fix(cron): pass agentDir into embedded follow-up runs

Co-authored-by: seilk <88271769+seilk@users.noreply.github.com>

src/cron/isolated-agent.uses-last-non-empty-agent-text-as.test.ts

@@ -185,6 +185,20 @@ describe("runCronIsolatedAgentTurn", () => {
     });
   });
 
+  it("passes resolved agentDir to runEmbeddedPiAgent", async () => {
+    await withTempHome(async (home) => {
+      const { res } = await runCronTurn(home, {
+        jobPayload: DEFAULT_AGENT_TURN_PAYLOAD,
+      });
+
+      expect(res.status).toBe("ok");
+      const call = vi.mocked(runEmbeddedPiAgent).mock.calls.at(-1)?.[0] as {
+        agentDir?: string;
+      };
+      expect(call?.agentDir).toBe(path.join(home, ".openclaw", "agents", "main", "agent"));
+    });
+  });
+
   it("appends current time after the cron header line", async () => {
     await withTempHome(async (home) => {
       await runCronTurn(home, {

src/cron/isolated-agent/run.ts

@@ -501,6 +501,7 @@ export async function runCronIsolatedAgentTurn(params: {
           messageChannel,
           agentAccountId: resolvedDelivery.accountId,
           sessionFile,
+          agentDir,
           workspaceDir,
           config: cfgWithAgentDefaults,
           skillsSnapshot,