fix(engine): wire TaskStore into runtime AgentStore so heartbeat auto-claim works

The InProcessRuntime constructed its AgentStore with only `rootDir`, leaving
task-claim/checkout/release operations unconfigured. As a result, the
heartbeat auto-claim scan logged "TaskStore not configured for task-claim
operations" whenever a relevant todo was found. Pass the runtime's TaskStore
through to the AgentStore so claimTaskForAgent succeeds.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.changeset/heartbeat-auto-claim-taskstore.md

@@ -0,0 +1,10 @@
+---
+"@runfusion/fusion": patch
+---
+
+Wire `TaskStore` into the runtime's `AgentStore` so the heartbeat auto-claim
+path can call `claimTaskForAgent` without warning
+`TaskStore not configured for task-claim operations`. The `InProcessRuntime`
+previously built its `AgentStore` with only `rootDir`, which left task-claim,
+checkout, and release operations unconfigured even though the runtime had a
+`TaskStore` available.

packages/engine/src/runtimes/__tests__/in-process-runtime.test.ts

@@ -55,6 +55,11 @@ vi.mock("@fusion/core", async () => {
       self.init = vi.fn().mockResolvedValue(undefined);
       self.listTasks = vi.fn().mockResolvedValue([]);
       self.getTask = mockTaskStoreGetTask;
+      // AgentStore now receives this TaskStore (passed from the runtime),
+      // so methods it calls during assign/claim/checkout flows must exist.
+      self.logEntry = vi.fn().mockResolvedValue(undefined);
+      self.updateTask = vi.fn().mockImplementation(async (taskId: string, patch: Record<string, unknown>) => ({ id: taskId, ...patch }));
+      self.moveTask = vi.fn().mockResolvedValue(undefined);
       self.getSettings = vi.fn().mockImplementation(async () => structuredClone(mockTaskStoreSettings));
       self.getMissionStore = vi.fn().mockReturnValue({
         listMissions: vi.fn().mockReturnValue([]),
@@ -475,6 +480,26 @@ describe("InProcessRuntime", () => {
       expect(monitor).toBeDefined();
     }, 30000);
 
+    // Regression: heartbeat auto-claim path was warning
+    // "TaskStore not configured for task-claim operations" because the
+    // runtime built its AgentStore without passing taskStore through.
+    it("wires AgentStore with TaskStore so claimTaskForAgent does not throw", async () => {
+      await runtime.start();
+      const store = getAgentStore(runtime);
+      const agent = await store.createAgent({
+        name: "claim-wiring",
+        role: "executor",
+        metadata: { agentKind: "task-worker" },
+        runtimeConfig: { enabled: false },
+      });
+      // taskStore.getTask is mocked to return null in this suite, so we
+      // expect the guarded "task_not_found" path rather than the
+      // unconfigured-taskStore throw.
+      mockTaskStoreGetTask.mockResolvedValueOnce(null);
+      const result = await store.claimTaskForAgent(agent.id, "FN-DOES-NOT-EXIST");
+      expect(result).toEqual({ ok: false, reason: "task_not_found" });
+    }, 30000);
+
     it("should return TriggerScheduler after start", async () => {
       await runtime.start();
       const triggerScheduler = runtime.getTriggerScheduler();

packages/engine/src/runtimes/in-process-runtime.ts

@@ -321,7 +321,7 @@ export class InProcessRuntime
       let agentStoreForReflection: import("@fusion/core").AgentStore | undefined;
       try {
         const { AgentStore: AgentStoreClass } = await import("@fusion/core");
-        agentStoreForReflection = new AgentStoreClass({ rootDir: this.taskStore.getFusionDir() });
+        agentStoreForReflection = new AgentStoreClass({ rootDir: this.taskStore.getFusionDir(), taskStore: this.taskStore });
         await agentStoreForReflection.init();
         runtimeLog.log("AgentStore initialized for reflection service");
       } catch (agentErr) {