Module hook 

Hook doorbells: the session’s own hook process picks the letter up.

Every provider CLI runs hooks inside the open session. m4a-inbox is the hook command; this adapter only queues the letter in the session’s inbox when such a hook is installed (armed) or running (live):

Flavor	Hook	Turn starts	Consumer name
claude-rewake	Claude Stop/SessionStart with asyncRewake: true running m4a-inbox wait	immediately, idle session (exit 2 wakes Claude)	live claude-rewake
claude-stop	Claude Stop running m4a-inbox drain --format claude-stop	at the end of the current turn (decision: block)	armed stop-claude-stop
codex-stop	Codex Stop hook, same JSON	end of current turn	armed stop-codex-stop
kimi-stop	Kimi [[hooks]] event = "Stop", exit 2 + stderr	end of current turn	armed stop-kimi-stop
cursor-stop	Cursor stop hook, followup_message	end of current turn (auto-submitted)	armed stop-cursor-stop
grok-stop	Grok Build Stop hook (Claude-compatible JSON)	end of current turn	armed stop-grok-stop

A Stop-hook doorbell cannot start a turn in an idle session; it is the fallback after the in-session primary. The letter stays durable in the inbox either way.

Structs

InboxHookAdapter

Queues a letter for a hook that is installed in the open session.

InboxQueueAdapter

Last link of every local chain: keep the letter durable in the inbox even when no consumer is present, so the next hook run or channel start delivers it. Reported as WakeOutcome::Queued.

Enums

HookFlavor

Which hook drains the inbox.