# Implementation Plan: Tier 4 Auto-Patching (tier4_auto_patching_20260306)

## Phase 1: Patch Generation
- [ ] Task: Initialize MMA Environment
- [ ] Task: Extend Tier 4 to generate patches
    - WHERE: src/multi_agent_conductor.py
    - WHAT: Add patch generation on test failure
    - HOW: Use difflib to generate unified diff
    - SAFETY: Only generate, don't apply

## Phase 2: Diff Viewer
- [ ] Task: Implement GUI diff viewer
    - WHERE: src/gui_2.py
    - WHAT: Side-by-side diff display
    - HOW: Custom ImGui rendering or third-party
    - SAFETY: Read-only preview
- [ ] Task: Implement apply button
    - WHERE: src/gui_2.py
    - WHAT: Apply patch to working directory
    - HOW: subprocess.run(['patch', '-p1'])
    - SAFETY: Backup before apply

## Phase 3: Tests & Verification
- [ ] Task: Write patch tests
- [ ] Task: Conductor - Phase Verification