Heavy File Ingestion Codex

uv run \
  --with pdfplumber \
  --with python-docx \
  --with python-pptx \
  --with openpyxl \
  python scripts/convert_heavy_file.py /absolute/path/to/file.ext

1. Read index.md first, not the original file.
2. Follow the index recommendation:
   • read_extracted_artifact: inspect the generated markdown or CSV
   • cheap_model_or_stronger_converter: retry with a better deterministic tool or use a cheaper model on the extracted artifact only
   • manual_review: tell the user the deterministic route failed and propose the next cheapest fallback
3. Use expensive model context only after the file has already been compressed into a smaller artifact.

Client Rules

• Keep the main model out of raw PDFs, decks, and spreadsheets whenever possible.
• Use the generated .ob1/ folder as the working directory for follow-up analysis.
• For spreadsheets, reason from the CSV per sheet plus the workbook manifest.
• For presentations, reason from the slide outline before asking for a deeper pass.

Bundled References

• references/open-source-stack.md explains the tool choices and fallback tiers.