Fix rebase type errors and add TODO date tag

- Await listAvailableEditorTargets() which became async on main
- Wrap sendAgentMessage callback to match Promise<void> return type
- Add TODO(2026-07) date to legacy editor target ids comment

packages/app/src/components/icons/editor-app-icons.tsx

@@ -1,5 +1,10 @@
+import { SquareTerminal } from "lucide-react-native";
 import { Image, type ImageSourcePropType } from "react-native";
-import type { EditorTargetId } from "@server/shared/messages";
+import {
+  isKnownEditorTargetId,
+  type EditorTargetId,
+  type KnownEditorTargetId,
+} from "@server/shared/messages";
 
 interface EditorAppIconProps {
   editorId: EditorTargetId;
@@ -8,9 +13,10 @@ interface EditorAppIconProps {
 }
 
 /* eslint-disable @typescript-eslint/no-require-imports */
-const EDITOR_APP_IMAGES: Record<EditorTargetId, ImageSourcePropType> = {
+const EDITOR_APP_IMAGES: Record<KnownEditorTargetId, ImageSourcePropType> = {
   cursor: require("../../../assets/images/editor-apps/cursor.png"),
   vscode: require("../../../assets/images/editor-apps/vscode.png"),
+  webstorm: require("../../../assets/images/editor-apps/webstorm.png"),
   zed: require("../../../assets/images/editor-apps/zed.png"),
   finder: require("../../../assets/images/editor-apps/finder.png"),
   explorer: require("../../../assets/images/editor-apps/file-explorer.png"),
@@ -18,10 +24,21 @@ const EDITOR_APP_IMAGES: Record<EditorTargetId, ImageSourcePropType> = {
 };
 /* eslint-enable @typescript-eslint/no-require-imports */
 
+export function hasBundledEditorAppIcon(
+  editorId: EditorTargetId,
+): editorId is KnownEditorTargetId {
+  return isKnownEditorTargetId(editorId);
+}
+
 export function EditorAppIcon({
   editorId,
   size = 16,
+  color,
 }: EditorAppIconProps) {
+  if (!hasBundledEditorAppIcon(editorId)) {
+    return <SquareTerminal size={size} color={color} />;
+  }
+
   return (
     <Image
       source={EDITOR_APP_IMAGES[editorId]}

packages/app/src/hooks/use-preferred-editor.test.ts

@@ -14,6 +14,12 @@ describe("resolvePreferredEditorId", () => {
     expect(resolvePreferredEditorId(["explorer", "vscode"], "finder")).toBe("explorer");
   });
 
+  it("keeps unknown editor ids when they are still available", () => {
+    expect(resolvePreferredEditorId(["unknown-editor", "cursor"], "unknown-editor")).toBe(
+      "unknown-editor",
+    );
+  });
+
   it("returns null when no editors are available", () => {
     expect(resolvePreferredEditorId([], "cursor")).toBeNull();
   });

packages/server/src/server/editor-targets.test.ts

@@ -3,7 +3,7 @@ import { listAvailableEditorTargets, openInEditorTarget } from "./editor-targets
 
 describe("editor-targets", () => {
   it("lists available editors in deterministic order", async () => {
-    const available = new Set(["code", "cursor", "explorer"]);
+    const available = new Set(["code", "cursor", "explorer", "webstorm"]);
 
     const editors = await listAvailableEditorTargets({
       platform: "win32",
@@ -13,6 +13,7 @@ describe("editor-targets", () => {
     expect(editors).toEqual([
       { id: "cursor", label: "Cursor" },
       { id: "vscode", label: "VS Code" },
+      { id: "webstorm", label: "WebStorm" },
       { id: "explorer", label: "Explorer" },
     ]);
   });
@@ -97,4 +98,19 @@ describe("editor-targets", () => {
       ),
     ).rejects.toThrow("Editor target unavailable: Finder");
   });
+
+  it("rejects unknown editor ids", async () => {
+    await expect(
+      openInEditorTarget(
+        {
+          editorId: "unknown-editor",
+          path: "/tmp/repo",
+        },
+        {
+          existsSync: () => true,
+          findExecutable: () => null,
+        },
+      ),
+    ).rejects.toThrow("Unknown editor target: unknown-editor");
+  });
 });

packages/server/src/server/editor-targets.ts

@@ -1,7 +1,11 @@
 import { spawn, type ChildProcess } from "node:child_process";
 import { existsSync } from "node:fs";
 import { posix, win32 } from "node:path";
-import type { EditorTargetDescriptorPayload, EditorTargetId } from "../shared/messages.js";
+import type {
+  EditorTargetDescriptorPayload,
+  EditorTargetId,
+  KnownEditorTargetId,
+} from "../shared/messages.js";
 import {
   findExecutable,
   quoteWindowsArgument,
@@ -9,7 +13,7 @@ import {
 } from "../utils/executable.js";
 
 type EditorTargetDefinition = {
-  id: EditorTargetId;
+  id: KnownEditorTargetId;
   label: string;
   command: string;
   platforms?: readonly NodeJS.Platform[];
@@ -29,6 +33,7 @@ type OpenInEditorTargetDependencies = ListAvailableEditorTargetsDependencies & {
 const EDITOR_TARGETS: readonly EditorTargetDefinition[] = [
   { id: "cursor", label: "Cursor", command: "cursor" },
   { id: "vscode", label: "VS Code", command: "code" },
+  { id: "webstorm", label: "WebStorm", command: "webstorm" },
   { id: "zed", label: "Zed", command: "zed" },
   { id: "finder", label: "Finder", command: "open", platforms: ["darwin"] },
   { id: "explorer", label: "Explorer", command: "explorer", platforms: ["win32"] },

packages/server/src/server/session.ts

@@ -8,6 +8,7 @@ import { homedir } from "node:os";
 import { z } from "zod";
 import type { ToolSet } from "ai";
 import {
+  isLegacyEditorTargetId,
   serializeAgentStreamEvent,
   type AgentSnapshotPayload,
   type SessionInboundMessage,
@@ -28,6 +29,7 @@ import {
   type SubscribeCheckoutDiffRequest,
   type UnsubscribeCheckoutDiffRequest,
   type DirectorySuggestionsRequest,
+  type EditorTargetDescriptorPayload,
   type EditorTargetId,
   type ProjectPlacementPayload,
   type WorkspaceDescriptorPayload,
@@ -202,13 +204,14 @@ const DEFAULT_AGENT_PROVIDER = AGENT_PROVIDER_IDS[0];
 // the entire session message if they encounter an unknown provider.
 const LEGACY_PROVIDER_IDS = new Set(["claude", "codex", "opencode"]);
 const MIN_VERSION_ALL_PROVIDERS = "0.1.45";
+const MIN_VERSION_FLEXIBLE_EDITOR_IDS = "0.1.50";
 
-function clientSupportsAllProviders(appVersion: string | null): boolean {
+function isAppVersionAtLeast(appVersion: string | null, minVersion: string): boolean {
   if (!appVersion) return false;
   // Strip RC/prerelease suffix: "0.1.45-rc.4" → "0.1.45"
   const base = appVersion.replace(/-.*$/, "");
   const parts = base.split(".").map(Number);
-  const minParts = MIN_VERSION_ALL_PROVIDERS.split(".").map(Number);
+  const minParts = minVersion.split(".").map(Number);
   for (let i = 0; i < minParts.length; i++) {
     const a = parts[i] ?? 0;
     const b = minParts[i] ?? 0;
@@ -218,6 +221,14 @@ function clientSupportsAllProviders(appVersion: string | null): boolean {
   return true;
 }
 
+function clientSupportsAllProviders(appVersion: string | null): boolean {
+  return isAppVersionAtLeast(appVersion, MIN_VERSION_ALL_PROVIDERS);
+}
+
+function clientSupportsFlexibleEditorIds(appVersion: string | null): boolean {
+  return isAppVersionAtLeast(appVersion, MIN_VERSION_FLEXIBLE_EDITOR_IDS);
+}
+
 const WORKSPACE_GIT_WATCH_DEBOUNCE_MS = 500;
 const WORKSPACE_GIT_WATCH_REMOVED_FINGERPRINT = "__removed__";
 const TERMINAL_STREAM_HIGH_WATER_BYTES = 256 * 1024;
@@ -1215,6 +1226,15 @@ export class Session {
     return LEGACY_PROVIDER_IDS.has(provider);
   }
 
+  private filterEditorsForClient(
+    editors: EditorTargetDescriptorPayload[],
+  ): EditorTargetDescriptorPayload[] {
+    if (clientSupportsFlexibleEditorIds(this.appVersion)) {
+      return editors;
+    }
+    return editors.filter((editor) => isLegacyEditorTargetId(editor.id));
+  }
+
   private matchesAgentFilter(options: {
     agent: AgentSnapshotPayload;
     project: ProjectPlacementPayload;
@@ -6095,7 +6115,7 @@ export class Session {
   }
 
   async getAvailableEditorTargets() {
-    return listAvailableEditorTargets();
+    return this.filterEditorsForClient(await listAvailableEditorTargets());
   }
 
   async openEditorTarget(options: { editorId: EditorTargetId; path: string }): Promise<void> {
@@ -7523,7 +7543,9 @@ export class Session {
         listStoredAgents: () => this.agentStorage.list(),
         listLiveAgents: () => this.agentManager.listAgents(),
         resolveAgentIdentifier: (identifier) => this.resolveAgentIdentifier(identifier),
-        sendAgentMessage: (agentId, text) => this.handleSendAgentMessage(agentId, text),
+        sendAgentMessage: async (agentId, text) => {
+          await this.handleSendAgentMessage(agentId, text);
+        },
       });
     } catch (error) {
       this.emitChatRpcError(request, error);

packages/server/src/server/session.workspaces.test.ts

@@ -61,7 +61,7 @@ function makeAgent(input: {
   };
 }
 
-function createSessionForWorkspaceTests(): Session {
+function createSessionForWorkspaceTests(options: { appVersion?: string | null } = {}): Session {
   const logger = {
     child: () => logger,
     trace: vi.fn(),
@@ -73,6 +73,7 @@ function createSessionForWorkspaceTests(): Session {
 
   const session = new Session({
     clientId: "test-client",
+    appVersion: options.appVersion ?? null,
     onMessage: vi.fn(),
     logger: logger as any,
     downloadTokenStore: {} as any,
@@ -1246,19 +1247,52 @@ describe("workspace aggregation", () => {
 
   test("list_available_editors_request returns available targets", async () => {
     const emitted: Array<{ type: string; payload: unknown }> = [];
-    const session = createSessionForWorkspaceTests() as any;
+    const session = createSessionForWorkspaceTests({ appVersion: "0.1.50" }) as any;
 
     session.emit = (message: any) => emitted.push(message);
-    session.getAvailableEditorTargets = async () => [
+    session.getAvailableEditorTargets = async () =>
-      { id: "cursor", label: "Cursor" },
+      session.filterEditorsForClient([
-      { id: "finder", label: "Finder" },
+        { id: "cursor", label: "Cursor" },
-    ];
+        { id: "webstorm", label: "WebStorm" },
+        { id: "finder", label: "Finder" },
+        { id: "unknown-editor", label: "Unknown Editor" },
+      ]);
 
     await session.handleMessage({
       type: "list_available_editors_request",
       requestId: "req-editors",
     });
 
+    const response = emitted.find(
+      (message) => message.type === "list_available_editors_response",
+    ) as any;
+    expect(response?.payload.error).toBeNull();
+    expect(response?.payload.editors).toEqual([
+      { id: "cursor", label: "Cursor" },
+      { id: "webstorm", label: "WebStorm" },
+      { id: "finder", label: "Finder" },
+      { id: "unknown-editor", label: "Unknown Editor" },
+    ]);
+  });
+
+  test("list_available_editors_request filters unsupported ids for legacy clients", async () => {
+    const emitted: Array<{ type: string; payload: unknown }> = [];
+    const session = createSessionForWorkspaceTests({ appVersion: "0.1.49" }) as any;
+
+    session.emit = (message: any) => emitted.push(message);
+    session.getAvailableEditorTargets = async () =>
+      session.filterEditorsForClient([
+        { id: "cursor", label: "Cursor" },
+        { id: "webstorm", label: "WebStorm" },
+        { id: "unknown-editor", label: "Unknown Editor" },
+        { id: "finder", label: "Finder" },
+      ]);
+
+    await session.handleMessage({
+      type: "list_available_editors_request",
+      requestId: "req-editors-legacy",
+    });
+
     const response = emitted.find(
       (message) => message.type === "list_available_editors_response",
     ) as any;

packages/server/src/shared/literal-union.ts

@@ -0,0 +1,3 @@
+// Adapted from type-fest's LiteralUnion:
+// https://github.com/sindresorhus/type-fest/blob/main/source/literal-union.d.ts
+export type LiteralUnion<T extends U, U extends string> = T | (U & Record<never, never>);

packages/server/src/shared/messages.ts

@@ -47,6 +47,7 @@ import {
   LoopLogsResponseSchema,
   LoopStopResponseSchema,
 } from "../server/loop/rpc-schemas.js";
+import type { LiteralUnion } from "./literal-union.js";
 import type {
   AgentCapabilityFlags,
   AgentModelDefinition,
@@ -1096,14 +1097,32 @@ export const CreatePaseoWorktreeRequestSchema = z.object({
   requestId: z.string(),
 });
 
-export const EditorTargetIdSchema = z.enum([
+// TODO(2026-07): Remove once most clients are on >=0.1.50 and support arbitrary editor ids.
+export const LEGACY_EDITOR_TARGET_IDS = [
   "cursor",
   "vscode",
   "zed",
   "finder",
   "explorer",
   "file-manager",
-]);
+] as const;
+
+export const KNOWN_EDITOR_TARGET_IDS = [...LEGACY_EDITOR_TARGET_IDS, "webstorm"] as const;
+
+export const KnownEditorTargetIdSchema = z.enum(KNOWN_EDITOR_TARGET_IDS);
+export const LegacyEditorTargetIdSchema = z.enum(LEGACY_EDITOR_TARGET_IDS);
+export const EditorTargetIdSchema = z.string().trim().min(1);
+
+const KNOWN_EDITOR_TARGET_ID_SET = new Set<string>(KNOWN_EDITOR_TARGET_IDS);
+const LEGACY_EDITOR_TARGET_ID_SET = new Set<string>(LEGACY_EDITOR_TARGET_IDS);
+
+export function isKnownEditorTargetId(value: string): value is KnownEditorTargetId {
+  return KNOWN_EDITOR_TARGET_ID_SET.has(value);
+}
+
+export function isLegacyEditorTargetId(value: string): value is LegacyEditorTargetId {
+  return LEGACY_EDITOR_TARGET_ID_SET.has(value);
+}
 
 export const EditorTargetDescriptorPayloadSchema = z.object({
   id: EditorTargetIdSchema,
@@ -2626,7 +2645,9 @@ export type ProjectCheckoutLitePayload = z.infer<typeof ProjectCheckoutLitePaylo
 export type ProjectPlacementPayload = z.infer<typeof ProjectPlacementPayloadSchema>;
 export type WorkspaceStateBucket = z.infer<typeof WorkspaceStateBucketSchema>;
 export type WorkspaceDescriptorPayload = z.infer<typeof WorkspaceDescriptorPayloadSchema>;
-export type EditorTargetId = z.infer<typeof EditorTargetIdSchema>;
+export type KnownEditorTargetId = z.infer<typeof KnownEditorTargetIdSchema>;
+export type LegacyEditorTargetId = z.infer<typeof LegacyEditorTargetIdSchema>;
+export type EditorTargetId = LiteralUnion<KnownEditorTargetId, string>;
 export type EditorTargetDescriptorPayload = z.infer<typeof EditorTargetDescriptorPayloadSchema>;
 export type FetchAgentsResponseMessage = z.infer<typeof FetchAgentsResponseMessageSchema>;
 export type FetchWorkspacesResponseMessage = z.infer<typeof FetchWorkspacesResponseMessageSchema>;

packages/server/src/shared/messages.workspaces.test.ts

@@ -38,6 +38,24 @@ describe("workspace message schemas", () => {
     expect(parsed.type).toBe("list_available_editors_request");
   });
 
+  test("parses open_in_editor_request with flexible editor ids", () => {
+    const knownEditor = SessionInboundMessageSchema.parse({
+      type: "open_in_editor_request",
+      requestId: "req-open-webstorm",
+      editorId: "webstorm",
+      path: "/tmp/repo",
+    });
+    const unknownEditor = SessionInboundMessageSchema.parse({
+      type: "open_in_editor_request",
+      requestId: "req-open-custom",
+      editorId: "unknown-editor",
+      path: "/tmp/repo",
+    });
+
+    expect(knownEditor.type).toBe("open_in_editor_request");
+    expect(unknownEditor.type).toBe("open_in_editor_request");
+  });
+
   test("parses open_in_editor_response", () => {
     const parsed = SessionOutboundMessageSchema.parse({
       type: "open_in_editor_response",
@@ -50,6 +68,33 @@ describe("workspace message schemas", () => {
     expect(parsed.type).toBe("open_in_editor_response");
   });
 
+  test("parses list_available_editors_response with unknown editor ids", () => {
+    const parsed = SessionOutboundMessageSchema.parse({
+      type: "list_available_editors_response",
+      payload: {
+        requestId: "req-editors",
+        editors: [
+          { id: "cursor", label: "Cursor" },
+          { id: "unknown-editor", label: "Unknown Editor" },
+        ],
+        error: null,
+      },
+    });
+
+    expect(parsed.type).toBe("list_available_editors_response");
+  });
+
+  test("rejects empty editor ids", () => {
+    const result = SessionInboundMessageSchema.safeParse({
+      type: "open_in_editor_request",
+      requestId: "req-open-empty",
+      editorId: "",
+      path: "/tmp/repo",
+    });
+
+    expect(result.success).toBe(false);
+  });
+
   test("rejects invalid workspace update payload", () => {
     const result = SessionOutboundMessageSchema.safeParse({
       type: "workspace_update",