Instructions

This skill ships the fix. It assumes the triage skill has already produced:

• A failing test on the current branch.
• A root-cause comment on the Linear ticket.
• An "allow-list status: yes" determination per docs/bug-automation-allowlist.md.

If any of those is missing, abort and run triage first. Do not freelance a fix without a failing test.

Procedure

1. Verify prerequisites

• Current branch has a failing test commit at HEAD.
• Linear ticket has the triage summary comment.
• The bug category is on the allow-list. Re-read docs/bug-automation-allowlist.md and confirm the category. If the category changed since triage ran, abort.

2. Pick the minimal fix

Constraints:

• Source code change ≤ 100 LOC. Tests don't count.
• Replace > delete. If the fix would remove more than 20 LOC of existing logic, you are not bug-fixing — you are refactoring. Abort.
• One module. The fix touches one server module or one feature or one component.
• No schema migrations.
• No new dependencies.

If you can't fit the fix inside these limits, stop. Post a Linear comment listing what's needed and hand back to a human.

3. Apply the fix

• Make the change on the current (triage) branch — same branch as the failing test, so the fix and the test land together.
• Reuse existing helpers and utilities. Do not introduce new abstractions for a single bug fix.
• Respect the area's CLAUDE.md (read it before editing). Cite the rule you're following in the PR body if non-obvious.
• Add no comments unless the why of the fix would surprise a future reader (see project convention).

4. Run the full local suite

pnpm typecheck
pnpm lint
pnpm test:unit     # from apps/studio if the change is there

If any check fails:

• If the failure is caused by your fix: iterate within the LOC budget.
• If the failure is unrelated and pre-existing on main: stop and report. Do not push.

The previously-failing test must now pass — confirm in the output before continuing.

5. Commit and open the PR

gt create -m "fix(<area>): <one-line summary>"
gt submit --draft

The PR body must contain:

## Root cause
<paste from triage>

## Fix
<one or two sentences — what changed, why this is the minimal fix>

## Allow-list category
<category from docs/bug-automation-allowlist.md>

## Closes
<Linear ticket ID>

## Verification
- Failing test from triage now passes: <path>
- Full unit suite passes locally
- typecheck + lint pass

Apply labels:

• ai-authored
• risk:<tier> per docs/risk-taxonomy.md
• The originating area:* label from the Linear ticket

6. Post to Linear

Update the ticket with:

## Bugfix PR opened

PR: <url>
Risk tier: <risk:low|medium>

Hard rules

• No fix without a passing-from-failing test in the same PR.
• Never push directly to main. Always via gt submit --draft.
• Refuse to exceed 100 LOC source change. Escalate instead.
• Never delete existing tests to make CI pass. If a test is wrong, that's a separate PR.
• Never edit prisma/, src/server/trpc.ts, src/server/modules/auth, or any path in risk:high. Allow-list excludes these.

Anti-patterns the agent must refuse

• Adding a "defensive" check unrelated to the failing test.
• Refactoring the file while fixing the bug ("while I was here").
• Combining two bugs into one PR.
• Disabling a flaky test to make CI green.
• Inventing a feature flag to gate the fix.