- ROOT CAUSE: the jtbl carve's s8b carried-decl layer conflicts with each draft's
externs; the reconcile chain (cast_call_sites+reconcile_tu, --src-file-aware) exists
but gate_stage runs it PRE-carve against the wrong TU (a jtbl fn's real TU is the
split file, which doesn't exist until harvest_verify carves).
- FIX (cookbook s62): harvest_verify._jtbl_reconcile runs the chain POST-carve against
the CARVED TU, draft-only rewrite, guarded by _jsnap is not None. Validated:
func_80135260 (callee) + func_80191C50 (data) both conflicting-types -> genuine DIFF.
- FINDING (R14/R31 -> decision-log): dissolving the plumbing REVEALED all 4 jtbl drafts
have a deeper issue -- func_80135260/80191C50 real %hi-share regalloc residual (agents'
reloc-masked match_one MATCH over-claimed it); func_8012AAAC def-side-arity + FLEET-
SHARED + still DIFFs after arity fix (def-side wall); func_80135EB0 isolate FAILED.
The '+0.58pp from 3 reach-138 jtbl families' is REFUTED -- near-misses/walls, not
plumbing. The fix banks any plumbing-ONLY jtbl fn + makes the jtbl gate honest.
- s61 traps re-confirmed (s62): gate jtbl ONE-AT-A-TIME (mid-batch isolate-FAIL corrupts
the batch); fix_arity on an engine_core.h fn leaks fleet-wide (restore src/shared/ too).
- R22 clean-fleet 140/140; tool change only (no committed-byte change).
Drew T
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