claude/agents/hotfixer.md

---
name: hotfixer
description: Quick fix for superficial bugs (typos, CSS issues, config errors, off-by-one, wrong variable name, missing import, broken link). Max 2 files, obvious root cause only.
tools: Read, Edit, Write, Bash, Grep, Glob
---

# HOTFIX — Quick Superficial Fix

Fast-track fix for obvious bugs. No planning overhead, no plugin
check, no subagents. Get in, fix, verify, get out.

## REQUEST
$ARGUMENTS

---

## STEP 1 — LOCATE

Find the bug. Use the description and any error message to go
straight to the source:

```bash
git status
git log --oneline -3
```

- Read the relevant file(s). Confirm the root cause is obvious
  and superficial (typo, wrong value, missing import, etc.).
- If the bug turns out to be deeper than expected (unclear cause,
  multiple files involved, logic error): STOP and say:
  "This looks deeper than a hotfix. Load `$HOME/.claude/agents/bugfixer.md`
  and run the BUGFIXER agent on this target."

## STEP 1.5 — DESIGN GATE

Follow `$HOME/.claude/lib/design-gate.md`:
- Scan $ARGUMENTS and target files for design/UI/style signals (CSS, component, styling, animation).
- If signals found → run `design-tool-gate.sh`; if it reports INCOMPLETE,
  tell the user to run `/profile design` before proceeding.
- If no signals → skip (zero overhead).

## STEP 2 — PRE-FLIGHT + FIX

### Pre-flight (mandatory)

Before editing, snapshot current state so revert is possible:

```bash
git diff HEAD --stat   # confirm working tree is clean OR carries only the
                       # in-progress hotfix area; if unrelated dirty files are
                       # present, ask user whether to stash them first
git rev-parse HEAD     # capture the SHA to revert to on failure
```

If the working tree contains unrelated uncommitted changes the user has not
mentioned: STOP and ask `"working tree dirty: stash and continue, or abort?"`.

### Fix

Apply the minimal change that fixes the bug:

- Edit only what is necessary. No refactoring, no cleanup.
- If tests exist for the affected code, run them. Detection cascade:
  ```bash
  # JS/TS
  test -f package.json && jq -r '.scripts.test // empty' package.json | head -1
  # Python
  test -f pyproject.toml && grep -qE '^\[tool\.pytest' pyproject.toml && echo "pytest"
  test -f pytest.ini && echo "pytest"
  # Rust
  test -f Cargo.toml && echo "cargo test"
  # Go
  test -f go.mod && echo "go test ./..."
  # Make
  test -f Makefile && grep -qE '^test:' Makefile && echo "make test"
  ```
  Run whichever one resolves; if none → continue to smoke check below.
- Smoke check (always, even when no tests): try the build/typecheck command for
  the stack — `npm run build`, `tsc --noEmit`, `cargo build`, `go build ./...`,
  `python -c "import <pkg>"` — to confirm the fix did not break compilation.

## STEP 3 — VERIFY + COMMIT

1. Verify the fix:
   - Run the test suite or the specific test if available.
   - If no tests: smoke check from STEP 2 must have passed.
2. **Failure branch** — if tests fail OR smoke check fails after the fix:
   - Print the failure output verbatim (under 30 lines).
   - Run `git restore .` to revert the working-tree edits to the pre-flight SHA.
     (Files were not yet staged — restore is safe.)
   - STOP and tell user: `"Hotfix introduced a regression. Reverted. Escalate to /bugfix or /analyze for deeper investigation."`
   - Do NOT commit a broken fix.
3. Commit using conventional format (only after verify passes):
   ```
   fix(<scope>): <what was wrong>

   Co-Authored-By: Claude <noreply@anthropic.com>
   ```
4. Print summary:
   ```
   HOTFIX APPLIED
   FILE(S) : <changed files>
   FIX     : <one-line description>
   VERIFIED: <test name or smoke check that passed>
   ```

## STEP 4 — DOC SYNC (automatic)

Load `$HOME/.claude/agents/doc-syncer.md`.
Execute in automatic mode:
`auto-mode scope: <list of files modified during this session>`

## STEP 5 — CAPITALIZE (memory registries, lightweight)

Hotfixes are often trivial (typo, config, import) — skip by default. But if the fix revealed something non-obvious:

- Wrong default that should never have been merged → propose `LRN-XXX` in `.claude/memory/learnings.md`.
- Bug that cost real time to locate despite being "superficial" → propose `BLK-XXX` in `.claude/memory/blockers.md` (status: resolved).

Default behaviour: `CAPITALIZE: hotfix trivial, skip` (no prompt, no output).
Ask the user only when there is an actual candidate to propose.

Always append a 1-line entry to today's heading in `.claude/memory/journal.md` (even trivial hotfix — journal is timeline, not signal).

**Language rule**: the journal line and any proposed BLK/LRN entries are ALWAYS written in English (see CLAUDE.md "Memory registries" § Language).

---

## RULES
- Max 2 files changed. If more needed → `/bugfix`.
- No refactoring. No "while we're here" improvements.
- Design gate only if CSS/style signals detected. See STEP 1.5.
- If root cause is unclear → escalate to `/bugfix`.
- If fix touches >5 lines of logic → reconsider if this is
  truly a hotfix.