fix(heartbeat): run when HEARTBEAT.md is missing

docs/automation/troubleshooting.md

@@ -90,7 +90,6 @@ Common signatures:
 - `heartbeat skipped` with `reason=quiet-hours` → outside `activeHours`.
 - `requests-in-flight` → main lane busy; heartbeat deferred.
 - `empty-heartbeat-file` → interval heartbeat skipped because `HEARTBEAT.md` has no actionable content and no tagged cron event is queued.
-- `no-heartbeat-file` → interval heartbeat skipped because `HEARTBEAT.md` is missing and no tagged cron event is queued.
 - `alerts-disabled` → visibility settings suppress outbound heartbeat messages.
 
 ## Timezone and activeHours gotchas

src/infra/heartbeat-runner.returns-default-unset.test.ts

@@ -1372,7 +1372,7 @@ describe("runHeartbeatOnce", () => {
     }
   });
 
-  it("skips heartbeat when HEARTBEAT.md does not exist (saves API calls)", async () => {
+  it("runs heartbeat when HEARTBEAT.md does not exist", async () => {
     const tmpDir = await createCaseDir("openclaw-hb");
     const storePath = path.join(tmpDir, "sessions.json");
     const workspaceDir = path.join(tmpDir, "workspace");
@@ -1409,7 +1409,7 @@ describe("runHeartbeatOnce", () => {
         ),
       );
 
-      replySpy.mockResolvedValue({ text: "HEARTBEAT_OK" });
+      replySpy.mockResolvedValue({ text: "Checked logs and PRs" });
       const sendWhatsApp = vi.fn().mockResolvedValue({
         messageId: "m1",
         toJid: "jid",
@@ -1426,13 +1426,74 @@ describe("runHeartbeatOnce", () => {
         },
       });
 
-      // Should skip - no HEARTBEAT.md means nothing actionable
-      expect(res.status).toBe("skipped");
-      if (res.status === "skipped") {
-        expect(res.reason).toBe("no-heartbeat-file");
-      }
-      expect(replySpy).not.toHaveBeenCalled();
-      expect(sendWhatsApp).not.toHaveBeenCalled();
+      // Missing HEARTBEAT.md should still run so prompt/system instructions can drive work.
+      expect(res.status).toBe("ran");
+      expect(replySpy).toHaveBeenCalled();
+      expect(sendWhatsApp).toHaveBeenCalledTimes(1);
+    } finally {
+      replySpy.mockRestore();
+    }
+  });
+
+  it("runs heartbeat when HEARTBEAT.md read fails with a non-ENOENT error", async () => {
+    const tmpDir = await createCaseDir("openclaw-hb");
+    const storePath = path.join(tmpDir, "sessions.json");
+    const workspaceDir = path.join(tmpDir, "workspace");
+    const replySpy = vi.spyOn(replyModule, "getReplyFromConfig");
+    try {
+      await fs.mkdir(workspaceDir, { recursive: true });
+      // Simulate a read failure path (readFile on a directory returns EISDIR).
+      await fs.mkdir(path.join(workspaceDir, "HEARTBEAT.md"), { recursive: true });
+
+      const cfg: OpenClawConfig = {
+        agents: {
+          defaults: {
+            workspace: workspaceDir,
+            heartbeat: { every: "5m", target: "whatsapp" },
+          },
+        },
+        channels: { whatsapp: { allowFrom: ["*"] } },
+        session: { store: storePath },
+      };
+      const sessionKey = resolveMainSessionKey(cfg);
+
+      await fs.writeFile(
+        storePath,
+        JSON.stringify(
+          {
+            [sessionKey]: {
+              sessionId: "sid",
+              updatedAt: Date.now(),
+              lastChannel: "whatsapp",
+              lastTo: "+1555",
+            },
+          },
+          null,
+          2,
+        ),
+      );
+
+      replySpy.mockResolvedValue({ text: "Checked logs and PRs" });
+      const sendWhatsApp = vi.fn().mockResolvedValue({
+        messageId: "m1",
+        toJid: "jid",
+      });
+
+      const res = await runHeartbeatOnce({
+        cfg,
+        deps: {
+          sendWhatsApp,
+          getQueueSize: () => 0,
+          nowMs: () => 0,
+          webAuthExists: async () => true,
+          hasActiveWebListener: () => true,
+        },
+      });
+
+      // Read errors other than ENOENT should not disable heartbeat runs.
+      expect(res.status).toBe("ran");
+      expect(replySpy).toHaveBeenCalled();
+      expect(sendWhatsApp).toHaveBeenCalledTimes(1);
     } finally {
       replySpy.mockRestore();
     }

src/infra/heartbeat-runner.ts

@@ -41,7 +41,7 @@ import { CommandLane } from "../process/lanes.js";
 import { normalizeAgentId, toAgentStoreSessionKey } from "../routing/session-key.js";
 import { defaultRuntime, type RuntimeEnv } from "../runtime.js";
 import { escapeRegExp } from "../utils.js";
-import { formatErrorMessage } from "./errors.js";
+import { formatErrorMessage, hasErrnoCode } from "./errors.js";
 import { isWithinActiveHours } from "./heartbeat-active-hours.js";
 import {
   buildCronEventPrompt,
@@ -481,7 +481,7 @@ type HeartbeatReasonFlags = {
   isWakeReason: boolean;
 };
 
-type HeartbeatSkipReason = "empty-heartbeat-file" | "no-heartbeat-file";
+type HeartbeatSkipReason = "empty-heartbeat-file";
 
 type HeartbeatPreflight = HeartbeatReasonFlags & {
   session: ReturnType<typeof resolveHeartbeatSession>;
@@ -525,42 +525,39 @@ async function resolveHeartbeatPreflight(params: {
     reasonFlags.isCronEventReason ||
     reasonFlags.isWakeReason ||
     hasTaggedCronEvents;
-
-  const workspaceDir = resolveAgentWorkspaceDir(params.cfg, params.agentId);
-  const heartbeatFilePath = path.join(workspaceDir, DEFAULT_HEARTBEAT_FILENAME);
-  try {
-    const heartbeatFileContent = await fs.readFile(heartbeatFilePath, "utf-8");
-    if (isHeartbeatContentEffectivelyEmpty(heartbeatFileContent) && !shouldBypassFileGates) {
-      return {
-        ...reasonFlags,
-        session,
-        pendingEventEntries,
-        hasTaggedCronEvents,
-        shouldInspectPendingEvents,
-        skipReason: "empty-heartbeat-file",
-      };
-    }
-  } catch (err: unknown) {
-    if ((err as NodeJS.ErrnoException)?.code === "ENOENT" && !shouldBypassFileGates) {
-      return {
-        ...reasonFlags,
-        session,
-        pendingEventEntries,
-        hasTaggedCronEvents,
-        shouldInspectPendingEvents,
-        skipReason: "no-heartbeat-file",
-      };
-    }
-    // For other read errors, proceed with heartbeat as before.
-  }
-
-  return {
+  const basePreflight = {
     ...reasonFlags,
     session,
     pendingEventEntries,
     hasTaggedCronEvents,
     shouldInspectPendingEvents,
-  };
+  } satisfies Omit<HeartbeatPreflight, "skipReason">;
+
+  if (shouldBypassFileGates) {
+    return basePreflight;
+  }
+
+  const workspaceDir = resolveAgentWorkspaceDir(params.cfg, params.agentId);
+  const heartbeatFilePath = path.join(workspaceDir, DEFAULT_HEARTBEAT_FILENAME);
+  try {
+    const heartbeatFileContent = await fs.readFile(heartbeatFilePath, "utf-8");
+    if (isHeartbeatContentEffectivelyEmpty(heartbeatFileContent)) {
+      return {
+        ...basePreflight,
+        skipReason: "empty-heartbeat-file",
+      };
+    }
+  } catch (err: unknown) {
+    if (hasErrnoCode(err, "ENOENT")) {
+      // Missing HEARTBEAT.md is intentional in some setups (for example, when
+      // heartbeat instructions live outside the file), so keep the run active.
+      // The heartbeat prompt already says "if it exists".
+      return basePreflight;
+    }
+    // For other read errors, proceed with heartbeat as before.
+  }
+
+  return basePreflight;
 }
 
 export async function runHeartbeatOnce(opts: {