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BFM-decomp/docs
Drew T ceae8bb4cd feat(phase-29): T97 — func_80151944 138/138; the "three-edit job" was ONE edit
- The last big NAMED blocker, costed across four checkpoints as §112 header + §20 call-site cast +
  a scripted §99 pass over 2,022 overlay-local decls. Probing first showed two of the three were
  unnecessary: the conflict is entirely between DEFINE_func_80151924()'s own forward-decl
  (extern s32 func_80151944(void)) and the byte-true definition (void f(void *a0)), four lines
  apart in the assembled TU. The 2,022 decls live in OTHER TUs and never entered it.
- ONE 4-line edit in engine_core.h: decl -> byte-true, call site -> ((s32 (*)(void))f)() so the
  caller's codegen is unchanged. rtu_match: conflicting types -> MATCH (15 ins). Sweep 138/138.
- Family 0x80131eec fully closed: 149 (T87) + 138 (T97) + 1 immediate-refusal = all 288 members.
- SHARED-HEADER RISK VERIFIED, NOT ARGUED: engine_core.h is included by all 138 overlays, so §20
  cast-folding is a hypothesis. Per-binary gates 138/138 are necessary but not sufficient; the
  fleet check is the one that counts. R22 clean-fleet 140/140 + tools-health RC=0 (corpus 0
  PHANTOM/0 TRUNCATED, cdecl, audit-binaries, dedup 1886/0, C1 239604/239604).
- METRICS: fn-count 91.96 -> 92.00% (+138, exact) · instr 87.4 -> 87.5% (+2,070) · distinct +72.
- COSTING LESSON: the estimate came from reading the symptom (2,022 decls of this name exist)
  instead of probing the failure (which decl actually conflicts). Probe before COSTING, not just
  before scaling.
2026-07-30 13:44:22 -06:00
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