PR #155 (p10-3) merged WITHOUT the reviewer's required Option B1 fix —
the implementer reported a commit SHA (2a39513) that never made it to main.
Result: every reingest of a Tier 3-fallback file (non-k8s YAML, invalid
YAML, AST extractor failure) re-runs full extract + chunk + embed because
the parser/chunker version comparison can never match (stored is
code-text-paragraph-v1 / none-v1, but caller uses Tier 1/2 dispatch
values).
This commit:
1. Adds the 7th param `fallback_chunker_version: Option<&ChunkerVersion>`
to try_skip_unchanged + the stored_is_tier3_fallback detection branch
(skip parser/chunker equality, keep embedder check).
2. Threads `None` through non-code call sites (md / image / pdf).
3. Code call site computes tier3_fallback_cv covering all Tier 1/2 langs
that can fall back: rust / python / ts / js / go / java / kotlin /
yaml / dockerfile / toml / json / xml / groovy / go-mod / c / cpp
(p10-1D additions).
4. Adds tier3_yaml_fallback_reingest_is_unchanged + tier3_shell_reingest_is_unchanged
regression tests (the originally-promised PR #155 regression coverage
that also never made it to main).
Smoke tests: 14 + 2 = 16 PASS.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>