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.
Migrate the slice/str-header core of drew's Family 1 from bespoke
build+run C twins to test/lang @test, retiring each now-redundant twin in
the same commit. Runtime coverage MOVES from $(TESTS) to test-lang (T1
runs+asserts via `ww test`) + test-lang-byteid (T2 keeps cs==ww .s
byte-id); coverage is preserved, the $(TESTS) headline drops 6 (440->434).
All asserts are primitive int/u8/bool comparisons (no fmt/strconv in the
assert path); the slice-store families poison the slot (cap!=len) and read
it back so a dropped data word FAILS.
928_str_abi_run.c -> str_abi_test.ww (str 24B ABI: .len/.cap across literal/arg/return/field/tuple/deref/index/tagged)
941_slice_store_cap_run.c -> slice_store_cap_test.ww (slice value store through indexed/field/chained lhs writes full 24B header; cap==8)
942_subslice_cap_run.c -> subslice_cap_test.ww (sub-slice cap = base_cap-lo; array/slice/str/append-no-realloc/hi-default)
943_subslice_ptresz_run.c -> subslice_ptresz_test.ww (sub-slice ptr advances lo*esz bytes; esz 2/4/8, let + call-arg)
944_deref_slice_store_run.c-> deref_slice_store_test.ww(*p=sliceval whole-deref store writes 24B header; cap==8)
949_f6_header_run.c -> f6_header_test.ww (str/slice header partial load/store; .cap/.len after clobber)
Bump LANGBYTEID_EXPECTED_MIN 16->22 to ratchet the new corpus floor.
