Session: add-pdf-invoice-export — 2026-11-03

Project: ledger-api · Branch: feat/pdf-export · Mode: default · Model: glm-4.6

Summary

Added PDF export for invoices with WeasyPrint and a Jinja2 template; PDFs are rendered in a background task and cached by invoice revision, so re-downloads are instant.

Conversation

Turn 1 — User

Export invoices as PDF. It should look like the HTML preview.

Turn 1 — Assistant

Reuse the HTML preview template, render with WeasyPrint in a background task, store under invoices/<id>/<revision>.pdf. The download endpoint streams the cached file.

Tools used in this turn:

• Write: ledger/pdf.py
• Write: templates/invoice.html
• Edit: ledger/routes/invoices.py
• Bash: pytest tests/test_pdf.py -q — 4 passed

Connections

• [[ledger-api]]
• [[WeasyPrint]]
• [[Jinja2]]
• [[BackgroundTasks]]