{
  "approach": "Requested phase2 experiment: reduce both NP fees after non-first prints within a step; tune fractions 0.05 through 0.30 on permitted tuning seeds and freeze one candidate for fresh paired measurement. Execution stopped at the mandatory setup failure condition.",
  "tried": [],
  "next": "Resolve the setup archive extraction failure before rerunning the required setup and performing baseline reproduction, tuning, validation, and fresh paired measurement. No candidate was selected or promoted.",
  "code": null,
  "code_sha256": null,
  "delta": null,
  "score": {
    "seed_start": 0,
    "n": 0,
    "mean_edge": null,
    "se": null
  },
  "paired": {
    "reference": "NP",
    "seed_start": 800000,
    "n": 0,
    "mean_diff": null,
    "se": null,
    "worst": []
  },
  "seconds_per_simulation": null,
  "validate_ok": false,
  "blocked": {
    "step": "sh scratch/setup.sh: uv download archive extraction",
    "exit_code": 2,
    "error": "tar: uv-x86_64-unknown-linux-gnu/uv: Cannot change ownership to uid 1001, gid 117: Invalid argument\ntar: uv-x86_64-unknown-linux-gnu/uvx: Cannot change ownership to uid 1001, gid 117: Invalid argument\ntar: uv-x86_64-unknown-linux-gnu: Cannot change ownership to uid 1001, gid 117: Invalid argument\ntar: Exiting with failure status due to previous errors",
    "setup_runs": 1,
    "checkout_commit": "6b6921f8d463314aa7c96234e1be25a25245f704",
    "baseline_reproduced": false,
    "simulations_run": 0,
    "validation_run": false
  },
  "citations": []
}