# Explorer Task: Milestone 6 (patch_explainer.py coverage) Explorer 1

## Goal
Analyze `reversecore_mcp/tools/common/patch_explainer.py` and design a testing strategy to improve unit test coverage to >= 75% (ideally 100%).

## Context & Inputs
- Target source file: `reversecore_mcp/tools/common/patch_explainer.py`
- Test file to modify: `tests/unit/tools/common/test_patch_explainer.py`

## Instructions
1. Analyze the structure and logic flow in `reversecore_mcp/tools/common/patch_explainer.py`.
2. Inspect the existing test suite in `tests/unit/tools/common/test_patch_explainer.py`.
3. Plan happy-path and edge-case unit test scenarios, including:
   - Diff binary result checks (status "success" vs other statuses).
   - Heuristics testing in `_generate_explanation` (unhandled paths like integer overflow checks, unsafe API replacements, logic removal).
   - Ghidra decompiler failure cases (when `r2_decompile` returns failure or empty pseudo_c).
   - Auto-injected context (`Context`) support.
4. Document your findings, recommendations, and test designs in `analysis.md` and `handoff.md` inside your working directory `.agents/explorer_m6_1/`.
