{
  "approach": "Planned YQ plus a normalizer-spot estimate: initialize with identical spot and invariant; reset to the estimated 30 bps arbitrage band on classified arbitrage; estimate subsequent normalizer movements from router marginal-price equality; lower the favorable-side fee only within a fair-price margin and a per-update clipping limit. This idea was not validated or measured.",
  "tried": [],
  "next": "Create the scratch-local solcx installation directory before running the toolchain in a new attempt; then validate starter and YQ, implement and validate the normalizer estimator, tune margin/clipping on seeds 10000..10499, freeze the candidate, evaluate once paired against YQ on seeds 500000..501999, and score on seeds 0..999. No promotion decision is supported.",
  "code": null,
  "code_sha256": null,
  "delta": null,
  "score": {
    "seed_start": 0,
    "n": 0,
    "mean_edge": null,
    "se": null
  },
  "paired": {
    "reference": "YQ 00fae418",
    "seed_start": 500000,
    "n": 0,
    "mean_diff": null,
    "se": null,
    "worst": []
  },
  "seconds_per_simulation": null,
  "validate_ok": false,
  "blocked": {
    "step": "amm-match validate contracts/src/StarterStrategy.sol",
    "exit_code": 1,
    "error": "FileNotFoundError: [Errno 2] No such file or directory: '<checkout>/scratch/solcx/solc-v0.8.24'",
    "cause": "The scratch-local SOLCX_BINARY_PATH was set, but its parent directory had not been created. The command failed during SolidityCompiler initialization while py-solc-x attempted to install Solidity 0.8.24, before compilation or gas validation. Stopped as explicitly required for any failed toolchain step.",
    "completed_steps": [
      "Clone official repository and checkout 6b6921f8d463314aa7c96234e1be25a25245f704",
      "Install uv and Rust into checkout-local scratch directories",
      "uv venv",
      "uv pip install -e . maturin",
      "maturin develop --release --uv --manifest-path amm_sim_rs/Cargo.toml"
    ],
    "reference_read": {
      "url": "https://raw.githubusercontent.com/jiayaoqijia/amm-challenge-yq/3e9dc7d5a6192c88b562a0f8d9c172ca566ec94d/contracts/src/Strategy.sol",
      "sha256": "00fae418c49cd681ad0879c6f96ebed0163fab5a660b38030f11e6947a39afd4",
      "sha256_verified": true,
      "validate_ok": false
    },
    "measurement_status": "No simulations run. No candidate validated. No score, paired gain, worst-run statistics, or timing estimate is available."
  },
  "citations": [
    {
      "url": "https://raw.githubusercontent.com/jiayaoqijia/amm-challenge-yq/3e9dc7d5a6192c88b562a0f8d9c172ca566ec94d/contracts/src/Strategy.sol",
      "use": "Downloaded and read the supplied reference contract; SHA-256 verified locally."
    },
    {
      "url": "https://raw.githubusercontent.com/benedictbrady/amm-challenge/6b6921f8d463314aa7c96234e1be25a25245f704/amm_competition/evm/compiler.py",
      "use": "Pinned compiler implementation requests Solidity 0.8.24 through py-solc-x."
    },
    {
      "url": "https://www.linkedin.com/pulse/amm-fee-challenge-notes-from-our-run-optimization-arena-qe3ff",
      "use": "Read public write-up describing environment inference and competing-normalizer estimation; no published score was used as a measurement."
    }
  ]
}