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:

• Autopilot: Stops the workflow while preserving progress for resume.
• Ralph: Stops the persistence loop.
• Legacy Ultrawork / UltraQA: Removes stale upgraded-installation state only; neither is a live workflow.
• Ultragoal: Clears its session runtime guard while preserving durable .omc/ultragoal/ plan and ledger artifacts.
• Swarm: Stops coordinated agents and releases claimed tasks only in its authorized shared cleanup path.
• Ultrapilot / Pipeline: Stops their worker or sequential execution.
• Team: Uses the active team surface for graceful shutdown, then clears session-scoped Team state; forced paths skip waits. Claude Code 2.1.178+ has no TeamDelete.
• Team + Ralph: Team is cancelled first, then linked Ralph is cleared in the same session; a Team failure retains linked Ralph.
• OMC Teams, Plan Consensus, and Self-Improve: Use their mode-specific protected cleanup and preserve artifacts designated for resume.

Usage

/oh-my-claudecode:cancel
/oh-my-claudecode:cancel --force
/oh-my-claudecode:cancel --all
/oh-my-claudecode:cancel --force --all

Or say: cancelomc, stopomc.

Critical: Deferred Tool Handling

The state tools (state_clear, state_read, state_write, state_list_active, state_get_status) may be deferred by Claude Code. Before calling any of them, load all of them with ToolSearch:

ToolSearch(query="select:mcp__plugin_oh-my-claudecode_t__state_clear,mcp__plugin_oh-my-claudecode_t__state_read,mcp__plugin_oh-my-claudecode_t__state_write,mcp__plugin_oh-my-claudecode_t__state_list_active,mcp__plugin_oh-my-claudecode_t__state_get_status")

If state_clear is unavailable or fails, retry the same scoped operation and report the failure. The fallback below is only an emergency escape from a stop-hook loop for a non-force, non-Team cancellation. It removes files only for an explicitly identified current session. Do NOT use this fallback for autopilot, team, or omc-teams, or for --force/--all; never use it to bypass a lock, ownership check, corruption, or another state-tool failure. Linked modes need one protected operation per mode.

Replace MODE with the specific mode (for example ralplan, ralph, ultrawork, or ultragoal).

# Emergency fallback: direct file removal for one identified session only.
SESSION_ID="${OMC_SESSION_ID:-${CLAUDE_SESSION_ID:-${CLAUDECODE_SESSION_ID:-}}}"
REPO_ROOT="$(git rev-parse --show-toplevel 2>/dev/null || { d="$PWD"; while [ "$d" != "/" ] && [ ! -d "$d/.omc" ]; do d="$(dirname "$d")"; done; echo "$d"; })"
sha256portable() { printf '%s' "$1" | (sha256sum 2>/dev/null || shasum -a 256) | cut -c1-16; }

if [ -n "${OMC_STATE_DIR:-}" ]; then
  SOURCE="$(git remote get-url origin 2>/dev/null || echo "$REPO_ROOT")"
  HASH="$(sha256portable "$SOURCE")"
  DIR_NAME="$(basename "$REPO_ROOT" | sed 's/[^a-zA-Z0-9_-]/_/g')"
  OMC_STATE="$OMC_STATE_DIR/${DIR_NAME}-${HASH}/state"
elif [ "$REPO_ROOT" != "/" ] && [ -d "$REPO_ROOT/.omc" ]; then
  OMC_STATE="$REPO_ROOT/.omc/state"
else
  echo "ERROR: Could not locate .omc state directory" >&2; exit 1
fi
[ -d "$OMC_STATE" ] || { echo "ERROR: State dir not found at $OMC_STATE" >&2; exit 1; }
MODE="ralplan" # replace with the target mode
[ -n "$SESSION_ID" ] || { echo "ERROR: current session identity is required; refusing unscoped fallback" >&2; exit 1; }

if [ -d "$OMC_STATE/sessions/$SESSION_ID" ]; then
  rm -f "$OMC_STATE/sessions/$SESSION_ID/${MODE}-state.json" \
    "$OMC_STATE/sessions/$SESSION_ID/${MODE}-stop-breaker.json" \
    "$OMC_STATE/sessions/$SESSION_ID/skill-active-state.json"
  NOW_ISO="$(date -u +"%Y-%m-%dT%H:%M:%SZ")"
  EXPIRES_ISO="$(date -u -d "+30 seconds" +"%Y-%m-%dT%H:%M:%SZ" 2>/dev/null || python3 - <<'PY'
from datetime import datetime, timedelta, timezone
print((datetime.now(timezone.utc) + timedelta(seconds=30)).strftime('%Y-%m-%dT%H:%M:%SZ'))
PY
)"
  printf '{"active":true,"requested_at":"%s","expires_at":"%s","mode":"%s","source":"bash_fallback"}' \
    "$NOW_ISO" "$EXPIRES_ISO" "$MODE" > "$OMC_STATE/sessions/$SESSION_ID/cancel-signal-state.json"
fi

Cancellation Flow

This is the authoritative procedure for every invocation.

1. Parse Arguments

Parse exact flags independently; unknown or near-match arguments do nothing:

FORCE_MODE=false
ALL_MODE=false
for arg in "$@"; do
  case "$arg" in
    --force) FORCE_MODE=true ;;
    --all) ALL_MODE=true ;;
  esac
done
SCOPE="current"
if [[ "$ALL_MODE" == true ]]; then SCOPE="all"; fi
GRACEFUL_MODE=true
if [[ "$FORCE_MODE" == true ]]; then GRACEFUL_MODE=false; fi

The parsed values select exactly one row in the contract above.

2. Detect Active Modes

1. For no flags or --force, require one unambiguous current session id and call state_list_active(session_id="<current_session_id>"). Its scoped result is authoritative; never use an aggregate result to infer ownership.
2. For --all, call state_list_active(all=true) once and retain every concrete session id. Discovery enumerates targets; it is not a Team read.
3. For each selected id, call state_get_status(mode="<mode>", session_id="<session_id>") before mode cleanup. Treat Ultrawork as retired cleanup input.
4. Pass the selected id to every read, write, and clear. Protected state tools enforce the shared mutation lock and ownership boundary; no flag bypasses either one.

Use this dependency order when several modes appear in one scoped status:

1. Autopilot (including its linked Ralph and retired-state cleanup)
2. Standalone Ralph
3. Retired Ultrawork and UltraQA
4. Ultragoal runtime guard
5. Shared Swarm state (global pass only)
6. Ultrapilot and Pipeline
7. Native Team
8. Legacy OMC Teams
9. Plan Consensus and Self-Improve

Ralph linked to Team is excluded from the standalone step and is handled only after Team succeeds; this prevents the persistence loop from outliving workers.

3. Cancel Each Selected Session

Process each selected session independently in this dependency order. A failed or unresolved scoped operation marks that session unsuccessful: retain affected state/runtime records, report the scope and reason, and do not claim linked cleanup. An --all run may continue other ids, but any such failure blocks the final global pass.

Autopilot (primary first)

1. Read the exact session state, including workflowRunId when present.
2. Pause only that run with state_write(mode="autopilot", session_id="<session_id>", active=false, state={workflowRunId: "<exact run id>"}); do not replay the readback. The state tool revalidates workflow integrity under its mutation lock.
3. If the primary write fails, stop this session's dependent cleanup. Otherwise, clear only same-session named-workflow state_clear(mode="ralplan", session_id="<session_id>"), then linked Ralph, then retired UltraQA. Preserve the paused primary for resume when a dependent clear fails. Force mode keeps this primary-first ordering.

The primary pause preserves workflow, pipeline tracking, and task identity. A target_state_sha256 may be supplied only when it is the exact hash of the current serialized state. Never clear nested ralplan, linked state, cancel signals, or runtime artifacts after a failed primary write; report the exact dependent failure and retry it in the same session.

Team (native Claude Code)

1. Read state_read(mode="team", session_id="<session_id>") and obtain the captured team name and active worker labels. Never select a Team from an aggregate read.
2. On graceful paths, signal each named teammate through the active surface, wait up to 15 seconds per member, then reconcile for 5 more seconds. Record acknowledgements and timeouts. Forced paths skip both waits.
3. After graceful confirmation/timeouts (or immediately when forced), clear state_clear(mode="team", session_id="<session_id>"). If the protected clear fails for lock, ownership, corruption, or another reason, retain Team runtime records and linked Ralph; do not use an unscoped clear or fallback.
4. Only after Team clear succeeds, inspect linked Ralph and clear it with the same session id (state_read(mode="ralph", session_id="<session_id>") then state_clear(mode="ralph", session_id="<session_id>")). For legacy omc team / /omc-teams workers, run the captured team-name orphan scan after state cleanup; native Team has no TeamDelete.

Report the team name, signaled members, responses, timeouts, whether Team and linked Ralph state cleared, and any manual cleanup needed. A graceful timeout is recorded separately; only an unresolved protected operation blocks the global pass. The legacy orphan scan is limited to the captured name and must not terminate an uncaptured native Team or delete a ~/.claude/teams root.

The legacy scan, when applicable, is:

node "${CLAUDE_PLUGIN_ROOT}/scripts/cleanup-orphans.mjs" \
  --team-name "<captured_team_name>"

Use --dry-run to inspect without terminating workers. This scan is not a substitute for the protected Team clear and is never inferred from a name-prefix match.

Linked Ralph context

If cancellation starts while Ralph is linked, apply the same Team-first ordering. Never clear Ralph before a linked Team has been successfully handled; if Team fails, Ralph remains protected. Both operations use the selected id.

Other modes

• Standalone Ralph: state_clear(mode="ralph", session_id="<session_id>").
• Retired Ultrawork: state_clear(mode="ultrawork", session_id="<session_id>") only for the stale scoped record; never reactivate or route it.
• Retired UltraQA: state_clear(mode="ultraqa", session_id="<session_id>") only for stale pre-5.0.0 state.
• Ultragoal: state_clear(mode="ultragoal", session_id="<session_id>") clears only its runtime guard; preserve .omc/ultragoal/ artifacts.
• Ultrapilot, Pipeline, Plan Consensus, and Self-Improve: use their protected session-scoped clear and mode-specific resume/artifact rules.
• Swarm and other shared state are not guessed from a session; process them in the authorized global pass only. OMC Teams use their own tmux/runtime cleanup.

Self-Improve cleanup clears its resolved state and orphaned worktrees while preserving iteration_state and recording status: "user_stopped" in the resolved agent-settings.json. New topic roots are not replaced by a flat legacy root. OMC Teams are cleaned through their own captured tmux/runtime records, never as native Team state; clear omc-teams only through that mode's protected session operation.

Finally, clear state_clear(mode="skill-active", session_id="<session_id>") as the last scoped operation. A failure also makes that session unresolved.

4. Authorized Global Pass

The global pass is allowed only for --all, after every concrete session id is attempted successfully and has completed its scoped flow, including the final skill-active clear. If any session operation failed or remains unresolved, report partial completion and omit this pass. Never replace a failed scoped operation with a global retry. If all-session enumeration itself fails, returns an ambiguous id, or cannot capture a Team owner, treat the affected scope as unresolved and stop before any unscoped operation. A legacy-only entry may be reported, but it does not authorize guessing a current session or deleting a native Team root.

Use protected state tools for the explicit pass, for example:

state_clear(mode="<legacy-mode>")  # no session_id: --all authorization only

An unscoped state_clear is not a legacy-only API: it can revisit session state as well as legacy/shared artifacts. Restrict it to the compatibility paths explicitly authorized for this pass, including legacy mode JSON, Swarm databases/markers, checkpoints, and shared OMC worker registries. Do not clear native Claude roots or any Team root whose owner was not successfully captured and cleared; uncaptured Team roots remain protected. Report global cleanup failures separately from scoped session failures.

The explicit compatibility set is:

• .omc/state/{autopilot,ralph,ralph-plan,ralph-verification}-state.json
• .omc/state/{ultrawork,ultraqa,ultrapilot,pipeline,omc-teams}-state.json
• .omc/state/{ultrapilot-ownership,plan-consensus,ralplan,boulder,hud}.json
• .omc/state/subagent-tracking.json and .omc/state/subagent-tracker.lock
• .omc/state/{swarm.db,swarm.db-wal,swarm.db-shm,swarm-active.marker,swarm-tasks.db}
• .omc/state/{rate-limit-daemon.pid,rate-limit-daemon.log}
• .omc/state/checkpoints/ and an empty .omc/state/sessions/ directory
• shared legacy Team bridge heartbeats and .omc/state/team-mcp-workers.json, only after captured owners succeed

These names expand to the following legacy records (and no session-owned replacement): autopilot-state.json, ralph-state.json, ralph-plan-state.json, ralph-verification.json, ultrawork-state.json, ultraqa-state.json, ultrapilot-state.json, ultrapilot-ownership.json, pipeline-state.json, omc-teams-state.json, plan-consensus.json, ralplan-state.json, boulder.json, hud-state.json, subagent-tracking.json, and subagent-tracker.lock.

Shared database compatibility records are swarm.db, swarm.db-wal, swarm.db-shm, swarm-active.marker, and swarm-tasks.db; daemon records are rate-limit-daemon.pid and rate-limit-daemon.log. Checkpoints are removed only as part of this authorized global pass.

Do not interpret this list as permission to remove arbitrary files under .omc/state, ~/.claude/teams, or ~/.claude/tasks. Unlisted or uncaptured Team/runtime records remain for inspection and future ownership resolution.

The global pass must retain the same lock and ownership checks as scoped operations. It may continue recording an error for one compatibility item after the per-session gate opens, but must report that global failure and never claim a complete reset. It must not delete durable Autopilot, Ultragoal, Self-Improve, or Team handoff artifacts merely because they share a directory.

If no active mode is found in the selected scope, report: “No active OMC modes detected.” For a current-session command, do not silently broaden that result; use --all to enumerate other sessions and perform the global pass.

Preserved State

Mode	Cancellation result
Autopilot	active=false with progress, phase, plan, and verdicts preserved
Ralph, Ultrawork, UltraQA, Swarm, Ultrapilot, Pipeline	State cleared when the protected scoped/global operation succeeds
Ultragoal	Runtime guard cleared; durable plan/ledger preserved
Team	Handoffs and uncaptured runtime roots preserved; selected state cleared only after its flow
Plan Consensus / Self-Improve	Mode-specific resume/artifact records preserved as documented by the mode

Autopilot can resume with /oh-my-claudecode:autopilot; Ultragoal's durable plan and ledger can resume through /ultragoal. Ralph and retired state do not provide a resume path. Team handoffs remain available for a later scoped resume, while shared Swarm and legacy records require explicit authorization.

Cancellation reports should identify the selected scope, modes observed, successful and failed operations, skipped waits, and any retained records. Do not turn a timeout, missing identity, lock conflict, ownership mismatch, or malformed state into a success message. A successful current-session report does not imply that another session or a shared legacy artifact was touched.

MCP Worker Cleanup

For selected-session cancellation, inspect only the captured team's .omc/state/team-bridge/{team}/*.heartbeat.json records and capture exact worker handles before state cleanup. Send shutdown signals and terminate only those exact tmux session identifiers, not sessions selected by name prefix. If ownership or identity cannot be established, retain the records and report manual cleanup. Remove their heartbeat/registry entries only after protected cleanup succeeds.

After every concrete session succeeds, the authorized --all global runtime cleanup may remove shared legacy bridge state for captured Team names. Populate CAPTURED_TEAM_NAMES only from successful scoped Team reads; retain every uncaptured registry/root. Use the exact captured worker identities for shutdown; a team-name prefix is not ownership evidence. Remove only matching bridge records and registry entries after their cleanup succeeds.