diff --git a/.openclaw-sync/source.json b/.openclaw-sync/source.json
index 0624cb29e..e410589a2 100644
--- a/.openclaw-sync/source.json
+++ b/.openclaw-sync/source.json
@@ -1,5 +1,5 @@
 {
   "repository": "openclaw/openclaw",
-  "sha": "f14e91b39f24616abd84f633409892c9ea15bab0",
-  "syncedAt": "2026-04-21T07:30:09.533Z"
+  "sha": "047acaa1765fce467601f2ab9d4351110a5fb5f9",
+  "syncedAt": "2026-04-21T07:48:11.102Z"
 }
diff --git a/docs/tools/acp-agents.md b/docs/tools/acp-agents.md
index aba4a260c..04a44ce65 100644
--- a/docs/tools/acp-agents.md
+++ b/docs/tools/acp-agents.md
@@ -787,6 +787,18 @@ openclaw config set plugins.entries.acpx.config.timeoutSeconds 180
 
 Restart the gateway after changing this value.
 
+### Health probe agent configuration
+
+The bundled `acpx` plugin probes one harness agent while deciding whether the
+embedded runtime backend is ready. It defaults to `codex`. If your deployment
+uses a different default ACP agent, set the probe agent to the same id:
+
+```bash
+openclaw config set plugins.entries.acpx.config.probeAgent claude
+```
+
+Restart the gateway after changing this value.
+
 ## Permission configuration
 
 ACP sessions run non-interactively — there is no TTY to approve or deny file-write and shell-exec permission prompts. The acpx plugin provides two config keys that control how permissions are handled: