{
 "approach": "Trunk layout item. Vendored benedictbrady/amm-challenge @ 6b6921f8d463314aa7c96234e1be25a25245f704 into tools/amm-challenge as plain files (from the codeload tarball; no .git, no submodule), leaving out .gitignore, contracts/foundry.toml, contracts/remappings.txt and contracts/foundry.lock because of the path/config rules (the previous attempt was rejected for tools/amm-challenge/.gitignore). The Python/Rust simulator doesn't use them. Wrote tools/pair.py, a paired per-seed CLI: a copy of MatchRunner._build_configs with a seed offset, SolidityCompiler, the vanilla 30 bps bytecode from evm.baseline, and amm_sim_rs.run_batch, reading edges['submission'] per seed. Also wrote tools/README.md (install/use), best/Strategy.sol (the unchanged 50 bps starter), best/SCOREBOARD.md, README.md (layout + seed rules) and .gitignore. Code = starter; reference = vanilla 30 bps.",
 "changed_files": [
  "tools/amm-challenge/** (60 files, byte-identical to upstream tarball)",
  "tools/pair.py",
  "tools/README.md",
  "best/Strategy.sol",
  "best/SCOREBOARD.md",
  "README.md",
  ".gitignore"
 ],
 "commands_run": [
  "rustup (minimal) into .deps/; python3 -m venv --without-pip .deps/venv + get-pip; pip install maturin numpy py-solc-x pyrevm pytest",
  "cd tools/amm-challenge/amm_sim_rs && maturin develop --release  -> built OK",
  "pip install -e tools/amm-challenge -> amm-match installed",
  "amm-match validate best/Strategy.sol -> 'Strategy StarterStrategy validated successfully!' exit 0",
  "N_WORKERS=32 amm-match run best/Strategy.sol --simulations 1000 -> 'StarterStrategy Edge: 369.45'",
  "python tools/pair.py best/Strategy.sol tools/amm-challenge/contracts/src/VanillaStrategy.sol --seed-start 0 --n 1000 --workers 32 -> mean_a 369.4498 (matches amm-match run exactly), mean_diff 25.849 se 0.278",
  "python tools/pair.py best/Strategy.sol .../VanillaStrategy.sol --seed-start 100000 --n 2000 --workers 32 -> mean_diff 25.879 se 0.208",
  "python tools/pair.py best/Strategy.sol best/Strategy.sol --seed-start 5000 --n 200 -> mean_diff 0.0, se 0.0 (deterministic)",
  "python tools/pair.py A B --seed-start 0 --n 0 -> validate/compile only, OK"
 ],
 "checks": "amm-match run on seeds 0..999 and pair.py give the same mean edge (369.45), so the seed mapping is right. A self-pair gives exactly 0, so runs are deterministic. sha256 of best/Strategy.sol equals upstream StarterStrategy.sol. git status: all 66 staged paths are inside tools/**, best/**, README.md and .gitignore, with no dotfiles, Foundry config, __pycache__, egg-info or Cargo.lock under tools/. Not committed: there is no git identity on this machine and I left git config alone, so the changes are staged in the working tree.",
 "tried": [
  "Checked pair.py against amm-match run on seeds 0..999 (exact match)",
  "Paired starter vs vanilla on 0..999 and 100000..101999",
  "Self-pair determinism check"
 ],
 "next": [
  "Round 1 strategy items: run `pair.py cand.sol best/Strategy.sol --seed-start 100000 --n 2000` and add a row to best/SCOREBOARD.md; promotions should use a new fresh block (e.g. 102000..103999) to keep 100000..101999 for the round-1 vs-starter comparison",
  "Add a --reference vanilla shortcut and a multi-candidate mode to pair.py that reuses B's edges across candidates (halves the cost of a sweep)",
  "Add a CRN-aware tuning helper (grid/coordinate search on seeds 0..99999 that writes a CSV), so tuning items share one harness"
 ],
 "code": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.24;\n\nimport {AMMStrategyBase} from \"./AMMStrategyBase.sol\";\nimport {IAMMStrategy, TradeInfo} from \"./IAMMStrategy.sol\";\n\n/// @title Starter Strategy - 50 Basis Points\n/// @notice A starting point with fixed 50 bps fees. Copy and modify this file.\ncontract Strategy is AMMStrategyBase {\n    uint256 public constant FEE = 50 * BPS;\n\n    function afterInitialize(uint256, uint256) external pure override returns (uint256, uint256) {\n        return (FEE, FEE);\n    }\n\n    function afterSwap(TradeInfo calldata) external pure override returns (uint256, uint256) {\n        return (FEE, FEE);\n    }\n\n    function getName() external pure override returns (string memory) {\n        return \"StarterStrategy\";\n    }\n}\n",
 "code_sha256": "8f2cea337f6736105f58c6758da6c3ebf002951d34492bcd5b7101bef2d1e7f3",
 "score": {
  "seeds": "0..999",
  "n": 1000,
  "mean_edge": 369.4498
 },
 "paired": {
  "reference": "tools/amm-challenge/contracts/src/VanillaStrategy.sol (30 bps, sha256 62d40ccef0de99a385e332a36ddf9cbd1da73eda06bd7954492a9880cb91a572)",
  "seed_start": 100000,
  "n": 2000,
  "mean_a": 369.50130143736396,
  "mean_b": 343.62247188982195,
  "mean_diff": 25.87882954754205,
  "se": 0.20754984232052912,
  "worst": [
   {
    "seed": 100115,
    "diff": 3.384901448892151,
    "edge_a": 285.7548925514002,
    "edge_b": 282.36999110250804
   },
   {
    "seed": 101126,
    "diff": 3.4559822008541516,
    "edge_a": 248.8954386922972,
    "edge_b": 245.43945649144305
   },
   {
    "seed": 101882,
    "diff": 4.01404578757257,
    "edge_a": 254.3324586538496,
    "edge_b": 250.31841286627704
   },
   {
    "seed": 100571,
    "diff": 4.742056669238366,
    "edge_a": 270.96900405953465,
    "edge_b": 266.2269473902963
   },
   {
    "seed": 100907,
    "diff": 4.874159572626581,
    "edge_a": 283.83031211725176,
    "edge_b": 278.9561525446252
   }
  ]
 },
 "paired_tuning_seeds": {
  "seed_start": 0,
  "n": 1000,
  "mean_diff": 25.848793050390185,
  "se": 0.27820794966429446,
  "worst": [
   {
    "seed": 669,
    "diff": 4.3945430086486965,
    "edge_a": 249.96284835403276,
    "edge_b": 245.56830534538406
   },
   {
    "seed": 448,
    "diff": 5.550862670690464,
    "edge_a": 253.52079867575873,
    "edge_b": 247.96993600506826
   },
   {
    "seed": 520,
    "diff": 6.447923262236429,
    "edge_a": 311.90365834854447,
    "edge_b": 305.45573508630804
   },
   {
    "seed": 907,
    "diff": 6.641616845553017,
    "edge_a": 257.8785090365146,
    "edge_b": 251.23689219096156
   },
   {
    "seed": 184,
    "diff": 7.194549531381483,
    "edge_a": 322.1686250736441,
    "edge_b": 314.9740755422626
   }
  ]
 },
 "seconds_per_simulation": 0.01141763315780554,
 "seconds_per_simulation_note": "wall time / (2n) with --workers 32 on a 32-core machine; 2000 pairs take about 46 s",
 "validate_ok": true,
 "citations": [
  "https://github.com/benedictbrady/amm-challenge/tree/6b6921f8d463314aa7c96234e1be25a25245f704",
  "https://www.paradigm.xyz/puzzles/amm"
 ],
 "left": "No strategy work in this item, by design. Changes are staged, not committed (no git identity)."
}