fix(cron): force fresh isolated session IDs

CHANGELOG.md

@@ -41,6 +41,7 @@ Docs: https://docs.openclaw.ai
 - Plugins/Discovery: ignore scanned extension backup/disabled directory patterns (for example `.backup-*`, `.bak`, `.disabled*`) and move updater backup directories under `.openclaw-install-backups`, preventing duplicate plugin-id collisions from archived copies.
 - Dev tooling: prevent `CLAUDE.md` symlink target regressions by excluding CLAUDE symlink sentinels from `oxfmt` and marking them `-text` in `.gitattributes`, so formatter/EOL normalization cannot reintroduce trailing-newline targets. Thanks @vincentkoc.
 - Cron: honor `cron.maxConcurrentRuns` in the timer loop so due jobs can execute up to the configured parallelism instead of always running serially. (#11595) Thanks @Takhoffman.
+- Cron/Isolation: force fresh session IDs for isolated cron runs so `sessionTarget="isolated"` executions never reuse prior run context. (#23470) Thanks @echoVic.
 - Agents/Compaction: restore embedded compaction safeguard/context-pruning extension loading in production by wiring bundled extension factories into the resource loader instead of runtime file-path resolution. (#22349) Thanks @Glucksberg.
 - Feishu/Media: for inbound video messages that include both `file_key` (video) and `image_key` (thumbnail), prefer `file_key` when downloading media so video attachments are saved instead of silently failing on thumbnail keys. (#23633)
 - Hooks/Cron: suppress duplicate main-session events for delivered hook turns and mark `SILENT_REPLY_TOKEN` (`NO_REPLY`) early exits as delivered to prevent hook context pollution. (#20678) Thanks @JonathanWorks.

src/cron/isolated-agent/run.skill-filter.test.ts

@@ -327,6 +327,16 @@ describe("runCronIsolatedAgentTurn — skill filter", () => {
     ]);
   });
 
+  it("forces a fresh session for isolated cron runs", async () => {
+    const result = await runCronIsolatedAgentTurn(makeParams());
+
+    expect(result.status).toBe("ok");
+    expect(resolveCronSessionMock).toHaveBeenCalledOnce();
+    expect(resolveCronSessionMock.mock.calls[0]?.[0]).toMatchObject({
+      forceNew: true,
+    });
+  });
+
   it("reuses cached snapshot when version and normalized skillFilter are unchanged", async () => {
     resolveAgentSkillsFilterMock.mockReturnValue([" weather ", "meme-factory", "weather"]);
     resolveCronSessionMock.mockReturnValue({

src/cron/isolated-agent/run.ts

@@ -270,6 +270,8 @@ export async function runCronIsolatedAgentTurn(params: {
     sessionKey: agentSessionKey,
     agentId,
     nowMs: now,
+    // Isolated cron runs must not carry prior turn context across executions.
+    forceNew: params.job.sessionTarget === "isolated",
   });
   const runSessionId = cronSession.sessionEntry.sessionId;
   const runSessionKey = baseSessionKey.startsWith("cron:")