Bugfix

Bugfix Skill - Orchestrator

Orchestrator ONLY spawns Opus subagents and collects summaries. ALL work is delegated.

Critical Rules

1. NEVER read files - subagents read files
2. NEVER run commands - subagents run commands
3. NEVER create commits - subagents create commits
4. Orchestrator only: spawns agents, tracks todos, reports summaries
5. Always use Opus model for ALL Task agents (model: "opus")

Phase 0: Setup Subagent

Spawn a single subagent to understand the bug and set up branches:

Task(general-purpose, model: opus):

Parse bug report and set up fix branch.

---

## Tasks

1. **Parse Bug Report**:
   - Extract bug summary and symptoms
   - Identify affected areas (pages, components, scripts)
   - Note reproduction steps (if provided)
   - Determine severity and impact

2. **Validate Bug Report**:
   - Is it actionable? (clear symptoms, reproducible)
   - What areas might be affected?
   - Are there related error messages?

3. **Create Fix Branch**:
   ```bash
   git checkout main && git pull && git checkout -b fix/<name>

Output Format

---
BUG_VALID: true | false
QUESTIONS_IF_INVALID: []
BUG_REPORT:
  title: "[bug summary]"
  symptoms: "[description of what's wrong]"
  reproduction_steps: [list, if known]
  severity: high | medium | low
AFFECTED_AREAS:
  - pages: [list of routes]
  - components: [list of components]
  - scripts: [scripts affected]
  - other: [any other affected areas]
BRANCH_NAME: fix/<name>
---

**If BUG_VALID: false** → Ask user for clarification before proceeding.

---

## Phase 1: Investigation Subagents (Parallel)

Spawn parallel investigation subagents to find root cause:

Task(Explore, model: opus, run_in_background: true): Investigate bug in affected pages and components.

Find:

• Code paths that could cause the reported symptoms
• Recent changes to affected files (git log)
• Similar patterns that might have the same issue

Output the likely root cause locations and evidence.

Task(Explore, model: opus, run_in_background: true): Search for error patterns and edge cases.

Find:

• Error handling in affected areas
• Edge cases that might not be covered
• State management issues
• Async/timing issues

Output findings relevant to the bug.

Task(Explore, model: opus, run_in_background: true): Check for related issues in similar code.

Find:

• Other code using the same patterns
• Whether the bug might exist elsewhere
• Test coverage for affected areas

Output findings and potential regression points.

Wait for all investigation subagents with TaskOutput. Synthesize findings for root cause analysis.

---

## Phase 2: Root Cause Analysis Subagent

Spawn analysis subagent with investigation results:

Task(general-purpose, model: opus):

Analyze investigation findings and create fix plan.

Context

BUG_REPORT: [from Phase 0] INVESTIGATION_FINDINGS: [synthesis from Phase 1] AFFECTED_AREAS: [list]

Requirements

1. Determine the root cause with evidence
2. Write fix plan to: .claude/plans/.fix.md
3. Include:
   • Root cause explanation
   • Fix approach
   • Files to modify
   • Regression risks
   • Verification steps

Output Format

---
ROOT_CAUSE: "[clear explanation of what causes the bug]"
PLAN_FILE: .claude/plans/<name>.fix.md
FIX_STEPS:
  - id: fix-1
    content: "[what to fix]"
    files: [list of files]
    regression_risk: low | medium | high
VERIFICATION_STEPS:
  - "[how to verify the fix works]"
---

---

## Phase 3: Review Subagent

Spawn review subagent to validate fix plan:

Task(general-purpose, model: opus):

Review fix plan for completeness and correctness.

Tasks

1. Read: .claude/plans/.fix.md

2. Validate:

   • Root cause is correctly identified
   • Fix addresses the root cause (not just symptoms)
   • All affected files are included
   • Regression risks are identified
   • Verification steps are complete

3. If issues found: FIX THEM directly in the plan file

Output Format

---
REVIEW_RESULT: APPROVED | NEEDS_REVISION
CHANGES_MADE: [list of changes, if any]
---

---

## Phase 4: Implementation Subagents

Execute fix steps by invoking `/task` skill. For simple fixes (1-2 steps), run sequentially. For larger fixes, analyze dependencies for wave-based execution.

For EACH fix step, spawn subagent that invokes `/task`:

Task(general-purpose, model: opus):

Execute fix step by invoking /task skill.

Step Details

STEP_ID: [from plan] CONTENT: [fix description from plan] ROOT_CAUSE: [context about what we're fixing]

Workflow

1. Invoke the /task skill:

   Skill(task)
   

   Pass these details to /task:

   • TASK: [CONTENT from step details]
   • Context: This is a bugfix for [ROOT_CAUSE]
   • Note: /task will handle quality checks and commit

2. After /task completes, return the result.

Output Format

---
STEP_ID: [id]
STATUS: SUCCESS | FAILURE
COMMIT: [short hash from /task]
FILES_CHANGED: [list from /task]
BUILD: PASSED | FAILED
LINT: PASSED | FAILED
ERRORS: [if FAILURE]
---

---

## Phase 5: Verification Subagents (Parallel)

Spawn parallel verification subagents:

Task(general-purpose, model: opus, run_in_background: true):

Verify the bug is fixed.

Verification Tasks

1. Check that the original bug symptoms are resolved
2. Run through reproduction steps (if applicable)
3. Verify the fix addresses root cause

Output Format

---
BUG_FIXED: true | false
VERIFICATION_EVIDENCE: "[how we know it's fixed]"
---

Task(general-purpose, model: opus, run_in_background: true):

Check for regressions and code quality.

Checks

1. TypeScript strict compliance: npx tsc --noEmit

2. Lint compliance: npm run lint

3. Build passes: npm run build

4. No forbidden patterns: grep -rn 'console.log|TODO|FIXME' --include='.ts' --include='.tsx' src/

Output Format

---
STATUS: PASSED | FAILED
BUILD: PASSED | FAILED
LINT: PASSED | FAILED
REGRESSIONS_FOUND: [list if any]
---

**Both must pass before proceeding.**

---

## Phase 6: Completion Subagent

Spawn completion subagent:

Task(general-purpose, model: opus):

Finalize bugfix implementation.

Context

BRANCH_NAME: [from Phase 0] PLAN_FILE: .claude/plans/.fix.md BUG_TITLE: [from Phase 0] ROOT_CAUSE: [from Phase 2]

Tasks

1. Final validation:

   • Build passes
   • No uncommitted changes
   • Bug is verified fixed

2. Push fix branch:

   git push -u origin [branch]
   

3. Create PR:

   gh pr create --base main --title "fix: [title]" --body "## Summary
   Fixes: [bug description]
   
   ## Root Cause
   [root cause explanation]
   
   ## Changes
   [bullets describing the fix]
   
   ## Test Plan
   - [ ] Build passes
   - [ ] TypeScript strict mode passes
   - [ ] Lint passes
   - [ ] Bug no longer reproduces
   - [ ] No regressions observed"
   

4. DELETE plan file (MANDATORY):

   rm -f .claude/plans/<name>.fix.md
   

Output Format

---
STATUS: COMPLETE
PR_URL: [url]
PLAN_DELETED: true
---

---

## Phase 7: Report to User

Summarize all results:

```markdown
## Bugfix Complete

**Bug**: [title]

### Root Cause
[brief explanation]

### Fix Applied
- Files changed: [list]
- Commits: X

### Verification
- Bug fixed: YES
- Build: PASSED
- TypeScript: PASSED
- Lint: PASSED
- Regressions: None found

### PR Created
[url]

### Next Steps
1. Review the PR
2. Run `/fix-pr` to address review comments
3. Merge when ready

Progress Tracking

Use TodoWrite throughout:

todos:
  - content: "Parse bug and setup branch"
    status: completed
  - content: "Investigate root cause"
    status: completed
  - content: "Create fix plan"
    status: completed
  - content: "Review fix plan"
    status: completed
  - content: "Implement fix"
    status: in_progress
  - content: "Verify fix and check regressions"
    status: pending
  - content: "Create PR"
    status: pending

Key Principles

1. Orchestrator is minimal - only spawns and collects
2. Root cause first - understand before fixing
3. Fix the cause, not symptoms - avoid band-aid solutions
4. Verify thoroughly - confirm fix works, no regressions
5. Each step uses /task - consistent implementation workflow
6. Clean completion - plan files deleted, PRs created