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BFM-decomp/docs
Drew T 52e6522f1b feat(phase-29): T0.5 — FREE-subset sweep, 3 families fully banked (389 members, +37,713 ins)
Re-derived the T0.1 decomposition post-harvest (it was stale by 395 banked members):
  zero-crack pool 76 fams / 347,892 ins  ->  73 fams / 290,850 ins   (the harvest came out of it)
  FREE (sweepable, non-jr, non-O0)       ->  58 fams / 167,368 ins

Swept the top FREE families through the gate_stage ladder (sample 8/8 first, then the rest):
389 banked; func_801463A0 / func_8017B490 / func_80156670 now stubbed in ZERO overlays.
R22 clean-fleet 140/140 BYTE-IDENTICAL; tools-health OK; dedup 1886/0; 0 NON_MATCHING (G4).
Fleet: instr 81.0 -> 81.3% (10,645,711 -> 10,683,424) · distinct-code 68.8 -> 69.0% ·
fn-count 89.30 -> 89.41%.

THE BLOCKER HAS MOVED — it is now OUR OWN PIN GUARD, not gcc and not declarations. Of the 1,083
candidate members in the top 8 FREE families, 680 (63%) were refused by the §42e pinned-exemplar
guard BEFORE any gate ran; only 403 reached staging. Two pieces of evidence say the guard may now be
over-conservative: SESSION-19 banked func_8017A4AC x134 WITH pins once the byte-gate arbitrated, and
Phase 27 dissolved the cc1 SIGABRT that motivated it (it was the extract_unit macro-drop, not a
compiler limit). Next probe: --allow-pins on a sample of 8, byte-gated.

MY OWN SCRIPT BUG, fixed + negative-controlled: the sweep loop globbed `.run/sweep/*/`, which also
matches gate_stage's INTERMEDIATE ladder dirs (-cn, -cn-cast, -cn-cast-rc, -s2in, -s2in-uni). Those
were called as if they were binaries -> 24 phantom "PARTIAL 0/1" lines inflating notbanked to 56 when
the true failure count was ZERO (stub counts 0/0/0 are the ground truth). Fixed by requiring
config/splat.<ov>.yaml to exist; negative control confirms phantoms are skipped and real binaries kept.
2026-07-26 18:32:09 -06:00
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