Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add smerchek/claude-epub-skill --skill markdown-to-epubgit clone --depth 1 https://github.com/smerchek/claude-epub-skillWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/smerchek/claude-epub-skill/markdown-to-epub)<a href="https://agentmods.dev/skills/smerchek/claude-epub-skill/markdown-to-epub"><img src="https://agentmods.dev/badge/skills/smerchek/claude-epub-skill/markdown-to-epub/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/smerchek/claude-epub-skill/markdown-to-epub"><img src="https://agentmods.dev/badge/skills/smerchek/claude-epub-skill/markdown-to-epub.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00031 | $0.01472 |
| Opus 5 | $0.00015 | $0.00736 |
| Sonnet 5 | $0.00006 | $0.00294 |
| Haiku 4.5 | $0.00003 | $0.00147 |
Grade A, and why
markdown-to-epub-converter scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 13d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
1 near-identical copy found in the catalogue:
- markdown-to-epub-converter — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 198 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Markdown to EPUB Converter Skill
This skill transforms markdown documents into professional EPUB ebook files. Perfect for converting research documents, blog posts, articles, or chat conversation summaries into portable, device-agnostic ebook formats.
Overview
The skill accepts markdown content in multiple formats and generates a properly formatted EPUB3 file that works across all major ebook readers including:
- Apple Books
- Amazon Kindle (via Kindle for Mac/Windows/iOS/Android)
- Google Play Books
- Kobo and other EPUB readers
- Any standard EPUB reader
Input Formats
Option 1: Raw Markdown Text
Provide markdown content directly in your message:
Convert this markdown to EPUB:
# My Book Title
## Chapter 1
This is chapter one content...
Option 2: File Path
Provide a path to a markdown file to be converted.
How It Works
-
Markdown Parsing: Analyzes your markdown and automatically:
- Treats H1 headers (
#) as chapter boundaries - Treats H2 headers (
##) as section headings within chapters - Preserves formatting (bold, italic, links, lists, code blocks)
- Treats H1 headers (
-
Structure Generation: Creates proper EPUB structure:
- Automatic table of contents from chapters
- Navigation document (EPUB3 standard)
- Metadata (title, language, etc.)
-
File Creation: Generates a valid EPUB3 file ready for download and use
Usage Examples
Example 1: Convert a Blog Post
"Convert this markdown blog post to EPUB:
How to Build a Simple Web Server
Introduction
...content..."
Example 2: Convert a Research Summary
"I have research notes in markdown format. Convert them to an EPUB ebook. The content is:
Research Project: Machine Learning Basics
Chapter 1: Fundamentals
..."
Example 3: Convert a Chat Summary
"Summarize our conversation so far as markdown and convert it to an EPUB for reference"
Output
The skill generates a downloadable EPUB file that includes:
- Professional formatting
- Automatic table of contents
- Proper chapter structure
- Support for markdown formatting elements:
- Headers (all levels)
- Bold and italic text
- Hyperlinks
- Lists (ordered and unordered)
- Code blocks and inline code
- Blockquotes
- Horizontal rules
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 13d ago First seen · 198 lines · 31 tokens per session scan A fa7ceaf36ab0
markdown-to-epub-converter is a skill published in the GitHub repository smerchek/claude-epub-skill (159 stars, last pushed 10mo ago), licensed MIT. It adds 31 tokens to every session and 1,472 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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