{
  "approach": "Silence-clamp delta on CH: store the post-trade spot in slot 11 and, before the pHat update after a gap k > 1, clamp pHat to the band implied by the previous spot and quoted fees. Planned variants: A clamp after k > 1; B also halve that print's gate; C clamp when k >= 1. These are the supplied hypotheses, not measured findings.",
  "tried": [],
  "next": "Resolve the uv installer temporary-directory failure, then finish the pinned Rust/Python toolchain, verify and validate CH, implement the three variants, tune only on 10000..19999, freeze a candidate, and measure once against CH on 600000..601999 plus score seeds 0..999. No simulations or promotion decisions were made.",
  "code": null,
  "code_sha256": null,
  "delta": "No implementation was produced: toolchain setup stopped at the uv installation failure.",
  "score": {
    "seed_start": 0,
    "n": 0,
    "mean_edge": null,
    "se": null
  },
  "paired": {
    "reference": "CH 6dd68f77",
    "seed_start": 600000,
    "n": 0,
    "mean_diff": null,
    "se": null,
    "worst": []
  },
  "seconds_per_simulation": null,
  "validate_ok": false,
  "blocked": {
    "step": "Install uv via astral.sh/uv/install.sh",
    "error": "Installer exited 1: mktemp: mkdtemp failed on /var/folders/fq/lyn4gkk94xb3qlvgqsfjnhww0000gn/T/tmp.iy0kwKHzHH: Operation not permitted; ERROR: command failed: mktemp -d. TMPDIR had been exported to the workspace test/scratch/tmp before invoking the installer. The repository clone succeeded on retry; cc --version succeeded. Rust installation, pinned checkout, baseline retrieval/hash verification, validation, compilation and measurement were not completed."
  },
  "citations": []
}