PDFToMD/phases/4-semantic-enrichment/step3.md

Step 3: reference-indexing

Read First

• /AGENTS.md
• /PLAN.md
• /PROGRESS.md
• /docs/HARNESS.md
• /docs/IMPLEMENTATION_PLAN.md
• /docs/CONVERSION_POLICY.md
• /phases/3-formula-pipeline/step3.md
• /phases/4-semantic-enrichment/step2.md

Task

Build a reference index for figures, tables, formulas, captions, and body references.

The index should support later Markdown rendering by providing stable anchors and high-confidence link targets.

Sprint Contract

• Done means: table, figure, and formula references can be resolved or left plain with reasons.
• Hard thresholds: anchors are deterministic; duplicate labels are handled; missing targets do not produce broken links.
• Files owned: src/pdftomd/enrichment.py, reference models/tests, PROGRESS.md, phase index.
• Dependencies: Formula links and semantic block enrichment.

Acceptance Criteria

python scripts\validate_workspace.py
.\venv\python.exe -m pytest tests

Verification

1. Run the acceptance commands.
2. Confirm figure/table/formula reference fixtures are covered.
3. Update PROGRESS.md and this phase index.

Do Not

• Do not rewrite ambiguous references.
• Do not make anchors depend on nondeterministic ordering.
• Do not render final Markdown here.