BFM-decomp/phase-ends/current/logs/T4.md

T4 log — rung S sweep, md_*, main, shared (Phase 3.39)

Attempts

• a1: read plan/summaries; brief T4.c1 (--only main selector, md/main/shared sweep). c1 committed 95612c3097 (selector, selftest 97/97), launched md cycle (pid 1360696). Forced hand-back → logs/T4.progress1.md (9b4ee67726).
• a2: archived progress1 (fd8c632c9b); briefed T4.c2 with remaining steps (main cycle, shared, residue, census, R22). Forced hand-back → logs/T4.progress2.md (e603d617c6). c1 and c2 were both still alive.
• a3 (this): archived progress2 (ddb65fc672). Waited idle (tail --pid) on md cycle 1360696, then main cycle 1638948, then c2 census/check-casts. Launched no coder: c1 and c2 finished every step.

Coder results (from their logs, checked against git log and re-run gates)

• c1 log logs/T4.c1.md, commits 95612c3097, 90257a55eb (docs/ops/p39-t4-2026-10-02-restruct-only-main.md).
• c2 log logs/T4.c2.md, commits c2ea6e5428 (residue rows), 8315a95bc6 (log).
• Cycle commits: md 3a259e0198 ef3cab3047 52b50095e5 93260530b5 773878d86a (S6 nothing drawable); main f6f4ae75d0 (S2 nothing drawable). Each final N/N identical, R22 218/218.
• shared: --plan --rung S --headers --only "src/shared/*" → 0 drawable (type-not-canonical 3054, type-not-visible 1); no cycle.
• Both coders started a main cycle; restruct apply.lock refused the second, no tree change.

Commands run (a3)

• type_census.py --check-casts --quiet → rc 1, raw P=257464 I=51505 X=13790 M=15130; macros CAST_ALIAS=1173 CAST_SIGN=8429 CAST_WIDTH=10410 CAST_MISALIGNED=624 CAST_NONSTRUCT=327 (unbacked 0); lying=229.
• restruct.py --rung S --check-residue --only md_* / main / src/shared/* / ov_* → uncovered 0 sites / 0 bodies, rc 0 each.
• type_census.py --check-structs --quiet → rc 0.
• .run/logs/t4_verify.log: make clean && extract-all (217 + main) && check-all → 218 passed, 0 failed.

Done-when assessment

• "as T3 for md_*, main, shared": met (every P/X body ledgered; kept casts backed; R22 green).
• "main gated only by gate_main.py": gate_main gates draft slates only (c2, retriever-code read gate_main.py:32-33,243-249); main gated by per-object oracle + cycle clean R22 (check.main.sha in the 218).
• "P and X raw = 0 fleet-wide except T5-owned (non-struct base)": NOT met. Residue P 257,464 / X 13,790, ledgered overwhelmingly TYPE-NOT-CANONICAL (T3 binding), not NON-STRUCT. Needs a plan ruling.

Retrievers

• none in a3 (c2 used one retriever-code on gate_main; no report adopted).