Oh My Claude Code is a multi-agent orchestration system for Claude Code, coordinating specialized agents, commands, skills, hooks, and workflows. It is designed for developers who want Claude Code to handle coding tasks through coordinated agent roles. Catalogue entries are components of its Claude Code workflow, including agents, commands, skills, hooks, instructions, MCP configuration, and a plugin.
Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add Yeachan-Heo/oh-my-claudecode/plugin install oh-my-claudecodeWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/yeachan-heo/oh-my-claudecode/cancel)<a href="https://agentmods.dev/skills/yeachan-heo/oh-my-claudecode/cancel"><img src="https://agentmods.dev/badge/skills/yeachan-heo/oh-my-claudecode/cancel/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/yeachan-heo/oh-my-claudecode/cancel"><img src="https://agentmods.dev/badge/skills/yeachan-heo/oh-my-claudecode/cancel.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00035 | $0.05161 |
| Opus 5 | $0.00017 | $0.02580 |
| Sonnet 5 | $0.00007 | $0.01032 |
| Haiku 4.5 | $0.00003 | $0.00516 |
Grade C, and why
cancel scanned grade C with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
rm -rf .omc/state/team-bridge/ # Heartbeat files How it starts
The opening of the file, as written. The whole thing — 387 lines — stays where its author put it; the contents beside it link to each section on GitHub.
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 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 the persistence loop
- Legacy Ultrawork state: Cleanup-only removal for upgraded installations; it is not an active workflow
- UltraQA (retired): No live workflow remains; clears stale pre-5.0.0
ultraqa-state.jsonif present - Ultragoal: Clears the session-scoped ultragoal runtime guard (
.omc/state/.../ultragoal-state.json) so PreToolUse/goalenforcement and Stop reinforcement release. Durable.omc/ultragoal/plan/ledger artifacts are preserved. - Swarm: Stops coordinated agent swarm, releases claimed tasks
- Ultrapilot: Stops parallel autopilot workers
- Pipeline: Stops sequential agent pipeline
- Team: Requests shutdown from all teammates through the active team/conversation surface, waits for responses/timeouts, clears OMC team state, clears linked ralph if present. Claude Code 2.1.178+ has no TeamDelete.
- Team+Ralph (linked): Cancels team first (graceful shutdown), then clears ralph state. Cancelling ralph when linked also cancels team first.
Usage
/oh-my-claudecode:cancel
Or say: "cancelomc", "stopomc"
Critical: Deferred Tool Handling
The state management tools (state_clear, state_read, state_write, state_list_active,
state_get_status) may be registered as deferred tools by Claude Code. Before calling
any state tool, you MUST first load all of them via 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")
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 12d ago First seen · 387 lines · 35 tokens per session scan C 4bf75b74c517
cancel is a skill published in the GitHub repository Yeachan-Heo/oh-my-claudecode (39,083 stars, last pushed yesterday), licensed MIT. It adds 35 tokens to every session and 5,161 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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codemap
Generate comprehensive hierarchical codemaps for UNFAMILIAR repositories. Expensive operation - only use when explicitly asked for codebase documentation or initial repository mapping.
deepwork
High-cost orchestrator workflow for large, high-risk, multi-phase coding efforts with meaningful dependencies and review gates. Do not activate for routine multi-file changes.
worktrees
Manage Git worktrees as OMO safe isolated coding lanes for complex, risky, or parallel work.
simplify
Simplifies code for clarity without changing behavior. Use for readability, maintainability, and complexity reduction after behavior is understood.