{
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  "baseline_commit": "4f8e274bf598fbe674ee08eccccda1fa55655732",
  "candidate": "working tree at invocation; published with its source commit",
  "candidate_source_sha256": {
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  "python_version": "3.14.2",
  "reproduction": "python benchmarks/diagnostics.py --output local-results/decision-diagnostics-ab.json",
  "scope": "Ten fixed synthetic scenarios, three paired repeats through the actual pinned SDK/typed-batch with HTTPMock or injected sanitized ProviderError. Mock model identity and token usage are synthetic, not real inference. Expected diagnostic checks are protocol checks, not AI recovery or semantic accuracy measurements.",
  "negative_results": "Added diagnostics and stage tags increase terminal bytes. Unknown provider codes remain generic. Diagnostic coverage is actual selection calls; static candidate/policy/execution failures keep existing reasons. No live AI recovery trial.",
  "cost_conversion": "Zero outbound model requests and no paid savings claim. HTTP retries are simulated; the pinned provider already retries 429/503/529 up to three network attempts, unchanged here. Timings include task/client construction, loop, callbacks and journal writes; exclude interpreter/import/snapshot setup.",
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