Implement per-word validation filter for assisted-OCR BrokenVector path.
Changes:
- Add SpanSource::OcrAssisted variant to hybrid.rs
- Add Span::ocr_assisted() helper method
- Implement validate_ocr_with_position_hints() in ocr.rs
- 5pt distance threshold for position validation
- 0.4 confidence cap for rejected words
- Linear scan for nearest-neighbor lookup
- Add unit tests for validation filter
Closes: pdftract-3s2i
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Make diagnostics module visible to fingerprint module and fix
hash_page_geometry signature to match usage.
Changes:
- Add `pub mod diagnostics;` to lib.rs for module visibility
- Modify hash_page_geometry to create diagnostics internally
The canonicalize module already has complete implementation:
- canonicalize_f64: banker's rounding to 4dp for geometry
- normalize_content_stream: whitespace normalization via lexer
- serialize_dict_canonical: sorted-key dict serialization
- hash_resource_dict_canonical: order-independent resource hashing
Verification: notes/pdftract-154mz.md
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
The apostrophe in 'banker's_rounding' is invalid Rust 2021 syntax.
Changed to 'bankers_rounding' to fix compilation.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit implements the Cargo.lock policy for reproducible builds
across all workspace members (pdftract-core, pdftract-cli, pdftract-py).
Changes:
- Add CONTRIBUTING.md with lockfile-update workflow documentation
- Add .renovaterc.json for weekly lockfile-only PRs (human-gated)
- Add crates/pdftract-core/README.md with rationale for checked-in lockfiles
- Add notes/pdftract-49f8.md with verification note
The Argo workflow updates (pdftract-ci.yaml) are committed separately
in the declarative-config repo.
Acceptance criteria:
- PASS: Cargo.lock tracked by git, not in .gitignore
- PASS: Argo workflow templates document --locked/--frozen requirements
- WARN: Enforcement to be completed when placeholder templates are implemented
- WARN: Binary reproducibility verification deferred to pdftract-build-binaries implementation
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Implement Merkle SHA-256 fingerprint algorithm for PDF structural
fingerprinting as specified in Phase 1.7 of the plan.
Components:
- FingerprintInput struct with page data and catalog flags
- Per-page hashing: content streams (normalized), resources (sorted),
geometry (4dp banker's rounding)
- Structure tree hash for tagged PDFs
- Catalog feature flag byte (encryption, JS, XFA, OCG)
Acceptance criteria:
- INV-3: 100% reproducible fingerprints (test passes)
- INV-13: Output format ^pdftract-v1:[0-9a-f]{64}$ (test passes)
- Performance: 100-page PDF in < 1ms (test passes)
- KU-7: WARN - no linearized fixtures available
Closes pdftract-q15sh
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
