{
  "approach": "Planned th-pia: replace YQ first-print shock gate with an arbitrage posterior from prior log-fair-price density and retail size likelihood. Not implemented: the mandatory toolchain validation step failed and the brief requires immediate return on a failed step.",
  "tried": [],
  "next": "In a subsequent attempt, create scratch/solcx before setting SOLCX_BINARY_PATH to it, then rerun starter validation. No repair or experiment was performed after the required stopping condition.",
  "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 validation command set SOLCX_BINARY_PATH to a checkout-local scratch/solcx directory that had not been created. py-solc-x attempted to open the compiler installation file in that directory. This is a local setup error, not a requester-input requirement.",
    "commands": [
      {
        "command": "git clone https://github.com/benedictbrady/amm-challenge test/scratch/amm-challenge",
        "result": "passed"
      },
      {
        "command": "git checkout 6b6921f8d463314aa7c96234e1be25a25245f704",
        "result": "passed"
      },
      {
        "command": "UV_INSTALL_DIR=$PWD/scratch/uv sh scratch/uv-install.sh",
        "result": "exit 0; installed uv. Installer emitted shell-startup-file warnings."
      },
      {
        "command": "RUSTUP_HOME=$PWD/scratch/rustup CARGO_HOME=$PWD/scratch/cargo sh scratch/rustup-install.sh -y --profile minimal --no-modify-path",
        "result": "passed"
      },
      {
        "command": "uv venv; uv pip install -e . maturin",
        "result": "passed, including pyrevm build"
      },
      {
        "command": "maturin develop --release --uv --manifest-path amm_sim_rs/Cargo.toml",
        "result": "passed"
      },
      {
        "command": "sha256sum scratch/YQ.sol",
        "result": "00fae418c49cd681ad0879c6f96ebed0163fab5a660b38030f11e6947a39afd4"
      },
      {
        "command": "SOLCX_BINARY_PATH=$PWD/scratch/solcx amm-match validate contracts/src/StarterStrategy.sol",
        "result": "failed before contract compilation; traceback from solcx.install_solc"
      }
    ],
    "not_executed": [
      "YQ validation",
      "candidate implementation",
      "candidate validation",
      "tuning on 10000..10499",
      "paired evaluation on 500000..501999",
      "score on 0..999",
      "forge build or tests",
      "Slither and Aderyn (not available on PATH)"
    ]
  },
  "citations": [
    {
      "url": "https://raw.githubusercontent.com/jiayaoqijia/amm-challenge-yq/3e9dc7d5a6192c88b562a0f8d9c172ca566ec94d/contracts/src/Strategy.sol",
      "use": "Downloaded and read YQ source; required SHA-256 matched locally."
    },
    {
      "url": "https://github.com/jiayaoqijia/amm-challenge-yq",
      "use": "Public strategy write-up read: describes adaptive fair-price gating and asymmetric stale-price discount. Published performance numbers were not used as measurements."
    },
    {
      "url": "https://github.com/dipankar/amm-challenge/blob/main/ANALYSIS.md",
      "use": "Public research post-mortem read: discusses state estimation versus trade classification. Its performance claims were not independently verified or used."
    },
    {
      "url": "https://raw.githubusercontent.com/benedictbrady/amm-challenge/6b6921f8d463314aa7c96234e1be25a25245f704/amm_competition/evm/compiler.py",
      "use": "Pinned compiler source read; installs solc 0.8.24 when unavailable."
    }
  ]
}