method":"initialized","params":{}}}
+{"dir":"out","msg":{"jsonrpc":"2.0","id":2,"method":"session/start","params":{"commandId":"01a0ee48-a7c2-73c7-aab0-d5550547b265","workspaceRoot":"/tmp/muse-phase0/repo","modelId":"meta/muse-spark-1.3","providerId":"meta","approvalMode":"onRequest"}}}
+{"dir":"in","msg":{"error":{"code":-32603,"data":{"kind":"internal"},"message":"internal error: compose session permission profile: permission profile ':auto-review' cannot be used: the automated reviewer is unavailable on this host"},"id":2,"jsonrpc":"2.0"}}
diff --git a/plugins/muse-provider/test/fixtures/catalog-controls.ndjson b/plugins/muse-provider/test/fixtures/catalog-controls.ndjson
new file mode 100644
index 0000000000..da27f307fd
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/catalog-controls.ndjson
@@ -0,0 +1,26 @@
+{"dir":"out","msg":{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"clientInfo":{"name":"paseo_phase0","version":"0.0.0"},"capabilities":{"experimentalApi":true,"requestedCapabilities":["sessionMcp","sessionListStream"]}}}}
+{"dir":"in","msg":{"id":1,"jsonrpc":"2.0","result":{"experimentalApi":true,"grantedCapabilities":["sessionMcp","sessionListStream"],"museHome":"/tmp/muse-phase0/data/muse","platformFamily":"unix","platformOs":"linux","schema":{"fingerprint":"sha256:e0e163db6ccf00dbe68402ce55d6319b3edc33c421f31e9583b587b2de8a118f","version":1},"serverInfo":{"name":"muse","version":"1.4.1"},"sessionDurability":"durable","userAgent":"muse-build/1.4.1 (non-interactive; linux-x86_64; build 35815c253477406321e3f5595195becc25e3907a)"}}}
+{"dir":"out","msg":{"jsonrpc":"2.0","method":"initialized","params":{}}}
+{"dir":"out","msg":{"jsonrpc":"2.0","id":2,"method":"session/start","params":{"commandId":"01a0ee4b-835a-7889-ae06-b9fa4195949d","workspaceRoot":"/tmp/muse-phase0/repo","modelId":"meta/muse-spark-1.3","providerId":"meta","approvalMode":"onRequest"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704321462,"jsonrpc":"2.0","method":"session/started","params":{"session":{"activeTurnId":null,"approvalMode":{"lastCommandId":null,"mode":"onRequest","source":"startup"},"createdAt":"2026-09-29T17:52:01.38362Z","forkedFrom":null,"modelId":"meta/muse-spark-1.3","path":"/tmp/muse-phase0/data/muse/sessions/2026/09/29/01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6/session.jsonl","providerId":"meta","sessionId":"01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6","status":"idle","turnCount":0,"updatedAt":"2026-09-29T17:52:01.383624Z","workspaceRoot":"/tmp/muse-phase0/repo"}}}}
+{"dir":"in","msg":{"id":2,"jsonrpc":"2.0","result":{"session":{"activeTurnId":null,"approvalMode":{"lastCommandId":null,"mode":"onRequest","source":"startup"},"createdAt":"2026-09-29T17:52:01.38362Z","forkedFrom":null,"modelId":"meta/muse-spark-1.3","path":"/tmp/muse-phase0/data/muse/sessions/2026/09/29/01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6/session.jsonl","providerId":"meta","sessionId":"01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6","status":"idle","turnCount":0,"updatedAt":"2026-09-29T17:52:01.383624Z","workspaceRoot":"/tmp/muse-phase0/repo"},"viewCursor":"v:01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6:1"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704321467,"jsonrpc":"2.0","method":"session/approvalModeChanged","params":{"clientName":"paseo_phase0","commandId":"01a0ee4b-835a-7889-ae06-b9fa4195949d","mode":"onRequest","sessionId":"01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6","source":"approvalReconfigure","sourceRange":{"first":{"id":"61222bfc-8a69-487e-b930-ca6fa2befef2","sequence":5},"last":{"id":"61222bfc-8a69-487e-b930-ca6fa2befef2","sequence":5},"stream":{"id":"01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6","kind":"session"}},"viewCursor":"v:01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6:1"}}}
+{"dir":"out","msg":{"jsonrpc":"2.0","id":3,"method":"model/list","params":{"sessionId":"01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6"}}}
+{"dir":"in","msg":{"id":3,"jsonrpc":"2.0","result":{"models":[{"contextLimit":null,"cost":null,"defaultReasoningEffort":"high","description":null,"displayLabel":"meta/muse-spark-1.3","isActive":true,"isDefault":false,"modelId":"meta/muse-spark-1.3","outputLimit":null,"profileId":null,"providerId":"meta","reasoningEffortVariants":[],"releaseDate":null,"variants":["minimal","low","medium","high","xhigh"]}],"profileId":"tbh","providerId":"meta","source":"bundledCatalog"}}}
+{"dir":"out","msg":{"jsonrpc":"2.0","id":4,"method":"account/read","params":{}}}
+{"dir":"in","msg":{"id":4,"jsonrpc":"2.0","result":{"credentialRequired":true,"label":"META_API_KEY","state":"envKey"}}}
+{"dir":"out","msg":{"jsonrpc":"2.0","id":5,"method":"usage/read","params":{}}}
+{"dir":"in","msg":{"id":5,"jsonrpc":"2.0","result":{}}}
+{"dir":"out","msg":{"jsonrpc":"2.0","id":6,"method":"session/list","params":{"workspaceRoot":"/tmp/muse-phase0/repo","limit":2}}}
+{"dir":"in","msg":{"id":6,"jsonrpc":"2.0","result":{"nextCursor":"p:k:1790704314916673:01a0ee49-ff75-70e2-83fc-3169de40b80c:f509d55a","sessions":[{"activeTurnId":null,"createdAt":"2026-09-29T17:52:01.38362Z","forkedFrom":null,"modelId":"meta/muse-spark-1.3","path":"/tmp/muse-phase0/data/muse/sessions/2026/09/29/01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6/session.jsonl","providerId":"meta","sessionId":"01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6","status":"idle","turnCount":0,"updatedAt":"2026-09-29T17:52:01.460992Z","workspaceRoot":"/tmp/muse-phase0/repo"},{"activeTurnId":null,"branch":"main","createdAt":"2026-09-29T17:50:22.069281Z","firstUserPrompt":"Call the tool mcp__verification__verification_echo with empty arguments {}, then reply with the marker it returns. This is a tool invocation test, do not use skills, shell, or subagents.","forkedFrom":null,"modelId":"meta/muse-spark-1.3","path":"/tmp/muse-phase0/data/muse/sessions/2026/09/29/01a0ee49-ff75-70e2-83fc-3169de40b80c/session.jsonl","providerId":"meta","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","status":"notLoaded","title":"Call the tool mcp__verification__verification_echo with empty arguments {}, then reply with the marker it returns. This is a tool invocation test, do not use skills, shell, or subagents.","turnCount":1,"updatedAt":"2026-09-29T17:51:54.916673Z","workspaceRoot":"/tmp/muse-phase0/repo"}]}}}
+{"dir":"out","msg":{"jsonrpc":"2.0","id":7,"method":"session/setApprovalMode","params":{"commandId":"01a0ee4b-83bc-79d0-a6ac-ea983740fbf0","sessionId":"01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6","mode":"promptUnmatched"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704321487,"jsonrpc":"2.0","method":"session/approvalModeChanged","params":{"clientName":"paseo_phase0","commandId":"01a0ee4b-83bc-79d0-a6ac-ea983740fbf0","mode":"promptUnmatched","sessionId":"01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6","source":"approvalReconfigure","sourceRange":{"first":{"id":"60934282-4249-4369-a638-a18b304d1969","sequence":11},"last":{"id":"60934282-4249-4369-a638-a18b304d1969","sequence":11},"stream":{"id":"01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6","kind":"session"}},"viewCursor":"v:01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6:2"}}}
+{"dir":"in","msg":{"id":7,"jsonrpc":"2.0","result":{"applyOutcome":"completed","commandId":"01a0ee4b-83bc-79d0-a6ac-ea983740fbf0","effectiveMode":{"lastCommandId":"01a0ee4b-83bc-79d0-a6ac-ea983740fbf0","mode":"promptUnmatched","source":"approvalReconfigure"},"status":"accepted"}}}
+{"dir":"out","msg":{"jsonrpc":"2.0","id":8,"method":"session/setModel","params":{"commandId":"01a0ee4b-83bc-7705-a57e-c9666c4b4a38","sessionId":"01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6","model":{"providerId":"meta","modelId":"meta/muse-spark-1.3"}}}}
+{"dir":"in","msg":{"emittedAtMs":1790704321491,"jsonrpc":"2.0","method":"session/listChanged","params":{"session":{"activeTurnId":null,"createdAt":"2026-09-29T17:52:01.38362Z","forkedFrom":null,"modelId":"meta/muse-spark-1.3","path":"/tmp/muse-phase0/data/muse/sessions/2026/09/29/01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6/session.jsonl","providerId":"meta","sessionId":"01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6","status":"idle","turnCount":0,"updatedAt":"2026-09-29T17:52:01.488381Z","workspaceRoot":"/tmp/muse-phase0/repo"}}}}
+{"dir":"in","msg":{"id":8,"jsonrpc":"2.0","result":{"commandId":"01a0ee4b-83bc-7705-a57e-c9666c4b4a38","status":"accepted"}}}
+{"dir":"out","msg":{"jsonrpc":"2.0","id":9,"method":"session/setModel","params":{"commandId":"01a0ee4b-83bc-7795-aaca-393dc487425c","sessionId":"01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6","model":{"providerId":"meta","modelId":"meta/muse-spark-1.2"}}}}
+{"dir":"in","msg":{"error":{"code":-32030,"data":{"commandId":"01a0ee4b-83bc-7795-aaca-393dc487425c","kind":"commandRejected","reason":"invalid_model","retryable":false},"message":"session/setModel command 01a0ee4b-83bc-7795-aaca-393dc487425c rejected: invalid_model: model is not in the catalog"},"id":9,"jsonrpc":"2.0"}}
+{"dir":"in","msg":{"emittedAtMs":1790704321500,"jsonrpc":"2.0","method":"session/closed","params":{"reason":"hostShutdown","sessionId":"01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6","viewCursor":"v:01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6:2"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704321500,"jsonrpc":"2.0","method":"session/statusChanged","params":{"sessionId":"01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6","status":"notLoaded","viewCursor":"v:01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6:2"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704321500,"jsonrpc":"2.0","method":"session/listChanged","params":{"session":{"activeTurnId":null,"createdAt":"2026-09-29T17:52:01.38362Z","forkedFrom":null,"modelId":"meta/muse-spark-1.3","path":"/tmp/muse-phase0/data/muse/sessions/2026/09/29/01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6/session.jsonl","providerId":"meta","sessionId":"01a0ee4b-8364-7aa1-9ba3-c251d4cf0cb6","status":"notLoaded","turnCount":0,"updatedAt":"2026-09-29T17:52:01.491211Z","workspaceRoot":"/tmp/muse-phase0/repo"}}}}
diff --git a/plugins/muse-provider/test/fixtures/image-followup.ndjson b/plugins/muse-provider/test/fixtures/image-followup.ndjson
new file mode 100644
index 0000000000..653b9fbfed
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/image-followup.ndjson
@@ -0,0 +1,51 @@
+{"dir":"out","msg":{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"clientInfo":{"name":"paseo_phase0","version":"0.0.0"},"capabilities":{"experimentalApi":true,"requestedCapabilities":["sessionMcp","sessionListStream"]}}}}
+{"dir":"in","msg":{"id":1,"jsonrpc":"2.0","result":{"experimentalApi":true,"grantedCapabilities":["sessionMcp","sessionListStream"],"museHome":"/tmp/muse-phase0/data/muse","platformFamily":"unix","platformOs":"linux","schema":{"fingerprint":"sha256:e0e163db6ccf00dbe68402ce55d6319b3edc33c421f31e9583b587b2de8a118f","version":1},"serverInfo":{"name":"muse","version":"1.4.1"},"sessionDurability":"durable","userAgent":"muse-build/1.4.1 (non-interactive; linux-x86_64; build 35815c253477406321e3f5595195becc25e3907a)"}}}
+{"dir":"out","msg":{"jsonrpc":"2.0","method":"initialized","params":{}}}
+{"dir":"out","msg":{"jsonrpc":"2.0","id":2,"method":"session/start","params":{"commandId":"01a0ee48-14b3-790c-ab3a-39c72c612044","workspaceRoot":"/tmp/muse-phase0/repo","modelId":"meta/muse-spark-1.3","providerId":"meta","approvalMode":"onRequest"}}}
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diff --git a/plugins/muse-provider/test/fixtures/initialize-history.ndjson b/plugins/muse-provider/test/fixtures/initialize-history.ndjson
new file mode 100644
index 0000000000..9fe32e2cc6
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/initialize-history.ndjson
@@ -0,0 +1,3 @@
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diff --git a/plugins/muse-provider/test/fixtures/interrupt.ndjson b/plugins/muse-provider/test/fixtures/interrupt.ndjson
new file mode 100644
index 0000000000..591f0148ab
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/interrupt.ndjson
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diff --git a/plugins/muse-provider/test/fixtures/mcp-stdio.ndjson b/plugins/muse-provider/test/fixtures/mcp-stdio.ndjson
new file mode 100644
index 0000000000..e23f22335e
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/mcp-stdio.ndjson
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+{"dir":"in","msg":{"emittedAtMs":1790704313774,"jsonrpc":"2.0","method":"item/delta","params":{"delta":"I attempted to call `mcp__verification__verification_echo`","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.3"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704313774,"jsonrpc":"2.0","method":"item/delta","params":{"delta":" with empty arguments","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.4"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704313774,"jsonrpc":"2.0","method":"item/delta","params":{"delta":" `{","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.5"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314078,"jsonrpc":"2.0","method":"item/delta","params":{"delta":"}` multiple times, but each attempt","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.6"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314078,"jsonrpc":"2.0","method":"item/delta","params":{"delta":" was routed to the","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.7"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314079,"jsonrpc":"2.0","method":"item/delta","params":{"delta":" wrong tool identifier","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.8"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314079,"jsonrpc":"2.0","method":"item/delta","params":{"delta":" (`muse.verification_echo`","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.9"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314079,"jsonrpc":"2.0","method":"item/delta","params":{"delta":" instead of `default.mcp__verification__verification_echo`)","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.10"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314386,"jsonrpc":"2.0","method":"item/delta","params":{"delta":" and returned `","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.11"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314386,"jsonrpc":"2.0","method":"item/delta","params":{"delta":"tool unavailable: unknown tool`.","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.12"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314386,"jsonrpc":"2.0","method":"item/delta","params":{"delta":" I","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.13"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314386,"jsonrpc":"2.0","method":"item/delta","params":{"delta":" was","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.14"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314397,"jsonrpc":"2.0","method":"item/delta","params":{"delta":" unable to","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.15"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314456,"jsonrpc":"2.0","method":"item/delta","params":{"delta":" correct","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.16"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314515,"jsonrpc":"2.0","method":"item/delta","params":{"delta":" the routing,","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.17"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314577,"jsonrpc":"2.0","method":"item/delta","params":{"delta":" so no marker was ever","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.18"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314642,"jsonrpc":"2.0","method":"item/delta","params":{"delta":" returned.\n\nNo marker to","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.19"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314706,"jsonrpc":"2.0","method":"item/delta","params":{"delta":" report","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.20"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314770,"jsonrpc":"2.0","method":"item/delta","params":{"delta":".","field":"text","itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:42.21"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314867,"jsonrpc":"2.0","method":"item/completed","params":{"item":{"itemId":"ee2ae138-5529-4ff3-b271-6f92065dcf0d","kind":"agentMessage","recordedAt":"2026-09-29T17:51:54.866963Z","revision":2,"status":"completed","text":"I could not retrieve the marker.\n\nI attempted to call `mcp__verification__verification_echo` with empty arguments `{}` multiple times, but each attempt was routed to the wrong tool identifier (`muse.verification_echo` instead of `default.mcp__verification__verification_echo`) and returned `tool unavailable: unknown tool`. I was unable to correct the routing, so no marker was ever returned.\n\nNo marker to report.","turnId":"01a0ee49-ffce-759b-a6f5-0a15a6623fa1"},"sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","sourceRange":{"first":{"id":"add1291a-31e0-4411-98be-80a35374254f","sequence":444},"last":{"id":"add1291a-31e0-4411-98be-80a35374254f","sequence":444},"stream":{"id":"01a0ee49-ff75-70e2-83fc-3169de40b80c","kind":"session"}},"viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:43"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314911,"jsonrpc":"2.0","method":"session/tokenUsage","params":{"cumulative":{"outputTokens":4299,"promptTokens":494183,"totalTokens":498482},"durationMs":3951,"modelId":"meta/muse-spark-1.3","promptTokens":31328,"sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","sourceRange":{"first":{"id":"0423908e-828a-45cf-95f8-0fb29d65f6b6","sequence":447},"last":{"id":"0423908e-828a-45cf-95f8-0fb29d65f6b6","sequence":447},"stream":{"id":"01a0ee49-ff75-70e2-83fc-3169de40b80c","kind":"session"}},"totalTokens":31497,"turnId":"01a0ee49-ffce-759b-a6f5-0a15a6623fa1","usage":{"cacheReadTokens":8305,"cacheWriteTokens":0,"cachedTokens":8305,"inputTokens":31328,"outputTokens":169,"reasoningTokens":73},"viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:44"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314914,"jsonrpc":"2.0","method":"item/completed","params":{"item":{"childSessionId":"6b57a3c2-dcbd-490e-a2ed-56107a04c4ea","failureReason":"main run completed","fallbackText":"Reminder child session","generationId":10,"itemId":"a757ea2c-e547-432b-a470-b71f7c83dcf4","kind":"reminderChild","recordedAt":"2026-09-29T17:51:54.91425Z","reminderAgentId":"skill-reminder","revision":2,"status":"cancelled","taskId":"01a0ee4b-5aaa-7ac1-a9bc-425cfedf8c15","turnId":"01a0ee49-ffce-759b-a6f5-0a15a6623fa1"},"sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","sourceRange":{"first":{"id":"a757ea2c-e547-432b-a470-b71f7c83dcf4","sequence":431},"last":{"id":"1cf76c07-17ff-4fef-9fdd-8324d008a71b","sequence":450},"stream":{"id":"01a0ee49-ff75-70e2-83fc-3169de40b80c","kind":"session"}},"viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:45"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314914,"jsonrpc":"2.0","method":"session/statusChanged","params":{"sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","status":"idle","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:46"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314915,"jsonrpc":"2.0","method":"turn/completed","params":{"durationMs":92752,"sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","sourceRange":{"first":{"id":"5bf0ae8a-ac86-437d-acf4-9e4cae7ca219","sequence":452},"last":{"id":"5bf0ae8a-ac86-437d-acf4-9e4cae7ca219","sequence":452},"stream":{"id":"01a0ee49-ff75-70e2-83fc-3169de40b80c","kind":"session"}},"terminal":"completed","timeToFirstTokenMs":28541,"turnId":"01a0ee49-ffce-759b-a6f5-0a15a6623fa1","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:46"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704314916,"jsonrpc":"2.0","method":"session/listChanged","params":{"session":{"activeTurnId":null,"branch":"main","createdAt":"2026-09-29T17:50:22.069281Z","firstUserPrompt":"Call the tool mcp__verification__verification_echo with empty arguments {}, then reply with the marker it returns. This is a tool invocation test, do not use skills, shell, or subagents.","forkedFrom":null,"modelId":"meta/muse-spark-1.3","path":"/tmp/muse-phase0/data/muse/sessions/2026/09/29/01a0ee49-ff75-70e2-83fc-3169de40b80c/session.jsonl","providerId":"meta","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","status":"idle","title":"Call the tool mcp__verification__verification_echo with empty arguments {}, then reply with the marker it returns. This is a tool invocation test, do not use skills, shell, or subagents.","turnCount":1,"updatedAt":"2026-09-29T17:51:54.914491Z","workspaceRoot":"/tmp/muse-phase0/repo"}}}}
+{"dir":"in","msg":{"emittedAtMs":1790704315172,"jsonrpc":"2.0","method":"session/closed","params":{"reason":"hostShutdown","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:47"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704315172,"jsonrpc":"2.0","method":"session/statusChanged","params":{"sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","status":"notLoaded","viewCursor":"v:01a0ee49-ff75-70e2-83fc-3169de40b80c:47"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704315172,"jsonrpc":"2.0","method":"session/listChanged","params":{"session":{"activeTurnId":null,"branch":"main","createdAt":"2026-09-29T17:50:22.069281Z","firstUserPrompt":"Call the tool mcp__verification__verification_echo with empty arguments {}, then reply with the marker it returns. This is a tool invocation test, do not use skills, shell, or subagents.","forkedFrom":null,"modelId":"meta/muse-spark-1.3","path":"/tmp/muse-phase0/data/muse/sessions/2026/09/29/01a0ee49-ff75-70e2-83fc-3169de40b80c/session.jsonl","providerId":"meta","sessionId":"01a0ee49-ff75-70e2-83fc-3169de40b80c","status":"notLoaded","title":"Call the tool mcp__verification__verification_echo with empty arguments {}, then reply with the marker it returns. This is a tool invocation test, do not use skills, shell, or subagents.","turnCount":1,"updatedAt":"2026-09-29T17:51:54.916673Z","workspaceRoot":"/tmp/muse-phase0/repo"}}}}
diff --git a/plugins/muse-provider/test/fixtures/multi-stage-approval.ndjson b/plugins/muse-provider/test/fixtures/multi-stage-approval.ndjson
new file mode 100644
index 0000000000..ddf84005c6
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/multi-stage-approval.ndjson
@@ -0,0 +1,51 @@
+{"dir":"out","msg":{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"clientInfo":{"name":"paseo_phase0","version":"0.0.0"},"capabilities":{"experimentalApi":true,"requestedCapabilities":["sessionMcp","sessionListStream"]}}}}
+{"dir":"in","msg":{"id":1,"jsonrpc":"2.0","result":{"experimentalApi":true,"grantedCapabilities":["sessionMcp","sessionListStream"],"museHome":"/tmp/muse-phase0/data/muse","platformFamily":"unix","platformOs":"linux","schema":{"fingerprint":"sha256:e0e163db6ccf00dbe68402ce55d6319b3edc33c421f31e9583b587b2de8a118f","version":1},"serverInfo":{"name":"muse","version":"1.4.1"},"sessionDurability":"durable","userAgent":"muse-build/1.4.1 (non-interactive; linux-x86_64; build 35815c253477406321e3f5595195becc25e3907a)"}}}
+{"dir":"out","msg":{"jsonrpc":"2.0","method":"initialized","params":{}}}
+{"dir":"out","msg":{"jsonrpc":"2.0","id":2,"method":"session/start","params":{"commandId":"01a0ee4b-2759-73fd-a871-0d2558d2d5ba","workspaceRoot":"/tmp/muse-phase0/repo","modelId":"meta/muse-spark-1.3","providerId":"meta","approvalMode":"onRequest"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704297906,"jsonrpc":"2.0","method":"session/started","params":{"session":{"activeTurnId":null,"approvalMode":{"lastCommandId":null,"mode":"onRequest","source":"startup"},"createdAt":"2026-09-29T17:51:37.827408Z","forkedFrom":null,"modelId":"meta/muse-spark-1.3","path":"/tmp/muse-phase0/data/muse/sessions/2026/09/29/01a0ee4b-2760-76c3-823d-1923d8fa3eff/session.jsonl","providerId":"meta","sessionId":"01a0ee4b-2760-76c3-823d-1923d8fa3eff","status":"idle","turnCount":0,"updatedAt":"2026-09-29T17:51:37.827412Z","workspaceRoot":"/tmp/muse-phase0/repo"}}}}
+{"dir":"in","msg":{"id":2,"jsonrpc":"2.0","result":{"session":{"activeTurnId":null,"approvalMode":{"lastCommandId":null,"mode":"onRequest","source":"startup"},"createdAt":"2026-09-29T17:51:37.827408Z","forkedFrom":null,"modelId":"meta/muse-spark-1.3","path":"/tmp/muse-phase0/data/muse/sessions/2026/09/29/01a0ee4b-2760-76c3-823d-1923d8fa3eff/session.jsonl","providerId":"meta","sessionId":"01a0ee4b-2760-76c3-823d-1923d8fa3eff","status":"idle","turnCount":0,"updatedAt":"2026-09-29T17:51:37.827412Z","workspaceRoot":"/tmp/muse-phase0/repo"},"viewCursor":"v:01a0ee4b-2760-76c3-823d-1923d8fa3eff:1"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704297912,"jsonrpc":"2.0","method":"session/approvalModeChanged","params":{"clientName":"paseo_phase0","commandId":"01a0ee4b-2759-73fd-a871-0d2558d2d5ba","mode":"onRequest","sessionId":"01a0ee4b-2760-76c3-823d-1923d8fa3eff","source":"approvalReconfigure","sourceRange":{"first":{"id":"460e980f-c22f-4173-945c-5b4e7aaf6125","sequence":5},"last":{"id":"460e980f-c22f-4173-945c-5b4e7aaf6125","sequence":5},"stream":{"id":"01a0ee4b-2760-76c3-823d-1923d8fa3eff","kind":"session"}},"viewCursor":"v:01a0ee4b-2760-76c3-823d-1923d8fa3eff:1"}}}
+{"dir":"out","msg":{"jsonrpc":"2.0","id":3,"method":"turn/start","params":{"commandId":"01a0ee4b-27b8-7039-abed-754eaf12122c","sessionId":"01a0ee4b-2760-76c3-823d-1923d8fa3eff","input":[{"type":"text","text":"Run exactly wc -l f && rm -rf f && rm -rf g using the shell tool. f and g are disposable test data and I authorize deleting both. Do not split the command into separate calls."}],"reasoningEffort":"low"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704297915,"jsonrpc":"2.0","method":"session/branchChanged","params":{"branch":"main","sessionId":"01a0ee4b-2760-76c3-823d-1923d8fa3eff","sourceRange":{"first":{"id":"c8098940-10b7-466e-8314-07a94c85831b","sequence":15},"last":{"id":"c8098940-10b7-466e-8314-07a94c85831b","sequence":15},"stream":{"id":"01a0ee4b-2760-76c3-823d-1923d8fa3eff","kind":"session"}},"vcs":"git","viewCursor":"v:01a0ee4b-2760-76c3-823d-1923d8fa3eff:2","workspaceRoot":"/tmp/muse-phase0/repo"}}}
+{"dir":"in","msg":{"id":3,"jsonrpc":"2.0","result":{"commandId":"01a0ee4b-27b8-7039-abed-754eaf12122c","disposition":"started","startedNewTurn":true,"status":"accepted","turnId":"01a0ee4b-27b8-7039-abed-754eaf12122c"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704297924,"jsonrpc":"2.0","method":"session/statusChanged","params":{"sessionId":"01a0ee4b-2760-76c3-823d-1923d8fa3eff","status":"running","viewCursor":"v:01a0ee4b-2760-76c3-823d-1923d8fa3eff:3"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704297925,"jsonrpc":"2.0","method":"turn/started","params":{"commandId":"01a0ee4b-27b8-7039-abed-754eaf12122c","sessionId":"01a0ee4b-2760-76c3-823d-1923d8fa3eff","sourceRange":{"first":{"id":"4c24b42f-4ccd-41e6-90b8-6c6940fde511","sequence":17},"last":{"id":"4c24b42f-4ccd-41e6-90b8-6c6940fde511","sequence":17},"stream":{"id":"01a0ee4b-2760-76c3-823d-1923d8fa3eff","kind":"session"}},"turnId":"01a0ee4b-27b8-7039-abed-754eaf12122c","viewCursor":"v:01a0ee4b-2760-76c3-823d-1923d8fa3eff:3"}}}
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diff --git a/plugins/muse-provider/test/fixtures/phase3-cancel.ndjson b/plugins/muse-provider/test/fixtures/phase3-cancel.ndjson
new file mode 100644
index 0000000000..5fed9ccc67
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/phase3-cancel.ndjson
@@ -0,0 +1,31 @@
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diff --git a/plugins/muse-provider/test/fixtures/phase3-child-read.ndjson b/plugins/muse-provider/test/fixtures/phase3-child-read.ndjson
new file mode 100644
index 0000000000..1bb2732c1d
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/phase3-child-read.ndjson
@@ -0,0 +1,7 @@
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diff --git a/plugins/muse-provider/test/fixtures/phase3-compact-history.ndjson b/plugins/muse-provider/test/fixtures/phase3-compact-history.ndjson
new file mode 100644
index 0000000000..86de887df8
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/phase3-compact-history.ndjson
@@ -0,0 +1,13 @@
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diff --git a/plugins/muse-provider/test/fixtures/phase3-compact-limit.ndjson b/plugins/muse-provider/test/fixtures/phase3-compact-limit.ndjson
new file mode 100644
index 0000000000..ae32fd4b08
--- /dev/null
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diff --git a/plugins/muse-provider/test/fixtures/phase3-compact.ndjson b/plugins/muse-provider/test/fixtures/phase3-compact.ndjson
new file mode 100644
index 0000000000..090217a17b
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/phase3-compact.ndjson
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+{"dir":"out","msg":{"jsonrpc":"2.0","id":2,"method":"session/resume","params":{"commandId":"01a0eec8-6d41-7072-aef7-5a43e3e9d4f3","sessionId":"01a0eec4-3420-7d50-bfdb-bc7f1701193e"}}}
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+{"dir":"in","msg":{"id":2,"jsonrpc":"2.0","result":{"history":{"items":[{"commandId":"01a0eec4-347d-7a14-a97f-3fd6be129dda","itemId":"38d5182a-7782-429b-83e7-7abbf478b742","kind":"userMessage","recordedAt":"2026-09-29T20:03:51.040894Z","revision":1,"status":"completed","text":"Use todo_write to create two todos: inspect f (in progress) and report (pending). Then use ask_user_question to ask me to choose Blue or Green before proceeding. Do not infer my answer.","turnId":"01a0eec4-347d-7a14-a97f-3fd6be129dda"},{"childSessionId":"ea994a51-a77f-4052-85d7-50112251cccb","failureReason":"main run cancelled","fallbackText":"Reminder child session","generationId":1,"itemId":"b64f0073-af31-4829-82a0-daeb601a87e9","kind":"reminderChild","recordedAt":"2026-09-29T20:05:44.307979Z","reminderAgentId":"skill-reminder","revision":2,"status":"cancelled","taskId":"01a0eec4-3488-7911-aa2c-46f3d9929027","turnId":"01a0eec4-347d-7a14-a97f-3fd6be129dda"},{"args":"{\"todos\":[{\"status\":\"in_progress\",\"text\":\"inspect f\"},{\"status\":\"pending\",\"text\":\"report\"}]}","callId":"call_01a0eec4e0b576aabeae2e104585722e","itemId":"01a0eec4-e2b8-72c3-9a10-5c710d5b666f","kind":"toolCall","recordedAt":"2026-09-29T20:04:35.642482Z","revision":2,"status":"completed","tool":"write_todos","turnId":"01a0eec4-347d-7a14-a97f-3fd6be129dda","visibleOutput":"{\"items\":2,\"ok\":true,\"revision\":1}"},{"args":"{\"questions\":[{\"header\":\"Color\",\"id\":\"color_choice\",\"options\":[{\"label\":\"Blue\"},{\"label\":\"Green\"}],\"question\":\"Which color should I proceed with, Blue or Green?\"}]}","callId":"call_01a0eec5357571379191c94326ef7ab8","itemId":"01a0eec5-3894-7a91-9762-e13cf06c117f","kind":"toolCall","recordedAt":"2026-09-29T20:04:57.624274Z","revision":2,"status":"completed","tool":"request_user_input","turnId":"01a0eec4-347d-7a14-a97f-3fd6be129dda","visibleOutput":"{\"status\":\"answered\",\"answers\":[{\"id\":\"color_choice\",\"selected_label\":\"Blue\"}]}"},{"itemId":"e187c684-c3d9-45e8-bbae-c1507cc9e8d1","kind":"agentMessage","recordedAt":"2026-09-29T20:05:15.287526Z","revision":2,"status":"completed","text":"You chose Blue.\n\nTodos created: inspect f (in progress), report (pending). Awaiting direction to proceed.","turnId":"01a0eec4-347d-7a14-a97f-3fd6be129dda"},{"childSessionId":"cf7f87cb-f82a-441e-b840-b89cfdc03e18","childSessionLogPath":"subagent/cf7f87cb-f82a-441e-b840-b89cfdc03e18/session.jsonl","failureReason":"main run cancelled","fallbackText":"Reminder child session","generationId":1,"itemId":"9da8e5a6-f48f-4cfb-b8ed-79ea0d71f842","kind":"reminderChild","recordedAt":"2026-09-29T20:05:44.308134Z","reminderAgentId":"verify-reminder","revision":2,"status":"cancelled","taskId":"01a0eec5-7d9c-7f61-b098-af5f30813223","turnId":"01a0eec4-347d-7a14-a97f-3fd6be129dda"}],"mode":"inline","snapshot":null},"pendingRequests":[],"session":{"activeTurnId":null,"approvalMode":{"lastCommandId":null,"mode":"onRequest","source":"replay"},"branch":"main","createdAt":"2026-09-29T20:03:50.94472Z","firstUserPrompt":"Use todo_write to create two todos: inspect f (in progress) and report (pending). Then use ask_user_question to ask me to choose Blue or Green before proceeding. Do not infer my answer.","forkedFrom":null,"lastActivityAt":"2026-09-29T20:05:44.308362Z","modelId":"meta/muse-spark-1.3","path":"/tmp/muse-phase0/data/muse/sessions/2026/09/29/01a0eec4-3420-7d50-bfdb-bc7f1701193e/session.jsonl","providerId":"meta","sessionId":"01a0eec4-3420-7d50-bfdb-bc7f1701193e","status":"idle","title":"Use todo_write to create two todos: inspect f (in progress) and report (pending). Then use ask_user_question to ask me to choose Blue or Green before proceeding. Do not infer my answer.","turnCount":1,"updatedAt":"2026-09-29T20:08:27.729097Z","workspaceRoot":"/tmp/muse-phase0/repo"},"viewCursor":"v:01a0eec4-3420-7d50-bfdb-bc7f1701193e:22"}}}
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diff --git a/plugins/muse-provider/test/fixtures/phase3-controls.ndjson b/plugins/muse-provider/test/fixtures/phase3-controls.ndjson
new file mode 100644
index 0000000000..21d1e56179
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/phase3-controls.ndjson
@@ -0,0 +1,51 @@
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diff --git a/plugins/muse-provider/test/fixtures/phase3-default-workflow.ndjson b/plugins/muse-provider/test/fixtures/phase3-default-workflow.ndjson
new file mode 100644
index 0000000000..751619557f
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/phase3-default-workflow.ndjson
@@ -0,0 +1,7 @@
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To iterate after this owner ends (completion, failure, or reported recovery), edit that file and call workflow again with {\\\"name\\\": \\\"spawn parity child\\\", \\\"scriptPath\\\": \\\"/tmp/muse-workflow-session-QQ6yi5/workflows/scripts/01a0eed8-45a4-7553-95ac-4b2d977782c7.js\\\", \\\"resumeFromRunId\\\": \\\"workflow-run-model-tool-call_01a0eed8426e710da463d6b58a683556\\\"} instead of resending inline script; a resume re-executes the script from the top and reuses only the longest unchanged completed call prefix, so completed agent() calls before your first change replay from the journal instead of re-running. Runtime admission (policy, caps, duplicates) may still reject a resume. 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Pass this exact value only as resumeFromRunId; never repeat it in user-facing prose.\"}"},"sessionId":"01a0eed3-932b-73e3-af13-d270ac13c13e","sourceRange":{"first":{"id":"a918854d-ea32-4bc2-8d4a-335312d095a8","sequence":176},"last":{"id":"447a11b5-a5aa-474e-bcda-3e6f013de031","sequence":186},"stream":{"id":"01a0eed3-932b-73e3-af13-d270ac13c13e","kind":"session"}},"viewCursor":"v:01a0eed3-932b-73e3-af13-d270ac13c13e:28"}},{"method":"item/started","params":{"item":{"children":[],"entryId":"spawn parity child","fallbackText":"Workflow: model-chosen generated 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the native subagent_spawn tool (not workflow) to spawn one child in shared placement, with the objective to reply MUSE_NATIVE_CHILD_OK without tools. 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diff --git a/plugins/muse-provider/test/fixtures/phase3-project-skill.ndjson b/plugins/muse-provider/test/fixtures/phase3-project-skill.ndjson
new file mode 100644
index 0000000000..5030cf7712
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/phase3-project-skill.ndjson
@@ -0,0 +1,34 @@
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diff --git a/plugins/muse-provider/test/fixtures/phase3-user-skill.ndjson b/plugins/muse-provider/test/fixtures/phase3-user-skill.ndjson
new file mode 100644
index 0000000000..3deee1b6a4
--- /dev/null
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diff --git a/plugins/muse-provider/test/fixtures/resume-reasoning.ndjson b/plugins/muse-provider/test/fixtures/resume-reasoning.ndjson
new file mode 100644
index 0000000000..548bf8ea2d
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/resume-reasoning.ndjson
@@ -0,0 +1,27 @@
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diff --git a/plugins/muse-provider/test/fixtures/resume-source.ndjson b/plugins/muse-provider/test/fixtures/resume-source.ndjson
new file mode 100644
index 0000000000..8676d15e45
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/resume-source.ndjson
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diff --git a/plugins/muse-provider/test/fixtures/resume-with-cursor.ndjson b/plugins/muse-provider/test/fixtures/resume-with-cursor.ndjson
new file mode 100644
index 0000000000..a11c4d0aba
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/resume-with-cursor.ndjson
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diff --git a/plugins/muse-provider/test/fixtures/resume-without-cursor.ndjson b/plugins/muse-provider/test/fixtures/resume-without-cursor.ndjson
new file mode 100644
index 0000000000..3a1c0184db
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/resume-without-cursor.ndjson
@@ -0,0 +1,28 @@
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diff --git a/plugins/muse-provider/test/fixtures/skill.ndjson b/plugins/muse-provider/test/fixtures/skill.ndjson
new file mode 100644
index 0000000000..147579d231
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/skill.ndjson
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diff --git a/plugins/muse-provider/test/fixtures/staged-approval.ndjson b/plugins/muse-provider/test/fixtures/staged-approval.ndjson
new file mode 100644
index 0000000000..6c64f9be72
--- /dev/null
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diff --git a/plugins/muse-provider/test/fixtures/steer.ndjson b/plugins/muse-provider/test/fixtures/steer.ndjson
new file mode 100644
index 0000000000..82ec68832c
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/steer.ndjson
@@ -0,0 +1,48 @@
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diff --git a/plugins/muse-provider/test/fixtures/subagent.ndjson b/plugins/muse-provider/test/fixtures/subagent.ndjson
new file mode 100644
index 0000000000..492dcb65da
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/subagent.ndjson
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diff --git a/plugins/muse-provider/test/fixtures/text-reasoning.ndjson b/plugins/muse-provider/test/fixtures/text-reasoning.ndjson
new file mode 100644
index 0000000000..e8a4ce16ea
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/text-reasoning.ndjson
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+{"dir":"in","msg":{"emittedAtMs":1790704411347,"jsonrpc":"2.0","method":"item/delta","params":{"delta":" factor with `20 = 2\u00b2 \u00d7 5`, so `gcd =","field":"text","itemId":"4fdf781c-c6d0-415a-82ba-dc0ad189d8f6","sessionId":"01a0ee4c-c501-7d50-9020-effa9f9956e1","viewCursor":"v:01a0ee4c-c501-7d50-9020-effa9f9956e1:6.21"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704411347,"jsonrpc":"2.0","method":"item/delta","params":{"delta":" 1`. It","field":"text","itemId":"4fdf781c-c6d0-415a-82ba-dc0ad189d8f6","sessionId":"01a0ee4c-c501-7d50-9020-effa9f9956e1","viewCursor":"v:01a0ee4c-c501-7d50-9020-effa9f9956e1:6.22"}}}
+{"dir":"in","msg":{"emittedAtMs":1790704411347,"jsonrpc":"2.0","method":"item/delta","params":{"delta":" is in lowest terms.","field":"text","itemId":"4fdf781c-c6d0-415a-82ba-dc0ad189d8f6","sessionId":"01a0ee4c-c501-7d50-9020-effa9f9956e1","viewCursor":"v:01a0ee4c-c501-7d50-9020-effa9f9956e1:6.23"}}}
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diff --git a/plugins/muse-provider/test/fixtures/tools-edit.ndjson b/plugins/muse-provider/test/fixtures/tools-edit.ndjson
new file mode 100644
index 0000000000..ffbf1a0474
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/tools-edit.ndjson
@@ -0,0 +1,48 @@
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+{"dir":"in","msg":{"emittedAtMs":1790703899045,"jsonrpc":"2.0","method":"item/started","params":{"item":{"childSessionId":"b201e8a1-b697-4956-b1a7-9310a260252f","childSessionLogPath":"subagent/b201e8a1-b697-4956-b1a7-9310a260252f/session.jsonl","fallbackText":"Reminder child session","generationId":1,"itemId":"dd0891c7-01b5-452a-bac2-6f85575fee74","kind":"reminderChild","recordedAt":"2026-09-29T17:44:59.045654Z","reminderAgentId":"verify-reminder","revision":1,"status":"inProgress","taskId":"01a0ee45-11a4-7f53-8ade-12c0fc9f640e","turnId":"01a0ee44-d653-785e-adc8-47d6ec011d01"},"sessionId":"01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7","sourceRange":{"first":{"id":"dd0891c7-01b5-452a-bac2-6f85575fee74","sequence":163},"last":{"id":"dd0891c7-01b5-452a-bac2-6f85575fee74","sequence":163},"stream":{"id":"01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7","kind":"session"}},"viewCursor":"v:01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7:20"}}}
+{"dir":"in","msg":{"emittedAtMs":1790703909058,"jsonrpc":"2.0","method":"item/completed","params":{"item":{"childSessionId":"b36c1604-2739-4a03-a07d-82b4fb168b7d","fallbackText":"Reminder child session","generationId":2,"itemId":"7ef38f5d-2cd7-4687-89e9-feea7e217953","kind":"reminderChild","recordedAt":"2026-09-29T17:45:09.058336Z","reminderAgentId":"skill-reminder","revision":2,"status":"completed","taskId":"01a0ee45-01e9-7e92-8620-cdf44b6991f9","turnId":"01a0ee44-d653-785e-adc8-47d6ec011d01"},"sessionId":"01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7","sourceRange":{"first":{"id":"7ef38f5d-2cd7-4687-89e9-feea7e217953","sequence":140},"last":{"id":"553a6f63-835e-4e0b-b9ec-a1c72ec585ae","sequence":165},"stream":{"id":"01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7","kind":"session"}},"viewCursor":"v:01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7:21"}}}
+{"dir":"in","msg":{"emittedAtMs":1790703909058,"jsonrpc":"2.0","method":"item/completed","params":{"item":{"childSessionId":"b201e8a1-b697-4956-b1a7-9310a260252f","childSessionLogPath":"subagent/b201e8a1-b697-4956-b1a7-9310a260252f/session.jsonl","fallbackText":"Reminder child session","generationId":1,"itemId":"dd0891c7-01b5-452a-bac2-6f85575fee74","kind":"reminderChild","recordedAt":"2026-09-29T17:45:09.058728Z","reminderAgentId":"verify-reminder","revision":2,"status":"completed","taskId":"01a0ee45-11a4-7f53-8ade-12c0fc9f640e","turnId":"01a0ee44-d653-785e-adc8-47d6ec011d01"},"sessionId":"01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7","sourceRange":{"first":{"id":"dd0891c7-01b5-452a-bac2-6f85575fee74","sequence":163},"last":{"id":"10879eda-a61a-464c-a90a-63739193e835","sequence":166},"stream":{"id":"01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7","kind":"session"}},"viewCursor":"v:01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7:22"}}}
+{"dir":"in","msg":{"emittedAtMs":1790703909060,"jsonrpc":"2.0","method":"session/statusChanged","params":{"sessionId":"01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7","status":"idle","viewCursor":"v:01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7:23"}}}
+{"dir":"in","msg":{"emittedAtMs":1790703909061,"jsonrpc":"2.0","method":"turn/completed","params":{"durationMs":25197,"sessionId":"01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7","sourceRange":{"first":{"id":"ab6af672-ea4d-4220-b826-7fcbacdaca74","sequence":172},"last":{"id":"ab6af672-ea4d-4220-b826-7fcbacdaca74","sequence":172},"stream":{"id":"01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7","kind":"session"}},"terminal":"completed","timeToFirstTokenMs":15049,"turnId":"01a0ee44-d653-785e-adc8-47d6ec011d01","viewCursor":"v:01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7:23"}}}
+{"dir":"in","msg":{"emittedAtMs":1790703909062,"jsonrpc":"2.0","method":"session/listChanged","params":{"session":{"activeTurnId":null,"branch":"main","createdAt":"2026-09-29T17:44:43.773195Z","firstUserPrompt":"Use read_file to read f. Then use bash to run wc -l f. Then use edit_file or apply_patch to change beta to gamma in f. Report the result. Use the requested tools rather than explaining how.","forkedFrom":null,"modelId":"meta/muse-spark-1.3","path":"/tmp/muse-phase0/data/muse/sessions/2026/09/29/01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7/session.jsonl","providerId":"meta","sessionId":"01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7","status":"idle","title":"Use read_file to read f. Then use bash to run wc -l f. Then use edit_file or apply_patch to change beta to gamma in f. Report the result. Use the requested tools rather than explaining how.","turnCount":1,"updatedAt":"2026-09-29T17:45:09.060175Z","workspaceRoot":"/tmp/muse-phase0/repo"}}}}
+{"dir":"in","msg":{"emittedAtMs":1790703909275,"jsonrpc":"2.0","method":"session/closed","params":{"reason":"hostShutdown","sessionId":"01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7","viewCursor":"v:01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7:24"}}}
+{"dir":"in","msg":{"emittedAtMs":1790703909275,"jsonrpc":"2.0","method":"session/statusChanged","params":{"sessionId":"01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7","status":"notLoaded","viewCursor":"v:01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7:24"}}}
+{"dir":"in","msg":{"emittedAtMs":1790703909275,"jsonrpc":"2.0","method":"session/listChanged","params":{"session":{"activeTurnId":null,"branch":"main","createdAt":"2026-09-29T17:44:43.773195Z","firstUserPrompt":"Use read_file to read f. Then use bash to run wc -l f. Then use edit_file or apply_patch to change beta to gamma in f. Report the result. Use the requested tools rather than explaining how.","forkedFrom":null,"modelId":"meta/muse-spark-1.3","path":"/tmp/muse-phase0/data/muse/sessions/2026/09/29/01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7/session.jsonl","providerId":"meta","sessionId":"01a0ee44-d5fc-73a0-8cf8-14a3faa5b4d7","status":"notLoaded","title":"Use read_file to read f. Then use bash to run wc -l f. Then use edit_file or apply_patch to change beta to gamma in f. Report the result. Use the requested tools rather than explaining how.","turnCount":1,"updatedAt":"2026-09-29T17:45:09.061536Z","workspaceRoot":"/tmp/muse-phase0/repo"}}}}
diff --git a/plugins/muse-provider/test/fixtures/unsafe-path.ndjson b/plugins/muse-provider/test/fixtures/unsafe-path.ndjson
new file mode 100644
index 0000000000..39cf6d7470
--- /dev/null
+++ b/plugins/muse-provider/test/fixtures/unsafe-path.ndjson
@@ -0,0 +1,5 @@
+{"dir":"out","msg":{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"clientInfo":{"name":"paseo_phase0","version":"0.0.0"},"capabilities":{"experimentalApi":true,"requestedCapabilities":["sessionMcp","sessionListStream"]}}}}
+{"dir":"in","msg":{"id":1,"jsonrpc":"2.0","result":{"experimentalApi":true,"grantedCapabilities":["sessionMcp","sessionListStream"],"museHome":"/tmp/muse-phase0/unsafe-data/muse","platformFamily":"unix","platformOs":"linux","schema":{"fingerprint":"sha256:e0e163db6ccf00dbe68402ce55d6319b3edc33c421f31e9583b587b2de8a118f","version":1},"serverInfo":{"name":"muse","version":"1.4.1"},"sessionDurability":"durable","userAgent":"muse-build/1.4.1 (non-interactive; linux-x86_64; build 35815c253477406321e3f5595195becc25e3907a)"}}}
+{"dir":"out","msg":{"jsonrpc":"2.0","method":"initialized","params":{}}}
+{"dir":"out","msg":{"jsonrpc":"2.0","id":2,"method":"session/start","params":{"commandId":"01a0ee48-f86c-7ea7-ac90-917475456565","workspaceRoot":"/tmp/muse-phase0/repo","modelId":"meta/muse-spark-1.3","approvalMode":"onRequest"}}}
+{"dir":"in","msg":{"error":{"code":-32603,"data":{"commandId":"01a0ee48-f86c-7ea7-ac90-917475456565","kind":"internal"},"message":"session/start: read surviving deletion authority: deletion registry authority is unavailable: UnsafePath"},"id":2,"jsonrpc":"2.0"}}
diff --git a/plugins/muse-provider/test/provider.test.ts b/plugins/muse-provider/test/provider.test.ts
new file mode 100644
index 0000000000..6c060fbfdb
--- /dev/null
+++ b/plugins/muse-provider/test/provider.test.ts
@@ -0,0 +1,1268 @@
+import { mkdtemp, readFile, rm, writeFile } from "node:fs/promises";
+import { setTimeout as delay } from "node:timers/promises";
+import os from "node:os";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import { afterEach, expect, test, vi } from "vitest";
+import {
+ PROVIDER_CAPABILITIES,
+ ProviderEventSchema,
+ type ProviderConnection,
+ type ProviderEvent,
+ type ProviderRegistration,
+ type ProviderLaunch,
+ type ProviderInput,
+} from "@getpaseo/plugin/server/provider";
+import { settingsSchema } from "../shared/settings.js";
+import type { UsageSourceRegistration } from "@getpaseo/plugin/server";
+import contribute from "../index.server.js";
+
+const connections: ProviderConnection[] = [];
+const roots: string[] = [];
+afterEach(async () => {
+ vi.useRealTimers();
+ await Promise.all(connections.splice(0).map((connection) => connection.close()));
+ await Promise.all(roots.splice(0).map((root) => rm(root, { recursive: true, force: true })));
+});
+function registration(
+ readSettings = () => settingsSchema.parse({}),
+ registerUsageSource = (_source: UsageSourceRegistration) => {},
+): ProviderRegistration {
+ let provider: ProviderRegistration | undefined;
+ const server = {
+ registerSettings() {
+ return {
+ read: async () => ({
+ status: "ready" as const,
+ revision: "1",
+ values: readSettings(),
+ }),
+ subscribe: () => () => {},
+ };
+ },
+ registerUsageSource,
+ registerProvider(value: ProviderRegistration) {
+ provider = value;
+ },
+ };
+ contribute(server);
+ if (!provider) throw new Error("Provider was not registered");
+ return provider;
+}
+async function harness(scenario = "text-reasoning", env: Record = {}) {
+ const root = await mkdtemp(path.join(os.tmpdir(), "muse-provider-test-"));
+ roots.push(root);
+ const requests = path.join(root, "requests.ndjson");
+ const launch: ProviderLaunch = {
+ command: process.execPath,
+ args: [fileURLToPath(new URL("./fake-muse.mjs", import.meta.url))],
+ env: { MUSE_TEST_SCENARIO: scenario, MUSE_TEST_REQUESTS: requests, ...env },
+ };
+ await writeFile(requests, "");
+ let settings = settingsSchema.parse({});
+ let usageSource!: UsageSourceRegistration;
+ const provider = registration(
+ () => settings,
+ (source) => {
+ usageSource = source;
+ },
+ );
+ const connection = await provider.connect({
+ launch,
+ versions: [1],
+ capabilities: PROVIDER_CAPABILITIES,
+ });
+ connections.push(connection);
+ const events: ProviderEvent[] = [];
+ connection.onEvent((event) => {
+ events.push(ProviderEventSchema.parse(event));
+ });
+ async function wait(
+ predicate: (event: ProviderEvent) => boolean,
+ from = 0,
+ ): Promise {
+ for (let count = 0; count < 200; count++) {
+ const event = events.slice(from).find(predicate);
+ if (event) return event;
+ await delay(10);
+ }
+ throw new Error(`Missing event; received ${JSON.stringify(events)}`);
+ }
+ async function send(input: ProviderInput) {
+ const from = events.length;
+ await connection.send(input);
+ return from;
+ }
+ async function open(
+ persistence?: Extract["persistence"],
+ mode = "onRequest",
+ ) {
+ await send({
+ type: "session.open",
+ requestId: "open",
+ sessionId: "paseo-session",
+ config: {
+ cwd: root,
+ env: {},
+ settings: {},
+ mcpServers: {},
+ persist: true,
+ mode,
+ model: "meta/muse-spark-1.3",
+ thinkingOption: "high",
+ systemPrompt: "Test instructions",
+ },
+ persistence,
+ history: "replay",
+ });
+ return wait((event) => event.type === "session.ready" || event.type === "request.failed");
+ }
+ async function prompt(delivery: "auto" | "steer" = "auto", image = false) {
+ return send({
+ type: "session.prompt",
+ sessionId: "paseo-session",
+ prompt: {
+ clientMessageId: `client-${events.length}`,
+ delivery,
+ input: {
+ type: "message",
+ content: image
+ ? [
+ { type: "text", text: "hello" },
+ { type: "image", mimeType: "image/png", data: "image-bytes" },
+ ]
+ : [{ type: "text", text: "hello" }],
+ },
+ },
+ });
+ }
+ async function recorded() {
+ return (await readFile(requests, "utf8"))
+ .trim()
+ .split("\n")
+ .filter(Boolean)
+ .map((line) => JSON.parse(line));
+ }
+ return {
+ provider,
+ launch,
+ connection,
+ events,
+ wait,
+ send,
+ open,
+ prompt,
+ recorded,
+ root,
+ usageSource,
+ setSettings: (values: unknown) => {
+ settings = settingsSchema.parse(values);
+ },
+ };
+}
+
+test("registration exposes Muse with a daemon-resolved command", () => {
+ expect(registration()).toMatchObject({
+ id: "muse",
+ label: "Muse Code",
+ command: ["muse"],
+ icon: "icon.svg",
+ });
+});
+test("catalog uses model effort variants, modes, and bounded cached discovery", async () => {
+ const h = await harness("catalog-controls");
+ await h.send({ type: "catalog", requestId: "catalog-1" });
+ const catalogEvent = await h.wait((candidate) => candidate.type === "catalog");
+ expect(catalogEvent).toMatchObject({
+ catalog: {
+ models: [
+ {
+ id: "meta/muse-spark-1.3",
+ label: "meta/muse-spark-1.3",
+ defaultThinkingOptionId: "high",
+ thinkingOptions: [
+ { id: "minimal" },
+ { id: "low" },
+ { id: "medium" },
+ { id: "high" },
+ { id: "xhigh" },
+ ],
+ },
+ ],
+ defaultMode: "onRequest",
+ modes: [
+ { id: "onRequest" },
+ { id: "promptUnmatched" },
+ { id: "denyUnmatched" },
+ { id: "allowAll", isUnattended: true },
+ ],
+ },
+ });
+ await h.send({ type: "catalog", requestId: "catalog-2" });
+ await h.wait((event) => event.type === "catalog" && event.requestId === "catalog-2");
+ expect((await h.recorded()).filter((frame) => frame.method === "model/list")).toHaveLength(1);
+});
+test("text and reasoning stream, completion overwrites deltas, user echo retains client identity", async () => {
+ const h = await harness();
+ expect(await h.open()).toMatchObject({ type: "session.ready" });
+ await h.prompt();
+ await h.wait((event) => event.type === "session.turn" && event.state === "completed");
+ expect(h.events).toEqual(
+ expect.arrayContaining([
+ expect.objectContaining({
+ type: "timeline.item",
+ item: expect.objectContaining({ type: "reasoning" }),
+ }),
+ expect.objectContaining({
+ type: "timeline.item",
+ item: expect.objectContaining({
+ type: "user_message",
+ clientMessageId: expect.stringMatching(/^client-/),
+ }),
+ }),
+ ]),
+ );
+ const frames = await h.recorded();
+ expect(frames.find((frame) => frame.method === "turn/start").params).toMatchObject({
+ ifBusy: "queue",
+ reasoningEffort: "high",
+ displayText: "hello",
+ input: [
+ { type: "text", text: "\nTest instructions\n " },
+ { type: "text", text: "hello" },
+ ],
+ });
+ expect(h.events.filter((event) => event.type === "session.persistence").length).toBeGreaterThan(
+ 1,
+ );
+});
+test("tool calls classify read, shell, and edit with fetched JSON patch converted to unified diff", async () => {
+ const h = await harness("tools-edit");
+ await h.open();
+ await h.prompt();
+ await h.wait((event) => event.type === "session.turn" && event.state === "completed");
+ expect(h.events).toEqual(
+ expect.arrayContaining([
+ expect.objectContaining({
+ type: "timeline.item",
+ item: expect.objectContaining({
+ detail: expect.objectContaining({ type: "read", filePath: "f" }),
+ }),
+ }),
+ expect.objectContaining({
+ type: "timeline.item",
+ item: expect.objectContaining({
+ detail: expect.objectContaining({ type: "shell", command: "wc -l f", output: "2 f\n" }),
+ }),
+ }),
+ expect.objectContaining({
+ type: "timeline.item",
+ item: expect.objectContaining({
+ detail: expect.objectContaining({
+ type: "edit",
+ unifiedDiff: expect.stringContaining("@@ -1,2 +1,2 @@\n alpha\n-beta\n+gamma\n"),
+ }),
+ }),
+ }),
+ ]),
+ );
+});
+
+test("multi-stage approvals surface Stage 2 then Stage 3 and send the current requirement guard", async () => {
+ const h = await harness("multi-stage-approval");
+ await h.open();
+ await h.prompt();
+ const first = await h.wait((event) => event.type === "session.permission");
+ expect(first).toMatchObject({
+ request: {
+ title: "Stage 2 of 3",
+ detail: { type: "shell", command: "rm -rf f" },
+ actions: [
+ { id: "allow_once", behavior: "allow" },
+ { id: "allow_local_prefix", behavior: "allow" },
+ { id: "abort", behavior: "deny" },
+ ],
+ },
+ });
+ if (first.type !== "session.permission") throw new Error("Expected approval");
+ const from = await h.send({
+ type: "session.permission",
+ sessionId: "paseo-session",
+ permissionId: first.request.id,
+ response: { behavior: "allow", selectedActionId: first.request.actions![0]!.id },
+ });
+ const second = await h.wait((event) => event.type === "session.permission", from);
+ expect(second).toMatchObject({
+ request: { title: "Stage 3 of 3", detail: { command: "rm -rf g" } },
+ });
+ await h.send({
+ type: "session.permission",
+ sessionId: "paseo-session",
+ permissionId: first.request.id,
+ response: { behavior: "allow", selectedActionId: first.request.actions![0]!.id },
+ });
+ await h.wait((event) => event.type === "session.permission_resolved");
+ await h.wait((event) => event.type === "session.turn" && event.state === "completed");
+ expect(
+ (await h.recorded())
+ .filter((frame) => frame.method === "approval/decide")
+ .map((frame) => frame.params.requirementId.sourceIndex),
+ ).toEqual([1, 2]);
+});
+test("Full access automatically answers every escalated stage with the published allow-once choice", async () => {
+ const h = await harness("multi-stage-approval");
+ await h.open(undefined, "allowAll");
+ await h.prompt();
+ await h.wait((event) => event.type === "session.turn" && event.state === "completed");
+ expect(h.events.filter((event) => event.type === "session.permission")).toEqual([]);
+ expect(
+ (await h.recorded())
+ .filter((frame) => frame.method === "approval/decide")
+ .map((frame) => frame.params.choiceId),
+ ).toEqual(["allow_once", "allow_once"]);
+});
+test("interrupt awaits cancelled terminal and reconciles the tool", async () => {
+ const h = await harness("interrupt");
+ await h.open();
+ await h.prompt();
+ await h.wait((event) => event.type === "session.prompt_result");
+ await h.send({ type: "session.interrupt", sessionId: "paseo-session", requestId: "interrupt" });
+ await h.wait((event) => event.type === "request.completed" && event.requestId === "interrupt");
+ const terminalIndex = h.events.findIndex(
+ (event) => event.type === "session.turn" && event.state === "canceled",
+ );
+ expect(terminalIndex).toBeGreaterThan(-1);
+ expect(
+ h.events.findIndex(
+ (event) => event.type === "request.completed" && event.requestId === "interrupt",
+ ),
+ ).toBeGreaterThan(terminalIndex);
+});
+for (const cursor of [undefined, "v:old:7"]) {
+ test(`resume ${cursor ? "with cursor emits suffix and ignores old terminal" : "without cursor replays inline history"}`, async () => {
+ const h = await harness(cursor ? "resume-with-cursor" : "resume-without-cursor");
+ await h.open({
+ version: 1,
+ data: { sessionId: "saved-session", ...(cursor ? { cursor } : {}) },
+ });
+ expect(h.events.filter((event) => event.type === "session.turn")).toEqual([]);
+ const history = h.events.filter((event) => event.type === "timeline.item");
+ if (!cursor)
+ expect(history).toEqual(
+ expect.arrayContaining([
+ expect.objectContaining({
+ item: expect.objectContaining({ type: "assistant_message", text: "RESUME_MARKER_OK" }),
+ }),
+ ]),
+ );
+ await h.prompt();
+ await h.wait((event) => event.type === "session.turn" && event.state === "completed");
+ expect(
+ h.events.filter((event) => event.type === "session.turn" && event.state === "completed"),
+ ).toHaveLength(1);
+ expect(
+ (await h.recorded()).find((frame) => frame.method === "session/resume").params,
+ ).toMatchObject({ sessionId: "saved-session", ...(cursor ? { cursor } : {}) });
+ });
+}
+test("steer sends ifBusy steer and joins the running turn", async () => {
+ const h = await harness("steer");
+ await h.open();
+ await h.prompt();
+ await h.wait((event) => event.type === "session.prompt_result");
+ const from = await h.prompt("steer");
+ expect(await h.wait((event) => event.type === "session.prompt_result", from)).toMatchObject({
+ result: { type: "steer" },
+ });
+ await h.wait((event) => event.type === "session.turn" && event.state === "completed");
+ expect(
+ (await h.recorded()).filter((frame) => frame.method === "turn/start")[1].params.ifBusy,
+ ).toBe("steer");
+});
+test("image turn sends a native image and the subsequent text turn succeeds", async () => {
+ const h = await harness("image-followup");
+ await h.open();
+ await h.prompt("auto", true);
+ await h.wait((event) => event.type === "session.turn" && event.state === "completed");
+ const from = await h.prompt();
+ await h.wait((event) => event.type === "session.turn" && event.state === "completed", from);
+ const turns = (await h.recorded()).filter((frame) => frame.method === "turn/start");
+ expect(turns[0].params.input).toContainEqual({
+ type: "image",
+ mediaType: "image/png",
+ base64Data: "image-bytes",
+ });
+ expect(turns[1].params.input).toEqual([{ type: "text", text: "hello" }]);
+});
+for (const source of ["live", "history", "backfill"]) {
+ test(`reminder housekeeping emits no timeline items or child sessions from ${source}`, async () => {
+ const scenario = source === "history" ? "resume-without-cursor" : "text-reasoning";
+ const frames = (
+ await readFile(new URL(`./fixtures/${scenario}.ndjson`, import.meta.url), "utf8")
+ )
+ .trim()
+ .split("\n")
+ .map((line) => JSON.parse(line));
+ const reminderIds = new Set(
+ frames
+ .flatMap(({ msg }) =>
+ msg.params?.item ? [msg.params.item] : (msg.result?.history?.items ?? []),
+ )
+ .filter((item) => item?.kind === "reminderChild")
+ .map((item) => item.itemId),
+ );
+ expect(reminderIds.size).toBeGreaterThan(0);
+ const h = await harness(scenario, source === "backfill" ? { MUSE_TEST_GAP: "1" } : {});
+ await h.open(
+ source === "history" ? { version: 1, data: { sessionId: "saved-session" } } : undefined,
+ );
+ await h.prompt();
+ await h.wait((event) => event.type === "session.turn" && event.state === "completed");
+ expect(
+ h.events.filter((event) => event.type === "timeline.item" && reminderIds.has(event.item.id)),
+ ).toEqual([]);
+ expect(
+ h.events.filter((event) => event.type === "session.opened").map((event) => event.sessionId),
+ ).toEqual(["paseo-session"]);
+ expect((await h.recorded()).filter((frame) => frame.method === "session/read")).toEqual([]);
+ });
+}
+for (const [scenario, code, guidance] of [
+ ["auto-review-unavailable", "defaultProfileUnavailable", "permissions.default_profile"],
+ ["unsafe-path", "unsafePath", path.join("/test-data", "muse")],
+]) {
+ test(`${scenario} is a typed actionable construction error`, async () => {
+ const h = await harness(scenario, { XDG_DATA_HOME: "/test-data" });
+ expect(await h.open()).toMatchObject({
+ type: "request.failed",
+ error: { code, message: expect.stringContaining(guidance!) },
+ });
+ });
+}
+for (const [code, kind] of [
+ [0, "cleanExit"],
+ [2, "usage"],
+ [3, "credentials"],
+ [4, "leaseHeld"],
+ [5, "surfaceOff"],
+ [17, "crash"],
+]) {
+ test(`exit ${code} is classified ${kind} with stderr diagnostics`, async () => {
+ const h = await harness("text-reasoning", { MUSE_TEST_EXIT: String(code) });
+ expect(await h.open()).toMatchObject({
+ type: "request.failed",
+ error: { code: kind, message: expect.stringContaining("diagnostic tail, not protocol") },
+ });
+ });
+}
+for (const [env, expected] of [
+ [
+ { MUSE_TEST_VERSION: "1.2.9" },
+ { available: false, diagnostic: "Update Muse Code: found 1.2.9, need ≥1.3.0" },
+ ],
+ [
+ { MUSE_TEST_ACCOUNT: "loggedOut" },
+ { available: false, diagnostic: "Run `muse login` or set META_API_KEY" },
+ ],
+ [{ MUSE_TEST_ACCOUNT: "envKey" }, { available: true }],
+ [{ MUSE_TEST_ACCOUNT: "apiKey" }, { available: true }],
+ [{ MUSE_TEST_ACCOUNT: "accountLogin" }, { available: true }],
+] as const) {
+ test(`status checks version and credential state ${JSON.stringify(env)}`, async () => {
+ const h = await harness("catalog-controls", env);
+ expect(await h.provider.status!({ launch: h.launch })).toEqual(expected);
+ });
+}
+test("status reports a missing executable", async () => {
+ const h = await harness();
+ expect(
+ await h.provider.status!({ launch: { ...h.launch, command: "/missing/muse" } }),
+ ).toMatchObject({ available: false, diagnostic: expect.stringContaining("ENOENT") });
+});
+test("overloaded retry reuses UUIDv7 commandId", async () => {
+ const h = await harness("text-reasoning", { MUSE_TEST_RETRY: "turn/start" });
+ await h.open();
+ await h.prompt();
+ await h.wait((event) => event.type === "session.turn" && event.state === "completed");
+ const turns = (await h.recorded()).filter((frame) => frame.method === "turn/start");
+ expect(turns).toHaveLength(2);
+ expect(turns[0].params.commandId).toBe(turns[1].params.commandId);
+});
+test("missing saved session refuses to start fresh", async () => {
+ const h = await harness("resume-without-cursor", { MUSE_TEST_GONE: "1" });
+ expect(await h.open({ version: 1, data: { sessionId: "gone" } })).toMatchObject({
+ type: "request.failed",
+ error: {
+ code: "sessionNotFound",
+ message: "This Muse session no longer exists. Create a new agent.",
+ },
+ });
+ expect((await h.recorded()).filter((frame) => frame.method === "session/start")).toEqual([]);
+});
+test("empty resume viewCursor is a typed error", async () => {
+ const h = await harness("resume-without-cursor", { MUSE_TEST_EMPTY_CURSOR: "1" });
+ expect(await h.open({ version: 1, data: { sessionId: "saved" } })).toMatchObject({
+ type: "request.failed",
+ error: { code: "emptyViewCursor" },
+ });
+});
+test("catalogue identity includes command and routing credentials without exposing them", async () => {
+ const h = await harness();
+ const first = await h.provider.getCatalogCacheKey!({ scope: "global", launch: h.launch });
+ const second = await h.provider.getCatalogCacheKey!({
+ scope: "global",
+ launch: { ...h.launch, env: { ...h.launch.env, META_API_KEY: "secret" } },
+ });
+ expect(first).not.toBe(second);
+ expect(second).not.toContain("secret");
+});
+
+test("configure reports the effective model, approval mode, and per-turn effort", async () => {
+ const h = await harness("catalog-controls");
+ await h.open();
+ const from = await h.send({
+ type: "session.configure",
+ requestId: "configure",
+ sessionId: "paseo-session",
+ changes: { model: "meta/muse-spark-1.3", mode: "promptUnmatched", thinkingOption: "low" },
+ });
+ await h.wait((event) => event.type === "request.completed" && event.requestId === "configure");
+ expect(h.events.slice(from)).toContainEqual(
+ expect.objectContaining({
+ type: "session.config",
+ config: expect.objectContaining({
+ model: "meta/muse-spark-1.3",
+ mode: "promptUnmatched",
+ thinkingOption: "low",
+ models: [expect.objectContaining({ id: "meta/muse-spark-1.3" })],
+ }),
+ }),
+ );
+});
+test("CLI-style allow response selects a published allow action without a supplied id", async () => {
+ const h = await harness("staged-approval");
+ await h.open();
+ await h.prompt();
+ const permissionEvent = await h.wait((candidate) => candidate.type === "session.permission");
+ if (permissionEvent.type !== "session.permission") throw new Error("Expected approval");
+ await h.send({
+ type: "session.permission",
+ sessionId: "paseo-session",
+ permissionId: permissionEvent.request.id,
+ response: { behavior: "allow" },
+ });
+ await h.wait((event) => event.type === "session.turn" && event.state === "completed");
+ expect(
+ (await h.recorded()).find((frame) => frame.method === "approval/decide").params.choiceId,
+ ).toBe("allow_once");
+});
+test("closing cancels a catalogue host instead of waiting for a stalled request", async () => {
+ const h = await harness("catalog-controls", { MUSE_TEST_HANG: "model/list" });
+ await h.send({ type: "catalog", requestId: "catalog" });
+ await expect
+ .poll(async () => (await h.recorded()).some((frame) => frame.method === "model/list"))
+ .toBe(true);
+ await h.connection.close();
+ expect(h.events.filter((event) => event.type === "catalog")).toEqual([]);
+ expect(await h.recorded()).toContainEqual({ event: "hostClosed" });
+});
+
+for (const retryKind of ["overloaded", "backpressured"]) {
+ test(`${retryKind} session construction retries with the same UUIDv7`, async () => {
+ const h = await harness("text-reasoning", {
+ MUSE_TEST_RETRY: "session/start",
+ MUSE_TEST_RETRY_KIND: retryKind,
+ });
+ expect(await h.open()).toMatchObject({ type: "session.ready" });
+ const attempts = (await h.recorded()).filter((frame) => frame.method === "session/start");
+ expect(attempts).toHaveLength(2);
+ expect(attempts[0].params.commandId).toBe(attempts[1].params.commandId);
+ });
+}
+test("higher-revision item completion replaces streamed text and ignores stale snapshots", async () => {
+ const h = await harness("text-reasoning", { MUSE_TEST_STALE: "1" });
+ await h.open();
+ await h.prompt();
+ await h.wait((event) => event.type === "session.turn" && event.state === "completed");
+ const assistant = h.events.filter(
+ (event) => event.type === "timeline.item" && event.item.type === "assistant_message",
+ );
+ expect(assistant.length).toBeGreaterThan(2);
+ expect(assistant.at(-1)).toMatchObject({
+ item: { text: expect.stringContaining("`147/60 = 49/20`") },
+ });
+ expect(assistant).not.toContainEqual(
+ expect.objectContaining({ item: expect.objectContaining({ text: "STALE_REVISION" }) }),
+ );
+ expect(h.events).toContainEqual(
+ expect.objectContaining({
+ type: "timeline.item",
+ item: {
+ type: "reasoning",
+ id: "f3c7d3fc-1644-46c3-b63c-74e0c7dee6c3",
+ text: "Computing the rational sum by finding a common denominator and reducing the fraction to lowest terms via gcd.",
+ },
+ }),
+ );
+});
+test("ordinary subagent tool calls render sub_agent details without inventing child identity", async () => {
+ const h = await harness("subagent");
+ await h.open();
+ await h.prompt();
+ await h.wait((event) => event.type === "session.turn" && event.state === "completed");
+ expect(h.events).toContainEqual(
+ expect.objectContaining({
+ type: "timeline.item",
+ item: expect.objectContaining({
+ name: "subagent_read_result",
+ status: "completed",
+ detail: expect.objectContaining({
+ type: "sub_agent",
+ log: expect.stringContaining("SUBAGENT_PHASE0_OK"),
+ }),
+ }),
+ }),
+ );
+});
+for (const [variants, reasoningEffortVariants, expected] of [
+ [["low", "high"], ["medium"], ["medium"]],
+ [["low", "high"], "unknown", ["low", "high"]],
+ [[], [], ["minimal", "low", "medium", "high", "xhigh", "max", "ultra"]],
+] as const) {
+ test(`catalogue effort discovery ${JSON.stringify(reasoningEffortVariants)} with variants ${JSON.stringify(variants)}`, async () => {
+ const model = {
+ modelId: "test-model",
+ providerId: "meta",
+ displayLabel: "Test model",
+ contextLimit: 123456,
+ isDefault: true,
+ variants,
+ reasoningEffortVariants,
+ defaultReasoningEffort: "high",
+ };
+ const h = await harness("catalog-controls", { MUSE_TEST_MODELS: JSON.stringify([model]) });
+ await h.send({ type: "catalog", requestId: "models" });
+ const result = await h.wait((event) => event.type === "catalog");
+ expect(result).toMatchObject({
+ catalog: {
+ defaultModel: "test-model",
+ models: [
+ { contextWindowMaxTokens: 123456, thinkingOptions: expected.map((id) => ({ id })) },
+ ],
+ },
+ });
+ });
+}
+test("status accepts future credential states and drains its maintenance host", async () => {
+ const h = await harness("catalog-controls", { MUSE_TEST_ACCOUNT: "futureCredential" });
+ expect(await h.provider.status!({ launch: h.launch })).toEqual({ available: true });
+ expect(await h.recorded()).toContainEqual({ event: "hostClosed" });
+});
+
+for (const [tool, detail] of [
+ ["grep", "search"],
+ ["glob", "search"],
+ ["ls", "search"],
+ ["web_search", "search"],
+ ["web_fetch", "fetch"],
+ ["custom_tool", "unknown"],
+]) {
+ test(`${tool} tool calls use ${detail} detail`, async () => {
+ const h = await harness("tools-edit", { MUSE_TEST_TOOL: tool! });
+ await h.open();
+ await h.prompt();
+ await h.wait((event) => event.type === "session.turn" && event.state === "completed");
+ expect(h.events).toContainEqual(
+ expect.objectContaining({
+ type: "timeline.item",
+ item: expect.objectContaining({
+ name: tool,
+ status: "completed",
+ detail: expect.objectContaining({ type: detail }),
+ }),
+ }),
+ );
+ });
+}
+test("a future item kind uses fallbackText without breaking turn completion", async () => {
+ const h = await harness("tools-edit", { MUSE_TEST_UNKNOWN_KIND: "1" });
+ await h.open();
+ await h.prompt();
+ await h.wait((event) => event.type === "session.turn" && event.state === "completed");
+ expect(h.events).toContainEqual(
+ expect.objectContaining({
+ type: "timeline.item",
+ item: expect.objectContaining({
+ name: "futureItem",
+ detail: { type: "plain_text", label: "futureItem", text: "New MSP item" },
+ }),
+ }),
+ );
+});
+test("fingerprint mismatch is logged but does not prevent opening", async () => {
+ const h = await harness("text-reasoning", { MUSE_TEST_FINGERPRINT: "sha256:unverified" });
+ expect(await h.open()).toMatchObject({ type: "session.ready" });
+});
+for (const restoring of [false, true]) {
+ test(`MCP servers map to MSP stdio and streamableHttp on ${restoring ? "resume" : "start"}`, async () => {
+ const h = await harness(restoring ? "resume-with-cursor" : "text-reasoning");
+ await h.send({
+ type: "session.open",
+ sessionId: "paseo-session",
+ requestId: "mcp",
+ persistence: restoring
+ ? { version: 1, data: { sessionId: "saved-session", cursor: "v:old:7" } }
+ : undefined,
+ history: "replay",
+ config: {
+ cwd: h.root,
+ env: {},
+ persist: true,
+ settings: {},
+ mcpServers: {
+ stdio: {
+ type: "stdio",
+ command: "test-server",
+ args: ["--serve"],
+ env: { TEST_ENV: "yes" },
+ },
+ paseo: {
+ type: "http",
+ url: "http://localhost/mcp/agents",
+ headers: { Authorization: "Bearer test-token" },
+ },
+ },
+ },
+ });
+ await h.wait((event) => event.type === "session.ready");
+ expect(
+ (await h.recorded()).find(
+ (frame) => frame.method === (restoring ? "session/resume" : "session/start"),
+ ).params.config.mcpServers,
+ ).toEqual({
+ stdio: {
+ transport: "stdio",
+ command: "test-server",
+ args: ["--serve"],
+ env: { TEST_ENV: "yes" },
+ framing: "lineDelimitedJson",
+ },
+ paseo: {
+ transport: "streamableHttp",
+ url: "http://localhost/mcp/agents",
+ headers: { Authorization: "Bearer test-token" },
+ },
+ });
+ });
+}
+
+test("authRequired turn errors retain their kind and explain login recovery", async () => {
+ const h = await harness("text-reasoning", { MUSE_TEST_AUTH_REQUIRED: "1" });
+ await h.open();
+ await h.prompt();
+ expect(
+ await h.wait((event) => event.type === "session.turn" && event.state === "failed"),
+ ).toMatchObject({
+ error: { code: "authRequired", message: "Run `muse login` or set META_API_KEY." },
+ });
+});
+test("status bounds a stalled account read and closes the host", async () => {
+ const h = await harness("catalog-controls", { MUSE_TEST_HANG: "account/read" });
+ expect(await h.provider.status!({ launch: h.launch })).toEqual({
+ available: false,
+ diagnostic: "Muse account/read timed out",
+ });
+ expect(await h.recorded()).toContainEqual({ event: "hostClosed" });
+});
+
+test("interrupt targets the running turn when another prompt is queued", async () => {
+ const h = await harness("interrupt", { MUSE_TEST_QUEUE: "1" });
+ await h.open();
+ await h.prompt();
+ await h.wait((event) => event.type === "session.prompt_result");
+ const from = await h.prompt();
+ await h.wait((event) => event.type === "session.prompt_result", from);
+ await h.send({
+ type: "session.interrupt",
+ sessionId: "paseo-session",
+ requestId: "interrupt-queued",
+ });
+ await h.wait(
+ (event) => event.type === "request.completed" && event.requestId === "interrupt-queued",
+ );
+ const requests = await h.recorded();
+ const active = requests.find((frame) => frame.method === "turn/start");
+ expect(requests.find((frame) => frame.method === "turn/interrupt").params.turnId).toBe(
+ active.params.commandId,
+ );
+});
+
+for (const terminal of ["completed", "failed"]) {
+ test(`interrupt resolves when its targeted turn independently ends ${terminal}`, async () => {
+ const h = await harness("interrupt", { MUSE_TEST_INTERRUPT_TERMINAL: terminal });
+ await h.open();
+ await h.prompt();
+ await h.wait((event) => event.type === "session.prompt_result");
+ await h.send({
+ type: "session.interrupt",
+ sessionId: "paseo-session",
+ requestId: "racing-interrupt",
+ });
+ await h.wait((event) => event.type === "session.turn" && event.state === terminal);
+ await h.wait(
+ (event) => event.type === "request.completed" && event.requestId === "racing-interrupt",
+ );
+ expect(h.events.filter((event) => event.type === "request.failed")).toEqual([]);
+ });
+}
+for (const [behavior, choiceId] of [
+ ["allow", "allow_once"],
+ ["deny", "abort"],
+] as const) {
+ test(`CLI ${behavior} prefers the plain once choice over a broader fixture grant`, async () => {
+ const h = await harness("staged-approval", { MUSE_TEST_CHOICES: "reverse" });
+ await h.open();
+ await h.prompt();
+ const permission = await h.wait((event) => event.type === "session.permission");
+ if (permission.type !== "session.permission") throw new Error("Expected permission");
+ await h.send({
+ type: "session.permission",
+ sessionId: "paseo-session",
+ permissionId: permission.request.id,
+ response: { behavior },
+ });
+ await expect
+ .poll(
+ async () =>
+ (await h.recorded()).find((frame) => frame.method === "approval/decide")?.params.choiceId,
+ )
+ .toBe(choiceId);
+ });
+}
+
+test("CLI deny rejects a tool without aborting when denied/once is offered", async () => {
+ const h = await harness("staged-approval", { MUSE_TEST_DENIED: "1" });
+ await h.open();
+ await h.prompt();
+ const permission = await h.wait((event) => event.type === "session.permission");
+ if (permission.type !== "session.permission") throw new Error("Expected permission");
+ await h.send({
+ type: "session.permission",
+ sessionId: "paseo-session",
+ permissionId: permission.request.id,
+ response: { behavior: "deny" },
+ });
+ await expect
+ .poll(
+ async () =>
+ (await h.recorded()).find((frame) => frame.method === "approval/decide")?.params.choiceId,
+ )
+ .toBe("reject_once");
+});
+
+test("skills publish commands and command prompts submit structured skill parts", async () => {
+ const h = await harness("skill");
+ await h.open();
+ expect(await h.wait((e) => e.type === "session.commands")).toMatchObject({
+ commands: expect.arrayContaining([
+ expect.objectContaining({ name: "phase0", description: expect.any(String) }),
+ expect.objectContaining({ name: "compact", description: expect.any(String) }),
+ ]),
+ });
+ await h.send({
+ type: "session.prompt",
+ sessionId: "paseo-session",
+ prompt: {
+ clientMessageId: "skill-client",
+ delivery: "auto",
+ input: { type: "command", name: "phase0", arguments: "argument text" },
+ },
+ });
+ await h.wait((e) => e.type === "session.turn" && e.state === "completed");
+ expect((await h.recorded()).find((f) => f.method === "turn/start").params).toMatchObject({
+ input: expect.arrayContaining([
+ { type: "skill", selector: "phase0", arguments: "argument text" },
+ ]),
+ displayText: "/phase0 argument text",
+ });
+});
+
+test("skill changes refresh the session command catalog", async () => {
+ const h = await harness("skill", { MUSE_TEST_SKILLS_CHANGED: "1" });
+ await h.open();
+ const from = await h.prompt();
+ expect(await h.wait((e) => e.type === "session.commands", from)).toMatchObject({
+ commands: [{ name: "compact", description: "Compact conversation context" }],
+ });
+ expect((await h.recorded()).filter((f) => f.method === "skill/list")).toHaveLength(2);
+});
+for (const mode of ["answer", "cancel"] as const) {
+ test(`todo and question ${mode} replay through the provider interface`, async () => {
+ const h = await harness(mode === "answer" ? "phase3-controls" : "phase3-cancel");
+ await h.open();
+ await h.prompt();
+ if (mode === "answer")
+ expect(
+ await h.wait((e) => e.type === "timeline.item" && e.item.type === "todo"),
+ ).toMatchObject({
+ item: {
+ items: [
+ { text: "inspect f", completed: false, status: "in_progress" },
+ { text: "report", completed: false, status: "pending" },
+ ],
+ },
+ });
+ const permission = await h.wait(
+ (e) => e.type === "session.permission" && e.request.kind === "question",
+ );
+ if (permission.type !== "session.permission") throw new Error("Expected question");
+ expect(permission.request.input).toMatchObject({
+ questions: [
+ { header: "Color", options: [{ label: "Blue" }, { label: "Green" }], multiSelect: false },
+ ],
+ });
+ await h.send({
+ type: "session.permission",
+ sessionId: "paseo-session",
+ permissionId: permission.request.id,
+ response:
+ mode === "answer"
+ ? { behavior: "allow", updatedInput: { answers: { Color: "Blue" } } }
+ : { behavior: "deny", message: "QA cancellation" },
+ });
+ await h.wait(
+ (e) => e.type === "session.permission_resolved" && e.permissionId === permission.request.id,
+ );
+ const frame = (await h.recorded()).find(
+ (f) => f.method === (mode === "answer" ? "userInput/answer" : "userInput/cancel"),
+ );
+ expect(frame.params.userInputId).toBe(permission.request.id);
+ if (mode === "answer")
+ expect(frame.params.answers).toEqual([{ questionId: "color_choice", selectedLabel: "Blue" }]);
+ expect((await h.recorded()).some((f) => f.result && Object.keys(f.result).length === 0)).toBe(
+ true,
+ );
+ });
+}
+for (const variant of ["tool", "dedicated", "workflow"]) {
+ test(`${variant} subagent opens only the supplied child and pages its real transcript`, async () => {
+ const h = await harness("subagent", { MUSE_TEST_CHILD: variant });
+ await h.open();
+ await h.prompt();
+ expect(
+ await h.wait((e) => e.type === "session.opened" && e.sessionId === "fixture-child"),
+ ).toMatchObject({
+ parentSessionId: "paseo-session",
+ restoration: "parent",
+ toolCallId: expect.any(String),
+ });
+ expect(
+ await h.wait(
+ (e) =>
+ e.type === "timeline.item" &&
+ e.sessionId === "fixture-child" &&
+ e.item.type === "assistant_message",
+ ),
+ ).toMatchObject({ item: { text: "SUBAGENT_PHASE0_OK" } });
+ await h.wait((e) => e.type === "session.turn" && e.state === "completed");
+ expect(
+ h.events.filter((e) => e.type === "session.opened" && e.sessionId === "fixture-child"),
+ ).toHaveLength(1);
+ expect(
+ (await h.recorded())
+ .filter((f) => f.method === "session/read")
+ .map((f) => f.params.sessionId),
+ ).toEqual(["fixture-child"]);
+ expect(
+ h.events.filter(
+ (e) =>
+ e.type === "timeline.item" &&
+ e.sessionId === "fixture-child" &&
+ e.item.type === "assistant_message",
+ ),
+ ).toHaveLength(1);
+ });
+}
+test("gap backfill repairs a missing completion without duplicating item revisions", async () => {
+ const h = await harness("text-reasoning", { MUSE_TEST_GAP: "1" });
+ await h.open();
+ await h.prompt();
+ await h.wait((e) => e.type === "session.turn" && e.state === "completed");
+ const frames = (await h.recorded()).filter((f) => f.method === "view/page");
+ expect(frames.map((f) => f.params.cursor)).toEqual(["fixture-last-cursor"]);
+ const messages = h.events.filter(
+ (e) => e.type === "timeline.item" && e.item.type === "assistant_message",
+ );
+ expect(messages.at(-1)).toMatchObject({ item: { text: expect.stringContaining("49/20") } });
+ expect(h.events.filter((e) => e.type === "session.turn" && e.state === "completed")).toHaveLength(
+ 1,
+ );
+});
+test("silent active turns page after two minutes and stop polling on recovered terminal", async () => {
+ const h = await harness("text-reasoning", { MUSE_TEST_SILENT: "1" });
+ await h.open();
+ vi.useFakeTimers({ toFake: ["setTimeout", "clearTimeout"] });
+ await h.prompt();
+ await h.wait((e) => e.type === "session.prompt_result");
+ await vi.advanceTimersByTimeAsync(119999);
+ expect((await h.recorded()).filter((f) => f.method === "view/page")).toEqual([]);
+ await vi.advanceTimersByTimeAsync(1);
+ await h.wait((e) => e.type === "session.turn" && e.state === "completed");
+ await vi.advanceTimersByTimeAsync(240000);
+ expect((await h.recorded()).filter((f) => f.method === "view/page")).toHaveLength(1);
+});
+test("sandbox, network and workspace trust settings apply only on the next open", async () => {
+ const h = await harness();
+ await h.open();
+ h.setSettings({ sandbox: false, network: "enabled", trustWorkspace: true });
+ expect((await h.recorded()).filter((f) => f.event === "hostStarted").map((f) => f.args)).toEqual([
+ ["serve", "--sandbox-network", "proxy-only"],
+ ]);
+ await h.send({ type: "session.close", sessionId: "paseo-session", requestId: "close-settings" });
+ await h.wait((e) => e.type === "session.closed");
+ const from = h.events.length;
+ await h.open();
+ await h.wait((e) => e.type === "session.ready", from);
+ expect((await h.recorded()).filter((f) => f.event === "hostStarted").map((f) => f.args)).toEqual([
+ ["serve", "--sandbox-network", "proxy-only"],
+ ["serve", "--sandbox-network", "enabled", "--disable-sandbox", "--trust-workspace"],
+ ]);
+});
+test("sessions list filters workspace and imported persistence opens via resume", async () => {
+ const h = await harness("resume-without-cursor");
+ await h.send({
+ type: "sessions",
+ requestId: "import-list",
+ cwd: "/tmp/muse-phase0/repo",
+ limit: 2,
+ });
+ const listed = await h.wait((e) => e.type === "sessions");
+ if (listed.type !== "sessions") throw new Error("Expected sessions");
+ expect(listed.sessions).toHaveLength(2);
+ expect((await h.recorded()).find((f) => f.method === "session/list").params.workspaceRoot).toBe(
+ "/tmp/muse-phase0/repo",
+ );
+ await h.open(listed.sessions[0]!.persistence);
+ expect((await h.recorded()).filter((f) => f.method === "session/start")).toEqual([]);
+ expect((await h.recorded()).find((f) => f.method === "session/resume").params.sessionId).toBe(
+ listed.sessions[0]!.persistence.data.sessionId,
+ );
+});
+for (const fixture of ["phase3-compact", "phase3-compact-history", "phase3-compact-limit"]) {
+ test(`${fixture} routes compact and exposes the recorded outcome`, async () => {
+ const h = await harness(fixture);
+ const rows = (
+ await readFile(
+ fileURLToPath(new URL(`./fixtures/${fixture}.ndjson`, import.meta.url)),
+ "utf8",
+ )
+ )
+ .trim()
+ .split("\n")
+ .map((line) => JSON.parse(line));
+ const nativeId = rows.find((row) => row.msg.method === "session/resume").msg.params.sessionId;
+ await h.open({ version: 1, data: { sessionId: nativeId } });
+ await h.send({
+ type: "session.prompt",
+ sessionId: "paseo-session",
+ prompt: {
+ clientMessageId: "compact",
+ delivery: "auto",
+ input: { type: "command", name: "compact", arguments: "" },
+ },
+ });
+ if (fixture === "phase3-compact-limit") {
+ expect(await h.wait((e) => e.type === "session.prompt_result")).toMatchObject({
+ result: { type: "completed" },
+ });
+ expect(
+ await h.wait(
+ (e) =>
+ e.type === "timeline.item" &&
+ e.item.type === "compaction" &&
+ e.item.status === "completed",
+ ),
+ ).toMatchObject({ item: { preTokens: 22192 } });
+ } else
+ expect(await h.wait((e) => e.type === "session.prompt_result")).toMatchObject({
+ result: {
+ type: "failed",
+ error: {
+ code: "commandRejected",
+ message: expect.stringContaining("context_compaction.provider_context_limit_tokens"),
+ },
+ },
+ });
+ expect((await h.recorded()).filter((f) => f.method === "turn/start")).toEqual([]);
+ });
+}
+for (const usage of [
+ {},
+ {
+ usage: {
+ observedAtMs: 1700000000000,
+ tier: "Pro",
+ window: { usedPercent: 75, resetsAtMs: 1700018000000, windowDurationMins: 300 },
+ weekly: { usedPercent: 105, resetsAtMs: 1700604800000 },
+ },
+ },
+]) {
+ test(`usage source presents ${"usage" in usage ? "subscription windows" : "real route absence"} from discovered accounts`, async () => {
+ const h = await harness("catalog-controls", { MUSE_TEST_USAGE: JSON.stringify(usage) });
+ await h.open();
+ const inputs = await h.usageSource.discover();
+ expect(inputs).toHaveLength(1);
+ const input = inputs[0];
+ expect(await h.usageSource.identify(input)).toEqual({
+ key: (input as { account: string }).account,
+ label: "Muse Code",
+ });
+ const report = await h.usageSource.fetch(input);
+ if ("usage" in usage)
+ expect(report).toMatchObject({
+ status: "available",
+ planLabel: "Pro",
+ windows: [
+ {
+ id: "five_hour",
+ label: "5 hours",
+ usedPct: 75,
+ remainingPct: 25,
+ tone: "warning",
+ },
+ { id: "weekly", usedPct: 105, remainingPct: 0, tone: "danger" },
+ ],
+ });
+ else expect(report).toEqual({ status: "unavailable", windows: [], balances: [], details: [] });
+ expect((await h.recorded()).filter((f) => f.method === "usage/read")).toHaveLength(1);
+ });
+}
+
+test("a terminal before turn admission does not start an idle watchdog", async () => {
+ const h = await harness("text-reasoning", { MUSE_TEST_ACK_LAST: "1" });
+ await h.open();
+ vi.useFakeTimers({ toFake: ["setTimeout", "clearTimeout"] });
+ await h.prompt();
+ await h.wait((e) => e.type === "session.prompt_result");
+ await h.wait((e) => e.type === "session.turn" && e.state === "completed");
+ await vi.advanceTimersByTimeAsync(120000);
+ await delay(30);
+ expect((await h.recorded()).filter((f) => f.method === "view/page")).toEqual([]);
+});
+test("admitted compact publishes compaction progress and completes the command without a turn", async () => {
+ const h = await harness("text-reasoning", { MUSE_TEST_COMPACT: "1" });
+ await h.open();
+ await h.send({
+ type: "session.prompt",
+ sessionId: "paseo-session",
+ prompt: {
+ clientMessageId: "compact-admitted",
+ delivery: "auto",
+ input: { type: "command", name: "compact", arguments: "" },
+ },
+ });
+ expect(await h.wait((e) => e.type === "session.prompt_result")).toMatchObject({
+ result: { type: "completed" },
+ });
+ await h.wait(
+ (e) =>
+ e.type === "timeline.item" && e.item.type === "compaction" && e.item.status === "completed",
+ );
+ expect(
+ h.events
+ .filter((e) => e.type === "timeline.item" && e.item.type === "compaction")
+ .map((e) => e.type === "timeline.item" && e.item),
+ ).toEqual([
+ { type: "compaction", id: "fixture-compaction", status: "loading" },
+ { type: "compaction", id: "fixture-compaction", status: "completed" },
+ ]);
+ expect((await h.recorded()).filter((f) => f.method === "turn/start")).toEqual([]);
+});
+
+test("default workflow children render structured tool details from the real no-flag run", async () => {
+ const h = await harness("text-reasoning", { MUSE_TEST_WORKFLOW: "1" });
+ await h.open();
+ await h.prompt();
+ const event = await h.wait(
+ (e) =>
+ e.type === "timeline.item" &&
+ e.item.type === "tool_call" &&
+ e.item.name === "workflow" &&
+ e.item.detail.type === "sub_agent" &&
+ e.item.detail.log?.includes("MUSE_PARITY_CHILD_OK") === true,
+ );
+ expect(event).toMatchObject({ item: { status: "completed", detail: { type: "sub_agent" } } });
+ expect(h.events.filter((e) => e.type === "session.opened")).toHaveLength(1);
+ const workflows = h.events.filter(
+ (e) => e.type === "timeline.item" && e.item.type === "tool_call" && e.item.name === "workflow",
+ );
+ expect(workflows.length).toBeGreaterThan(1);
+ for (const workflow of workflows)
+ expect(workflow).toMatchObject({ item: { detail: { type: "sub_agent" } } });
+});
+
+for (const source of ["user", "project"] as const) {
+ test(`real ${source} skill catalog and command replay with explicit workspace trust`, async () => {
+ const h = await harness(`phase3-${source}-skill`);
+ h.setSettings({ trustWorkspace: source === "project" });
+ await h.open();
+ expect(await h.wait((e) => e.type === "session.commands")).toMatchObject({
+ commands: expect.arrayContaining([
+ expect.objectContaining({ name: `muse-parity-${source}` }),
+ ]),
+ });
+ await h.send({
+ type: "session.prompt",
+ sessionId: "paseo-session",
+ prompt: {
+ clientMessageId: "real-skill",
+ delivery: "auto",
+ input: { type: "command", name: `muse-parity-${source}`, arguments: "QA" },
+ },
+ });
+ await h.wait((e) => e.type === "session.turn" && e.state === "completed");
+ expect(h.events).toEqual(
+ expect.arrayContaining([
+ expect.objectContaining({
+ type: "timeline.item",
+ item: expect.objectContaining({
+ type: "assistant_message",
+ text: `MUSE_PARITY_${source.toUpperCase()}_OK`,
+ }),
+ }),
+ ]),
+ );
+ const recorded = await h.recorded();
+ expect(recorded.find((f) => f.method === "turn/start").params.input).toContainEqual({
+ type: "skill",
+ selector: `muse-parity-${source}`,
+ arguments: "QA",
+ });
+ expect(recorded.find((f) => f.event === "hostStarted").args.includes("--trust-workspace")).toBe(
+ source === "project",
+ );
+ });
+}
+
+test("usage identity follows the resolved config directory across credential and route changes", async () => {
+ const identities: string[] = [];
+ for (const [config, token, route] of [
+ ["/usage/config", "token-a", "route-a"],
+ ["/usage/config", "token-b", "route-b"],
+ ["/usage/other", "token-b", "route-b"],
+ ]) {
+ const h = await harness("catalog-controls", {
+ XDG_CONFIG_HOME: config!,
+ META_API_KEY: token!,
+ META_BASE_URL: route!,
+ });
+ await h.open();
+ const inputs = await h.usageSource.discover();
+ expect(inputs).toHaveLength(1);
+ const identity = await h.usageSource.identify(inputs[0]);
+ expect(identity).not.toBeNull();
+ identities.push(identity!.key);
+ }
+ expect(identities[0]).toBe(identities[1]);
+ expect(identities[2]).not.toBe(identities[0]);
+});
diff --git a/plugins/tsconfig.json b/plugins/tsconfig.json
index 5066af976b..83e35ddb4b 100644
--- a/plugins/tsconfig.json
+++ b/plugins/tsconfig.json
@@ -7,7 +7,8 @@
"lib": ["ES2023", "DOM"],
"types": ["node", "vitest/globals"],
"incremental": false,
- "noEmit": true
+ "noEmit": true,
+ "jsx": "react-jsx"
},
"include": ["**/*.ts", "**/*.tsx"],
"exclude": ["node_modules", "**/*.test.ts"]
diff --git a/public-docs/custom-providers.md b/public-docs/custom-providers.md
index 1c89d8d2a6..b325492768 100644
--- a/public-docs/custom-providers.md
+++ b/public-docs/custom-providers.md
@@ -18,7 +18,9 @@ Everything beyond the [supported providers](/docs/supported-providers) lives und
Run `paseo reload` after editing the file. Provider changes apply to future launches without restarting the daemon.
-Provider IDs must be lowercase alphanumeric with hyphens (`/^[a-z][a-z0-9-]*$/`). Every custom entry needs `extends` (a first-class provider ID or `"acp"`) and a `label`.
+Provider IDs must be lowercase alphanumeric with hyphens (`/^[a-z][a-z0-9-]*$/`). A new custom provider needs `extends` (a first-class provider ID or `"acp"`) and a `label`.
+To override a bundled provider plugin, use its provider ID and omit `extends`. For
+[Muse Code](/docs/muse-code), set command or environment overrides under `agents.providers.muse`.
The examples below are a quick tour. The full, up-to-date reference is on GitHub: [docs/custom-providers.md](https://github.com/getpaseo/paseo/blob/main/docs/custom-providers.md).
diff --git a/public-docs/docker.md b/public-docs/docker.md
index f6324a09f2..6f19da692a 100644
--- a/public-docs/docker.md
+++ b/public-docs/docker.md
@@ -39,7 +39,7 @@ The image:
- stores daemon state under `/home/paseo/.paseo`
- runs the daemon and launched agents as the non-root `paseo` user
-The image does not bundle agent CLIs such as Claude Code, Codex, OpenCode, Copilot, or Pi. Add the agents you use with a small child image.
+The image does not bundle agent CLIs such as Claude Code, Codex, OpenCode, Copilot, Pi, or Muse Code. Add the agents you use with a small child image.
Host-side CLI commands select the container explicitly, for example `paseo project ls --host 127.0.0.1:6767`. Without an endpoint selector the CLI looks for a local home’s supervisor. Container environment settings are deployment overrides; worker restart preserves them. Your container manager owns full supervisor replacement.
diff --git a/public-docs/muse-code.md b/public-docs/muse-code.md
new file mode 100644
index 0000000000..99c3096755
--- /dev/null
+++ b/public-docs/muse-code.md
@@ -0,0 +1,58 @@
+---
+title: Muse Code
+description: Install and configure Muse Code for Paseo.
+nav: Muse Code
+order: 25
+category: Providers
+---
+
+# Muse Code
+
+Run Meta's terminal coding agent in Paseo with your existing Muse installation and credentials.
+
+## Getting started
+
+Install Muse Code on the machine running the Paseo daemon:
+
+```bash
+curl -fsSL https://dev.meta.ai/install.sh | sh
+muse login
+```
+
+Use Muse 1.3.0 or newer. This integration was verified with 1.4.1. For API access, set
+`META_API_KEY` in the daemon's environment instead of logging in. See
+[provider environment overrides](/docs/custom-providers).
+
+In Paseo, select **Muse Code**, then choose a model, approval mode, and reasoning effort.
+Paseo runs `muse serve` and communicates over the Muse Session Protocol (MSP). Your Muse
+configuration determines the available models.
+
+## Plugin settings
+
+Open Command Center and select **Configure Muse Code**. Changes apply when an agent's
+Muse host next opens, including a refresh of an existing agent.
+
+| Setting | Default | Effect |
+| --------------- | ------------ | ----------------------------------------------------------------------------------------------- |
+| Sandbox | On | Keeps Muse's filesystem and network sandbox enabled. Turning it off allows full network access. |
+| Network | `proxy-only` | Muse's sandbox network policy: `proxy-only`, `restricted`, or `enabled`. |
+| Trust workspace | Off | Lets Muse load project-scoped skills and configuration. |
+
+Approval modes control tool decisions separately: **Default**, **Ask**, **Strict**, and
+**Full access**. Full access automatically allows escalated approval stages; it keeps the
+sandbox setting you chose. Skills appear in the slash-command menu, alongside `/compact`.
+
+## Limitations in Muse 1.4.1
+
+- **Paseo MCP tools are unavailable.** Muse drops the returned tool namespace before matching
+ an MCP call. This upstream issue must be fixed in Muse before its agents can use Paseo tools.
+- **Compaction needs a model context limit.** If your endpoint does not report one, configure
+ `context_compaction.provider_context_limit_tokens` in Muse for the selected model.
+- **Usage windows appear only when Muse reports them.** An empty `usage/read` response
+ leaves subscription usage unavailable.
+- **Native subagents may need Muse's experimental SDK flag.** Set
+ `MUSE_EXPERIMENTAL_SDK_ENABLED=on` in the provider environment if native subagent tools
+ are missing. Linked child sessions appear only when Muse supplies `childSessionId`.
+
+See [custom providers](/docs/custom-providers) to override the binary or environment under
+`agents.providers.muse`.
diff --git a/public-docs/providers.md b/public-docs/providers.md
index ea7f09e36e..6de304a019 100644
--- a/public-docs/providers.md
+++ b/public-docs/providers.md
@@ -8,7 +8,7 @@ category: Providers
# Providers
-Paseo doesn't ship its own coding agent. It launches and supervises **existing CLIs you've already installed and authenticated**, Claude Code, Codex, OpenCode, Cursor, Gemini, and the rest. Your subscriptions, your config, your skills, your MCP servers all stay intact. Paseo just gives you a UI, a CLI, a relay, and orchestration on top.
+Paseo doesn't ship its own coding agent. It launches and supervises **existing CLIs you've already installed and authenticated**, Claude Code, Codex, OpenCode, Antigravity, Muse Code, Cursor, Gemini, and the rest. Your subscriptions, your config, your skills, your MCP servers all stay intact. Paseo just gives you a UI, a CLI, a relay, and orchestration on top.
## Mental model
@@ -16,7 +16,7 @@ A provider is the contract between Paseo and one external agent CLI: how to laun
## Two tiers
-- **Native support**, Paseo ships a bundled adapter for the major agents (Claude Code, Codex, OpenCode, pi). Auto-discovered when the underlying CLI is installed, with mode metadata and voice support where applicable.
+- **Native support**, Paseo ships a bundled adapter for the major agents (Claude Code, Codex, OpenCode, Pi, [Antigravity](/docs/supported-providers#antigravity), [Muse Code](/docs/muse-code)). Auto-discovered when the underlying CLI is installed, with mode metadata and voice support where applicable.
- **ACP catalog**, any agent speaking the [Agent Client Protocol](https://agentclientprotocol.com) is supported through a generic adapter. Paseo ships a curated catalog of one-click installs (Cursor, Gemini, GitHub Copilot, Hermes, Kimi, Qwen Code, and 25+ more), and you can add any other ACP agent yourself.
Either way, **you install the underlying CLI**. Paseo runs it.
diff --git a/public-docs/security.md b/public-docs/security.md
index 982b956829..a935a75878 100644
--- a/public-docs/security.md
+++ b/public-docs/security.md
@@ -123,7 +123,7 @@ See [Docker](/docs/docker) for Compose and reverse proxy examples.
## Agent authentication
-Paseo wraps agent CLIs (Claude Code, Codex, OpenCode) but does not manage their authentication. Each agent provider handles its own credentials:
+Paseo wraps agent CLIs (Claude Code, Codex, OpenCode, Muse Code) but does not manage their authentication. Each agent provider handles its own credentials:
- **Claude Code**, authenticates via Anthropic's OAuth flow, stored in `~/.claude/`
- **Codex**, uses your OpenAI API key or OAuth session
diff --git a/public-docs/supported-providers.md b/public-docs/supported-providers.md
index 588fd96195..aaed86f5c4 100644
--- a/public-docs/supported-providers.md
+++ b/public-docs/supported-providers.md
@@ -19,6 +19,7 @@ Work out of the box once the underlying CLI is installed and authenticated.
- [OpenCode](https://opencode.ai/). Open-source coding assistant with multi-provider model support.
- [Pi](https://pi.dev). Minimal terminal-based coding agent with multi-provider LLM support.
- [Antigravity](#antigravity). Uses your installed `agy` CLI through a built-in provider plugin.
+- [Muse Code](/docs/muse-code). Meta's terminal coding agent, bundled as a provider plugin.
### Antigravity
diff --git a/scripts/builtin-plugins-dist.test.mjs b/scripts/builtin-plugins-dist.test.mjs
index 7ec6ba55ee..acaa684a44 100644
--- a/scripts/builtin-plugins-dist.test.mjs
+++ b/scripts/builtin-plugins-dist.test.mjs
@@ -1,6 +1,7 @@
import assert from "node:assert/strict";
-import { readFile, stat } from "node:fs/promises";
+import { mkdtemp, readFile, rm, stat } from "node:fs/promises";
import path from "node:path";
+import os from "node:os";
import test from "node:test";
import { fileURLToPath } from "node:url";
import pino from "pino";
@@ -28,7 +29,8 @@ test("built output compiles and starts every listed built-in", async () => {
const { version } = JSON.parse(
await readFile(path.join(repoRoot, "packages/server/package.json"), "utf8"),
);
- const runtime = new PluginRuntime(pino({ level: "silent" }), version);
+ const settingsDirectory = await mkdtemp(path.join(os.tmpdir(), "builtin-dist-settings-"));
+ const runtime = new PluginRuntime(pino({ level: "silent" }), version, { settingsDirectory });
runtime.bindPaseoSessionHost({
async attachPluginSocket(_pluginId, socket) {
const closed = new Promise((resolve) => socket.once("close", resolve));
@@ -76,5 +78,6 @@ test("built output compiles and starts every listed built-in", async () => {
}
} finally {
await runtime.stopAll();
+ await rm(settingsDirectory, { recursive: true, force: true });
}
});
@@ -42,7 +42,7 @@
Run agents in parallel on your own machines. Ship from your phone or your desk.
- **Self-hosted:** Agents run on your machine with your full dev environment. Use your tools, your configs, and your skills.
-- **Multi-provider:** Claude Code, Codex, Copilot, OpenCode, and Pi through the same interface. Pick the right model for each job.
+- **Multi-provider:** Claude Code, Codex, Copilot, OpenCode, Pi, Antigravity, and Muse Code through the same interface. Pick the right model for each job.
- **Voice control:** Dictate tasks or talk through problems in voice mode. Hands-free when you need it.
- **Cross-device:** iOS, Android, desktop, web, and CLI. Start work at your desk, check in from your phone, script it from the terminal.
- **Privacy-first:** Paseo doesn't have any telemetry, tracking, or forced log-ins.
@@ -68,6 +68,8 @@ You need at least one agent CLI installed and configured with your credentials:
- [GitHub Copilot](https://github.com/features/copilot/cli/)
- [OpenCode](https://github.com/anomalyco/opencode)
- [Pi](https://pi.dev)
+- [Antigravity](https://paseo.sh/docs/supported-providers#antigravity)
+- [Muse Code](https://paseo.sh/docs/muse-code)
### Desktop app (recommended)
diff --git a/docs/plugins.md b/docs/plugins.md
index f3c0572689..a354a20374 100644
--- a/docs/plugins.md
+++ b/docs/plugins.md
@@ -88,12 +88,23 @@ never deletes it. The global `pluginsEnabled` switch remains available.
## Built-in plugins
-Built-in plugins live in `plugins/