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How to check and fix an old Markdown conversion against its PDF with LT2 MD

Re-verify a Markdown file you converted earlier, page by page, and fix errors and omissions.

  • Research
  • Intermediate
  • 30 minutes
  • From the README
  • Claude Code
  • Codex

Who it is forSomeone sitting on a folder of Markdown from other tools or a quick earlier attempt who no longer trusts the typos, broken formulas, or wrong page numbers.

The problemThe old Markdown is too useful to discard but too risky to use as-is, and rechecking it by hand against the PDF is slow.

The outcomeA corrected Markdown file in which wrong paragraphs are re-recognized from the page, missing blocks are added, figures get descriptions, and a list of touched pages explains each change.

What you need first

  • Python installed on Windows, Linux, or macOS
  • git installed to clone the repository
  • A supported AI agent that can load the skill (the README names Claude Code and Codex)
  • The PDF file to convert, with the page range you want
  • A host model that can understand images, since transcription quality depends on it

Steps

  1. Clone the skill into your agent's skills directory, for example git clone https://github.com/libnyx/LT2MD.git ~/.codex/skills/LT2MD on macOS or Linux with Codex.
  2. Give the agent the existing Markdown file and the matching source PDF.
  3. Ask the agent to check each block against the PDF, re-recognize errors and omissions, and report what it changed.
  4. Review the list of touched pages and the changes for the pages you care most about.

Prompt for your agent

Use the LT2MD skill in the libnyx/LT2MD repo to check <path to existing Markdown> against its source PDF <path to PDF>. Re-recognize any paragraph that is wrong or missing, verify formulas and figures against the source, and list every page you changed. Expected output: a corrected Markdown file and a change report; verify three changed pages against the PDF by hand.

Caveat. The skill treats the old Markdown as a candidate, so spot-check the change report against the PDF before relying on the repaired file.

Use this in your AI agent

Ask your agent

Using the Deduped MCP, get the setup steps for libnyx/LT2MD and "Check and fix an old Markdown conversion against its PDF"

Add Deduped to Claude Code once

claude mcp add --transport http deduped https://dedupedai.com/mcp

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