diff --git a/CHANGELOG.md b/CHANGELOG.md
index 71a79f0ebf5..46ef242a058 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -139,6 +139,8 @@ Docs: https://docs.openclaw.ai
 - ACP/oneshot: reconcile runtime session identity before closing completed
   oneshot ACP runs, so finished `sessions.json` entries do not stay stuck with
   `acp.identity.state="pending"`.
+- ACPX: bundle `acpx@0.6.1` so unsupported generic model overrides fail
+  clearly instead of silently falling back to the target adapter default.
 - ACP/models: document that non-Codex ACP model overrides require adapter
   support for ACP `models` plus `session/set_model`, so unsupported harnesses
   fail clearly instead of silently falling back to their defaults.
diff --git a/extensions/acpx/package.json b/extensions/acpx/package.json
index a23f2a7ff75..c33100ad2a2 100644
--- a/extensions/acpx/package.json
+++ b/extensions/acpx/package.json
@@ -4,7 +4,7 @@
   "description": "OpenClaw ACP runtime backend",
   "type": "module",
   "dependencies": {
-    "acpx": "0.6.0"
+    "acpx": "0.6.1"
   },
   "devDependencies": {
     "@openclaw/plugin-sdk": "workspace:*"
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 9bf90ab0431..ec4c8085a74 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -215,8 +215,8 @@ importers:
   extensions/acpx:
     dependencies:
       acpx:
-        specifier: 0.6.0
-        version: 0.6.0
+        specifier: 0.6.1
+        version: 0.6.1
     devDependencies:
       '@openclaw/plugin-sdk':
         specifier: workspace:*
@@ -4233,8 +4233,8 @@ packages:
     engines: {node: '>=0.4.0'}
     hasBin: true
 
-  acpx@0.6.0:
-    resolution: {integrity: sha512-ThJ2NLLc3kos3MzC8yrPrJeIfpRuwp2+/aMRkfKfJ0cATSbkV25NEi93d0Vx9f2NIpSEhr+mGQpbvphBrrSRPA==}
+  acpx@0.6.1:
+    resolution: {integrity: sha512-qxZPbm3SKq0UqQ0sOJ0M4iTLkF9AR7+I+JE/L/UeMUU1vW5N4nUVkZHytoHTBAu7nrej6THNzCPgrIZfv9T3AA==}
     engines: {node: '>=22.12.0'}
     hasBin: true
 
@@ -10886,7 +10886,7 @@ snapshots:
 
   acorn@8.16.0: {}
 
-  acpx@0.6.0:
+  acpx@0.6.1:
     dependencies:
       '@agentclientprotocol/sdk': 0.20.0(zod@4.3.6)
       commander: 14.0.3
diff --git a/src/gateway/live-agent-probes.test.ts b/src/gateway/live-agent-probes.test.ts
index 6bda311c3ff..ca7bcb8a928 100644
--- a/src/gateway/live-agent-probes.test.ts
+++ b/src/gateway/live-agent-probes.test.ts
@@ -40,7 +40,7 @@ describe("live-agent-probes", () => {
         attempt: 1,
         exactReply: spec.name,
       }),
-    ).toContain("openclaw-tools/cron");
+    ).toContain("Preserve job.sessionTarget and job.sessionKey exactly as provided.");
     expect(
       buildLiveCronProbeMessage({
         agent: "future-agent",
diff --git a/src/gateway/live-agent-probes.ts b/src/gateway/live-agent-probes.ts
index e4e45586e34..1316f76f3a5 100644
--- a/src/gateway/live-agent-probes.ts
+++ b/src/gateway/live-agent-probes.ts
@@ -75,6 +75,7 @@ export function buildLiveCronProbeMessage(params: {
     return (
       "Use the OpenClaw MCP tool `openclaw-tools/cron` (server `openclaw-tools`, tool `cron`). " +
       `Call it with JSON arguments ${params.argsJson}. ` +
+      "Preserve the JSON exactly, including job.sessionTarget and job.sessionKey; do not omit, rename, or flatten those fields. " +
       "Do the actual tool call; I will verify externally with the OpenClaw cron CLI. " +
       `After the cron job is created, reply exactly: ${params.exactReply}`
     );
@@ -83,6 +84,7 @@ export function buildLiveCronProbeMessage(params: {
     return (
       "Retry the OpenClaw MCP tool `openclaw-tools/cron` now. " +
       `Use these exact JSON arguments: ${params.argsJson}. ` +
+      "Preserve job.sessionTarget and job.sessionKey exactly as provided. " +
       `If the cron job is created, reply exactly: ${params.exactReply}. ` +
       "If the tool call is cancelled, the job is not created, or you cannot confirm creation, " +
       "reply briefly saying that and ask me to retry. No markdown. " +
@@ -93,6 +95,7 @@ export function buildLiveCronProbeMessage(params: {
     "Your previous OpenClaw cron MCP tool call was cancelled before the job was created. " +
     "Retry the OpenClaw MCP tool `openclaw-tools/cron` now. " +
     `Use these exact JSON arguments: ${params.argsJson}. ` +
+    "Preserve job.sessionTarget and job.sessionKey exactly as provided. " +
     `If the cron job is created, reply exactly: ${params.exactReply}. ` +
     "If the tool call is cancelled, the job is not created, or you cannot confirm creation, " +
     "reply briefly saying that and ask me to retry. No markdown. " +