cancel

name	cancel
description	Cancel any active OMB mode (autopilot, ralph, ultrawork, ecomode, ultraqa, swarm, ultrapilot, pipeline, team)

Cancel Skill

Intelligent cancellation that detects and cancels the active OMB mode.

The cancel skill is the standard way to complete and exit any OMB mode. When the stop hook detects work is complete, it instructs the LLM to invoke this skill for proper state cleanup. If cancel fails or is interrupted, retry with --force flag, or wait for the 2-hour staleness timeout as a last resort.

What It Does

Automatically detects which mode is active and cancels it:

• Autopilot: Stops workflow, preserves progress for resume
• Ralph: Stops persistence loop, clears linked ultrawork if applicable
• Ultrawork: Stops parallel execution (standalone or linked)
• Ecomode: Stops token-efficient parallel execution (standalone or linked to ralph)
• UltraQA: Stops QA cycling workflow
• Swarm: Stops coordinated agent swarm, releases claimed tasks
• Ultrapilot: Stops parallel autopilot workers
• Pipeline: Stops sequential agent pipeline
• Team: Sends shutdown inbox to all workers, waits for exit, kills tmux session, and clears team state

Usage

/cancel

Or say: "cancelomc", "stopomc"

Auto-Detection

/cancel follows the session-aware state contract:

• By default the command inspects the current session via state_list_active and state_get_status, navigating .omb/state/sessions/{sessionId}/… to discover which mode is active.
• When a session id is provided or already known, that session-scoped path is authoritative. Legacy files in .omb/state/*.json are consulted only as a compatibility fallback if the session id is missing or empty.
• Swarm is a shared SQLite/marker mode (.omb/state/swarm.db / .omb/state/swarm-active.marker) and is not session-scoped.
• The default cleanup flow calls state_clear with the session id to remove only the matching session files; modes stay bound to their originating session.

Normative Ralph cancellation post-conditions (MUST)

For Ralph-targeted cancellation (standalone or linked), completion is defined by post-conditions:

1. Target Ralph state is terminalized, not silently removed:
   • active=false
   • current_phase='cancelled'
   • completed_at is set (ISO timestamp)
2. If Ralph is linked to Ultrawork or Ecomode in the same scope, that linked mode is also terminalized/non-active.
3. Cancellation MUST remain scope-safe: no mutation of unrelated sessions.

See: docs/contracts/ralph-cancel-contract.md.

Active modes are still cancelled in dependency order:

1. Autopilot (includes linked ralph/ultraqa/ecomode cleanup)
2. Ralph (cleans its linked ultrawork or ecomode)
3. Ultrawork (standalone)
4. Ecomode (standalone)
5. UltraQA (standalone)
6. Swarm (standalone)
7. Ultrapilot (standalone)
8. Pipeline (standalone)
9. Team (tmux-based)
10. Plan Consensus (standalone)

Normative Ralph post-conditions (MUST)

When cancellation targets Ralph state in a scope, completion requires all of the following:

1. Ralph state is terminal in that same scope: active=false, current_phase='cancelled' (or linked terminal phase), and completed_at is set.
2. Linked Ultrawork/Ecomode in the same scope is also terminal/non-active.
3. Unrelated sessions are untouched.

Force Clear All

Use --force or --all when you need to erase every session plus legacy artifacts, e.g., to reset the workspace entirely.

/cancel --force

/cancel --all

Steps under the hood:

1. state_list_active enumerates .omb/state/sessions/{sessionId}/… to find every known session.
2. state_clear runs once per session to drop that session’s files.
3. A global state_clear without session_id removes legacy files under .omb/state/*.json, .omb/state/swarm*.db, and compatibility artifacts (see list).
4. Team artifacts (.omb/state/team/*/, tmux sessions matching omb-team-*) are best-effort cleared as part of the legacy fallback.

Every state_clear command honors the session_id argument, so even force mode still uses the session-aware paths first before deleting legacy files.

Legacy compatibility list (removed only under --force/--all):

• .omb/state/autopilot-state.json
• .omb/state/ralph-state.json
• .omb/state/ralph-plan-state.json
• .omb/state/ralph-verification.json
• .omb/state/ultrawork-state.json
• .omb/state/ecomode-state.json
• .omb/state/ultraqa-state.json
• .omb/state/swarm.db
• .omb/state/swarm.db-wal
• .omb/state/swarm.db-shm
• .omb/state/swarm-active.marker
• .omb/state/swarm-tasks.db
• .omb/state/ultrapilot-state.json
• .omb/state/ultrapilot-ownership.json
• .omb/state/pipeline-state.json
• .omb/state/plan-consensus.json
• .omb/state/ralplan-state.json
• .omb/state/boulder.json
• .omb/state/hud-state.json
• .omb/state/subagent-tracking.json
• .omb/state/subagent-tracker.lock
• .omb/state/rate-limit-daemon.pid
• .omb/state/rate-limit-daemon.log
• .omb/state/checkpoints/ (directory)
• .omb/state/sessions/ (empty directory cleanup after clearing sessions)

Implementation Steps

When you invoke this skill:

1. Parse Arguments

# Check for --force or --all flags
FORCE_MODE=false
if [[ "$*" == *"--force"* ]] || [[ "$*" == *"--all"* ]]; then
  FORCE_MODE=true
fi

2. Detect Active Modes

The skill now relies on the session-aware state contract rather than hard-coded file paths:

1. Call state_list_active to enumerate .omb/state/sessions/{sessionId}/… and discover every active session.
2. For each session id, call state_get_status to learn which mode is running (autopilot, ralph, ultrawork, etc.) and whether dependent modes exist.
3. If a session_id was supplied to /cancel, skip legacy fallback entirely and operate solely within that session path; otherwise, consult legacy files in .omb/state/*.json only if the state tools report no active session. Swarm remains a shared SQLite/marker mode outside session scoping.
4. Any cancellation logic in this doc mirrors the dependency order discovered via state tools (autopilot → ralph → …).

3A. Force Mode (if --force or --all)

Use force mode to clear every session plus legacy artifacts via state_clear. Direct file removal is reserved for legacy cleanup when the state tools report no active sessions.

3B. Smart Cancellation (default)

If Team Active (tmux-based)

Teams are detected by checking for config files in .omb/state/team/:

# Check for active teams
ls .omb/state/team/*/config.json 2>/dev/null

Two-pass cancellation protocol:

Pass 1: Graceful Shutdown

For each team found in .omb/state/team/:
  1. Read config.json to get team_name and workers list
  2. For each worker:
     a. Write shutdown inbox to .omb/state/team/{name}/workers/{worker}/inbox.md
     b. Send short trigger via tmux send-keys
     c. Wait up to 15 seconds for worker tmux pane to exit
     d. If still alive: mark as unresponsive

Pass 2: Force Kill

After graceful pass:
  1. For each remaining alive worker:
     a. Send C-c via tmux send-keys
     b. Wait 2 seconds
     c. Kill the tmux window if still alive
  2. Destroy the tmux session: tmux kill-session -t omb-team-{name}

Cleanup:

  1. Strip AGENTS.md team worker overlay (<!-- OMB:TEAM:WORKER:START/END -->)
  2. Remove team state directory: rm -rf .omb/state/team/{name}/
  3. Clear team mode state: state_clear(mode="team")
  4. Emit structured cancel report

Structured Cancel Report:

Team "{team_name}" cancelled:
  - Workers signaled: N
  - Graceful exits: M
  - Force killed: K
  - tmux session destroyed: yes/no
  - State cleaned up: yes/no

Implementation note: The cancel skill is executed by the LLM, not as a bash script. When you detect an active team:

1. Check .omb/state/team/*/config.json for active teams
2. For each worker in config.workers, write shutdown inbox and send trigger
3. Wait briefly for workers to exit (15s timeout)
4. Force kill remaining workers via tmux
5. Destroy tmux session: tmux kill-session -t omb-team-{name}
6. Strip AGENTS.md overlay
7. Remove state: rm -rf .omb/state/team/{name}/
8. state_clear(mode="team")
9. Report structured summary to user

If Autopilot Active

Call cancelAutopilot() from src/hooks/autopilot/cancel.ts:27-78:

# Autopilot handles its own cleanup + ralph + ultraqa
# Just mark autopilot as inactive (preserves state for resume)
if [[ -f .omb/state/autopilot-state.json ]]; then
  # Clean up ralph if active
  if [[ -f .omb/state/ralph-state.json ]]; then
    RALPH_STATE=$(cat .omb/state/ralph-state.json)
    LINKED_UW=$(echo "$RALPH_STATE" | jq -r '.linked_ultrawork // false')

    # Clean linked ultrawork first
    if [[ "$LINKED_UW" == "true" ]] && [[ -f .omb/state/ultrawork-state.json ]]; then
      rm -f .omb/state/ultrawork-state.json
      echo "Cleaned up: ultrawork (linked to ralph)"
    fi

    # Clean ralph
    rm -f .omb/state/ralph-state.json
    rm -f .omb/state/ralph-verification.json
    echo "Cleaned up: ralph"
  fi

  # Clean up ultraqa if active
  if [[ -f .omb/state/ultraqa-state.json ]]; then
    rm -f .omb/state/ultraqa-state.json
    echo "Cleaned up: ultraqa"
  fi

  # Mark autopilot inactive but preserve state
  CURRENT_STATE=$(cat .omb/state/autopilot-state.json)
  CURRENT_PHASE=$(echo "$CURRENT_STATE" | jq -r '.phase // "unknown"')
  echo "$CURRENT_STATE" | jq '.active = false' > .omb/state/autopilot-state.json

  echo "Autopilot cancelled at phase: $CURRENT_PHASE. Progress preserved for resume."
  echo "Run /autopilot to resume."
fi

If Ralph Active (but not Autopilot)

Call clearRalphState() + clearLinkedUltraworkState() from src/hooks/ralph-loop/index.ts:147-182:

if [[ -f .omb/state/ralph-state.json ]]; then
  # Check if ultrawork is linked
  RALPH_STATE=$(cat .omb/state/ralph-state.json)
  LINKED_UW=$(echo "$RALPH_STATE" | jq -r '.linked_ultrawork // false')

  # Clean linked ultrawork first
  if [[ "$LINKED_UW" == "true" ]] && [[ -f .omb/state/ultrawork-state.json ]]; then
    UW_STATE=$(cat .omb/state/ultrawork-state.json)
    UW_LINKED=$(echo "$UW_STATE" | jq -r '.linked_to_ralph // false')

    # Only clear if it was linked to ralph
    if [[ "$UW_LINKED" == "true" ]]; then
      rm -f .omb/state/ultrawork-state.json
      echo "Cleaned up: ultrawork (linked to ralph)"
    fi
  fi

  # Clean ralph state
  rm -f .omb/state/ralph-state.json
  rm -f .omb/state/ralph-plan-state.json
  rm -f .omb/state/ralph-verification.json

  echo "Ralph cancelled. Persistent mode deactivated."
fi

If Ultrawork Active (standalone, not linked)

Call deactivateUltrawork() from src/hooks/ultrawork/index.ts:150-173:

if [[ -f .omb/state/ultrawork-state.json ]]; then
  # Check if linked to ralph
  UW_STATE=$(cat .omb/state/ultrawork-state.json)
  LINKED=$(echo "$UW_STATE" | jq -r '.linked_to_ralph // false')

  if [[ "$LINKED" == "true" ]]; then
    echo "Ultrawork is linked to Ralph. Use /cancel to cancel both."
    exit 1
  fi

  # Remove local state
  rm -f .omb/state/ultrawork-state.json

  echo "Ultrawork cancelled. Parallel execution mode deactivated."
fi

If UltraQA Active (standalone)

Call clearUltraQAState() from src/hooks/ultraqa/index.ts:107-120:

if [[ -f .omb/state/ultraqa-state.json ]]; then
  rm -f .omb/state/ultraqa-state.json
  echo "UltraQA cancelled. QA cycling workflow stopped."
fi

No Active Modes

echo "No active OMB modes detected."
echo ""
echo "Checked for:"
echo "  - Autopilot (.omb/state/autopilot-state.json)"
echo "  - Ralph (.omb/state/ralph-state.json)"
echo "  - Ultrawork (.omb/state/ultrawork-state.json)"
echo "  - UltraQA (.omb/state/ultraqa-state.json)"
echo ""
echo "Use --force to clear all state files anyway."

Implementation Notes

The cancel skill runs as follows:

1. Parse the --force / --all flags, tracking whether cleanup should span every session or stay scoped to the current session id.
2. Use state_list_active to enumerate known session ids and state_get_status to learn the active mode (autopilot, ralph, ultrawork, etc.) for each session.
3. When operating in default mode, call state_clear with that session_id to remove only the session’s files, then run mode-specific cleanup (autopilot → ralph → …) based on the state tool signals.
4. In force mode, iterate every active session, call state_clear per session, then run a global state_clear without session_id to drop legacy files (.omb/state/*.json, compatibility artifacts) and report success. Swarm remains a shared SQLite/marker mode outside session scoping.
5. Team artifacts (.omb/state/team/*/, tmux sessions matching omb-team-*) remain best-effort cleanup items invoked during the legacy/global pass.

State tools always honor the session_id argument, so even force mode still clears the session-scoped paths before deleting compatibility-only legacy state.

Mode-specific subsections below describe what extra cleanup each handler performs after the state-wide operations finish.

Messages Reference

Mode	Success Message
Autopilot	"Autopilot cancelled at phase: {phase}. Progress preserved for resume."
Ralph	"Ralph cancelled. Persistent mode deactivated."
Ultrawork	"Ultrawork cancelled. Parallel execution mode deactivated."
Ecomode	"Ecomode cancelled. Token-efficient execution mode deactivated."
UltraQA	"UltraQA cancelled. QA cycling workflow stopped."
Swarm	"Swarm cancelled. Coordinated agents stopped."
Ultrapilot	"Ultrapilot cancelled. Parallel autopilot workers stopped."
Pipeline	"Pipeline cancelled. Sequential agent chain stopped."
Team	"Team cancelled. Teammates shut down and cleaned up."
Plan Consensus	"Plan Consensus cancelled. Planning session ended."
Force	"All OMB modes cleared. You are free to start fresh."
None	"No active OMB modes detected."

What Gets Preserved

Mode	State Preserved	Resume Command
Autopilot	Yes (phase, files, spec, plan, verdicts)	/autopilot
Ralph	No	N/A
Ultrawork	No	N/A
UltraQA	No	N/A
Swarm	No	N/A
Ultrapilot	No	N/A
Pipeline	No	N/A
Plan Consensus	Yes (plan file path preserved)	N/A

Notes

• Dependency-aware: Autopilot cancellation cleans up Ralph and UltraQA
• Link-aware: Ralph cancellation cleans up linked Ultrawork or Ecomode
• Safe: Only clears linked Ultrawork, preserves standalone Ultrawork
• Local-only: Clears state files in .omb/state/ directory
• Resume-friendly: Autopilot state is preserved for seamless resume
• Team-aware: Detects tmux-based teams and performs graceful shutdown with force-kill fallback

Tmux Team Cleanup

When cancelling team mode, the cancel skill should:

1. Kill all team tmux sessions: tmux list-sessions -F '#{session_name}' 2>/dev/null | grep '^omb-team-' and kill each
2. Remove team state directories: rm -rf .omb/state/team/*/
3. Strip AGENTS.md overlay: Remove content between <!-- OMB:TEAM:WORKER:START --> and <!-- OMB:TEAM:WORKER:END -->

Force Clear Addition

When --force is used, also clean up:

rm -rf .omb/state/team/                  # All team state
# Kill all omb-team-* tmux sessions
tmux list-sessions -F '#{session_name}' 2>/dev/null | grep '^omb-team-' | while read s; do tmux kill-session -t "$s" 2>/dev/null; done