- Revert .h -> extract_c (C++ grammar rejects C++ keywords used as identifiers
in Linux-kernel-style headers; .hpp/.hxx/.hh already route to extract_cpp)
- Fix field_declaration block: use children_by_field_name("declarator") instead
of iterating all children with wrong type guard; replace ensure_node (undefined)
with add_node
- Fix _import_c include resolution: use _make_id(str(resolved)) to match the
file_nid scheme _extract_generic uses, not _make_id(_file_stem(resolved))
- Fix exact_merges counter in dedup Pass 1 to count only within-file merges
actually performed, not the raw unpartitioned group sizes
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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