FN-5851: fix goal tool store resolution

Resolve goal tool lookups to the canonical project store from Fusion worktree directories.

- recognize both legacy .worktrees and .fusion/worktrees paths when resolving the project root for pi extensions
- add CLI coverage proving fn_goal_list and fn_goal_show return dashboard-created goals from a Fusion worktree cwd
- extend core worktree-resolution tests and keep the branch conflict recovery test worktree path isolated in tmpdir
- add a patch changeset for the published CLI fix

Files changed:
 .changeset/fn-5851-goal-store-resolution.md        |   5 +
 packages/cli/src/__tests__/goal-store-resolution.test.ts    | 104 +++++++++++++++++++++
 packages/core/src/__tests__/pi-extensions.test.ts  |  14 ++-
 packages/core/src/pi-extensions.ts                 |  12 ++-
 packages/engine/src/__tests__/branch-conflicts-recovery.test.ts    |   2 +-
 5 files changed, 130 insertions(+), 7 deletions(-)

Fusion-Task-Id: FN-5851

Fusion-Task-Lineage: ec4c8239-b953-4df7-9f72-02e17e4b0851

.changeset/fn-5851-goal-store-resolution.md

@@ -0,0 +1,5 @@
+---
+"@runfusion/fusion": patch
+---
+
+Fix `fn_goal_list` and `fn_goal_show` so tool calls made from Fusion worktree directories resolve the canonical project database and return goals created through the dashboard UI.

packages/cli/src/__tests__/goal-store-resolution.test.ts

@@ -0,0 +1,104 @@
+import { afterEach, beforeEach, describe, expect, it } from "vitest";
+import { mkdtemp, mkdir, rm } from "node:fs/promises";
+import { join } from "node:path";
+import { tmpdir } from "node:os";
+import { TaskStore, getProjectRootFromWorktree } from "@fusion/core";
+import kbExtension from "../extension.js";
+
+interface RegisteredTool {
+  name: string;
+  execute: (
+    toolCallId: string,
+    params: any,
+    signal: AbortSignal | undefined,
+    onUpdate: ((update: any) => void) | undefined,
+    ctx: any,
+  ) => Promise<any>;
+}
+
+function createMockAPI() {
+  const tools = new Map<string, RegisteredTool>();
+  return {
+    registerTool(def: RegisteredTool) {
+      tools.set(def.name, def);
+    },
+    registerCommand() {},
+    registerShortcut() {},
+    registerFlag() {},
+    on() {},
+    tools,
+  } as any;
+}
+
+describe("extension goal tools store resolution", () => {
+  let rootDir: string;
+  let worktreeCwd: string;
+
+  beforeEach(async () => {
+    rootDir = await mkdtemp(join(tmpdir(), "kb-goal-resolution-"));
+    await mkdir(join(rootDir, ".fusion"), { recursive: true });
+
+    const worktreeRoot = join(rootDir, ".fusion", "worktrees", "FN-5851");
+    await mkdir(join(worktreeRoot, ".fusion"), { recursive: true });
+    worktreeCwd = join(worktreeRoot, "packages", "cli");
+    await mkdir(worktreeCwd, { recursive: true });
+  });
+
+  afterEach(async () => {
+    await rm(rootDir, { recursive: true, force: true });
+  });
+
+  it("returns canonical project goals when invoked from a .fusion/worktrees cwd", async () => {
+    expect(getProjectRootFromWorktree(worktreeCwd)).toBe(rootDir);
+
+    const store = new TaskStore(rootDir);
+    await store.init();
+    const goal = store.getGoalStore().createGoal({
+      title: "Canonical goal",
+      description: "Created in the project root store",
+    });
+
+    const api = createMockAPI();
+    kbExtension(api);
+    const listTool = api.tools.get("fn_goal_list");
+    const showTool = api.tools.get("fn_goal_show");
+    expect(listTool).toBeDefined();
+    expect(showTool).toBeDefined();
+
+    const listResult = await listTool!.execute(
+      "goal-list-worktree",
+      { status: "active" },
+      undefined,
+      undefined,
+      { cwd: worktreeCwd },
+    );
+
+    expect(listResult.isError).toBeUndefined();
+    expect(listResult.details.goals).toEqual([
+      expect.objectContaining({
+        id: goal.id,
+        title: "Canonical goal",
+        description: "Created in the project root store",
+        status: "active",
+      }),
+    ]);
+
+    const showResult = await showTool!.execute(
+      "goal-show-worktree",
+      { id: goal.id },
+      undefined,
+      undefined,
+      { cwd: worktreeCwd },
+    );
+
+    expect(showResult.isError).toBeUndefined();
+    expect(showResult.details.goal).toMatchObject({
+      id: goal.id,
+      title: "Canonical goal",
+      description: "Created in the project root store",
+      status: "active",
+    });
+
+    store.close();
+  });
+});

packages/core/src/__tests__/pi-extensions.test.ts

@@ -8,11 +8,15 @@ describe("getProjectRootFromWorktree", () => {
   it("detects POSIX worktree paths", () => {
     expect(getProjectRootFromWorktree("/repo/.worktrees/fn-001")).toBe("/repo");
     expect(getProjectRootFromWorktree("/repo/.worktrees/fn-001/src/file.ts")).toBe("/repo");
+    expect(getProjectRootFromWorktree("/repo/.fusion/worktrees/fn-001")).toBe("/repo");
+    expect(getProjectRootFromWorktree("/repo/.fusion/worktrees/fn-001/src/file.ts")).toBe("/repo");
   });
 
   it("detects Windows worktree paths", () => {
     expect(getProjectRootFromWorktree("C:\\repo\\.worktrees\\fn-001")).toBe("C:\\repo");
     expect(getProjectRootFromWorktree("C:\\repo\\.worktrees\\fn-001\\src\\file.ts")).toBe("C:\\repo");
+    expect(getProjectRootFromWorktree("C:\\repo\\.fusion\\worktrees\\fn-001")).toBe("C:\\repo");
+    expect(getProjectRootFromWorktree("C:\\repo\\.fusion\\worktrees\\fn-001\\src\\file.ts")).toBe("C:\\repo");
   });
 
   it("supports configured candidate worktrees dir paths", () => {
@@ -43,10 +47,14 @@ describe("resolvePiExtensionProjectRoot", () => {
     try {
       mkdirSync(join(root, ".fusion"), { recursive: true });
       mkdirSync(join(root, ".worktrees", "feature", ".fusion"), { recursive: true });
-      const cwd = join(root, ".worktrees", "feature", "sub");
-      mkdirSync(cwd, { recursive: true });
+      mkdirSync(join(root, ".fusion", "worktrees", "feature", ".fusion"), { recursive: true });
+      const legacyCwd = join(root, ".worktrees", "feature", "sub");
+      const fusionCwd = join(root, ".fusion", "worktrees", "feature", "sub");
+      mkdirSync(legacyCwd, { recursive: true });
+      mkdirSync(fusionCwd, { recursive: true });
 
-      expect(resolvePiExtensionProjectRoot(cwd)).toBe(root);
+      expect(resolvePiExtensionProjectRoot(legacyCwd)).toBe(root);
+      expect(resolvePiExtensionProjectRoot(fusionCwd)).toBe(root);
     } finally {
       rmSync(root, { recursive: true, force: true });
     }

packages/core/src/pi-extensions.ts

@@ -40,9 +40,15 @@ export function getProjectRootFromWorktree(
   cwd: string,
   opts?: { worktreesDirCandidates?: string[] },
 ): string | null {
-  const legacyMatch = cwd.match(/^(.+?)[\\/]\.worktrees[\\/][^\\/]+(?:[\\/]|$)/);
-  if (legacyMatch) {
-    return legacyMatch[1]!;
+  const knownWorktreePatterns = [
+    /^(.+?)[\\/]\.worktrees[\\/][^\\/]+(?:[\\/]|$)/,
+    /^(.+?)[\\/]\.fusion[\\/]worktrees[\\/][^\\/]+(?:[\\/]|$)/,
+  ];
+  for (const pattern of knownWorktreePatterns) {
+    const match = cwd.match(pattern);
+    if (match) {
+      return match[1]!;
+    }
   }
 
   for (const candidate of opts?.worktreesDirCandidates ?? []) {

packages/engine/src/__tests__/branch-conflicts-recovery.test.ts

@@ -232,7 +232,7 @@ describe("branch contamination recovery classification", () => {
 
   it("reanchors without checkout -B when detached worktree is already at base on bound branch", async () => {
     const { repoDir, baseSha } = await setupRepo();
-    const secondaryWorktree = path.join(repoDir, "../feature-secondary");
+    const secondaryWorktree = path.join(tmpdir(), `${path.basename(repoDir)}-feature-secondary`);
     await run(`git worktree add --detach ${JSON.stringify(secondaryWorktree)} ${baseSha}`, repoDir);
     dirs.push(secondaryWorktree);