feat(FN-2081): merge fusion/fn-2081

packages/engine/src/agent-heartbeat.test.ts

@@ -1376,8 +1376,9 @@ describe("HeartbeatMonitor", () => {
         expect(systemPrompt).not.toContain("task_log");
         expect(systemPrompt).not.toContain("task_document_write");
         expect(systemPrompt).not.toContain("task_document_read");
+        expect(systemPrompt).not.toContain("Task Documents:");
         expect(systemPrompt).toContain("task_create");
-        expect(systemPrompt).toContain("heartbeat_done");
+        expect(systemPrompt).toContain("memory_append");
 
         // The execution prompt is passed to session.prompt by promptWithFallback mock
         const promptCalls = mockSession.prompt.mock.calls;
@@ -1396,6 +1397,24 @@ describe("HeartbeatMonitor", () => {
         expect(executionPrompt).not.toContain("Task description:");
       });
 
+      it("task-scoped heartbeat run receives full system prompt with task_log and task Documents", async () => {
+        const store = createStoreWithAgentForExec({ taskId: "FN-001" });
+        const mockSession = createMockAgentSession();
+        mockedCreateKbAgent.mockResolvedValue({ session: mockSession as any });
+
+        const monitor = new HeartbeatMonitor({ store, taskStore: mockTaskStore, rootDir: "/tmp" });
+
+        await monitor.executeHeartbeat({ agentId: "agent-001", source: "timer" });
+
+        expect(mockedCreateKbAgent).toHaveBeenCalledOnce();
+        const callArgs = mockedCreateKbAgent.mock.calls[0]![0]!;
+        const systemPrompt = callArgs.systemPrompt;
+
+        expect(systemPrompt).toContain("task_log");
+        expect(systemPrompt).toContain("task_document_write");
+        expect(systemPrompt).toContain("Task Documents:");
+      });
+
       it("identity agent without task gets soul in system prompt", async () => {
         const store = createStoreWithAgentForExec({ taskId: undefined, soul: "I am a CEO who prioritizes high-impact work" });
         const mockSession = createMockAgentSession();

packages/engine/src/agent-heartbeat.ts

@@ -169,14 +169,12 @@ When sending messages:
 export const HEARTBEAT_NO_TASK_SYSTEM_PROMPT = `You are a heartbeat agent running in a short execution window.
 
 Your job:
-1. Do ONE useful action: analyze, review, create follow-up tasks, or communicate findings.
-2. Use task_create to spawn follow-up work as needed.
-3. Use send_message and read_messages to process inter-agent communication.
-4. Use memory_search and memory_append to leverage and persist useful memory context.
-5. Call heartbeat_done when finished with an optional summary of what was accomplished.
+1. Do ONE useful action: analyze, review, create follow-up tasks, or log findings.
+2. Use task_create to spawn follow-up work.
+3. Call heartbeat_done when finished with an optional summary of what was accomplished.
 
 Keep work lightweight — this is a single-pass check, not a full implementation run.
-You have readonly file access plus task_create, list_agents, delegate_task, memory_search, memory_append, send_message, read_messages, and heartbeat_done tools.
+You have readonly file access plus task_create, list_agents, delegate_task, messaging, and memory tools (memory_search, memory_get, memory_append).
 
 ## Memory Boundaries
 
@@ -191,7 +189,7 @@ When you are woken by an incoming message (source includes "wake-on-message"), y
 1. Use read_messages to check your inbox for unread messages.
 2. Review each message and determine the appropriate action:
    - If the message requires a response, use send_message to reply.
-   - If the message is informational, acknowledge it with a brief response via send_message.
+   - If the message is informational, acknowledge it briefly and move on.
    - If the message requests work, create a follow-up task with task_create or handle it directly.
 3. After processing messages, continue with your normal heartbeat duties.
 
@@ -1121,6 +1119,7 @@ export class HeartbeatMonitor {
             [agentInstructions, memoryInstructions].filter((part) => part.trim()).join("\n\n"),
           );
         } catch (instructionError) {
+          systemPrompt = baseHeartbeatSystemPrompt;
           const message = instructionError instanceof Error ? instructionError.message : String(instructionError);
           heartbeatLog.warn(`Failed to enrich heartbeat system prompt for ${agentId}: ${message}`);
         }