Source: https://seerepo.com/compare/bojieli/ai-agent-book/vs/Stirling-Tools/Stirling-PDF
Markdown source: https://seerepo.com/compare/bojieli/ai-agent-book/vs/Stirling-Tools/Stirling-PDF.md
Description: ai-agent-book and Stirling-PDF share 5 technologies: React, Vite, FastAPI, Postgres, and PostHog. ai-agent-book is written in Python and Stirling-PDF in TypeScript.

# ai-agent-book vs Stirling-PDF

ai-agent-book and Stirling-PDF share 5 technologies: React, Vite, FastAPI, Postgres, and PostHog. ai-agent-book is written in Python and Stirling-PDF in TypeScript.

- [bojieli/ai-agent-book](https://seerepo.com/r/bojieli/ai-agent-book): 《深入理解 AI Agent：设计原理与工程实践》（李博杰 著）开源主仓库：全书正文、编译版 PDF 与按章配套代码
- [Stirling-Tools/Stirling-PDF](https://seerepo.com/r/Stirling-Tools/Stirling-PDF): #1 PDF Application on GitHub that lets you edit PDFs on any device anywhere

## What they share and what sets them apart

- In common: React, Vite, FastAPI, Postgres, PostHog
- Only in ai-agent-book: Next.js, Astro, Express, OpenAI, Anthropic, Google
- Only in Stirling-PDF: Spring, Supabase, Stripe, AWS S3

## Side by side

| | ai-agent-book | Stirling-PDF |
|---|---|---|
| Size | 422,452 lines written, 1,096 code files | 1,114,394 lines written, 4,302 code files |
| Who writes it | 20.8% of its commits signed by AI. With Claude Code | 2.1% of its commits signed by AI. With GitHub Copilot, Claude Code, and Codex |
| Activity | Last push October 8, 2026, 1,610 commits, 56,304 stars | Last push October 29, 2026, 5,694 commits, 95,274 stars |
| Tests | 624 test files. 34.1% of its code files have a test that imports them | 2,014 test files. 48.3% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, ai-agent-book or Stirling-PDF?

Stirling-PDF, with 1,114,394 lines written in 4,302 code files; ai-agent-book has 422,452 in 1,096.

The proof: [Stirling-Tools/Stirling-PDF's code at commit 96ee014](https://github.com/Stirling-Tools/Stirling-PDF/tree/96ee014b99a490822e9b9ea427afd13d76f9e5d4)

### Which has more GitHub stars, ai-agent-book or Stirling-PDF?

Stirling-PDF, with 95,274 stars; ai-agent-book has 56,304.

The proof: [Stirling-Tools/Stirling-PDF on GitHub](https://github.com/Stirling-Tools/Stirling-PDF)

### Which has more tests, ai-agent-book or Stirling-PDF?

Stirling-PDF, with 2,014 test files; ai-agent-book has 624.

The proof: [Stirling-Tools/Stirling-PDF's code at commit 96ee014](https://github.com/Stirling-Tools/Stirling-PDF/tree/96ee014b99a490822e9b9ea427afd13d76f9e5d4)

### Which was updated more recently, ai-agent-book or Stirling-PDF?

Stirling-PDF: its last push was on October 29, 2026, and ai-agent-book's on October 8, 2026.

The proof: [Stirling-Tools/Stirling-PDF's commits on GitHub](https://github.com/Stirling-Tools/Stirling-PDF/commits)

### Which has more commits signed by AI, ai-agent-book or Stirling-PDF?

ai-agent-book: an AI signed 20.8% of its commits, with Claude Code; in Stirling-PDF, 2.1%.

The proof: [the commits each tool signed in bojieli/ai-agent-book](https://seerepo.com/r/bojieli/ai-agent-book/ai)

## Sources

- bojieli/ai-agent-book: Read on October 28, 2026, at commit dbc046e (https://github.com/bojieli/ai-agent-book/tree/dbc046eb896ac4e39aa19c7774c8bf49583b89a6)
- Stirling-Tools/Stirling-PDF: Read on October 29, 2026, at commit 96ee014 (https://github.com/Stirling-Tools/Stirling-PDF/tree/96ee014b99a490822e9b9ea427afd13d76f9e5d4)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.