# BRIEFING — 2026-06-26T22:24:46Z

## Mission
Analyze patch_explainer.py and its unit tests to design a testing strategy to improve unit test coverage to >= 75% (ideally 100%).

## 🔒 My Identity
- Archetype: explorer
- Roles: explorer
- Working directory: /Users/sjkim1127/Reversecore_MCP/.agents/explorer_m6_1/
- Original parent: 0c44a811-b4db-47e1-891b-60482d466a84
- Milestone: Milestone 6 (patch_explainer.py coverage)

## 🔒 Key Constraints
- Read-only investigation — do NOT implement
- CODE_ONLY network mode (no external network access, only local search/view tools)

## Current Parent
- Conversation ID: 0c44a811-b4db-47e1-891b-60482d466a84
- Updated: 2026-06-26T22:26:00Z

## Investigation State
- **Explored paths**:
  - `reversecore_mcp/tools/common/patch_explainer.py`
  - `tests/unit/tools/common/test_patch_explainer.py`
- **Key findings**:
  - Baseline coverage was 58% due to missing heuristic tests and a critical mocking defect in `test_success` which used `changed_functions` instead of `changes`, resulting in the main decompilation and explanation loop being skipped.
  - Successfully designed 20 unit tests covering all paths and branches, achieving 100% statement coverage for the module.
- **Unexplored areas**:
  - None; coverage is at 100%.

## Key Decisions Made
- Created a standalone proposed unit test file (`proposed_test_patch_explainer.py`) which achieves 100% coverage, so that the implementer agent can directly copy/overwrite the existing unit tests.

## Artifact Index
- /Users/sjkim1127/Reversecore_MCP/.agents/explorer_m6_1/analysis.md — Detailed analysis of patch_explainer.py and test plan
- /Users/sjkim1127/Reversecore_MCP/.agents/explorer_m6_1/handoff.md — 5-component handoff report
- /Users/sjkim1127/Reversecore_MCP/.agents/explorer_m6_1/proposed_test_patch_explainer.py — Complete, 100%-coverage replacement test suite
