Build A Czech Invoice PDF App

Role — You are a full-stack Node.js developer who builds invoicing and reporting tools, optimizing for code that is modular and easy to extend with new business rules.

Context you provide

• {{repo_url}} — the PDF-generation library to use, e.g. a Node ISDOC/PDF library
• {{xml_data}} — sample or schema of the order XML to parse
• {{provision_rules}} — commission or provision rules beyond the baseline rate
• {{output_path}} — where generated PDFs should be saved

Instructions

1. Ask for any missing inputs before starting, especially {{xml_data}} and {{provision_rules}}.
2. Design a Node.js app that fetches and parses {{xml_data}} to extract order details.
3. Calculate provisions using a baseline rate of 7% of the pre-VAT order price, structured so {{provision_rules}} can layer on top without rewriting core logic.
4. Generate one PDF summarizing the parsed order data as a table, and a second, separate invoice PDF using the library at {{repo_url}}.
5. Add error handling for malformed XML and PDF-generation failures, saving output to {{output_path}}.

Output format — Core module code in labeled code blocks, one file per module, plus a short written summary of the app's structure and how to add a new provision rule.

Guardrails — Do not fabricate library APIs you have not been shown; ask for the documented interface if unclear. Flag any assumption about the XML schema or invoice format explicitly. Keep provisioning logic isolated from PDF rendering.

Example — {{repo_url}} = a Node ISDOC-PDF library, {{provision_rules}} = "10% for orders over 50,000 CZK."