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phases/5-markdown-rendering-assets/step1.md

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+# Step 1: table-renderer-fallbacks
+
+## Read First
+- /AGENTS.md
+- /PLAN.md
+- /PROGRESS.md
+- /docs/HARNESS.md
+- /docs/IMPLEMENTATION_PLAN.md
+- /docs/CONVERSION_POLICY.md
+- /phases/5-markdown-rendering-assets/step0.md
+
+## Task
+Implement table rendering policy for Markdown tables, limited HTML tables, and image fallback links.
+
+Use structured table objects and avoid ad hoc string parsing for complex cases where possible.
+
+## Sprint Contract
+- Done means: simple tables render as Markdown, complex tables can render as limited HTML or fallback references, and table captions/footnotes are preserved.
+- Hard thresholds: tests cover merged-cell-like structures, footnotes, captions, and table fallback decisions; invalid table output is detected by quality gates.
+- Files owned: `src/pdftomd/renderer.py`, table models/tests, `PROGRESS.md`, phase index.
+- Dependencies: Step 0 renderer and Phase 0 quality gates.
+
+## Acceptance Criteria
+```powershell
+python scripts\validate_workspace.py
+.\venv\python.exe -m pytest tests
+```
+
+## Verification
+1. Run the acceptance commands.
+2. Confirm fallback images are linked but not generated unless a table asset exists.
+3. Update `PROGRESS.md` and this phase index.
+
+## Do Not
+- Do not fake table content that was not extracted.
+- Do not discard captions or footnotes.
+- Do not implement full HTML sanitizer scope beyond limited table output.