--- title: "book-gpt vs book-to-skill" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/fraserxu-book-gpt-vs-virgiliojr94-book-to-skill" tools: ["fraserxu-book-gpt", "virgiliojr94-book-to-skill"] --- # book-gpt vs book-to-skill *GraphCanon updated Sep 20, 2026* ## Verdict Pick book-gpt if book-GPT, primarily developed using TypeScript, enables users to upload a book and then interactively query its content; pick book-to-skill if book-to-skill is a Python-based tool that converts technical book PDFs into Claude Code skills, facilitating effective study and reference. [book-gpt](https://book-gpt.fraserxu.dev) reports 437 GitHub stars, 48 forks, and 10 open issues, last pushed Apr 3, 2023. [book-to-skill](https://github.com/virgiliojr94/book-to-skill) has 31k stars, 3.2k forks, and 16 open issues, last pushed Sep 17, 2026. Figures are from public GitHub metadata via [book-gpt's repository](https://github.com/fraserxu/book-gpt) and [book-to-skill's repository](https://github.com/virgiliojr94/book-to-skill). | | [book-gpt](/tools/fraserxu-book-gpt.md) | [book-to-skill](/tools/virgiliojr94-book-to-skill.md) | | --- | --- | --- | | Tagline | Upload a book, ask me anything about it. | Converts technical book PDFs into Claude Code skills for study and reference | | Stars | 437 | 31,078 | | Forks | 48 | 3,224 | | Open issues | 10 | 16 | | Language | TypeScript | Python | | Adopt for | Book-GPT, primarily developed using TypeScript, enables users to upload a book and then interactively query its content. | book-to-skill is a Python-based tool that converts technical book PDFs into Claude Code skills, facilitating effective study and reference. | | Persona | - | - | | Runtime | - | - | | License | - | MIT license applies to the converter code and skill definition in the repository, but not to any book or document processed with it. | | Categories | Data & Retrieval, Evaluation & Observability | AI Agents, Data & Retrieval, Developer Tools | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [book-gpt](/tools/fraserxu-book-gpt.md) | [book-to-skill](/tools/virgiliojr94-book-to-skill.md) | | --- | --- | --- | | Maintenance | Dormant (18%) | Very active (96%) | | Days since push | 1265d | 0d | | Open issues (now) | 10 | 16 | | Stars delta | +1 (30d) | Unknown | | Open issues delta | 0 (30d) | Unknown | | Full report | [trust report](/tools/fraserxu-book-gpt/trust.md) | [trust report](/tools/virgiliojr94-book-to-skill/trust.md) | **Typed relationship:** book-gpt _(alternative)_ book-to-skill Both repositories aim to convert books into a format where they can be queried, but they likely use different methods or have different features. ## Decision facts: book-gpt - **Adopt for:** Book-GPT, primarily developed using TypeScript, enables users to upload a book and then interactively query its content. ## Decision facts: book-to-skill - **Pricing:** freemium - The tool is free to use under the MIT license, but any books or documents processed with it are subject to their own licensing. - **Requirements:** Min 2 GB RAM; Requires Python environment to run the tool. - **Adopt for:** book-to-skill is a Python-based tool that converts technical book PDFs into Claude Code skills, facilitating effective study and reference. - **License detail:** MIT license applies to the converter code and skill definition in the repository, but not to any book or document processed with it. ## Choose when ### Choose book-gpt if… - book-gpt is primarily TypeScript; book-to-skill is Python. - Both repositories aim to convert books into a format where they can be queried, but they likely use different methods or have different features. - Tags unique to book-gpt: typescript. - Also covers Evaluation & Observability. - When you need an interactive way to explore the content of specific books with detailed queries. ### Choose book-to-skill if… - book-to-skill is primarily Python; book-gpt is TypeScript. - Pricing: The tool is free to use under the MIT license, but any books or documents processed with it are subject to their own licensing.. - Requirements: Min 2 GB RAM; Requires Python environment to run the tool.. - Both repositories aim to convert books into a format where they can be queried, but they likely use different methods or have different features. - Tags unique to book-to-skill: agent-skills, ai-agents, book-to-skill, context-engineering. - Also covers AI Agents, Developer Tools. - When you need to convert technical book PDFs into a format that can be easily studied and referenced using Claude Code skills. ## When NOT to use book-gpt - If your project requires customization across various development libraries, since Book-GPT is specifically developed in TypeScript. - When support for multiple formats beyond those currently available in the project is required; this indicates ongoing work to expand format compatibility. ## When NOT to use book-to-skill - If your goal is to convert non-technical books or documents that do not require the specific format of Claude Code skills. - When you are looking for a tool that processes and converts documents into formats other than those compatible with Claude Code. ## Common questions ### What is the difference between book-gpt and book-to-skill? book-gpt: Upload a book, ask me anything about it.. book-to-skill: Converts technical book PDFs into Claude Code skills for study and reference. See the comparison table for live GitHub stats and shared categories. ### When should I choose book-gpt over book-to-skill? Choose book-gpt over book-to-skill when book-gpt is primarily TypeScript; book-to-skill is Python; Both repositories aim to convert books into a format where they can be queried, but they likely use different methods or have different features; Tags unique to book-gpt: typescript; Also covers Evaluation & Observability; When you need an interactive way to explore the content of specific books with detailed queries. ### When should I choose book-to-skill over book-gpt? Choose book-to-skill over book-gpt when book-to-skill is primarily Python; book-gpt is TypeScript; Pricing: The tool is free to use under the MIT license, but any books or documents processed with it are subject to their own licensing.; Requirements: Min 2 GB RAM; Requires Python environment to run the tool.; Both repositories aim to convert books into a format where they can be queried, but they likely use different methods or have different features; Tags unique to book-to-skill: agent-skills, ai-agents, book-to-skill, context-engineering; Also covers AI Agents, Developer Tools; When you need to convert technical book PDFs into a format that can be easily studied and referenced using Claude Code skills. ### When should I avoid book-gpt? If your project requires customization across various development libraries, since Book-GPT is specifically developed in TypeScript. When support for multiple formats beyond those currently available in the project is required; this indicates ongoing work to expand format compatibility. ### When should I avoid book-to-skill? If your goal is to convert non-technical books or documents that do not require the specific format of Claude Code skills. When you are looking for a tool that processes and converts documents into formats other than those compatible with Claude Code. ### Is book-gpt or book-to-skill more popular on GitHub? book-to-skill has more GitHub stars (31,078 vs 437). Stars measure visibility, not whether either tool fits your constraints. ### Are book-gpt and book-to-skill open source? Yes - both are open-source projects on GitHub. ### Where can I find alternatives to book-gpt or book-to-skill? GraphCanon lists graph-backed alternatives at [book-gpt alternatives](/tools/fraserxu-book-gpt/alternatives) and [book-to-skill alternatives](/tools/virgiliojr94-book-to-skill/alternatives) ([book-gpt markdown twin](/tools/fraserxu-book-gpt/alternatives.md), [book-to-skill markdown twin](/tools/virgiliojr94-book-to-skill/alternatives.md)), ranked by typed relationship edges rather than popularity votes. ### Is there a machine-readable version of this comparison? Yes. The markdown twin at [this comparison](/compare/fraserxu-book-gpt-vs-virgiliojr94-book-to-skill.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, book-gpt or book-to-skill? book-gpt: Dormant. book-to-skill: Very active. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance. ### Where are the full trust reports for book-gpt and book-to-skill? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [book-gpt trust report](/tools/fraserxu-book-gpt/trust); [book-to-skill trust report](/tools/virgiliojr94-book-to-skill/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=fraserxu-book-gpt`](/api/graphcanon/graph?tool=fraserxu-book-gpt) - LLM index: [/llms.txt](/llms.txt) - Full corpus: [/llms-full.txt](/llms-full.txt) _GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_