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Architect clean (Invariant 1 holds semantically; DESIGN.md honesty satisfied; lockstep intact; Design-decision 6 module==stem confirmed correct, not drift). Sole [low] (rustfmt-divergent export: None, indentation) orchestrator-adjudicated carry-on on evidence: cargo fmt --all --check shows 1137 fmt-divergent locations tree-wide predating M1 — rustfmt is not a project convention, the churn premise is moot. Bench: compile_check 0/24 + cross_lang 0/25 exit 0; check.py exit 1 (7 firings: *.bump_s trio + explicit/implicit_at_rc p99_9/max_us). Bencher causal exoneration decisive: 21/21 bench binaries cmp-byte- identical 064599e..e406d07 (Target::Executable default = zero emitted- code change for the bench corpus); latency tails reproduce on the byte-identical oracle itself (-n 5 single-sample jitter); fresh re-run collapsed 6/7 to ok. Both families map to the two pre-existing roadmap-P2 tracked noise items. NO baseline ratify (Iron Law forbids ratifying noise against a zero-default-path-byte iter). M1 audit CLEAN. fieldtest (surface-touching) is the next pipeline step before milestone close.