After the chunks match resolves, an Ok(empty) result (Tier 2 invalid YAML
/ non-k8s YAML / similar) or Err (Tier 1 extractor / chunker failure) is
retried against CodeTextParagraphV1Chunker. On retry, chunker_version is
swapped to "code-text-paragraph-v1" and canonical.parser_version to
"none-v1" so downstream stamping + try_skip_unchanged remain consistent.
Extract failure is handled similarly — when a Tier 1 extractor errors
(e.g. tree-sitter parse failure), a synthesize_tier2_document-shaped
fallback doc is built from raw bytes and routed through Tier 3 chunker
directly (extract_fell_back guard).
shell direct path + Tier 2 extract synthesize_tier2_document failures
are exempted from the fallback chain (they ARE Tier 3 already, or the
error is real).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
altair823
5051ea7534