diff --git a/src/agents/openclaw-tools.subagents.sessions-spawn.cron-note.test.ts b/src/agents/openclaw-tools.subagents.sessions-spawn.cron-note.test.ts
index 789ff410d..6e25419cf 100644
--- a/src/agents/openclaw-tools.subagents.sessions-spawn.cron-note.test.ts
+++ b/src/agents/openclaw-tools.subagents.sessions-spawn.cron-note.test.ts
@@ -42,14 +42,16 @@ describe("sessions_spawn: cron isolated session note suppression", () => {
     expect(details.status).toBe("accepted");
   });
 
-  it("suppresses ACCEPTED_NOTE for any agent with :cron: in session key", async () => {
+  it("does not suppress ACCEPTED_NOTE for non-canonical cron-like keys", async () => {
     setupSessionsSpawnGatewayMock({});
-    // Ensure the check uses includes(":cron:") not startsWith("cron:")
     const tool = await getSessionsSpawnTool({
-      agentSessionKey: "agent:marian-job-search:cron:a7c7874a:run:abc123",
+      agentSessionKey: "agent:main:slack:cron:job:run:uuid",
     });
-    const result = await tool.execute("call-other-agent-cron", { task: "test task", mode: "run" });
-    expect((result.details as SpawnResult).note).toBeUndefined();
+    const result = await tool.execute("call-cron-like-noncanonical", {
+      task: "test task",
+      mode: "run",
+    });
+    expect((result.details as SpawnResult).note).toBe(SUBAGENT_SPAWN_ACCEPTED_NOTE);
   });
 
   it("does not suppress note when agentSessionKey is undefined", async () => {
diff --git a/src/agents/subagent-spawn.ts b/src/agents/subagent-spawn.ts
index c3773c46f..9624d09ae 100644
--- a/src/agents/subagent-spawn.ts
+++ b/src/agents/subagent-spawn.ts
@@ -4,7 +4,11 @@ import { DEFAULT_SUBAGENT_MAX_SPAWN_DEPTH } from "../config/agent-limits.js";
 import { loadConfig } from "../config/config.js";
 import { callGateway } from "../gateway/call.js";
 import { getGlobalHookRunner } from "../plugins/hook-runner-global.js";
-import { normalizeAgentId, parseAgentSessionKey } from "../routing/session-key.js";
+import {
+  isCronSessionKey,
+  normalizeAgentId,
+  parseAgentSessionKey,
+} from "../routing/session-key.js";
 import { normalizeDeliveryContext } from "../utils/delivery-context.js";
 import { resolveAgentConfig } from "./agent-scope.js";
 import { AGENT_LANE_SUBAGENT } from "./lanes.js";
@@ -527,7 +531,7 @@ export async function spawnSubagentDirect(
   // Check if we're in a cron isolated session - don't add "do not poll" note
   // because cron sessions end immediately after the agent produces a response,
   // so the agent needs to wait for subagent results to keep the turn alive.
-  const isCronSession = ctx.agentSessionKey?.includes(":cron:");
+  const isCronSession = isCronSessionKey(ctx.agentSessionKey);
   const note =
     spawnMode === "session"
       ? SUBAGENT_SPAWN_SESSION_ACCEPTED_NOTE