Architect: revert byte-pristine vs 1ff7e81 (18 src + 5 test files
byte-identical; zero residual it.1/it.2 production surface; DESIGN.md
+ roadmap + spec hygiene correct). One [medium] drift — a dangling
loop/recur cross-reference into the reverted milestone inside the
LIVE Stateful-islands roadmap scope bullet — fixed inline: reworded
to keep the real, still-true scope guard (no while/for; this
milestone introduces none; repetition stays recursion as the
language has it; a mut block is a sealed expression, never a loop)
and drop the reverted-milestone reference.
Bench: compile_check.py / cross_lang.py exit 0; check.py exit 1 on a
single metric (bench_list_sum.bump_s +12.71%). Bencher localisation:
the HEAD and 1ff7e81 bump binaries are cmp-identical, an interleaved
3x60-run measurement shows head-oracle delta ~0 (±1.5% stdev) with
both ~+11% over the 2026-05-09 baseline — environmental/hardware
drift, NOT a revert regression (third independent proof codegen ==
1ff7e81, alongside the architect byte-diff and the Task-11
behavioural-equivalence sweep). Resolution: carry-on; baseline NOT
ratified (Iron Law — nothing intentionally moved the metric;
byte-identical codegen must not move the baseline; the spec's
PRISTINE mandate is satisfied: pristine = no regression introduced,
proven). The pre-existing *.bump_s baseline-vs-hardware staleness is
filed forward as a separate P2 [todo] (bench-harness recalibration,
no language change), not mis-attributed to the revert.
Fieldtest skipped (Boss judgement; non-mandatory): a revert restores
the already-field-tested pre-9973546 surface; the Task-11
164-fixture byte-equivalence is the stronger correctness proof.
Milestone iteration-discipline-revert closed clean.
Brummel
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