{
  "approach": "In `git/diff.py`, modify `_parse_cmdline` to detect `--ext-diff` usage via config and adjust parser selection accordingly. Instead of assuming raw format based solely on `-p`, check if external diff tools interfere with patch parsing and prefer raw format fallback logic.",
  "files_to_edit": [
    "git/diff.py"
  ],
  "finish_reason": "stop",
  "hypothesis": "When `diff.external` is configured, GitPython's internal parsing logic incorrectly assumes raw diff format, causing failures when patches are requested.",
  "retries": {},
  "usage": {
    "completion": 108,
    "prompt": 9597,
    "reasoning": 0
  }
}