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.
seplink_test.ww carries the .a substrate legs (root-as-.o layout, .a
byte-id + 3x determinism, the #31 masked-dup PASS-3 reject with its
non-vacuity flip), the loud dependency-cycle reject with byte-equal
cs/ww stderr, and the w6l/w6l_ww bare-main duplicate-symbol reject
(achievable substring parity per the filed message divergence).
