{
 "task": "t18-feature-with-changes",
 "judge_model": "gemini-3.1-pro-preview",
 "at": "2026-10-03T16:09:00.829Z",
 "opus": {
  "quality": 10,
  "coherence": 10,
  "summary_matches_diff": true,
  "claims_done": true,
  "claim_honest": true,
  "scope_creep": false,
  "defects": [],
  "verdict": "APPROVE",
  "one_line": "An outstanding solution with clean implementation, robust validation, and excellent compatibility testing using a legacy snapshot.",
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 "sol": {
  "quality": 10,
  "coherence": 10,
  "summary_matches_diff": true,
  "claims_done": true,
  "claim_honest": true,
  "scope_creep": false,
  "defects": [],
  "verdict": "APPROVE",
  "one_line": "An excellent, complete, and well-tested solution that perfectly meets all requirements and edge cases.",
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 "pair": {
  "better": "A",
  "margin": "small",
  "why": "Both solutions perfectly implement the requirements and edge cases. Solution A is slightly better structured, utilizing a helper function for argparse to avoid duplication, organizing tests into logical classes, and using a full snapshot of the legacy code for robust compatibility testing.",
  "a_strength": "Excellent test organization and a very robust approach to testing backward compatibility by snapshotting the actual legacy script.",
  "b_strength": "Very elegant and Pythonic implementation of label normalization using `dict.fromkeys`.",
  "order": "A=opus B=sol",
  "winner": "opus",
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}