Merge remote-tracking branch 'origin/main' into bot/diagnose-8309-7be72288

docs/android.md

@@ -61,6 +61,18 @@ Gradle auto-fetches the platform/build-tools it needs once licenses are accepted
 
 ## Local build + install
 
+The `react-native-svg@15.15.4` patch prevents header fades retaining their old painted size after
+rotation. Rebuild native Android after changing it; Metro reloads cannot update this code. Keep the
+resize hunks until upstream invalidates descendant geometry on canvas resize. Its instrumentation
+regression renders real gradient pixels across growing and shrinking layouts, including a nested
+group. From `packages/app/android`, run it on your selected emulator:
+
+```bash
+ANDROID_SERIAL=emulator-5562 ./gradlew :react-native-svg:connectedDebugAndroidTest \
+  -Pandroid.testInstrumentationRunnerArguments.class=com.horcrux.svg.SvgResizeTest \
+  --no-daemon --max-workers=2 -Dorg.gradle.parallel=false
+```
+
 The locked `expo-modules-core@57.0.23` needs the patch installed by `npm install`.
 It backports
 [Expo's Activity-result launcher fix](https://github.com/expo/expo/pull/49634): changing

packages/app/e2e/browser/assistant-file-link-tooltip.spec.ts

@@ -1,4 +1,5 @@
-import { writeFile } from "node:fs/promises";
+import { execFileSync } from "node:child_process";
+import { mkdir, writeFile } from "node:fs/promises";
 import path from "node:path";
 import { test, expect, type Page } from "../support/fixtures";
 import { openAgentRoute, seedMockAgentWorkspace } from "../support/helpers/mock-agent";
@@ -67,3 +68,54 @@ test("opening an assistant file link dismisses its tooltip over the file tab", a
     await agent.cleanup();
   }
 });
+
+async function readLinkedGuide(page: Page, linkName: string, content: string): Promise<void> {
+  await page.getByRole("link", { name: linkName, exact: true }).click();
+  await expect(page.getByTestId("markdown-preview-frame").filter({ visible: true })).toContainText(
+    content,
+  );
+}
+
+async function returnToNestedLinks(page: Page): Promise<void> {
+  await page.getByRole("button", { name: "Nested file links", exact: true }).click();
+  await expect(page.getByRole("link", { name: "nested guide", exact: true })).toBeVisible();
+}
+
+test("assistant directory paths find nested files and preserve exact workspace paths", async ({
+  page,
+}, testInfo) => {
+  testInfo.setTimeout(120_000);
+  const agent = await seedMockAgentWorkspace({
+    repoPrefix: "nested-file-link-",
+    title: "Nested file links",
+    featureValues: {
+      mockStreamingAssistantResponse:
+        "Read [nested guide](schema/x.md), [exact guide](schema/exact.md), and [missing guide](schema/missing.md).",
+      mockStreamingAssistantIntervalMs: 5,
+    },
+  });
+  try {
+    await mkdir(path.join(agent.cwd, "repo-a/schema"), { recursive: true });
+    execFileSync("git", ["init", "-b", "main"], { cwd: path.join(agent.cwd, "repo-a") });
+    await writeFile(
+      path.join(agent.cwd, "repo-a/schema/x.md"),
+      "# Nested file content\n\nDetails\n",
+    );
+    await mkdir(path.join(agent.cwd, "schema"), { recursive: true });
+    await writeFile(path.join(agent.cwd, "schema/exact.md"), "# Exact file content\n");
+    await writeFile(path.join(agent.cwd, "repo-a/schema/exact.md"), "# Wrong nested content\n");
+    await openAgentRoute(page, agent);
+    await agent.client.sendAgentMessage(agent.agentId, "Show the file links.");
+    await agent.client.waitForFinish(agent.agentId, 30_000);
+
+    await expect(page.getByRole("textbox", { name: "Message agent..." }).first()).toBeEnabled();
+    await readLinkedGuide(page, "nested guide", "Nested file content");
+    await returnToNestedLinks(page);
+    await readLinkedGuide(page, "exact guide", "Exact file content");
+    await returnToNestedLinks(page);
+    await page.getByRole("link", { name: "missing guide", exact: true }).click();
+    await expect(page.getByText("File not found", { exact: true })).toBeVisible();
+  } finally {
+    await agent.cleanup();
+  }
+});

packages/app/e2e/browser/folder-links.spec.ts

@@ -81,6 +81,8 @@ for (const folder of [
   "docs/guides",
   "docs/guides/",
   "docs/指南",
+  "examples/next.js/",
+  "examples/next.js",
 ]) {
   test(`chat folder link opens folder contents: ${folder}`, async ({ page }) => {
     const session = await seedMockAgentWorkspace({
@@ -92,6 +94,9 @@ for (const folder of [
     try {
       await mkdir(path.join(session.cwd, folder), { recursive: true });
       await writeFile(path.join(session.cwd, folder, "guide.md"), "# Folder link destination\n");
+      const competingFile = path.join(session.cwd, "repo-a", folder.replace(/\/$/, ""));
+      await mkdir(path.dirname(competingFile), { recursive: true });
+      await writeFile(competingFile, "This is a file, not the requested folder.\n");
       await session.client.waitForFinish(session.agentId, 30_000);
       await page.addInitScript(() => {
         localStorage.setItem(

packages/app/src/agent-stream/view.tsx

@@ -468,6 +468,7 @@ const AgentStreamViewComponent = forwardRef<AgentStreamViewHandle, AgentStreamVi
       () =>
         createInlinePathOpener({
           workspaceRoot,
+          resolveRelativeFiles: true,
           client,
           openFile: openInlineFile,
           openDirectory: openInlineDirectory,

packages/app/src/assistant-file-links/path-open.test.ts

@@ -64,7 +64,10 @@ it("ignores an older probe after a newer file link opens", async () => {
   const opened: string[] = [];
   const opener = createInlinePathOpener({
     workspaceRoot: "/repo",
-    client: { listDirectory: () => pendingProbe },
+    client: {
+      listDirectory: () => pendingProbe,
+      getDirectorySuggestions: async () => ({ entries: [], error: null }),
+    },
     openFile: (location) => {
       opened.push(location.path);
     },
@@ -91,7 +94,10 @@ it("ignores a pending probe when its view is left", async () => {
   const opened: string[] = [];
   const opener = createInlinePathOpener({
     workspaceRoot: "/repo",
-    client: { listDirectory: () => pendingProbe },
+    client: {
+      listDirectory: () => pendingProbe,
+      getDirectorySuggestions: async () => ({ entries: [], error: null }),
+    },
     openFile: (location) => {
       opened.push(location.path);
     },
@@ -130,3 +136,45 @@ it("sends folders outside the workspace away from the workspace Files panel", as
   expect(outsideFolders).toEqual(["~/Downloads/contracts", "/tmp/reports"]);
   expect(workspaceFolders).toEqual(["docs"]);
 });
+
+it("keeps a later selection when an earlier nested-file lookup finishes last", async () => {
+  const { createInlinePathOpener } = await import("./path-open");
+  const lookup = Promise.withResolvers<{
+    entries: Array<{ path: string; kind: "file" }>;
+    error: null;
+  }>();
+  const queries: string[] = [];
+  const opened: string[] = [];
+  const opener = createInlinePathOpener({
+    workspaceRoot: "/repo",
+    resolveRelativeFiles: true,
+    client: {
+      listDirectory: async () => {
+        throw new Error("Not a directory");
+      },
+      getDirectorySuggestions: async ({ query }: { query: string }) => {
+        queries.push(query);
+        return lookup.promise;
+      },
+    },
+    openFile: (location) => {
+      opened.push(location.path);
+    },
+    openDirectory: (directory) => {
+      opened.push(directory);
+    },
+    openOutsideDirectory: (directory) => {
+      opened.push(directory);
+    },
+  });
+  const earlier = opener.open(
+    { raw: "schema/x.md:2", path: "/repo/schema/x.md", lineStart: 2 },
+    "side",
+  );
+  await Promise.resolve();
+  expect(queries).toEqual(["schema/x.md"]);
+  await opener.open({ raw: "./guide.md:2", path: "/repo/guide.md", lineStart: 2 }, "side");
+  lookup.resolve({ entries: [{ path: "repo-a/schema/x.md", kind: "file" }], error: null });
+  await earlier;
+  expect(opened).toEqual(["guide.md"]);
+});

packages/app/src/assistant-file-links/path-open.ts

@@ -5,6 +5,7 @@ import {
   type OpenFileDisposition,
 } from "@/workspace/file-open";
 import { isAbsolutePath } from "@/utils/path";
+import { resolveMissingNestedRelativeFile, type GetDirectorySuggestions } from "./resolver";
 
 interface PathOpenInput {
   file?: string;
@@ -50,7 +51,11 @@ export async function resolveInlinePathOpen(input: PathOpenInput): Promise<PathO
 
 export function createInlinePathOpener(input: {
   workspaceRoot: string;
-  client: PathOpenInput["client"];
+  client: {
+    listDirectory(root: string, path: string): Promise<unknown>;
+    getDirectorySuggestions: GetDirectorySuggestions;
+  } | null;
+  resolveRelativeFiles?: boolean;
   openFile: (location: WorkspaceFileLocation, disposition: OpenFileDisposition) => void;
   openDirectory: (path: string) => void;
   openOutsideDirectory: (path: string) => void;
@@ -73,10 +78,21 @@ export function createInlinePathOpener(input: {
       } else if (destination.kind === "outsideDirectory") {
         input.openOutsideDirectory(destination.directoryPath);
       } else if (normalized.file) {
+        const resolvedTarget =
+          input.resolveRelativeFiles && input.client
+            ? await resolveMissingNestedRelativeFile({
+                target,
+                workspaceRoot: input.workspaceRoot,
+                getDirectorySuggestions: input.client.getDirectorySuggestions.bind(input.client),
+              })
+            : target;
+        if (ownGeneration !== generation) return;
+        const resolved = normalizeInlinePathTarget(resolvedTarget.path, input.workspaceRoot);
+        if (!resolved?.file) return;
         const location = normalizeWorkspaceFileLocation({
-          path: normalized.file,
-          lineStart: target.lineStart,
-          lineEnd: target.lineEnd,
+          path: resolved.file,
+          lineStart: resolvedTarget.lineStart,
+          lineEnd: resolvedTarget.lineEnd,
         });
         if (location) input.openFile(location, disposition);
       }

packages/app/src/assistant-file-links/resolver.test.ts

@@ -7,6 +7,7 @@ import {
   classifyForResolution,
   fetchDaemonResolution,
   getAssistantFileLinkToken,
+  resolveMissingNestedRelativeFile,
   UnresolvedFileLinkError,
   type AssistantFileLinkContext,
   type DirectorySuggestionEntry,
@@ -424,6 +425,174 @@ describe("fetchDaemonResolution", () => {
   });
 });
 
+describe("resolveMissingNestedRelativeFile", () => {
+  const target = {
+    raw: "schema/x.md:12-14",
+    path: "/Users/test/project/schema/x.md",
+    lineStart: 12,
+    lineEnd: 14,
+  };
+
+  it("opens a nested-repo suffix when the workspace-root path is missing", async () => {
+    const { getDirectorySuggestions, searches } = suggestionsFromMap({
+      "schema/x.md": [{ path: "repo-a/schema/x.md", kind: "file" }],
+    });
+
+    const result = await resolveMissingNestedRelativeFile({
+      target,
+      workspaceRoot: "/Users/test/project",
+      getDirectorySuggestions,
+    });
+
+    expect(searches).toEqual([
+      {
+        query: "schema/x.md",
+        cwd: "/Users/test/project",
+        matchMode: "suffix",
+        limit: 1,
+      },
+    ]);
+    expect(result).toEqual({
+      ...target,
+      path: "/Users/test/project/repo-a/schema/x.md",
+    });
+  });
+
+  it("keeps the exact workspace path when suggestions return that relative path", async () => {
+    const { getDirectorySuggestions } = suggestionsFromMap({
+      "schema/x.md": [{ path: "schema/x.md", kind: "file" }],
+    });
+
+    const result = await resolveMissingNestedRelativeFile({
+      target,
+      workspaceRoot: "/Users/test/project",
+      getDirectorySuggestions,
+    });
+
+    expect(result).toEqual(target);
+  });
+
+  it("keeps the original target when suggestions are empty", async () => {
+    const { getDirectorySuggestions } = suggestionsFromMap({});
+
+    await expect(
+      resolveMissingNestedRelativeFile({
+        target,
+        workspaceRoot: "/Users/test/project",
+        getDirectorySuggestions,
+      }),
+    ).resolves.toEqual(target);
+  });
+
+  it("keeps the original target when the daemon throws", async () => {
+    await expect(
+      resolveMissingNestedRelativeFile({
+        target,
+        workspaceRoot: "/Users/test/project",
+        getDirectorySuggestions: unavailableSuggestions,
+      }),
+    ).resolves.toEqual(target);
+  });
+
+  it.each([
+    ["a bare filename", { ...target, path: "/Users/test/project/file.ts" }],
+    ["a path outside the workspace", { ...target, path: "/tmp/schema/x.md" }],
+    ["a home-relative path", { ...target, path: "~/schema/x.md" }],
+  ])("does not search %s", async (_label, candidate) => {
+    const { getDirectorySuggestions, searches } = suggestionsFromMap({
+      "schema/x.md": [{ path: "repo-a/schema/x.md", kind: "file" }],
+    });
+
+    const result = await resolveMissingNestedRelativeFile({
+      target: candidate,
+      workspaceRoot: "/Users/test/project",
+      getDirectorySuggestions,
+    });
+
+    expect(searches).toEqual([]);
+    expect(result).toEqual(candidate);
+  });
+
+  it("does not search when the workspace root is blank", async () => {
+    const { getDirectorySuggestions, searches } = suggestionsFromMap({});
+
+    const result = await resolveMissingNestedRelativeFile({
+      target,
+      workspaceRoot: "   ",
+      getDirectorySuggestions,
+    });
+
+    expect(searches).toEqual([]);
+    expect(result).toEqual(target);
+  });
+
+  it.each([
+    ["/Users/test/project/schema/x.md", "/Users/test/project"],
+    ["file:///Users/test/project/schema/x.md", "/Users/test/project"],
+    ["C:/repo/schema/x.md", "C:/repo"],
+    ["\\\\server\\share\\schema\\x.md", "//server/share"],
+  ])("keeps absolute destination %s", async (raw, workspaceRoot) => {
+    const { getDirectorySuggestions, searches } = suggestionsFromMap({
+      "schema/x.md": [{ path: "repo-a/schema/x.md", kind: "file" }],
+    });
+    const absoluteTarget = { raw, path: `${workspaceRoot}/schema/x.md` };
+    await expect(
+      resolveMissingNestedRelativeFile({
+        target: absoluteTarget,
+        workspaceRoot,
+        getDirectorySuggestions,
+      }),
+    ).resolves.toEqual(absoluteTarget);
+    expect(searches).toEqual([]);
+  });
+
+  it.each(["docs/guides", "./docs/guides", "docs/guides/"])(
+    "keeps folder href %s direct",
+    async (raw) => {
+      const { getDirectorySuggestions, searches } = suggestionsFromMap({
+        "docs/guides": [{ path: "repo-a/docs/guides", kind: "file" }],
+      });
+      const folderTarget = { raw, path: "/Users/test/project/docs/guides" };
+      await expect(
+        resolveMissingNestedRelativeFile({
+          target: folderTarget,
+          workspaceRoot: "/Users/test/project",
+          getDirectorySuggestions,
+        }),
+      ).resolves.toEqual(folderTarget);
+      expect(searches).toEqual([]);
+    },
+  );
+
+  it("normalizes a Windows workspace root before the suffix lookup", async () => {
+    const windowsTarget = {
+      raw: "schema/x.md",
+      path: "C:\\repo\\schema\\x.md",
+      lineStart: undefined,
+      lineEnd: undefined,
+    };
+    const { getDirectorySuggestions, searches } = suggestionsFromMap({
+      "schema/x.md": [{ path: "repo-a/schema/x.md", kind: "file" }],
+    });
+
+    const result = await resolveMissingNestedRelativeFile({
+      target: windowsTarget,
+      workspaceRoot: "C:\\repo\\",
+      getDirectorySuggestions,
+    });
+
+    expect(searches).toEqual([
+      {
+        query: "schema/x.md",
+        cwd: "C:\\repo\\",
+        matchMode: "suffix",
+        limit: 1,
+      },
+    ]);
+    expect(result.path).toBe("C:/repo/repo-a/schema/x.md");
+  });
+});
+
 describe("getAssistantFileLinkToken", () => {
   it("uses rendered text for markdown-it linkified tokens and href for explicit links", () => {
     expect(

packages/app/src/assistant-file-links/resolver.ts

@@ -5,6 +5,7 @@ import {
   type InlinePathTarget,
 } from "./parse";
 import { i18n } from "@/i18n/i18next";
+import { isAbsolutePath } from "@/utils/path";
 
 export interface AssistantFileLinkSource {
   href: string;
@@ -105,6 +106,62 @@ export async function fetchDaemonResolution({
   };
 }
 
+/** Only file-looking paths nested inside the workspace need suffix search. */
+function nestedRelativeLookupQuery(
+  targetPath: string,
+  workspaceRoot: string | undefined,
+): string | null {
+  const root = workspaceRoot?.trim();
+  if (!root) {
+    return null;
+  }
+  const normalizedRoot = root.replace(/\\/g, "/").replace(/\/+$/, "");
+  const normalizedPath = targetPath.replace(/\\/g, "/");
+  const prefix = `${normalizedRoot}/`;
+  if (!normalizedPath.startsWith(prefix)) {
+    return null;
+  }
+  const relative = normalizedPath.slice(prefix.length);
+  if (!relative.includes("/") || !isFileLookingAssistantToken(encodeURI(relative))) {
+    return null;
+  }
+  return relative;
+}
+
+/** When a markdown link points at workspaceRoot/schema/x.md and that file is
+ * missing, ask the same suffix lookup bare names already use. An exact hit
+ * stays on that path. A suffix hit such as repo-a/schema/x.md replaces it.
+ * Lookup failure keeps the original target.
+ */
+export async function resolveMissingNestedRelativeFile(input: {
+  target: InlinePathTarget;
+  workspaceRoot?: string;
+  getDirectorySuggestions: GetDirectorySuggestions;
+}): Promise<InlinePathTarget> {
+  if (
+    isAbsoluteInlineCodeToken(input.target.raw) ||
+    input.target.raw.startsWith("~/") ||
+    input.target.raw.endsWith("/")
+  ) {
+    return input.target;
+  }
+  const query = nestedRelativeLookupQuery(input.target.path, input.workspaceRoot);
+  if (!query) {
+    return input.target;
+  }
+  try {
+    return await fetchDaemonResolution({
+      ambiguousQuery: query,
+      token: input.target.raw,
+      target: input.target,
+      workspaceRoot: input.workspaceRoot,
+      getDirectorySuggestions: input.getDirectorySuggestions,
+    });
+  } catch {
+    return input.target;
+  }
+}
+
 export function classifyForResolution(
   source: AssistantFileLinkSource,
   context: AssistantFileLinkContext,
@@ -215,11 +272,7 @@ export function shouldResolveDirectFileThroughSuggestions(input: {
 }
 
 function isAbsoluteInlineCodeToken(token: string): boolean {
-  return (
-    token.startsWith("/") ||
-    token.toLowerCase().startsWith("file://") ||
-    /^[A-Za-z]:[\\/]/.test(token)
-  );
+  return isAbsolutePath(token) || token.toLowerCase().startsWith("file://");
 }
 
 function isLinkifiedSource(source: AssistantFileLinkSource): boolean {

packages/app/src/composer/draft/input-draft.live.test.tsx

@@ -2,7 +2,7 @@
 import React, { act } from "react";
 import { createRoot, type Root } from "react-dom/client";
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
-import { afterEach, beforeAll, beforeEach, describe, expect, it, vi } from "vitest";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import { useDraftStore } from "@/stores/draft-store";
 import type { AttachmentMetadata, ComposerAttachment } from "@/attachments/types";
 import { createWorkspaceFileAttachment } from "@/attachments/workspace-file";
@@ -126,17 +126,13 @@ afterEach(async () => {
   });
 });
 
-let useAgentInputDraft: typeof import("./input-draft").useAgentInputDraft;
 type DraftRecordForTest = ReturnType<typeof useDraftStore.getState>["drafts"][string];
 
-beforeAll(async () => {
-  Object.defineProperty(globalThis, "IS_REACT_ACT_ENVIRONMENT", {
-    value: true,
-    configurable: true,
-  });
-
-  ({ useAgentInputDraft } = await import("./input-draft"));
+Object.defineProperty(globalThis, "IS_REACT_ACT_ENVIRONMENT", {
+  value: true,
+  configurable: true,
 });
+const { useAgentInputDraft } = await import("./input-draft");
 
 describe("useAgentInputDraft live contract", () => {
   beforeEach(() => {

packages/app/src/hooks/use-agent-history.test.ts

@@ -1,4 +1,4 @@
-import { beforeAll, describe, expect, it } from "vitest";
+import { describe, expect, it } from "vitest";
 import type {
   DaemonClient,
   FetchAgentHistoryEntry,
@@ -13,18 +13,8 @@ import { allAgentHistoryQueryKey } from "./agent-history-query-key";
   }
 ).__DEV__ = false;
 
-type UseAgentHistoryModule = typeof import("./use-agent-history");
-
-let fetchAgentHistoryBatch: UseAgentHistoryModule["fetchAgentHistoryBatch"];
-let fetchAgentHistoryPage: UseAgentHistoryModule["fetchAgentHistoryPage"];
-let collectAgentHistoryHostErrors: UseAgentHistoryModule["collectAgentHistoryHostErrors"];
-
-beforeAll(async () => {
-  const module = await import("./use-agent-history");
-  fetchAgentHistoryBatch = module.fetchAgentHistoryBatch;
-  fetchAgentHistoryPage = module.fetchAgentHistoryPage;
-  collectAgentHistoryHostErrors = module.collectAgentHistoryHostErrors;
-});
+const { fetchAgentHistoryBatch, fetchAgentHistoryPage, collectAgentHistoryHostErrors } =
+  await import("./use-agent-history");
 
 type FetchAgentHistory = DaemonClient["fetchAgentHistory"];
 type FetchAgentHistoryResult = Awaited<ReturnType<FetchAgentHistory>>;

packages/server/src/server/agent/agent-manager.ts

@@ -3505,6 +3505,10 @@ export class AgentManager {
         "agent.rewind.complete",
       );
     } catch (error) {
+      // Native rewind can commit a fork before history refresh fails. Recovery
+      // must resume that latest handle rather than the abandoned conversation.
+      this.refreshSessionPersistence(agent);
+      await this.persistSnapshot(agent);
       this.logger.warn(
         { err: error, agentId, provider: agent.provider, messageId, mode },
         "agent.rewind.failed",

packages/server/src/server/agent/plugin-provider.test.ts

@@ -53,6 +53,7 @@ const CAPABILITIES = [
 interface ProviderHarnessOptions {
   capabilities?: ProviderConnection["capabilities"];
   completeTurn?: boolean;
+  closeAcknowledgementOnly?: boolean;
   openChildren?: (rootSessionId: string, emit: (event: ProviderEvent) => void) => void;
   handleInput?: (input: ProviderInput, emit: (event: ProviderEvent) => void) => Promise<boolean>;
 }
@@ -208,6 +209,7 @@ function createProviderHarness(options: ProviderHarnessOptions = {}) {
       }
       if (input.type === "session.close") {
         emit({ type: "session.closed", sessionId: input.sessionId });
+        if (options.closeAcknowledgementOnly) return;
       }
       if ("requestId" in input) {
         emit({ type: "request.completed", requestId: input.requestId });
@@ -246,6 +248,572 @@ function eventsOfType(events: AgentStreamEvent[], type: AgentStreamEvent["type"]
   return events.filter((event) => event.type === type);
 }
 
+function createRewindProviderHarness(
+  options: {
+    reuseAnswerId?: boolean;
+    forkOnRevert?: boolean;
+    handleInput?: ProviderHarnessOptions["handleInput"];
+  } = {},
+) {
+  const nativeMessages: string[] = [];
+  let originalMessages: string[] | null = null;
+  const harness = createProviderHarness({
+    closeAcknowledgementOnly: true,
+    capabilities: [
+      ...CAPABILITIES,
+      "session.revert.conversation",
+      "session.revert.files",
+      "session.revert.both",
+    ],
+    async handleInput(input, emit) {
+      if (await options.handleInput?.(input, emit)) return true;
+      if (input.type === "session.open" && input.history === "replay") {
+        emit({
+          type: "session.opened",
+          requestId: input.requestId,
+          sessionId: input.sessionId,
+          capabilities: [
+            ...CAPABILITIES,
+            "session.revert.conversation",
+            "session.revert.files",
+            "session.revert.both",
+          ],
+          restoration: "core",
+          persistence: input.persistence ?? { version: 1, data: { token: "root" } },
+          cwd: input.config.cwd,
+        });
+        const messages =
+          options.forkOnRevert &&
+          (input.persistence?.data as { token?: string })?.token === "root" &&
+          originalMessages
+            ? originalMessages
+            : nativeMessages;
+        for (const [index, text] of messages.entries()) {
+          emit({
+            type: "timeline.item",
+            sessionId: input.sessionId,
+            item: { type: "user_message", id: `user-${text}`, text, revertToken: text },
+          });
+          emit({
+            type: "timeline.item",
+            sessionId: input.sessionId,
+            item: {
+              type: "assistant_message",
+              id: options.reuseAnswerId ? `answer-${index + 1}` : `answer-${text}`,
+              text: `Reply ${text}`,
+            },
+          });
+        }
+        emit({ type: "session.ready", requestId: input.requestId, sessionId: input.sessionId });
+        return true;
+      }
+      if (input.type === "session.prompt") {
+        if (input.prompt.input.type !== "message") throw new Error("Expected a message");
+        const text = input.prompt.input.content
+          .flatMap((part) => (part.type === "text" ? [part.text] : []))
+          .join("");
+        nativeMessages.push(text);
+        const turnId = `turn-${text}`;
+        emit({
+          type: "session.prompt_result",
+          sessionId: input.sessionId,
+          clientMessageId: input.prompt.clientMessageId,
+          result: { type: "turn", turnId },
+        });
+        emit({ type: "session.turn", sessionId: input.sessionId, turnId, state: "started" });
+        emit({
+          type: "timeline.item",
+          sessionId: input.sessionId,
+          item: {
+            type: "user_message",
+            id: `user-${text}`,
+            text,
+            clientMessageId: input.prompt.clientMessageId,
+            revertToken: text,
+          },
+        });
+        emit({
+          type: "timeline.item",
+          sessionId: input.sessionId,
+          item: {
+            type: "assistant_message",
+            id: options.reuseAnswerId ? `answer-${nativeMessages.length}` : `answer-${text}`,
+            text: `Reply ${text}`,
+          },
+        });
+        emit({ type: "session.turn", sessionId: input.sessionId, turnId, state: "completed" });
+        return true;
+      }
+      if (input.type === "session.revert") {
+        if (options.forkOnRevert && input.scope !== "files") {
+          originalMessages = [...nativeMessages];
+          emit({
+            type: "session.persistence",
+            sessionId: input.sessionId,
+            persistence: { version: 1, data: { token: "fork" } },
+          });
+        }
+        if (input.scope !== "files")
+          nativeMessages.splice(nativeMessages.indexOf(String(input.token)));
+        emit({ type: "request.completed", requestId: input.requestId });
+        return true;
+      }
+      return false;
+    },
+  });
+  return { ...harness, nativeMessages };
+}
+
+async function withRewindAgent(
+  run: (context: {
+    manager: AgentManager;
+    agentId: string;
+    nativeMessages: string[];
+    messages: () => string[];
+  }) => Promise<void>,
+  options: Parameters<typeof createRewindProviderHarness>[0] = {},
+) {
+  const harness = createRewindProviderHarness(options);
+  const logger = createTestLogger();
+  const registry = new PluginAgentClientRegistry(logger);
+  registry.replace([harness.registration]);
+  const manager = new AgentManager({
+    logger,
+    clients: registry.clients(),
+    providerDefinitions: registry.definitions(),
+  });
+  const agent = await manager.createAgent(
+    { provider: harness.registration.id, cwd: tmpdir() },
+    undefined,
+    { workspaceId: undefined },
+  );
+  const messages = () =>
+    manager
+      .getTimeline(agent.id)
+      .flatMap((item) =>
+        item.type === "user_message" || item.type === "assistant_message" ? [item.text] : [],
+      );
+  try {
+    await manager.runAgent(agent.id, "A", { clientMessageId: "client-A" });
+    await manager.runAgent(agent.id, "B", { clientMessageId: "client-B" });
+    await manager.runAgent(agent.id, "C", { clientMessageId: "client-C" });
+    expect(messages()).toEqual(["A", "Reply A", "B", "Reply B", "C", "Reply C"]);
+    await run({ manager, agentId: agent.id, nativeMessages: harness.nativeMessages, messages });
+  } finally {
+    await manager.closeAgent(agent.id);
+    await registry.shutdown();
+  }
+}
+
+test("conversation rewind discards withdrawn plugin turns before and after a replacement prompt", async () => {
+  await withRewindAgent(async ({ manager, agentId, nativeMessages, messages }) => {
+    await manager.rewind(agentId, "user-B", "conversation");
+    const afterRewind = messages();
+    expect(nativeMessages).toEqual(["A"]);
+    await manager.runAgent(agentId, "D", { clientMessageId: "client-D" });
+    const afterReplacement = messages();
+    expect(nativeMessages).toEqual(["A", "D"]);
+    expect({ afterRewind, afterReplacement }).toEqual({
+      afterRewind: ["A", "Reply A"],
+      afterReplacement: ["A", "Reply A", "D", "Reply D"],
+    });
+  });
+});
+
+test("file-only plugin rewind preserves the conversation before and after a replacement prompt", async () => {
+  await withRewindAgent(async ({ manager, agentId, nativeMessages, messages }) => {
+    await manager.rewind(agentId, "user-B", "files");
+    expect(nativeMessages).toEqual(["A", "B", "C"]);
+    expect(messages()).toEqual(["A", "Reply A", "B", "Reply B", "C", "Reply C"]);
+    await manager.runAgent(agentId, "D", { clientMessageId: "client-D" });
+    expect(messages()).toEqual(["A", "Reply A", "B", "Reply B", "C", "Reply C", "D", "Reply D"]);
+  });
+});
+
+test("plugin rewind restores translation state when a replacement reuses a discarded item id", async () => {
+  const harness = createRewindProviderHarness({ reuseAnswerId: true });
+  const registry = new PluginAgentClientRegistry(createTestLogger());
+  registry.replace([harness.registration]);
+  const client = registry.clients()[harness.registration.id]!;
+  const session = await client.createSession({ provider: harness.registration.id, cwd: tmpdir() });
+  const live: AgentStreamEvent[] = [];
+  try {
+    await session.run("A");
+    await session.run("B");
+    session.subscribe((event) => live.push(event));
+    await session.revertConversation!({ messageId: "user-B" });
+    live.length = 0;
+    await session.run("B revised");
+    const assistant = live.flatMap((event) =>
+      event.type === "timeline" && event.item.type === "assistant_message" ? [event.item.text] : [],
+    );
+    expect(harness.nativeMessages).toEqual(["A", "B revised"]);
+    expect(assistant).toEqual(["Reply B revised"]);
+  } finally {
+    await session.close();
+    await registry.shutdown();
+  }
+});
+
+async function withPluginRewindSession(
+  options: Parameters<typeof createRewindProviderHarness>[0],
+  run: (
+    session: Awaited<ReturnType<AgentClient["createSession"]>>,
+    harness: ReturnType<typeof createRewindProviderHarness>,
+  ) => Promise<void>,
+) {
+  const harness = createRewindProviderHarness(options);
+  const registry = new PluginAgentClientRegistry(createTestLogger());
+  registry.replace([harness.registration]);
+  const client = registry.clients()[harness.registration.id]!;
+  const session = await client.createSession({ provider: harness.registration.id, cwd: tmpdir() });
+  try {
+    await session.run("A");
+    await session.run("B");
+    await session.run("C");
+    await run(session, harness);
+  } finally {
+    await session.close();
+    await registry.shutdown();
+  }
+}
+
+async function pluginMessages(session: Awaited<ReturnType<AgentClient["createSession"]>>) {
+  const events = await Array.fromAsync(session.streamHistory());
+  return events.flatMap((event) =>
+    event.type === "timeline" &&
+    (event.item.type === "user_message" || event.item.type === "assistant_message")
+      ? [event.item.text]
+      : [],
+  );
+}
+
+test("combined plugin rewind replays the retained native branch", async () => {
+  await withPluginRewindSession({}, async (session) => {
+    await session.revertBoth!({ messageId: "user-B" });
+    expect(await pluginMessages(session)).toEqual(["A", "Reply A"]);
+    await session.revertConversation!({ messageId: "user-A" });
+    expect(await pluginMessages(session)).toEqual([]);
+  });
+});
+
+test("plugin rewind resumes the latest persistence rather than the original handle", async () => {
+  await withPluginRewindSession(
+    {
+      handleInput: async (input, emit) => {
+        if (input.type === "session.revert")
+          emit({
+            type: "session.persistence",
+            sessionId: input.sessionId,
+            persistence: { version: 1, data: { token: "fork" } },
+          });
+        return false;
+      },
+    },
+    async (session, harness) => {
+      await session.revertConversation!({ messageId: "user-B" });
+      expect(harness.inputs.findLast((input) => input.type === "session.open")).toMatchObject({
+        persistence: { version: 1, data: { token: "fork" } },
+        history: "replay",
+      });
+      expect(await pluginMessages(session)).toEqual(["A", "Reply A"]);
+    },
+  );
+});
+
+test("failed native plugin rewind preserves history and does not reopen", async () => {
+  await withPluginRewindSession(
+    {
+      handleInput: async (input, emit) => {
+        if (input.type !== "session.revert") return false;
+        emit({
+          type: "request.failed",
+          requestId: input.requestId,
+          error: { message: "native rewind failed" },
+        });
+        return true;
+      },
+    },
+    async (session, harness) => {
+      await expect(session.revertConversation!({ messageId: "user-B" })).rejects.toThrow(
+        "native rewind failed",
+      );
+      expect(await pluginMessages(session)).toEqual([
+        "A",
+        "Reply A",
+        "B",
+        "Reply B",
+        "C",
+        "Reply C",
+      ]);
+      expect(harness.inputs.filter((input) => input.type === "session.open")).toHaveLength(1);
+    },
+  );
+});
+
+test("failed plugin rewind replay blocks prompts until retry without repeating native rewind", async () => {
+  let failReplay = true;
+  await withPluginRewindSession(
+    {
+      handleInput: async (input, emit) => {
+        if (input.type !== "session.open" || input.history !== "replay" || !failReplay)
+          return false;
+        failReplay = false;
+        emit({
+          type: "request.failed",
+          requestId: input.requestId,
+          error: { message: "replay failed" },
+        });
+        return true;
+      },
+    },
+    async (session, harness) => {
+      await expect(session.revertConversation!({ messageId: "user-B" })).rejects.toThrow(
+        "replay failed",
+      );
+      await expect(session.run("D")).rejects.toThrow("Retry the rewind or reload");
+      await session.revertConversation!({ messageId: "user-B" });
+      await session.run("D");
+      expect(await pluginMessages(session)).toEqual(["A", "Reply A", "D", "Reply D"]);
+      expect(harness.inputs.filter((input) => input.type === "session.revert")).toHaveLength(1);
+    },
+  );
+});
+
+test("retrying a failed plugin rewind replay replaces the manager timeline before prompting", async () => {
+  let failReplay = true;
+  await withRewindAgent(
+    async ({ manager, agentId, messages }) => {
+      await expect(manager.rewind(agentId, "user-B", "conversation")).rejects.toThrow(
+        "replay failed",
+      );
+      await expect(manager.runAgent(agentId, "D")).rejects.toThrow("Retry the rewind or reload");
+      await manager.rewind(agentId, "user-B", "conversation");
+      expect(messages()).toEqual(["A", "Reply A"]);
+      await manager.runAgent(agentId, "D");
+      expect(messages()).toEqual(["A", "Reply A", "D", "Reply D"]);
+    },
+    {
+      handleInput: async (input, emit) => {
+        if (input.type !== "session.open" || input.history !== "replay" || !failReplay)
+          return false;
+        failReplay = false;
+        emit({
+          type: "request.failed",
+          requestId: input.requestId,
+          error: { message: "replay failed" },
+        });
+        return true;
+      },
+    },
+  );
+});
+
+test("reload after failed plugin rewind replay resumes the committed fork", async () => {
+  let failReplay = true;
+  await withRewindAgent(
+    async ({ manager, agentId, messages }) => {
+      await expect(manager.rewind(agentId, "user-B", "conversation")).rejects.toThrow(
+        "replay failed",
+      );
+      await manager.reloadAgentSession(agentId, undefined, { rehydrateFromDisk: true });
+      await manager.hydrateTimelineFromProvider(agentId, { force: true });
+      expect(messages()).toEqual(["A", "Reply A"]);
+    },
+    {
+      forkOnRevert: true,
+      handleInput: async (input, emit) => {
+        if (input.type === "session.close") {
+          emit({ type: "request.completed", requestId: input.requestId });
+          return true;
+        }
+        if (input.type !== "session.open" || input.history !== "replay" || !failReplay)
+          return false;
+        failReplay = false;
+        emit({
+          type: "request.failed",
+          requestId: input.requestId,
+          error: { message: "replay failed" },
+        });
+        return true;
+      },
+    },
+  );
+});
+
+test("closing during plugin rewind replay closes each native binding once", async () => {
+  let opened!: () => void;
+  let release!: () => void;
+  const replayStarted = new Promise<void>((resolve) => {
+    opened = resolve;
+  });
+  const replayAllowed = new Promise<void>((resolve) => {
+    release = resolve;
+  });
+  await withPluginRewindSession(
+    {
+      handleInput: async (input) => {
+        if (input.type === "session.open" && input.history === "replay") {
+          opened();
+          await replayAllowed;
+        }
+        return false;
+      },
+    },
+    async (session, harness) => {
+      const rewind = session.revertConversation!({ messageId: "user-B" });
+      await replayStarted;
+      const closing = session.close();
+      release();
+      await Promise.all([rewind, closing]);
+      const closes = harness.inputs.flatMap((input) =>
+        input.type === "session.close" ? [input.sessionId] : [],
+      );
+      expect(closes).toHaveLength(2);
+      expect(new Set(closes).size).toBe(2);
+    },
+  );
+});
+
+test("plugin rewind retries a failed close before reopening the native writer", async () => {
+  let failClose = true;
+  await withPluginRewindSession(
+    {
+      handleInput: async (input, emit) => {
+        if (input.type !== "session.close" || !failClose) return false;
+        failClose = false;
+        emit({
+          type: "request.failed",
+          requestId: input.requestId,
+          error: { message: "close failed" },
+        });
+        return true;
+      },
+    },
+    async (session, harness) => {
+      await expect(session.revertConversation!({ messageId: "user-B" })).rejects.toThrow(
+        "close failed",
+      );
+      expect(harness.inputs.filter((input) => input.type === "session.open")).toHaveLength(1);
+      expect(await pluginMessages(session)).toEqual(["A", "Reply A"]);
+      expect(harness.inputs.filter((input) => input.type === "session.revert")).toHaveLength(1);
+    },
+  );
+});
+
+test("plugin rewind retries permission settlement before retiring its session", async () => {
+  let failPermission = true;
+  await withPluginRewindSession(
+    {
+      handleInput: async (input) => {
+        if (input.type !== "session.permission" || !failPermission) return false;
+        failPermission = false;
+        throw new Error("permission delivery failed");
+      },
+    },
+    async (session, harness) => {
+      const opened = harness.inputs.find((input) => input.type === "session.open")!;
+      if (opened.type !== "session.open") throw new Error("Missing root");
+      harness.emit({
+        type: "session.permission",
+        sessionId: opened.sessionId,
+        request: { id: "pending", name: "tool", kind: "tool" },
+      });
+      await expect(session.revertConversation!({ messageId: "user-B" })).rejects.toThrow(
+        "permission delivery failed",
+      );
+      expect(session.getPendingPermissions()).toHaveLength(1);
+      expect(harness.inputs.filter((input) => input.type === "session.close")).toHaveLength(0);
+      expect(await pluginMessages(session)).toEqual(["A", "Reply A"]);
+      expect(session.getPendingPermissions()).toEqual([]);
+      expect(harness.inputs.filter((input) => input.type === "session.permission")).toHaveLength(2);
+    },
+  );
+});
+
+test("plugin rewind replaces child listeners and settles old pending permissions", async () => {
+  await withPluginRewindSession({}, async (session, harness) => {
+    const root = harness.inputs.find((input) => input.type === "session.open")!;
+    if (root.type !== "session.open") throw new Error("Missing root");
+    harness.emit({
+      type: "session.permission",
+      sessionId: root.sessionId,
+      request: { id: "old-permission", name: "tool", kind: "tool", title: "Run tool" },
+    });
+    expect(session.getPendingPermissions()).toHaveLength(1);
+    await session.revertConversation!({ messageId: "user-B" });
+    expect(session.getPendingPermissions()).toEqual([]);
+    expect(harness.inputs).toContainEqual(
+      expect.objectContaining({
+        type: "session.permission",
+        permissionId: "old-permission",
+        response: { behavior: "deny", message: "Session replaced after rewind" },
+      }),
+    );
+    harness.emit({
+      type: "timeline.item",
+      sessionId: "child-1",
+      item: { type: "assistant_message", id: "child-message", text: "Discarded child update" },
+    });
+    const history = await Array.fromAsync(session.streamHistory());
+    expect(history.filter((event) => event.type === "provider_subagent")).toEqual([]);
+    const reopened = harness.inputs.findLast((input) => input.type === "session.open")!;
+    if (reopened.type !== "session.open") throw new Error("Missing reopened root");
+    harness.emit({
+      type: "session.opened",
+      sessionId: "child-1",
+      parentSessionId: reopened.sessionId,
+      capabilities: [],
+      restoration: "parent",
+      cwd: tmpdir(),
+    });
+    harness.emit({
+      type: "timeline.item",
+      sessionId: "child-1",
+      item: { type: "assistant_message", id: "child-message", text: "New child reply" },
+    });
+    const next = await Array.fromAsync(session.streamHistory());
+    expect(next).toContainEqual(
+      expect.objectContaining({
+        type: "provider_subagent",
+        event: expect.objectContaining({
+          type: "timeline",
+          item: expect.objectContaining({ text: "New child reply" }),
+        }),
+      }),
+    );
+  });
+});
+
+test("nonpersisted plugin sessions reject conversation rewind before native mutation", async () => {
+  await withPluginRewindSession(
+    {
+      handleInput: async (input, emit) => {
+        if (input.type !== "session.open") return false;
+        emit({
+          type: "session.opened",
+          requestId: input.requestId,
+          sessionId: input.sessionId,
+          capabilities: [...CAPABILITIES, "session.revert.conversation", "session.revert.files"],
+          restoration: "core",
+          cwd: input.config.cwd,
+        });
+        emit({ type: "session.ready", requestId: input.requestId, sessionId: input.sessionId });
+        return true;
+      },
+    },
+    async (session, harness) => {
+      expect(session.capabilities.supportsRewindConversation).toBe(false);
+      await expect(session.revertConversation!({ messageId: "user-B" })).rejects.toThrow(
+        "requires session persistence",
+      );
+      expect(harness.inputs.filter((input) => input.type === "session.revert")).toEqual([]);
+      await session.revertFiles!({ messageId: "user-B" });
+      expect(harness.nativeMessages).toEqual(["A", "B", "C"]);
+    },
+  );
+});
+
 function openNestedChildren(rootSessionId: string, emit: (event: ProviderEvent) => void) {
   for (const [sessionId, parentSessionId] of [
     ["a", rootSessionId],

packages/server/src/server/agent/plugin-provider.ts

@@ -603,6 +603,7 @@ class ProviderRuntimeSession {
   >();
   private readonly activeTurnIds = new Set<string>();
   private terminal = false;
+  private closePromise: Promise<void> | null = null;
   config: ProviderConfigState = { models: [], modes: [], thinkingOptions: [], settings: [] };
   commands: Array<{ name: string; description: string; argumentHint?: string }> = [];
   persistence: ProviderPersistence | null = null;
@@ -724,6 +725,14 @@ class ProviderRuntimeSession {
       this.runtime.removeSession(this.id, this.providerSessionId);
       return;
     }
+    this.closePromise ??= this.closeNativeSession().catch((error) => {
+      this.closePromise = null;
+      throw error;
+    });
+    await this.closePromise;
+  }
+
+  private async closeNativeSession(): Promise<void> {
     try {
       await this.runtime.complete({
         type: "session.close",
@@ -732,9 +741,9 @@ class ProviderRuntimeSession {
       });
     } catch (error) {
       if (!this.runtime.isClosed) throw error;
-    } finally {
-      this.runtime.removeSession(this.id, this.providerSessionId);
     }
+    // A failed close still needs its routing for a subsequent session.closed ack.
+    this.runtime.removeSession(this.id, this.providerSessionId);
   }
 
   beginOpen(requestId: string): Promise<void> {
@@ -1092,11 +1101,40 @@ class PluginAgentClient implements AgentClient {
       persistence: input.persistence,
       history: input.history,
     });
-    const session = new PluginAgentSession(this.provider, bridge, () => {
-      this.rootsBySession.delete(bridge.id);
-    });
-    this.rootsBySession.set(bridge.id, session);
-    this.attachPendingChildren();
+    const forget = () => {
+      for (const [id, owner] of this.rootsBySession) {
+        if (owner === session) this.rootsBySession.delete(id);
+      }
+    };
+    const bind = (next: ProviderRuntimeSession) => {
+      this.rootsBySession.set(next.id, session);
+      this.attachPendingChildren();
+    };
+    const config = mapSessionConfig(input.config, input.launchContext, input.persist);
+    const session = new PluginAgentSession(
+      this.provider,
+      bridge,
+      forget,
+      async (persistence, state) => {
+        forget();
+        return await this.runtime.openSession({
+          sessionId: randomUUID(),
+          config: {
+            ...config,
+            model: state.model,
+            mode: state.mode,
+            thinkingOption: state.thinkingOption,
+            settings: Object.fromEntries(
+              state.settings.map((setting) => [setting.id, setting.value]),
+            ),
+          },
+          persistence,
+          history: "replay",
+        });
+      },
+      bind,
+    );
+    bind(bridge);
     return session;
   }
 
@@ -1157,16 +1195,32 @@ class PluginAgentSession implements AgentSession {
   private readonly revertTokens = new Map<string, ProviderTimelineItem["revertToken"]>();
   private readonly timelineSnapshots = new Map<string, TimelineTextSnapshot>();
   private readonly subagentIdsBySession = new Map<string, string | null>();
-  private readonly childUnsubscribes = new Map<string, () => void>();
+  private readonly children = new Map<
+    string,
+    { session: ProviderRuntimeSession; unsubscribe: () => void }
+  >();
   private readonly childSnapshots = new Map<string, Map<string, TimelineTextSnapshot>>();
   private unsubscribe: (() => void) | null = null;
   private currentTurnId: string | null = null;
   private closed = false;
+  private replay: {
+    persistence: ProviderPersistence;
+    config: ProviderConfigState;
+    messageId: string;
+    scope: "conversation" | "both";
+    closed: boolean;
+  } | null = null;
+  private replaying: Promise<void> | null = null;
 
   constructor(
     readonly provider: string,
-    private readonly bridge: ProviderRuntimeSession,
+    private bridge: ProviderRuntimeSession,
     private readonly onClose: () => void,
+    private readonly reopen: (
+      persistence: ProviderPersistence,
+      state: ProviderConfigState,
+    ) => Promise<ProviderRuntimeSession>,
+    private readonly onBind: (bridge: ProviderRuntimeSession) => void,
   ) {
     this.subagentIdsBySession.set(bridge.id, null);
     for (const event of bridge.history) this.accept(event, false);
@@ -1183,7 +1237,13 @@ class PluginAgentSession implements AgentSession {
   }
 
   get capabilities(): AgentCapabilityFlags {
-    return agentCapabilities(this.bridge.negotiatedCapabilities);
+    const capabilities = agentCapabilities(this.bridge.negotiatedCapabilities);
+    const resumable = this.canReplayHistory;
+    return {
+      ...capabilities,
+      supportsRewindConversation: capabilities.supportsRewindConversation && resumable,
+      supportsRewindBoth: capabilities.supportsRewindBoth && resumable,
+    };
   }
 
   get features(): AgentFeature[] {
@@ -1211,6 +1271,7 @@ class PluginAgentSession implements AgentSession {
     prompt: AgentPromptInput,
     options: AgentRunOptions = {},
   ): Promise<{ turnId: string }> {
+    this.assertReplayComplete();
     const clientMessageId = options.clientMessageId ?? randomUUID();
     const result = await this.bridge.prompt({
       clientMessageId,
@@ -1233,6 +1294,7 @@ class PluginAgentSession implements AgentSession {
     prompt: AgentPromptInput,
     options: SteerActiveTurnOptions,
   ): Promise<SteerResult> {
+    this.assertReplayComplete();
     if (!this.bridge.negotiatedCapabilities.includes("prompt.steer")) {
       return { status: "unavailable" };
     }
@@ -1256,6 +1318,7 @@ class PluginAgentSession implements AgentSession {
   }
 
   async *streamHistory(): AsyncGenerator<AgentStreamEvent> {
+    await this.ensureReplay();
     for (const event of this.history.read(this.provider)) yield event;
   }
 
@@ -1283,6 +1346,7 @@ class PluginAgentSession implements AgentSession {
   }
 
   async setMode(modeId: string): Promise<void> {
+    this.assertReplayComplete();
     await this.bridge.configure({ mode: modeId });
   }
 
@@ -1319,17 +1383,10 @@ class PluginAgentSession implements AgentSession {
   async close(): Promise<void> {
     if (this.closed) return;
     this.closed = true;
-    this.unsubscribe?.();
-    this.unsubscribe = null;
-    for (const unsubscribe of this.childUnsubscribes.values()) unsubscribe();
-    this.childUnsubscribes.clear();
-    this.subagentIdsBySession.clear();
-    this.history.clear();
-    this.timelineSnapshots.clear();
-    this.childSnapshots.clear();
-    this.revertTokens.clear();
-    this.pendingPermissions.clear();
-    this.permissionResponses.clear();
+    this.listeners.clear();
+    await this.replaying?.catch(() => undefined);
+    await this.clearBinding();
+    this.replay = null;
     this.listeners.clear();
     this.onClose();
     await this.bridge.close();
@@ -1344,14 +1401,17 @@ class PluginAgentSession implements AgentSession {
   }
 
   async setModel(modelId: string | null): Promise<void> {
+    this.assertReplayComplete();
     await this.bridge.configure({ model: modelId });
   }
 
   async setThinkingOption(thinkingOptionId: string | null): Promise<void> {
+    this.assertReplayComplete();
     await this.bridge.configure({ thinkingOption: thinkingOptionId });
   }
 
   async setFeature(featureId: string, value: unknown): Promise<void> {
+    this.assertReplayComplete();
     await this.bridge.configure({
       settings: { [featureId]: toJsonValue(value, `setting '${featureId}'`) },
     });
@@ -1415,10 +1475,10 @@ class PluginAgentSession implements AgentSession {
     const snapshots = new Map<string, TimelineTextSnapshot>();
     this.childSnapshots.set(childId, snapshots);
     for (const event of child.history) this.acceptChildEvent(childId, event, snapshots);
-    this.childUnsubscribes.set(
-      child.id,
-      child.onEvent((event) => this.acceptChildEvent(childId, event, snapshots)),
-    );
+    this.children.set(child.id, {
+      session: child,
+      unsubscribe: child.onEvent((event) => this.acceptChildEvent(childId, event, snapshots)),
+    });
   }
 
   private accept(event: ProviderEvent, live: boolean): void {
@@ -1636,7 +1696,84 @@ class PluginAgentSession implements AgentSession {
     }
   }
 
+  private async clearBinding(): Promise<void> {
+    this.unsubscribe?.();
+    this.unsubscribe = null;
+    for (const child of this.children.values()) {
+      child.unsubscribe();
+      await child.session.close();
+    }
+    this.children.clear();
+    this.subagentIdsBySession.clear();
+    this.history.clear();
+    this.timelineSnapshots.clear();
+    this.childSnapshots.clear();
+    this.revertTokens.clear();
+    this.pendingPermissions.clear();
+    this.permissionResponses.clear();
+    this.currentTurnId = null;
+  }
+
+  private assertReplayComplete(): void {
+    if (this.replay) {
+      throw new Error(
+        "Plugin rewind history refresh is incomplete. Retry the rewind or reload the agent before continuing.",
+      );
+    }
+  }
+
+  // A native rewind has already committed. Until replay succeeds, neither history
+  // nor a new prompt may use the retired binding. Keep its latest handle for retry.
+  private async ensureReplay(): Promise<void> {
+    if (!this.replay) return;
+    if (this.closed) throw new StaleProviderSessionError(this.id);
+    if (!this.replaying) {
+      this.replaying = this.replayBinding().finally(() => {
+        this.replaying = null;
+      });
+    }
+    await this.replaying;
+  }
+
+  private async replayBinding(): Promise<void> {
+    const replay = this.replay!;
+    if (!replay.closed) {
+      for (const request of this.pendingPermissions.values()) {
+        await this.respondToPermission(request.id, {
+          behavior: "deny",
+          message: "Session replaced after rewind",
+        });
+        this.pendingPermissions.delete(request.id);
+        this.permissionResponses.delete(request.id);
+      }
+      await this.clearBinding();
+      await this.bridge.close();
+      replay.closed = true;
+    }
+    const bridge = await this.reopen(replay.persistence, replay.config);
+    this.bridge = bridge;
+    this.subagentIdsBySession.set(bridge.id, null);
+    for (const event of bridge.history) this.accept(event, false);
+    this.unsubscribe = bridge.onEvent((event) => this.accept(event, true));
+    this.onBind(bridge);
+    this.replay = null;
+  }
+
+  private get canReplayHistory(): boolean {
+    return (
+      this.bridge.restoration === "core" &&
+      this.bridge.persistence !== null &&
+      this.bridge.negotiatedCapabilities.includes("session.persistence")
+    );
+  }
+
   private async revert(messageId: string, scope: "conversation" | "files" | "both") {
+    const pending = this.replay;
+    await this.ensureReplay();
+    if (pending?.messageId === messageId && pending.scope === scope) return;
+    if (scope !== "files" && !this.canReplayHistory) {
+      throw new Error("Plugin conversation rewind requires session persistence for history replay");
+    }
     const token = this.revertTokens.get(messageId);
     if (token === undefined) throw new Error(`No provider revert token for message ${messageId}`);
     await this.bridge.revert({
@@ -1646,6 +1783,12 @@ class PluginAgentSession implements AgentSession {
       token,
       scope,
     });
+    if (scope !== "files") {
+      const persistence = this.bridge.persistence;
+      if (!persistence) throw new Error("Plugin rewind removed session persistence");
+      this.replay = { persistence, config: this.bridge.config, messageId, scope, closed: false };
+      await this.ensureReplay();
+    }
   }
 
   private publish(event: AgentStreamEvent): void {

patches/react-native-svg+15.15.4.patch

@@ -59,3 +59,130 @@ index 0c854d6..7dc2828 100644
    }
    return props.transform as TransformsStyle['transform'];
  }
+diff --git a/node_modules/react-native-svg/android/build.gradle b/node_modules/react-native-svg/android/build.gradle
+--- a/node_modules/react-native-svg/android/build.gradle
++++ b/node_modules/react-native-svg/android/build.gradle
+@@ -103,6 +103,7 @@
+     }
+ 
+     defaultConfig {
++        testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
+         minSdkVersion safeExtGet('minSdkVersion', 16)
+         //noinspection OldTargetApi
+         targetSdkVersion safeExtGet('targetSdkVersion', 28)
+@@ -136,6 +137,8 @@
+ }
+ 
+ dependencies {
++    androidTestImplementation 'androidx.test:runner:1.6.2'
++    androidTestImplementation 'androidx.test.ext:junit:1.2.1'
+     implementation 'com.facebook.react:react-native:+'
+     implementation("com.facebook.fresco:fresco:${FRESCO_VERSION}") {
+         exclude group: 'com.facebook.soloader'
+diff --git a/node_modules/react-native-svg/android/src/main/java/com/horcrux/svg/SvgView.java b/node_modules/react-native-svg/android/src/main/java/com/horcrux/svg/SvgView.java
+--- a/node_modules/react-native-svg/android/src/main/java/com/horcrux/svg/SvgView.java
++++ b/node_modules/react-native-svg/android/src/main/java/com/horcrux/svg/SvgView.java
+@@ -159,6 +159,8 @@
+   @Override
+   protected void onSizeChanged(int w, int h, int oldw, int oldh) {
+     super.onSizeChanged(w, h, oldw, oldh);
++    // Percentage lengths and paths depend on the canvas size, not just SVG props.
++    clearChildCache();
+     this.invalidate();
+   }
+ 
+diff --git a/node_modules/react-native-svg/android/src/androidTest/java/com/horcrux/svg/SvgResizeTest.java b/node_modules/react-native-svg/android/src/androidTest/java/com/horcrux/svg/SvgResizeTest.java
+new file mode 100644
+--- /dev/null
++++ b/node_modules/react-native-svg/android/src/androidTest/java/com/horcrux/svg/SvgResizeTest.java
+@@ -0,0 +1,90 @@
++package com.horcrux.svg;
++
++import static org.junit.Assert.assertEquals;
++import static org.junit.Assert.assertTrue;
++
++import android.graphics.Bitmap;
++import android.graphics.Canvas;
++import android.graphics.Color;
++import android.view.View;
++import androidx.test.ext.junit.runners.AndroidJUnit4;
++import androidx.test.platform.app.InstrumentationRegistry;
++import com.facebook.react.bridge.BridgeReactContext;
++import com.facebook.react.bridge.DynamicFromObject;
++import com.facebook.react.bridge.JavaOnlyArray;
++import com.facebook.react.bridge.JavaOnlyMap;
++import com.facebook.react.soloader.OpenSourceMergedSoMapping;
++import com.facebook.react.uimanager.DisplayMetricsHolder;
++import com.facebook.soloader.SoLoader;
++import org.junit.Test;
++import org.junit.runner.RunWith;
++
++@RunWith(AndroidJUnit4.class)
++public class SvgResizeTest {
++  @Test
++  public void percentageFadeFollowsCanvasGrowthAndShrinkage() {
++    InstrumentationRegistry.getInstrumentation().runOnMainSync(() -> {
++      android.content.Context app = InstrumentationRegistry.getInstrumentation().getTargetContext();
++      DisplayMetricsHolder.initDisplayMetricsIfNotInitialized(app);
++      try {
++        SoLoader.init(app, OpenSourceMergedSoMapping.INSTANCE);
++      } catch (java.io.IOException exception) {
++        throw new RuntimeException(exception);
++      }
++      BridgeReactContext context = new DrawingContext(app);
++      SvgView svg = new SvgView(context);
++      LinearGradientView gradient = new LinearGradientView(context);
++      gradient.setName("fade");
++      gradient.setX1(new DynamicFromObject("0%"));
++      gradient.setY1(new DynamicFromObject("0%"));
++      gradient.setX2(new DynamicFromObject("0%"));
++      gradient.setY2(new DynamicFromObject("100%"));
++      gradient.setGradientUnits(0);
++      gradient.setGradient(JavaOnlyArray.of(0.0, Color.RED, 1.0, Color.TRANSPARENT));
++      svg.addView(gradient);
++      // Exercise recursive invalidation as well as the direct child case.
++      GroupView group = new GroupView(context);
++      RectView rectangle = new RectView(context);
++      rectangle.setX(new DynamicFromObject(0.0));
++      rectangle.setY(new DynamicFromObject(0.0));
++      rectangle.setWidth(new DynamicFromObject("100%"));
++      rectangle.setHeight(new DynamicFromObject("100%"));
++      rectangle.setFill(JavaOnlyMap.of("type", 1, "brushRef", "fade"));
++      group.addView(rectangle);
++      svg.addView(group);
++
++      assertFade(svg, 80, 60);
++      assertFade(svg, 160, 120);
++      assertFade(svg, 60, 40);
++      assertFade(svg, 160, 120);
++    });
++  }
++
++  // Pixel rendering needs a React context but does not send layout events to JavaScript.
++  private static final class DrawingContext extends BridgeReactContext
++      implements com.facebook.react.uimanager.events.EventDispatcherProvider {
++    DrawingContext(android.content.Context context) { super(context); }
++
++    @Override
++    public com.facebook.react.uimanager.events.EventDispatcher getEventDispatcher() { return null; }
++  }
++
++  private static void assertFade(SvgView svg, int width, int height) {
++    svg.measure(View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY),
++        View.MeasureSpec.makeMeasureSpec(height, View.MeasureSpec.EXACTLY));
++    svg.layout(0, 0, width, height);
++    Bitmap image = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
++    svg.draw(new Canvas(image));
++    try {
++      int middle = Color.alpha(image.getPixel(width / 2, height / 2));
++      int right = Color.alpha(image.getPixel(width - 2, height / 2));
++      assertTrue("Gradient midpoint must follow canvas height at " + width + "x" + height
++          + "; alpha=" + middle, middle >= 120 && middle <= 135);
++      assertEquals("Fade must reach the right edge at " + width + "x" + height, middle, right);
++      assertTrue("Fade must end at the new bottom edge",
++          Color.alpha(image.getPixel(width / 2, height - 2)) < 20);
++    } finally {
++      image.recycle();
++    }
++  }
++}

public-docs/plugins/providers.md

@@ -287,6 +287,11 @@ Paseo refreshes an agent by closing its current provider session and opening it
 configuration and persistence. Re-read credentials, environment, global configuration, and MCP
 servers during `session.open`. There is no separate reload operation.
 
+Conversation and combined rewind require a core-restored session with persistence. After a
+successful rewind, Paseo closes the session and reopens its latest persistence value with
+`history: "replay"`. Publish the retained native branch before `session.ready`, including its
+children. File-only rewind keeps the current session and conversation history.
+
 Use `restoration: "core"` when Paseo can reopen a session from persistence. A provider-owned child
 uses `restoration: "parent"`; emit it as another `session.opened` event with `parentSessionId` and
 recreate it while restoring the parent.

scripts/postinstall-patches.mjs

@@ -59,6 +59,8 @@ const patchedPackages = [
     nodeModulesPath: "node_modules/@gorhom/bottom-sheet",
     patchPrefix: "@gorhom+bottom-sheet+",
   },
+  // Android resize: retain until upstream clears descendant geometry when the SVG canvas resizes.
+  // The native pixel regression is included in the patch; preserve the separate transform hunks.
   {
     nodeModulesPath: "packages/app/node_modules/react-native-svg",
     patchPrefix: "react-native-svg+",