# Cancel

Cancel stuck or orphaned executions

- Repository: https://github.com/Q00/ouroboros (6302 stars)
- Category: Engineering
- License: MIT
- Last updated: 2026-11-01
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add Q00/ouroboros --skill cancel -g -a claude-code -y`
Codex: `npx skills add Q00/ouroboros --skill cancel -g -a codex -y`
Cursor: `npx skills add Q00/ouroboros --skill cancel -g -a cursor -y`
Gemini CLI: `npx skills add Q00/ouroboros --skill cancel -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add Q00/ouroboros`

## Description

Cancel stuck or orphaned executions

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# /ouroboros:cancel

Cancel stuck or orphaned executions and background jobs through the Ouroboros MCP tools, which work on hosts without shell access.

```
/ouroboros:cancel                 # list this project's active executions, ask which to cancel
/ouroboros:cancel <id>            # cancel one execution (orch_... or execution id) or job (job_...)
/ouroboros:cancel --all           # cancel every running or paused execution of this project
```

## Instructions

### Loading MCP tools (deferred-schema guard)

Ouroboros tools may be deferred, and a schema loaded on one turn can unload by the next. Immediately before each `ouroboros_*` call, load it with the active runtime's tool-discovery capability: `"+ouroboros project status"` for `ouroboros_project_status`; `"+ouroboros cancel"` for `ouroboros_cancel_execution` and `ouroboros_cancel_job`. A call whose schema is not loaded fails with "Invalid tool parameters". If the tool is already callable, discovery is a no-op and an empty result is expected. Use the fallback only when the tool is genuinely absent.

### Listing active executions

Call `ouroboros_project_status` with `project_dir` set to the absolute path of the current project. Active executions are the runs whose `status` is `running` or `paused`; show each one's `session_id`, `started_at`, and `seed_goal`. If the call fails because the project has more runs than `limit`, retry once with `limit` set to the reported run count. The listing covers only runs attributed to this project. Background jobs have no listing tool, so also offer any `job_...` id returned by a start tool earlier in this conversation.

### Steps

The rest: https://github.com/Q00/ouroboros/blob/HEAD/skills/cancel/SKILL.md