Every section banner dies (103 -> 0) across test/lang, the observer
suites, the C carriers, and the five comment-heavy corpus fixtures;
banner provenance (#N cites, carrier numbers, repair-cluster labels)
folded into headers or adjacent WHY comments. Narration deleted; row
provenance, ref cites, divergence pins, and layout contracts kept
(fwd-ref decl-order guards and bootstrap-gate corpus rationale
restored where the sweep over-cut). Comment-only proven: all 3742
wwbuild workdir .s byte-identical before/after; test-commit and
test-byteid (161 lang + 1399 data, 0 pinned-divergent) green.
A struct/array success variant in an (S|e)! / r? unwrap dropped eightbytes on BOTH stages (byte-id blind). Two layers: (L1) the unwrap success shuffle (cgtrytaggedshift) matched no arm for a struct/array success and fell to a bare MOVQ DX,AX, materializing only w0 — widen the existing nested-TAGGED shift's gate to admit TY_STRUCT/TY_ARRAY (the in-cap union packs the payload as raw GP words past the tag, so that shift is exact); (L2) the aggregate store arms gated on rhs.kind==N_CALL and stored one word for an unwrap rhs — relax to also admit N_TRYUNW/N_TRYPROP at the three silent store shapes (arr[i]=, single-dot field, indexed-field), reusing the materialise scratch path (now #10-correct). Rule-7 LOUD-STOP for a float-bearing success variant (an SSE eightbyte cannot ride the GP {AX,DX,CX} shift, #165). The four already-loud unwrap consumers (let-receive #7, call-arg #271, assign-existing #49, resolver-field #24) stay loud; global/chained single-dot field (#16) and the sub-8-tail-through-unwrap union-maker frame clobber (#15) are separate follow-ups. Value-asserting pin, reddens under each stage's independent revert.
