{"assessments":[],"deployments":[],"fuzz":[],"identity":{"adapter":"0xde152afb7db5373f34876e1499fbd893a82dd336","chainId":1,"collection":"0x0000ec93127baa929e58e97dd0095a2bfb38ec1d","registry":"0x8004a169fb4a3325136eb29fa0ceb6d2e539a432"},"interpretation":"Records acceptance and evidence. Neither completion nor an AI assessment establishes correctness, safety, or independent review.","jobId":"268d9b25-5312-415e-92dd-62292f792154","kind":"goal","nodes":[{"acceptedSubmissionHash":"695652001dc018605dd7c58c422e038c12ebe774da474e7dc71a826072183f33","dependsOn":[],"execution":{"network":true,"profile":"none","requires":["network","worker:0.1.5"],"skillHash":"6cea051a0232ef22829dedd4fb599161d20cd94f0aeb6472e890d31d914d4178","skillId":"goal-task","subagents":4,"tools":[]},"key":"item_0001","kind":"code","role":"implement","skillHash":"6cea051a0232ef22829dedd4fb599161d20cd94f0aeb6472e890d31d914d4178","skillId":"goal-task","state":"accepted"},{"acceptedSubmissionHash":"c509c1925d9ef9727ec1b795ff87cf12701d89f8b346cd622d8565c7330c91c4","dependsOn":[],"execution":{"network":true,"profile":"none","requires":["network","worker:0.1.5"],"skillHash":"6cea051a0232ef22829dedd4fb599161d20cd94f0aeb6472e890d31d914d4178","skillId":"goal-task","subagents":4,"tools":[]},"key":"item_0002","kind":"code","role":"implement","skillHash":"6cea051a0232ef22829dedd4fb599161d20cd94f0aeb6472e890d31d914d4178","skillId":"goal-task","state":"accepted"},{"acceptedSubmissionHash":"05fd68abc139318814f75da53a95ae53170cd69b9a80181be43830a0c922ba8f","dependsOn":[],"execution":{"network":true,"profile":"none","requires":["network","worker:0.1.5"],"skillHash":"6cea051a0232ef22829dedd4fb599161d20cd94f0aeb6472e890d31d914d4178","skillId":"goal-task","subagents":4,"tools":[]},"key":"item_0003","kind":"code","role":"implement","skillHash":"6cea051a0232ef22829dedd4fb599161d20cd94f0aeb6472e890d31d914d4178","skillId":"goal-task","state":"accepted"},{"acceptedSubmissionHash":"1f02bfd22610d26a08ed9b29d1d030a9ad1a2306340dde39c51226cf4fe79563","dependsOn":[],"execution":{"network":true,"profile":"none","requires":["network","worker:0.1.5"],"skillHash":"6cea051a0232ef22829dedd4fb599161d20cd94f0aeb6472e890d31d914d4178","skillId":"goal-task","subagents":4,"tools":[]},"key":"item_0004","kind":"code","role":"implement","skillHash":"6cea051a0232ef22829dedd4fb599161d20cd94f0aeb6472e890d31d914d4178","skillId":"goal-task","state":"accepted"},{"acceptedSubmissionHash":"1aeed44ed48ed2c55f796633f2320eabcf6261935447803cdad7c585c2777228","dependsOn":[],"execution":{"network":true,"profile":"none","requires":["network","worker:0.1.5"],"skillHash":"6cea051a0232ef22829dedd4fb599161d20cd94f0aeb6472e890d31d914d4178","skillId":"goal-task","subagents":4,"tools":[]},"key":"item_0005","kind":"code","role":"implement","skillHash":"6cea051a0232ef22829dedd4fb599161d20cd94f0aeb6472e890d31d914d4178","skillId":"goal-task","state":"accepted"},{"acceptedSubmissionHash":"c797f9ad038eb7cb08829a5f88fdbd8d0405ddd5cde1b51b94e1d74c1424ad10","dependsOn":[],"execution":{"network":true,"profile":"none","requires":["network","worker:0.1.5"],"skillHash":"6cea051a0232ef22829dedd4fb599161d20cd94f0aeb6472e890d31d914d4178","skillId":"goal-task","subagents":4,"tools":[]},"key":"item_0006","kind":"code","role":"implement","skillHash":"6cea051a0232ef22829dedd4fb599161d20cd94f0aeb6472e890d31d914d4178","skillId":"goal-task","state":"accepted"},{"acceptedSubmissionHash":"f2470ea646caf8111ce60840a8dca3beeb47cd76c6d39f7434c9623fb7b6799f","dependsOn":["writeup"],"execution":{"network":true,"profile":"none","requires":["network","worker:0.1.6"],"skillHash":"c95f23fc62b002f17a8bcbfb019fe6e29cf5cabad5405c40bb768df994283126","skillId":"goal-judge","tools":[]},"key":"judge","kind":"code","role":"review","skillHash":"c95f23fc62b002f17a8bcbfb019fe6e29cf5cabad5405c40bb768df994283126","skillId":"goal-judge","state":"accepted"},{"acceptedSubmissionHash":"3bfebe0320fee4cbb456592e9145dcaf6ac1c39b3ad2368bdb1ea35eee1da942","dependsOn":[],"execution":{"network":true,"profile":"none","requires":["network","worker:0.1.5"],"skillHash":"6cea051a0232ef22829dedd4fb599161d20cd94f0aeb6472e890d31d914d4178","skillId":"goal-task","subagents":4,"tools":[]},"key":"writeup","kind":"code","role":"implement","skillHash":"6cea051a0232ef22829dedd4fb599161d20cd94f0aeb6472e890d31d914d4178","skillId":"goal-task","state":"accepted"}],"objective":"Make the AMM simulator wheels reproducible, so a wheel's sha256 can be checked against independent builds wherever it is hosted. Goal 00b9cdc8 built wheels of amm_sim_rs from github.com/benedictbrady/amm-challenge at 6b6921f8d463314aa7c96234e1be25a25245f704 on four machines: all passed the gates, but no two were byte-identical (wheel B 727916 to 727933 bytes). Likely causes: build paths embedded in the binary, the wheel's zip timestamps, and no committed Cargo.lock. This goal pins those and measures whether builds match, within one machine across two checkout paths and across machines. Nothing is submitted anywhere; never download any wheel.\nToolchain, all under the workspace's .cache/ folder (TMPDIR, RUSTUP_HOME, CARGO_HOME, UV_CACHE_DIR, UV_PYTHON_INSTALL_DIR, SOLCX_BINARY_PATH, ZIG_GLOBAL_CACHE_DIR in .cache/tc): uv from https://github.com/astral-sh/uv/releases/latest/download/uv-x86_64-unknown-linux-gnu.tar.gz (another platform: its own uv archive), tar --no-same-owner; uv venv --python 3.12; uv pip install maturin==1.16.0 ziglang==0.17.1 numpy py-solc-x==2.1.0 pyrevm==0.3.7. Rust: the rustup script with -y --profile minimal --no-modify-path --default-toolchain none, then rustup toolchain install 1.99.1 --profile minimal, RUSTUP_TOOLCHAIN=1.99.1, rustup target add x86_64-unknown-linux-gnu.\nEvery build: SOURCE_DATE_EPOCH = the commit's time (git log -1 --format=%ct), CARGO_INCREMENTAL=0, RUSTFLAGS=\"--remap-path-prefix=<checkout>=/src --remap-path-prefix=<CARGO_HOME>=/cargo --remap-path-prefix=<RUSTUP_HOME>=/rustup\" with absolute paths, and maturin build --release --strip --locked --zig --target x86_64-unknown-linux-gnu --compatibility manylinux2014 --features pyo3/abi3-py310 --manifest-path amm_sim_rs/Cargo.toml --out <dir>. The commit has no Cargo.lock: generate one with cargo generate-lockfile --manifest-path amm_sim_rs/Cargo.toml and use that same file in every checkout. Wheel A = the commit unchanged. Wheel B = plus scratch/instrumentation.patch from the source_files of https://api.imd.fun/artifacts/02c134d9ed51858f06d02b6dec25e6922016490f11e3a8174af512a6a77b6569 (git apply) and version = \"0.1.0.post1\" in amm_sim_rs/pyproject.toml.\nFor comparison only: Taylor's reference release lists A 11fcc2748d430bc73c5acb107ca1fab9a6719b86bc2b0960c9cbcc374b6eba4e and B 6c6a439e3aff01fe014123559ec5c1b6414b515a74cbe0402a31ded19716bfce.","parentJobId":null,"planHash":"5848f4c7f9493012c026023cd26fc42802ce44d2765cb724c782d86fb76aa19b","previousHash":"0000000000000000000000000000000000000000000000000000000000000000","projectId":"268d9b25-5312-415e-92dd-62292f792154","publication":{"commit":null,"deliveredAt":null,"repoUrl":null},"receiptIdentity":{"adapter":"0xde152afb7db5373f34876e1499fbd893a82dd336","chainId":1,"collection":"0x0000ec93127baa929e58e97dd0095a2bfb38ec1d","registry":"0x8004a169fb4a3325136eb29fa0ceb6d2e539a432"},"registry":"0xb6d0a187b050fa5bb0b87033a203f37becf4a775","research":[],"schema":"identitymd-work-v1","signals":[],"site":null,"snapshotHash":"290286cb5205117d179d9077719c91dabcf1038e8341a3d113e7c0f257cd0c89","state":"completed","submissions":[{"artifacts":[{"bytes":30807,"hash":"cf6afa0a763e325e659f336bcc4b923715d3d2fe3dab1207efaa98a84a88236c","mediaType":"application/json","name":"result","path":"artifacts/goal/items/r3/result.json"},{"bytes":799,"hash":"67aa55fc054ca8a40f8bbf1fa52a39feeb4ea707514ebf6e5a5d70e09bf93aeb","mediaType":"application/json","name":"sources","path":"artifacts/goal/items/r3/sources.json"}],"attempt":1,"bundleHash":null,"device":"c2e167266d13dcf4","findings":[],"hash":"05fd68abc139318814f75da53a95ae53170cd69b9a80181be43830a0c922ba8f","nodeId":"a6daa868-f979-46b2-b848-c18cddb479eb","outcome":"completed","summary":"Item r3 is finished: all four wheels built, and every gate value matched. The builds are still not byte-identical across the two checkout paths, for A or for B, but the cause comes down to a single file.\n\n**Builds** (rustc 1.99.1, maturin 1.16.0, zig 0.17.1, uv 0.13.7, Python 3.12.3; SOURCE_DATE_EPOCH 1770505944; Cargo.lock sha256 `b5efc7f1…690b`, the same file in both checkouts):\n\n| path | A sha256 / bytes | B sha256 / bytes |\n|---|---|---|\n| p1 | `5d38353c…3c13` / 719300 | `265cedf8…82b4` / 727738 |\n| p2 | `ec8009f8…4c81` / 719312 | `99b761b9…6ca0` / 727750 |\n\n**Why they differ:** the compiled `.so` is byte-identical across the two paths for both A and B, so the path remapping works. The zip timestamps also match. The only difference is the software bill of materials (SBOM) file that maturin adds to the wheel, `dist-info/sboms/amm_sim_rs.cyclonedx.json`. It records the absolute checkout path in three places, which adds up to 21 bytes. `RECORD` differs only because it holds the SBOM's hash. Since the `.so` files match, there was no `strings` diff to report. As the brief said, I didn't try any fixes.\n\n**Taylor's reference:** neither A nor B matches it. Because the SBOM embeds the builder's checkout path, a match would probably need that same absolute path. That is my inference; I didn't test it.\n\n**Gate** (ran here on Linux x86_64 with p1's wheels):\n- **CH vs VanillaStrategy, seeds 0..999:** the mean edge is `525.5258821780834` with both A and B, as required.\n- **V2 with B:** afterSwap calls 21580, oog 3, max_ok_gas 243554, afterInitialize max 236377, all as required. The harness exits with code 2, which is how it flags a run with an out-of-gas error, so that is expected for V2.\n\n**Things that depart from the brief's schema or setup:**\n- **Cargo.lock text:** the lock file alone is 75,461 bytes, more than the 64,000-byte result limit. So `cargo_lock.text` is `null`, and the whole file is in `cargo_lock.text_gzip_base64` (it decodes back exactly, and you can check it against the sha256). A note in the result says this.\n- **Redacted paths:** absolute machine paths are written as `<workspace>` in the result.\n- **Python:** `uv venv --python 3.12` used the host's CPython 3.12.3 rather than downloading its own.\n- **Build order:** the p1 and p2 builds ran at the same time, and each B build reused its checkout's build folder from the A build.\n\nI deleted `.cache/`, so only the two output files are left.\n\nFiles are in `artifacts/goal/items/r3`:\n- result.json (30,807 bytes)\n- sources.json (four sources, each with a short exact quote)","treeHash":"4b825dc642cb6eb9a060e54bf8d69288fbee4904","usage":{"cachedInputTokens":808036,"cost":{"source":"runtime","usdMicros":986227},"inputTokens":41,"model":"claude-opus-5-5","outputTokens":21504,"runtime":"claude","turns":23,"wallClockMs":336245}},{"artifacts":[{"bytes":38173,"hash":"b484c4f0bc3c3ce87884149766dc8c22323a5b29b91eb87fb6b41830d7afc26c","mediaType":"application/json","name":"result","path":"artifacts/goal/items/r5/result.json"},{"bytes":759,"hash":"258f727840a2a85d6e079ddccbc7f979bb70a9cacc8ea0448274008937501e3a","mediaType":"application/json","name":"sources","path":"artifacts/goal/items/r5/sources.json"}],"attempt":2,"bundleHash":null,"device":"e8d1aeb6b1315bb1","findings":[],"hash":"1aeed44ed48ed2c55f796633f2320eabcf6261935447803cdad7c585c2777228","nodeId":"7d39892a-db50-49b2-862d-ed44f1791825","outcome":"completed","summary":"I finished item r5 in about 26 minutes. The wheels are not byte-identical between the two checkout paths, for either A or B, but the compiled library inside them is. All three gate checks give the expected values.\n\n**Builds**\n| path | A sha256 / bytes | B sha256 / bytes |\n|---|---|---|\n| p1 | `f4e5f7fd…829e78` / 719300 | `83690eef…829e78`… see file: `83690eefd7c3…2f11d` / 727737 |\n| p2 | `d97b521a…c2f24f` / 719312 | `cea05bdf…735c5b` / 727750 |\n\n- **What differs:** only the SBOM file maturin 1.16.0 puts in the wheel (`dist-info/sboms/amm_sim_rs.cyclonedx.json`), plus its line in RECORD. The SBOM contains the absolute checkout path in 3 places. That path is the whole 12-byte (A) and 13-byte (B) size difference.\n- **What matches:** the `.so`, `__init__.py`, METADATA and WHEEL are byte-identical across paths. All zip timestamps equal SOURCE_DATE_EPOCH (1770505944). Since the `.so` doesn't differ, there are no `strings -n 8` lines to report. As the brief says, I tried no fix.\n- **Reference:** none of the wheels equals Taylor's A or B hash. That's expected while the SBOM carries a machine's path. I couldn't check whether the `.so` inside the reference wheels matches ours, because downloading wheels was not allowed.\n- **Cargo.lock:** sha256 `a180854c…dfeed3cc65`, 75,461 bytes, the same file in both checkouts. It's bigger than the 64,000-byte result limit, so the result holds it gzip+base64-encoded rather than as plain text. I checked that it decodes back to the same sha256.\n\n**Gate (Linux x86_64, p1 wheels)**\n- **CH:** the mean edge is `525.5258821780834` with both A and B, as expected. My first single run of all 1,000 seeds was killed by the host (exit 137, about 8 GB RAM). I re-ran it as ten batches of 100 seeds and took the mean over all seeds in order.\n- **V2 with B:** 21580 afterSwap calls, 3 OOG, max_ok_gas 243554, afterInitialize max 236377. All match. The harness exits with code 2 by design, because the out-of-gas halts make the run invalid.\n\n**Versions:** rustc 1.99.1, maturin 1.16.0, zig 0.17.1, Python 3.12.16, uv 0.13.7.\n\n**Deviations:**\n- **No C compiler:** this machine has no `cc`, so the first build failed linking build scripts. I added a `cc` shim that calls maturin's own zig wrapper. It only affects host build tools, and the `.so` came out identical across paths.\n- **Second checkout:** the p2 checkout was cloned from the local p1 clone rather than from GitHub, at the same commit.\n\nAll of this is in `result.json`, with the notes and timings. `sources.json` has 4 sources, and I re-checked two of their quotes against the live pages. I deleted the `.cache/` work folder, so only the two output files under `artifacts/goal/items/r5/` remain.","treeHash":"4b825dc642cb6eb9a060e54bf8d69288fbee4904","usage":{"cachedInputTokens":1432641,"cost":{"source":"runtime","usdMicros":1354117},"inputTokens":64,"model":"claude-opus-5-5","outputTokens":27223,"runtime":"claude","turns":41,"wallClockMs":1510795}},{"artifacts":[{"bytes":31591,"hash":"596d88b1fc1dbb925f7b60ff463da15b194c67aad31dfa405ef0a01085b2b704","mediaType":"application/json","name":"result","path":"artifacts/goal/items/r4/result.json"},{"bytes":1165,"hash":"219790676cb5651189eab2396a5d30dc5c3e1bd2b6e0a42e273b885e70bead7e","mediaType":"application/json","name":"sources","path":"artifacts/goal/items/r4/sources.json"}],"attempt":1,"bundleHash":null,"device":"fa2b0b9c7ebc1547","findings":[],"hash":"1f02bfd22610d26a08ed9b29d1d030a9ad1a2306340dde39c51226cf4fe79563","nodeId":"e619e2d0-2950-4164-baba-ea79bcabd9ba","outcome":"completed","summary":"Item r4 is finished. The wheels are **not** byte-identical across the two checkout paths, for A or for B. The cause is one file in the wheel: the compiled `.so` is the same in both paths.\n\n**Results**\n\n| | p1 | p2 |\n|---|---|---|\n| Wheel A | `5f4785c0…5f4b`, 719308 bytes | `b0a834d2…ff28`, 719319 bytes |\n| Wheel B | `f5ee255c…0664`, 727746 bytes | `89e93247…009e`, 727756 bytes |\n\n- **What differs:** in both A and B, `amm_sim_rs.abi3.so`, `METADATA`, `WHEEL` and `__init__.py` are identical between the paths, and every zip entry is dated by `SOURCE_DATE_EPOCH` (1770505944). That means there is no `strings -n 8` difference to list.\n- **Cause:** maturin's SBOM (`dist-info/sboms/amm_sim_rs.cyclonedx.json`) writes the absolute checkout path into 3 `bom-ref`/`ref` lines, and the path prefix remapping doesn't touch it. That makes the SBOM 307947 vs 307968 bytes, which in turn changes its line in `RECORD`. As the brief asked, I reported this and didn't try a fix.\n- **Reference:** neither p1 wheel matches Taylor's reference hashes. Any build made in a different checkout path will carry a different SBOM, so it can't match byte for byte even when the `.so` is identical.\n- **Gate (ran, using p1's wheels):** every figure matches the brief.\n  - CH vs VanillaStrategy, seeds 0..999: mean edge `525.5258821780834` with both A and B.\n  - V2 with B: afterSwap calls 21580, oog 3, max_ok_gas 243554, afterInitialize max 236377.\n  - The harness exits with code 2 here. That is by design: it marks any run with an out-of-gas error as invalid.\n- **Versions:** rustc 1.99.1, maturin 1.16.0, zig 0.17.1, Python 3.12.16, uv 0.13.7. The CH and V2 sources hashed to the expected sha256 values.\n\n**Cargo.lock:** sha256 `b5efc7f1…690b`. I generated it once in p1 and copied it unchanged to p2. The whole file is 75461 bytes, more than the 64000-byte limit for `result.json`. So `text` is `null`, and the exact file is in `text_xz_base64` (xz plus base64). I checked that decoding it gives back the same sha256.\n\nWorkspace paths are written as `<workspace>` in the result. I deleted `.cache/` afterwards, so only the two output files are left. Both parse as JSON. I re-fetched all 6 source URLs and each quote was found on its page.\n\nFiles are in `artifacts/goal/items/r4/`:\n- `result.json`\n- `sources.json`","treeHash":"4b825dc642cb6eb9a060e54bf8d69288fbee4904","usage":{"cachedInputTokens":986247,"cost":{"source":"runtime","usdMicros":1104879},"inputTokens":49,"model":"claude-opus-5-5","outputTokens":22357,"runtime":"claude","turns":26,"wallClockMs":440305}},{"artifacts":[],"attempt":1,"bundleHash":null,"device":"6ed09c2eb1ff6aec","findings":[],"hash":"30bdb875178e6c65542914b06666eee9707888832ff1da142be259e2820435f4","nodeId":"7d39892a-db50-49b2-862d-ed44f1791825","outcome":"failed","summary":"wall-clock budget exhausted","treeHash":null,"usage":{"cachedInputTokens":1909976,"cost":{"source":"estimated","usdMicros":530435},"inputTokens":80,"model":"claude-sonnet-5","outputTokens":14828,"runtime":"claude","turns":0,"wallClockMs":6901140}},{"artifacts":[{"bytes":13357,"hash":"302b9e38904533eb39de5f63bf6ba84514d52603dd37cce2b9a49539d70aecbb","mediaType":"text/markdown","name":"report","path":"artifacts/goal/writeup/report.md"}],"attempt":1,"bundleHash":null,"device":"74979c69cdd583ad","findings":[],"hash":"3bfebe0320fee4cbb456592e9145dcaf6ac1c39b3ad2368bdb1ea35eee1da942","nodeId":"ab51a00b-f6f3-474c-911c-d8d9e5e8644f","outcome":"completed","summary":"13,357 bytes — well within the 64,000-byte limit.\n\nThe report is written to `artifacts/goal/writeup/report.md`. Summary of findings: builds are still not reproducible — all 12 wheel-A and all 12 wheel-B sha256 values (6 results × 2 checkout paths) are distinct, with the CycloneDX SBOM's embedded absolute checkout path identified by every result as the sole cause (the compiled `.so` itself is byte-identical in 4 of 6 results). The report includes the full per-result sha256 table, the Cargo.lock mismatch (5 of 6 match, r5 differs), identical gate results across all 6, the fact that none match Taylor's reference hashes, the build command, a recommended next fix (make the SBOM path-independent), and the required reliability caveat on r2/r4's source citations.","treeHash":"4b825dc642cb6eb9a060e54bf8d69288fbee4904","usage":{"cachedInputTokens":4731114,"cost":{"source":"runtime","usdMicros":2317747},"inputTokens":44,"model":"claude-sonnet-5","outputTokens":42084,"runtime":"claude","turns":56,"wallClockMs":504984}},{"artifacts":[{"bytes":29714,"hash":"6a68f7dabc75f78b14f6d7613805c986bc1ac8e10b2b5411fd1f050b853e4660","mediaType":"application/json","name":"result","path":"artifacts/goal/items/r1/result.json"},{"bytes":559,"hash":"9a6c5138f1cbd86a8396138addad232101b7d8b098a9769c4e98246e41bac090","mediaType":"application/json","name":"sources","path":"artifacts/goal/items/r1/sources.json"}],"attempt":1,"bundleHash":null,"device":"fa99051b60a858d6","findings":[],"hash":"695652001dc018605dd7c58c422e038c12ebe774da474e7dc71a826072183f33","nodeId":"b6c910f8-324d-40da-acbd-1eafa79a7f7e","outcome":"completed","summary":"The two checkout paths still produce different wheels, but the compiled binary is identical in both. All gates passed with p1's wheels. Results are in `artifacts/goal/items/r1/result.json` and both JSON files parse.\n\n**Builds** (`SOURCE_DATE_EPOCH` = 1770505944, Rust 1.99.1, maturin 1.16.0, zig 0.17.1, Python 3.12.3, uv 0.13.7):\n\n| | A sha256 | A bytes | B sha256 | B bytes |\n|---|---|---|---|---|\n| p1 | 7b1f581a… | 719300 | 59289af6… | 727737 |\n| p2 | 23e17a55… | 719313 | 8eb1b0ae… | 727750 |\n\n- **Why A and B differ between paths:** maturin adds a software bill of materials file to each wheel (`dist-info/sboms/amm_sim_rs.cyclonedx.json`). It records the absolute checkout path in 3 places. The `RECORD` file then differs only in that file's hash and size. The 13-byte size gap is the longer path name.\n- **What already matches:** the `.so`, `__init__.py`, `METADATA` and `WHEEL` are byte-identical across the two paths. So the `--remap-path-prefix` flags kept the build paths out of the binary, and since the `.so` doesn't differ there are no `strings -n 8` differences to list. The zip timestamps are pinned too: every entry is dated 26-Feb-07 23:12.\n- **Reference:** none of the wheels match Taylor's reference hashes for A or B. As the brief asked, I only report this and tried no fixes.\n\n**Cargo.lock:** sha256 b5efc7f1…690b, 311 packages, the same file in both checkouts. The brief asks for the whole file in the result, but it is 75461 bytes and the result limit is 64000. So `text` is null and the file is included as xz-compressed base64 in `text_xz_base64`. I checked that it decodes back to the same sha256.\n\n**Gate:**\n- CH mean edge is `525.5258821780834` with both A and B, as required.\n- V2 (sha256 28417e11…) with B: afterSwap calls 21580, oog 3, max_ok_gas 243554, afterInitialize max 236377, all as expected. The harness marks the run invalid because of the 3 out-of-gas calls, which is the expected outcome.\n\n**Notes:**\n- `uv venv --python 3.12` used the machine's existing Python 3.12.3 instead of downloading one.\n- The workspace's absolute paths are replaced with `<workspace>` in the result.\n- `sources.json` cites the two api.imd.fun artifacts and CH's Strategy.sol. Each quote was checked against the downloaded copy.\n\nEverything else stayed under `.cache/`.","treeHash":"4b825dc642cb6eb9a060e54bf8d69288fbee4904","usage":{"cachedInputTokens":1009424,"cost":{"source":"runtime","usdMicros":899513},"inputTokens":53,"model":"claude-opus-5-5","outputTokens":17430,"runtime":"claude","turns":31,"wallClockMs":341868}},{"artifacts":[{"bytes":34182,"hash":"901d5f7fc24ab2189d04d2c833877ede8f9de42562922fa8e639b16c74888608","mediaType":"application/json","name":"result","path":"artifacts/goal/items/r2/result.json"},{"bytes":971,"hash":"91daba30dc3da01782e07bb889e77cf265c08dccaefd0ea5726b9361a47116f8","mediaType":"application/json","name":"sources","path":"artifacts/goal/items/r2/sources.json"}],"attempt":1,"bundleHash":null,"device":"fbcdfc017217af1f","findings":[],"hash":"c509c1925d9ef9727ec1b795ff87cf12701d89f8b346cd622d8565c7330c91c4","nodeId":"f77d48a1-3ad4-4bf9-853a-bd535b4b10bc","outcome":"completed","summary":"All four wheels built, but neither wheel A nor wheel B matched between the two checkout paths. The compiled binary isn't the cause: it is byte-identical. Both gates passed with p1's wheels.\n\n**Builds** (SOURCE_DATE_EPOCH 1770505944; Cargo.lock sha256 `b5efc7f1aaf2c92fafa2015404ff74f760b80135a9e16bacded7f4ba0c81690b`)\n\n| path | A sha256 | A bytes | B sha256 | B bytes |\n|---|---|---|---|---|\n| p1 | `a3e13ef7…f638` | 719299 | `8ac9252d…4287` | 727735 |\n| p2 | `36dbe93f…bc4c` | 719310 | `46c08d19…98cf` | 727748 |\n\n**Why they differ:** I unzipped both pairs and compared them file by file.\n- The `.so`, `__init__.py`, `METADATA` and `WHEEL` are byte-identical between p1 and p2, for both A and B. Because the `.so` is identical, `strings -n 8` shows no differing lines.\n- All zip timestamps are 2026-02-07 23:12:24, which comes from SOURCE_DATE_EPOCH.\n- The only real difference is the software bill of materials that maturin adds to every wheel (`dist-info/sboms/amm_sim_rs.cyclonedx.json`). It contains the absolute checkout path in three places, and the RUSTFLAGS path remapping doesn't reach it. `RECORD` then differs only by that file's hash and size.\n- So with paths and timestamps pinned, the checkout path is the one remaining thing that changes the wheel's sha256. Neither wheel matches Taylor's reference hashes; that comparison is for reference only. As the brief said, I didn't try any fix.\n\n**Gates** (run with p1's wheels on this Linux x86_64 host):\n- **CH:** mean edge was 525.5258821780834 with both A and B, as required.\n- **V2 with B:** afterSwap calls 21580, oog 3, max_ok_gas 243554; afterInitialize max 236377. All four match. The harness exits with code 2 here because the out-of-gas calls mark the run invalid; that is what the brief expects.\n\n**Cargo.lock size:** the file is 75461 bytes, more than the 64000-byte result limit. So `cargo_lock.text` is null, and the exact file is included gzip-compressed and base64-encoded under `cargo_lock.gzip_base64` (25 KB). Decompressing it gives back the file with the sha256 above.\n\nAbsolute paths in the result are shown as `<workspace>`. I removed `.cache/` afterwards, so only the two output files are left. `sources.json` lists 5 sources, and I checked each quote against the downloaded copy of its page. No wheel was downloaded and nothing was submitted.\n\nFiles are in `artifacts/goal/items/r2/`:\n- result.json (34182 bytes)\n- sources.json","treeHash":"4b825dc642cb6eb9a060e54bf8d69288fbee4904","usage":{"cachedInputTokens":896264,"cost":{"source":"runtime","usdMicros":907639},"inputTokens":42,"model":"claude-opus-5-5","outputTokens":16175,"runtime":"claude","turns":22,"wallClockMs":322109}},{"artifacts":[{"bytes":33346,"hash":"5e25f9d8e567d42c3c789ea61dca49647b76912cf0cd6cefd457cb0ffe19223d","mediaType":"application/json","name":"result","path":"artifacts/goal/items/r6/result.json"},{"bytes":908,"hash":"f69d444d2b3bc15b2b49f90aa3ba0b804e1517fd58afc6c463e3f4449dc39e2d","mediaType":"application/json","name":"sources","path":"artifacts/goal/items/r6/sources.json"}],"attempt":1,"bundleHash":null,"device":"e12f98dda6acc55f","findings":[],"hash":"c797f9ad038eb7cb08829a5f88fdbd8d0405ddd5cde1b51b94e1d74c1424ad10","nodeId":"4552f713-f074-4dcb-b485-0a9016040b70","outcome":"completed","summary":"Item r6 is done. Within this one machine, the two checkout paths still produce different wheels for both A and B. The cause is a single file: the software bill of materials (SBOM) that maturin adds to the wheel. All the gate numbers matched.\n\n**Builds**\n- **Wheel A:** p1 `bb4dbf09…` (719297 bytes), p2 `b62f633a…` (719311 bytes).\n- **Wheel B:** p1 `2c09fe3a…` (727736 bytes), p2 `03e8e082…` (727747 bytes).\n- **Settings:** builds used `SOURCE_DATE_EPOCH=1770505944` and the same Cargo.lock in both checkouts (sha256 `b5efc7f1…`).\n- **Speed:** wheel A took about 18 s and wheel B about 9 s. B was quicker because its dependencies were already compiled.\n\n**What differs between the paths**\n- `amm_sim_rs.abi3.so`, `__init__.py`, `METADATA` and `WHEEL` are byte-identical across the two paths for both wheels. Because the .so files match, `strings -n 8` had no differing lines to list. All zip timestamps are pinned to the commit time.\n- The only difference is `dist-info/sboms/amm_sim_rs.cyclonedx.json`, plus `RECORD`, which holds its hash. Three lines in it contain `path+file://<absolute checkout>/amm_sim_rs#0.1.0`, and `--remap-path-prefix` doesn't reach that file. So a wheel's sha256 depends on the absolute checkout path. I only recorded this and tried no other fix, as the brief said.\n- Neither wheel matches Taylor's reference hashes. That fits with the SBOM path and with a Cargo.lock generated today, which may pick newer crate versions.\n\n**Gate (p1's wheels, which run on this Linux x86_64 host)**\n- **CH mean edge:** `525.5258821780834` with both A and B, as expected.\n- **V2 with B:** afterSwap calls 21580, out-of-gas 3, max_ok_gas 243554; afterInitialize max 236377. All as expected.\n\n**Things to know about the result file**\n- **Cargo.lock isn't included as plain text.** The whole file is 75461 bytes, more than the 64000-byte limit for the result. It's stored in `cargo_lock.gzip_base64` instead; I checked that decoding it gives the same sha256.\n- **Paths are masked.** This machine's absolute workspace path is replaced with `<workspace>` throughout.\n- **The two checkouts were built at the same time,** each with its own build directory.\n\n**Versions:** rustc 1.99.1, maturin 1.16.0, zig 0.17.1, Python 3.12.3, uv 0.13.7.\n\nI deleted `.cache/` afterwards. No wheel was downloaded and nothing was uploaded.\n\nFiles are in `artifacts/goal/items/r6/`:\n- result.json\n- sources.json","treeHash":"4b825dc642cb6eb9a060e54bf8d69288fbee4904","usage":{"cachedInputTokens":1082794,"cost":{"source":"runtime","usdMicros":977573},"inputTokens":54,"model":"claude-opus-5-5","outputTokens":19027,"runtime":"claude","turns":31,"wallClockMs":324893}},{"artifacts":[],"attempt":1,"bundleHash":null,"device":"e8d1aeb6b1315bb1","findings":[{"description":"Section 'Root cause and differences' / 'Next fix to try' says the SBOM could be made path-independent 'by disabling maturin's SBOM generation for this build (if maturin 1.16.0 exposes such a flag)'. maturin 1.16.0 does expose it and documents it: guide/src/sbom.md at tag v1.16.0, section 'Disabling SBOM generation', states that `[tool.maturin.sbom]\\nrust = false` in pyproject.toml disables the Rust CycloneDX SBOM, and src/sbom.rs at the same tag (SbomData::generate) returns an empty SBOM list when `context.artifact.sbom.rust` is false. The same source also shows that with SOURCE_DATE_EPOCH set cargo-cyclonedx 0.5.9 (generator.rs, pinned by maturin 1.16.0) drops the random serialNumber and fixes metadata.timestamp, so the embedded checkout path really is the only remaining variable in the SBOM; the report does not say this either, so its claim that the path is 'the one remaining, fully identified cause' is left resting on the 6 diffs alone. Because the report is the requester's basis for choosing the next step, presenting a documented two-line configuration as an open question understates what is known and may send the requester to the heavier alternatives (bind-mount, post-hoc normalisation) first.","line":null,"path":null,"reproduction":"Claim as written (report, 'Next fix to try'): 'disabling maturin's SBOM generation for this build (if maturin 1.16.0 exposes such a flag)'. Source: https://raw.githubusercontent.com/PyO3/maturin/v1.16.0/guide/src/sbom.md -> heading 'Disabling SBOM generation': 'To disable Rust SBOM generation: [tool.maturin.sbom] rust = false'. https://raw.githubusercontent.com/PyO3/maturin/v1.16.0/src/sbom.rs lines 29-38: `let rust_sbom_enabled = context.artifact.sbom.rust.unwrap_or(true); ... if !rust_sbom_enabled { return Ok(Some(SbomData { rust_sboms: Vec::new() })) }`. Expected: the report names this switch (and notes it changes pyproject.toml, so it is compatible with wheel B as specified and would need to be accepted as a deviation for wheel A). Actual: the report says the flag's existence is unknown. Empirical check on this machine (maturin 1.16.0, rustc/cargo 1.99.1, zig 0.17.1, SOURCE_DATE_EPOCH=1770505944, CARGO_INCREMENTAL=0, the brief's remap RUSTFLAGS and maturin flags, a minimal pyo3 0.27.2 abi3 crate because no system cc exists here): built at <tc>/p1 and <tc>/pathtwo/x, the wheels differ (sha256 990f0117... 211156 bytes vs 999703a3... 211160 bytes); member-by-member, __init__.py, .abi3.so, METADATA and WHEEL are identical and only sboms/minirs.cyclonedx.json and RECORD differ; the SBOM contains exactly 3 lines with the absolute checkout path (bom-ref 'path+file:///<tc>/p1/minirs#0.1.0', bom-ref '... bin-target-0', and the dependencies 'ref'), no serialNumber, and a fixed timestamp, i.e. precisely the report's mechanism. Rebuilt at two different paths (<tc>/q1 and <tc>/qtwo/x) with only `[tool.maturin.sbom]\\nrust = false` appended to pyproject.toml: both wheels have sha256 20ae98a357d3bb011d40ec43934933a0b223af6ef0796337939d910c2a5c01ff, byte-identical, and contain no sboms/ entry.","severity":"medium","title":"'Next fix to try' leaves the SBOM switch hypothetical although maturin 1.16.0 documents it"},{"description":"The goal is to pin the lockfile so independent builds can be compared, and the brief says to generate one Cargo.lock and 'use that same file in every checkout'. The report gives only the lockfile's sha256 (b5efc7f1..., 75461 bytes) and then states, in the paragraph after 'What two or more machines DID produce identically': 'there is no shared Cargo.lock text, byte count, or build command to hand to a later builder as \"the\" reproducing recipe'. That contradicts its own table: five of six results (r1, r2, r3, r4, r6) produced a byte-identical Cargo.lock, and the report's own evidence (r5's different lockfile, which it attributes to crates.io index drift) shows `cargo generate-lockfile` cannot be relied on to regenerate it. Without the lockfile text, an independent builder following the 'Build command used by every result' cannot be sure to reproduce even the .so hashes 414ea6d2.../ff88b635... that the report presents as the reproducible part. The report also does not say which package(s) differ between the b5efc7f1 and a180854c lockfiles, so the requester cannot judge whether r5's divergence matters for this target.","line":null,"path":null,"reproduction":"Figures as stated: Cargo.lock sha256 column of the per-result table -> r1,r2,r3,r4,r6 = b5efc7f1aaf2c92fafa2015404ff74f760b80135a9e16bacded7f4ba0c81690b; r5 = a180854ccb8f32e0104bafea81d25b08a916116c80b9d44a2e3d17dfeed3cc65. Claim as written: 'there is no shared Cargo.lock text ... to hand to a later builder'. Expected: the deliverable includes (or links as an artifact) the 75461-byte Cargo.lock with sha256 b5efc7f1..., names it as the file to commit, and lists the diff against r5's lockfile. Actual: no lockfile content anywhere in the deliverable; the sentence quoted denies one exists; no diff is given.","severity":"medium","title":"The pinned Cargo.lock is not delivered, only its sha256, and the report wrongly concludes no shareable lockfile exists"},{"description":"Section 'Source-reliability caveats' attributes the V2.sol code to 'artifact 1f4f14f0...'s code field'. The identifier is truncated, so the requester cannot open the source. The other cited artifact resolves and already contains both items: https://api.imd.fun/artifacts/02c134d9ed51858f06d02b6dec25e6922016490f11e3a8174af512a6a77b6569 has source_files['scratch/instrumentation.patch'] with sha256 11f79c95f30eb7d829be6c34d57caf28f5b3de39dce8f81bb62a8029231e0e1e (matches the report) and a `code` field whose sha256 is 28417e116f57f1029fdd1803832e852574902c1ae7253c05657f317db76da4ab (matches the report's V2.sol hash), so the provenance itself checks out; only the citation is unusable.","line":null,"path":null,"reproduction":"Claim as written: 'artifact `1f4f14f0...`'s `code` field'. Try to fetch https://api.imd.fun/artifacts/1f4f14f0 -> no full id is given, so nothing to fetch. Expected: the full 64-hex artifact id. Verified alternative: sha256 of the `code` field of artifact 02c134d9ed51858f06d02b6dec25e6922016490f11e3a8174af512a6a77b6569 = 28417e116f57f1029fdd1803832e852574902c1ae7253c05657f317db76da4ab.","severity":"low","title":"V2.sol provenance cites an artifact by an 8-character prefix that cannot be resolved"},{"description":"Section 'What two or more machines DID produce identically', bullet 'The gate', reports the CH.sol mean 525.5258821780834 as 'matching the expected value in every result' without saying where the expected value comes from, and reports the V2.sol run as 'afterSwap calls 21580, ok 21577, oog 3, max_ok_gas 243554' without stating the seed range or run configuration. The one source the report cites for V2.sol (artifact 02c134d9...) ran V2 over seeds 10000..10128 and reports 4 OOG halts and 1,313,471 afterSwap calls, so the report's 3 OOG / 21580 calls is a different configuration that a reader cannot reconcile or re-run from the text.","line":null,"path":null,"reproduction":"Claim as written: 'V2.sol ... run twice with wheel B gives, in every result: afterSwap calls 21580, ok 21577, oog 3, max_ok_gas 243554'. Source the report cites for V2 (https://api.imd.fun/artifacts/02c134d9ed51858f06d02b6dec25e6922016490f11e3a8174af512a6a77b6569, fields gas and summary): oog 4, max_ok_afterSwap 243554, seeds 10000..10127, 1,313,471 afterSwap calls. Expected: the report names the seed range and harness invocation behind its own 21580/3 figures and the origin of the 525.5258821780834 expected mean. Actual: neither is stated.","severity":"low","title":"Gate figures are stated without the run parameters or the source of the 'expected value'"}],"hash":"f2470ea646caf8111ce60840a8dca3beeb47cd76c6d39f7434c9623fb7b6799f","nodeId":"4fc406c0-bdb7-4fc0-87b0-601aae2833d5","outcome":"completed","summary":"Review complete. The findings file holds four substantiated findings, no high or critical.\n\n**What holds up in the report**\n- Every internal figure recomputes from its table: 12 distinct wheel-A and 12 distinct wheel-B hashes, byte ranges 719297–719319 and 727735–727756, per-machine spreads, five of six identical lockfiles.\n- SOURCE_DATE_EPOCH 1770505944 equals the committer date of 6b6921f8 on GitHub and the zip timestamp 2026-02-07 23:12:24.\n- The cited artifact 02c134d9 does contain scratch/instrumentation.patch with sha256 11f79c95… and the V2.sol code with sha256 28417e11…, both as the report states.\n- The root cause is correct and I reproduced it. maturin 1.16.0 pins cargo-cyclonedx 0.5.9, whose bom-ref is the cargo package id. Building a minimal abi3 crate here with the brief's exact flags at two checkout paths gave wheels that differ only in the SBOM and RECORD, with exactly three absolute-path lines in the SBOM, no serial number, and a fixed timestamp.\n\n**Findings, ranked**\n- **Medium: the fix is left hypothetical.** The report says disabling the SBOM is possible only \"if maturin 1.16.0 exposes such a flag\". The maturin 1.16.0 guide documents `[tool.maturin.sbom] rust = false`. With that key appended to pyproject.toml, my two-path build produced byte-identical wheels with no sboms entry.\n- **Medium: the pinned Cargo.lock is not delivered.** Only its sha256 is given, and the report then states no shared lockfile text exists to hand to a later builder, contradicting its own table where five results agree. It also never says which package differs in r5's lockfile.\n- **Low: unresolvable citation.** V2.sol provenance points at artifact \"1f4f14f0…\", an 8-character prefix that cannot be fetched.\n- **Low: gate figures without parameters.** The CH mean's \"expected value\" has no stated source, and the V2 run gives no seed range, while the cited artifact's own V2 run used seeds 10000..10128 and reports 4 OOG, so the numbers cannot be reconciled from the text.\n\nNo repository files were changed. The throwaway toolchain and test builds live under the sandbox temp directory only.","treeHash":null,"usage":{"cachedInputTokens":1206475,"cost":{"source":"runtime","usdMicros":3160912},"inputTokens":770,"model":"claude-fable-5-1","outputTokens":31804,"runtime":"claude","turns":25,"wallClockMs":515715}}],"verification":[{"checks":[],"detail":"paths and tree verified; no suite was run for this kind of work","evaluation":"structural","profile":"none","status":"accepted","submissionHash":"05fd68abc139318814f75da53a95ae53170cd69b9a80181be43830a0c922ba8f","verifiedTreeHash":"4b825dc642cb6eb9a060e54bf8d69288fbee4904","verifierVersion":"0.1.0+89159ae2"},{"checks":[],"detail":"paths and tree verified; no suite was run for this kind of work","evaluation":"structural","profile":"none","status":"accepted","submissionHash":"1aeed44ed48ed2c55f796633f2320eabcf6261935447803cdad7c585c2777228","verifiedTreeHash":"4b825dc642cb6eb9a060e54bf8d69288fbee4904","verifierVersion":"0.1.0+89159ae2"},{"checks":[],"detail":"paths and tree verified; no suite was run for this kind of work","evaluation":"structural","profile":"none","status":"accepted","submissionHash":"1f02bfd22610d26a08ed9b29d1d030a9ad1a2306340dde39c51226cf4fe79563","verifiedTreeHash":"4b825dc642cb6eb9a060e54bf8d69288fbee4904","verifierVersion":"0.1.0+89159ae2"},{"checks":[],"detail":"paths and tree verified; no suite was run for this kind of work","evaluation":"structural","profile":"none","status":"accepted","submissionHash":"3bfebe0320fee4cbb456592e9145dcaf6ac1c39b3ad2368bdb1ea35eee1da942","verifiedTreeHash":"4b825dc642cb6eb9a060e54bf8d69288fbee4904","verifierVersion":"0.1.0+89159ae2"},{"checks":[],"detail":"paths and tree verified; no suite was run for this kind of work","evaluation":"structural","profile":"none","status":"accepted","submissionHash":"695652001dc018605dd7c58c422e038c12ebe774da474e7dc71a826072183f33","verifiedTreeHash":"4b825dc642cb6eb9a060e54bf8d69288fbee4904","verifierVersion":"0.1.0+89159ae2"},{"checks":[],"detail":"paths and tree verified; no suite was run for this kind of work","evaluation":"structural","profile":"none","status":"accepted","submissionHash":"c509c1925d9ef9727ec1b795ff87cf12701d89f8b346cd622d8565c7330c91c4","verifiedTreeHash":"4b825dc642cb6eb9a060e54bf8d69288fbee4904","verifierVersion":"0.1.0+89159ae2"},{"checks":[],"detail":"paths and tree verified; no suite was run for this kind of work","evaluation":"structural","profile":"none","status":"accepted","submissionHash":"c797f9ad038eb7cb08829a5f88fdbd8d0405ddd5cde1b51b94e1d74c1424ad10","verifiedTreeHash":"4b825dc642cb6eb9a060e54bf8d69288fbee4904","verifierVersion":"0.1.0+89159ae2"}]}