87 lines
3.4 KiB
Markdown
87 lines
3.4 KiB
Markdown
# Phase 1 Coordinator Close Verification
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**Bead:** pdftract-c4gmq - Phase 1: Core PDF Parser (Foundation)
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**Date:** 2026-06-03
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**Status:** CLOSED
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## Overview
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Phase 1 delivers the `pdftract-core::parser` module — a complete PDF parsing infrastructure capable of parsing any PDF object, resolving xref tables, decoding streams, and handling remote sources. This foundation enables all higher-level features (text extraction, schema export, SDK generation).
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## Sub-phase Coordinators (All Closed ✓)
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| ID | Sub-phase | Status | Description |
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|----|-----------|--------|-------------|
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| pdftract-3csx | 1.1 Lexer | CLOSED | Tokenize raw byte slice into PDF tokens |
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| pdftract-54pt | 1.2 Object Parser | CLOSED | Parse token stream into PDF object model |
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| pdftract-4m8u | 1.3 Cross-Reference Resolution | CLOSED | 4 strategies + incremental updates + linearization |
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| pdftract-4mdfv | 1.4 Document Model | CLOSED | Catalog, page tree, encryption, OCG, JS, conformance |
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| pdftract-4fsnb | 1.5 Stream Decoder | CLOSED | 9 filters + filter pipeline + 2 GB bomb limit |
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| pdftract-5n2lu | 1.6 Error Recovery | CLOSED | Cross-cutting strategies for malformed files |
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| pdftract-22vzm | 1.7 PDF Structural Fingerprint | CLOSED | Reproducible 256-bit content hash |
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| pdftract-6096u | 1.8 Remote Source Adapter | CLOSED | HTTP Range reads + PdfSource trait |
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## Acceptance Criteria Status
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### PASS ✓
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- All 8 sub-phase coordinators closed
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- `pdftract-core::parser` module compiles standalone
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- All Phase 1 critical tests pass (per sub-phase verification notes):
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- Lexer escapes (EC-01, EC-02)
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- Hex strings odd-length handling
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- Object streams
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- Circular ref detection
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- Xref recovery strategies
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- FlateDecode predictors
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- Stream decompression bomb limit
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- Fingerprint reproducibility
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- Remote Range fetch
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## Key Deliverables
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1. **Core parsing infrastructure** — `crates/pdftract-core/src/parser/`
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- Lexer: `lexer.rs`, `token.rs`
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- Object parser: `object.rs`, `indirect_object.rs`
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- Xref resolution: `xref.rs`, `hint_stream.rs`
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- Stream decoder: `stream.rs` with all 9 filters
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2. **Document model** — `crates/pdftract-core/src/document.rs`
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- Catalog traversal
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- Page tree with inheritance
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- Encryption support (RC4, AES-128, AES-256)
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- OCG configuration
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- JavaScript detection
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- PDF conformance detection
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- Outline extraction
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3. **Fingerprinting** — `crates/pdftract-core/src/fingerprint/`
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- Reproducible 256-bit content hash
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- ADR-008 exclusion rules applied
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- `pdftract hash` subcommand in CLI
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4. **Remote sources** — `crates/pdftract-core/src/source/`
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- `PdfSource` trait abstraction
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- HTTP Range request support
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- LRU cache for remote fetches
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5. **Error recovery** — cross-cutting INV-3 and INV-8 invariants
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- No panics in library code
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- Graceful degradation for malformed PDFs
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## Integration Points
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- **Phase 2 (Font Pipeline):** Unblocked — text extraction can now build on parsed document structure
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- **Phase 3 (Schema Export):** Unblocked — schema gen has complete document model to serialize
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- **Phase 7 (Structure extraction):** Unblocked — StructTree parser has doc model to traverse
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## References
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- Plan: `/home/coding/pdftract/docs/plan/plan.md` Phase 1 (lines covering all 1.1-1.8)
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- ADR-008: Fingerprint exclusions
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- INV-3: No panics in library code
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- INV-8: Graceful degradation
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## Conclusion
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Phase 1 is complete. The core PDF parser is production-ready and all acceptance criteria pass.
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