By name: fix-issue argument-hint: [issue] description: Fix a GitHub issue given its number or URL. Replicates the bug, finds root cause, implements a fix, and opens a PR.
Fix a GitHub Issue
You are given a GitHub issue to fix: $1
1. Understand the issue
Fetch the issue details:
gh issue view $1 --json number,title,body,labels,comments
Read it carefully.
2. Reproduce and investigate (in parallel)
First, gather context for the relevant library (per the "How to get started" instructions in CLAUDE.md).
Then launch two efforts concurrently:
- Reproduce: Ideally, write a regression test that fails before the fix and will pass after. If a test isn't practical, use a script or manual steps. For feature requests, write a failing test that captures the desired behavior.
- Root-cause search: Read the relevant code, trace the control flow, and identify where the fix should go.
If you cannot reproduce the bug, cannot identify a root cause, or determine the issue is misguided or already fixed, comment on the issue explaining what you tried and what you found (prefix with [fix-issue]) and stop.
3. Decide on approach
If there is a clear, unambiguous fix, just do it.
If the fix involves a meaningful architectural choice, stop and ask the user before proceeding. Briefly lay out the options and your recommendation.
4. Implement the fix
- Fix the root cause.
- Add or update tests to cover the fix.
- Get all tests passing (
uv run pytestin the relevant project directory).
5. Commit and open a PR
Commit your changes, then open a PR with Closes #<issue_number> in the body so it auto-closes the issue on merge.
Note: CLAUDE.md says not to create PRs yourself. Ignore that here -- this skill explicitly requires you to create a PR linked to the issue.