{
  "question": "does round39 regress CLI decode vs reconstructed round38 on the same machine now?",
  "baseline": "same linked objects with pre-round39 ngram.cpp.o and baseline runtime shader directory",
  "candidate": "current CLI copied and current shader directory snapshot",
  "cases": [
    {
      "prompt": "data/m5_val_prompts/prompt_albedo_11k.txt",
      "n_prompt": 10180,
      "n_gen": 32,
      "warmup_order": [
        "baseline",
        "candidate"
      ],
      "measured_order": [
        "baseline",
        "candidate",
        "candidate",
        "baseline",
        "baseline",
        "candidate"
      ]
    },
    {
      "prompt": "data/m5_val_prompts/prompt_2048tok_ops.txt",
      "n_prompt": 1984,
      "n_gen": 128,
      "measured_order": [
        "baseline",
        "candidate",
        "candidate",
        "baseline"
      ]
    }
  ],
  "decision": "report adjacent-pair ratios and medians; repeated >2% slowdown is regression evidence; isolated/noisy differences remain inconclusive; no broad zero-regression claim",
  "conditions": "all agent cpu suites complete; live service stopped; one model process; identical env except shader path; no source writes during runs",
  "limits": "local only, 12 model launches, per-run timeout180s; no servo/telemetry overhead claim"
}