markdown ingest arm 이 그동안 유일하게 `App::extract_for` extractor
registry 를 우회하고 `kebab_parse_md::{parse_frontmatter, parse_blocks,
build_canonical_document}` free function 을 직접 호출했다 ("the single
biggest asymmetry"). 이를 image/pdf/code 와 동일하게 registry 경유로
통일.
- `kebab-parse-md` 에 `MarkdownExtractor` 신설 — 기존 free function 3종을
동일 순서·동일 인자로 감싸 `bytes → CanonicalDocument` 생산만 담당.
fm_span_end / count_lines_in / build_body_hints 헬퍼도 함께 이식.
- `App.extractors` registry 에 등록 (11 → 12 entry), markdown 이 `supports`
로 발견되도록 첫 entry 로 배치.
- `ExtractContext` 에 `source_id` / `source_trust` 필드 추가 — markdown
frontmatter 가 per-source trust 기본값을 override 하고 그 precedence 가
`parse_frontmatter` *내부*에서 결정되므로 ctx 가 carry 해야 함. 다른
extractor 는 None (post-extract 에서 source_id stamp 유지).
- 핸들러는 추출 stage 만 registry 로 이전 — version stamping / chunking /
embedding / store 는 그대로. IngestItem.warnings 는 pdf/code 처럼
`canonical.provenance` 의 Warning 이벤트에서 도출.
byte-identical 검증: parity gate-ingest (all-markdown 183 doc / 7676 chunk)
CHUNKS / SEARCH / ASK 모두 IDENTICAL. clippy 0, kebab-app + kebab-parse-md
test 전체 green.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012Mc6W1fgsrbFKTsqA6P8La
Reviewer nit #3: the hand-built fixed_doc() only verified chunker 1:1
mapping. New tests invoke CppAstExtractor against tests/fixtures/sample.cpp
and snapshot the real extractor → chunker pipeline (14 blocks emitted
covering namespace::chunk::Class, ctor/dtor/operator/template/free-fn
convention, glue <top-level> blocks between units).
Adds kebab-parse-code as a dev-dep of kebab-chunk (same precedent as
kebab-parse-md). Both the existing hand-built test AND the new
extractor-driven tests are kept — the former for fast chunker-only
validation, the latter for end-to-end regression detection.
Added tests:
- code_cpp_ast_extractor_snapshot: asserts all 8 named symbol units are present
- code_cpp_ast_extractor_chunks_deterministic: chunker output is stable
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
