AB-4030 inbox_backlog_warning
| Class | Delivery |
| HTTP status | n/a (cli) |
| Retryable | no |
When it happens
doctor or heartbeat notice: oldest unacked message older than the threshold (default 120 s).
Hint
Oldest unacked message is {age}s old ({pending} pending). The harness is not consuming the inbox. Check the adapter state with
agentbus doctor; if the harness is idle, it may need a nudge.
Troubleshooting
agentbus doctor. 2. For Claude Code, confirm the Stop hook is installed (AB-6033). 3. For Codex and OpenCode, confirm the control socket is reachable (AB-6032).