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.
asmgate_test.ww absorbs 530_w6a_parsenum and 989_datargate_run: the
strtoll-semantics identity rows plus the bare-minus reject against
both assemblers with cross-stage .o byte-identity, and the undefined
DATAR-slot loud reject (no .o written) with the defined-slot
byte-identical ok path. The w6a_ww skip gates drop: the Make target
declares both assemblers.
