/pdf-to-md — Convert any document to clean markdown

Markdown is Claude's native format. PDFs cost 2–3× more tokens and bury content under formatting artifacts. Converting first cuts token usage 50–70% with no quality loss, and improves comprehension on multi-column or table-heavy PDFs.

Inputs

• $1 — input file path. Supported: .pdf, .docx, .pptx, .xlsx, .html, .epub, .csv, .xml.
• $2 — output path (optional). If omitted, writes alongside the input with the .md extension.

Steps

1. Validate input

Check that $1 exists and identify the format from the extension.