Cancel Skill

Intelligent cancellation that detects and cancels the active OMC mode.

The cancel skill is the standard way to complete and exit any OMC mode. When the stop hook detects completion, it instructs the LLM to invoke this skill for state cleanup. Retry a failed operation in the same scope and report what remains; --force changes shutdown urgency, never scope, lock handling, or ownership checks. --all is the only cross-session authorization.

Cancellation Contract

The flags control independent scope and shutdown dimensions:

Invocation	Scope	Shutdown behavior
no flags	Current session only	Graceful cancellation, including teammate shutdown waits
--force	Current session only	Forced cancellation: skip graceful waits, but still use protected state tools and honor locks/ownership
--all	Every known session, by explicit session id	Normal safe cancellation independently for each session, then explicit legacy/global cleanup
--force --all	Every known session, by explicit session id	Forced-all: skip graceful waits for each session, then perform the authorized legacy/global cleanup

Resolve the current identity from OMC_SESSION_ID in CLI contexts or the hook-provided session_id. A missing or ambiguous identity for no flags or --force fails closed: do not aggregate state, choose a discovered session, or issue an unscoped cleanup. This is a fail-closed error for the default command and for --force. --all may enumerate known sessions, but every concrete id is still read, cancelled, and cleared independently.

What It Does

Automatically detects and cancels active modes: