Independent source review

Reviewer: parent agent /root, 2026-10-17, before final freeze. Owning HEAD: 4a3079cc49ea086121324af826091c559e5d8120 (plan only). Reviewed local input inventory: e37fe7a30ff0dac0bf740833ea94de21e503e703b73a275111e4f2f1ac3ff260.

Root inspected image plan/native/validation modules, Block/creation/FFI changes, full image tests/support and additive specs. Root found no blocker and checked complete row extents, odd chroma, retained import/lock cleanup, exact plan/native matching, immutable numeric authority and the absence of readiness claims. SDK documentation independently confirmed that out-of-range plane queries return zero, so querying indices zero/one before count validation is safe.

Root authorized the final freeze/gates and implementation commit once owning gates pass. Preexisting workspace failures must remain visible without widening the source scope. This review establishes no PA, device-completion, non-Apple delivery or release verdict.