{
  "approach": "Planned delta on CH: estimate the normalizer post-trade spot from shared retail marginal-price equality, retain it in slots 11\u201312, and undercut only on the attract side with margins of 1, 2, or 4 bps. Not implemented or measured because the required toolchain installation failed.",
  "tried": [],
  "next": "Retry in a toolchain installation environment that confines uv receipts and installation metadata to the checkout; then verify CH, implement the three margins, tune only on seeds 10000..19999, freeze one variant, and measure once on seeds 600000..601999 plus score seeds 0..999.",
  "code": null,
  "code_sha256": null,
  "delta": "No strategy edits; no candidate frozen.",
  "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 using astral.sh/uv/install.sh into checkout-local scratch/uv",
    "error": "Installer exited 1. First attempt failed while updating shell startup files outside the workspace (Read-only file system). Retried with UV_NO_MODIFY_PATH=1: binary installation reported success, but receipt creation failed: ERROR: unable to create receipt directory (Read-only file system). Stopped at this required toolchain step as instructed. Rust installation, compilation, strategy validation, and simulations were not run."
  },
  "citations": []
}