Add UPDF2MD PDF-to-Markdown skill

[katsushi2441]

Summary

Adds a new updf2md skill for converting public PDF URLs into Markdown.

This skill is intended for:

• RAG pipelines
• document extraction workflows
• MCP / agent workflows
• paid production-style PDF parsing via Bankr x402

Included

• updf2md/SKILL.md
• updf2md/references/agent-instructions.md

Hosted endpoint

https://x402.bankr.bot/0x444fadbd6e1fed0cfbf7613b6c9f91b9021eecbd/updf2md

Demo

https://aiknowledgecms.exbridge.jp/updf2md.php

Pricing

• 0.001 USDC / request
• billed through Bankr x402

[katsushi2441]

Thanks for reviewing this.

A few details for maintainers:

• This skill is designed for public PDF URLs and returns Markdown optimized for agent workflows, document extraction, and RAG ingestion.
• The hosted endpoint is already live on Bankr x402:
  https://x402.bankr.bot/0x444fadbd6e1fed0cfbf7613b6c9f91b9021eecbd/updf2md
• A free public demo is also available:
  https://aiknowledgecms.exbridge.jp/updf2md.php
• Current pricing is 0.001 USDC / request
• The URL2AI agent profile on Bankr has also been populated and is currently awaiting approval.

Why this skill may be useful in the Bankr skills ecosystem:

• It gives agents a structured way to turn public PDFs into Markdown before summarization or retrieval.
• It is a good fit for RAG pipelines, report ingestion, research automation, and MCP-connected document workflows.
• It demonstrates a concrete x402 monetization pattern for a hosted content-processing endpoint.

Happy to adjust the folder structure, wording, or examples if there is a preferred convention for new skills in this repo.