book-to-skill vs claude-obsidian
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
Open source · MIT
Turns a technical book or document folder into a structured skill your AI coding agent can query.
Open source · MIT
A free plugin that makes Claude Code build a linked Markdown wiki in your Obsidian vault.
The short answer
Choose book-to-skill if you need…
- Developers who want to query a technical book from inside their coding agent
- People who re-read reference material often and want it searchable by an agent
- Teams turning internal docs, runbooks, or specs into a queryable skill
- Users of hosts that support the Agent Skills standard, such as Claude Code or Codex
Choose claude-obsidian if you need…
- People who already use Obsidian and want an AI assistant to organize incoming notes
- Users comfortable running Claude Code in a terminal
- Anyone who wants their notes kept as plain Markdown files they own
- Researchers who want answers with citations drawn from their own vault
Side-by-side
| book-to-skill | claude-obsidian | |
|---|---|---|
| Type | Dev tool | Dev tool |
| Price | Free and open source | Free and open source |
| Licence | MIT | MIT |
| GitHub stars | 36.7k | 16.1k |
| Setup difficulty | Intermediate | Intermediate |
| How you get it | Install with a package manager | Install with a package manager |
| Main language | Python | Python |
| Last code update | 9 days ago | 12 days ago |
What each one is
book-to-skill
book-to-skill takes a technical book PDF (or other documents such as EPUB, DOCX, or Markdown, per the README badges) and converts it into an agent skill: a folder with a core SKILL.md, per-chapter files, a glossary, patterns, and a cheatsheet. It is meant to be loaded by AI coding agents like Claude Code so you can ask questions about the book while you work, and the README says this uses fewer tokens than pasting the whole book into context.
claude-obsidian
claude-obsidian is a plugin for Claude Code that works with Obsidian, a note-taking app. You drop sources such as articles, papers or notes into an inbox folder, and Claude reads them, writes linked notes with source references, and files them into one connected graph of plain Markdown files stored on your own computer. It is based on Andrej Karpathy's LLM Wiki pattern as described in the README.
Best for
book-to-skill
- Developers who want to query a technical book from inside their coding agent
- People who re-read reference material often and want it searchable by an agent
- Teams turning internal docs, runbooks, or specs into a queryable skill
- Users of hosts that support the Agent Skills standard, such as Claude Code or Codex
claude-obsidian
- People who already use Obsidian and want an AI assistant to organize incoming notes
- Users comfortable running Claude Code in a terminal
- Anyone who wants their notes kept as plain Markdown files they own
- Researchers who want answers with citations drawn from their own vault
Strengths
book-to-skill
- The README describes a structured output with on-demand chapter loading, which keeps context small
- Works across several agent hosts that share the open Agent Skills SKILL.md format
- MIT licensed and actively pushed
claude-obsidian
- Notes stay as plain Markdown files on your computer, with no telemetry described in the README
- Originals in inbox/ are kept untouched so summaries can point back to sources
- MIT licensed and free, with a health-check skill for keeping the vault tidy
Not ideal for
book-to-skill
- People who only want to read a book normally, since the output is a skill for agents, not a reading app
- Users without an AI agent host, because the generated skill is meant to be loaded by one
- Anyone needing verified accuracy on legal or safety-critical content, since the README does not describe a review process for correctness
claude-obsidian
- People who do not use Claude Code, since the plugin is built for it (other hosts are listed but need extra setup)
- Windows users who want to write to the vault natively, since the README says WSL is needed for writes
- Anyone wanting a hosted, cloud-synced note app, since the README stresses local files and no cloud database
Trade-offs
book-to-skill
- The README's token-savings figures come from the project's own measurements on real books; treat them as its claims
- Output quality depends on the source file and on the agent following the generator spec; scanned PDFs have needed fixes according to the README's use-case notes
- Publishing to GitHub is optional and private by default, but the README mentions it, so users should review that step
claude-obsidian
- Requires Claude Code and Python 3.11 or newer, so it has setup costs and an ongoing AI tool dependency
- The README says Windows writes need WSL, which adds friction on that platform
- The README's own feature list is long (15 skills, 3 agents); some pieces are optional and not fully explained in the truncated text
Getting started
book-to-skill
Install via the cross-agent skills CLI
npx skills add virgiliojr94/book-to-skillOr clone manually into Claude Code skills folder
git clone https://github.com/virgiliojr94/book-to-skill.git ~/.claude/skills/book-to-skillclaude-obsidian
Add the plugin marketplace
claude plugin marketplace add AgriciDaniel/claude-obsidianInstall the plugin
claude plugin install claude-obsidian@agricidaniel-claude-obsidianFrequently asked questions
What is the difference between book-to-skill and claude-obsidian?
book-to-skill: Turns a technical book or document folder into a structured skill your AI coding agent can query. claude-obsidian: A free plugin that makes Claude Code build a linked Markdown wiki in your Obsidian vault. book-to-skill suits developers who want to query a technical book from inside their coding agent, while claude-obsidian suits people who already use obsidian and want an ai assistant to organize incoming notes.
Are book-to-skill and claude-obsidian free?
book-to-skill: Free and open source. claude-obsidian: Free and open source.
Is book-to-skill or claude-obsidian more popular?
book-to-skill has more GitHub stars (36.7k) than claude-obsidian (16.1k). Popularity isn't the same as fit — check which one matches your use case above.
What are other alternatives to book-to-skill and claude-obsidian?
Other options people compare them with include Trail-code, planning-with-files, promptfoo, Agentic Awesome Skills, wshobson/agents.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.