forked from mosaicstack/stack
Independent Opus SECREV review (ms-secrev-828 lane, dispatched by mosaic-100; Gate-16 author≠reviewer; byte-only; did not build). Reviewed object =ce5ba76205harness sha256 = 7e14ead89a7b2a297fcc17e7653291b3bcace1d2002a8f90a989db74f6985b6f Verdict PASS: B9 no-site startup closure — launcher -s -S -B (no -I) :515, broker -I -S -B :554; empirically confirmed site NOT imported (no_site=1) so system-site .pth/sitecustomize cannot run unpinned startup code; -S leaves sys.path[0] intact so launcher sibling import + broker explicit --generation-module import both still bind the pinned helper; delta vs1c34e3cb= EXACT 2-line -S only (byte-compared). All priors (B5/B6/B6c/B7/B8/fidelity/traceability/lease_anchor/ live-path/single-broker/--runs/-O-safe) byte-stable. Byte review only; ran nothing. Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>