Source: https://seerepo.com/compare/bojieli/ai-agent-book/vs/upscayl/upscayl
Markdown source: https://seerepo.com/compare/bojieli/ai-agent-book/vs/upscayl/upscayl.md
Description: ai-agent-book and upscayl share 3 technologies: React, Next.js, and PostHog. ai-agent-book is written in Python and upscayl in TypeScript.

# ai-agent-book vs upscayl

ai-agent-book and upscayl share 3 technologies: React, Next.js, and PostHog. ai-agent-book is written in Python and upscayl 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
- [upscayl/upscayl](https://seerepo.com/r/upscayl/upscayl): 🆙 Upscayl - #1 Free and Open Source AI Image Upscaler for Linux, MacOS and Windows.

## What they share and what sets them apart

- In common: React, Next.js, PostHog
- Only in ai-agent-book: Vite, Astro, Express, FastAPI, Postgres, OpenAI, Anthropic, Google
- Only in upscayl: Firebase

## Side by side

| | ai-agent-book | upscayl |
|---|---|---|
| Size | 422,452 lines written, 1,079 code files | 8,069 lines written, 109 code files |
| Who writes it | 20.8% of its commits signed by AI. With Claude Code | 0.1% of its commits signed by AI. With CodeRabbit |
| Activity | Last push October 8, 2026, 1,610 commits, 56,633 stars | Last push October 5, 2026, 994 commits, 51,330 stars |
| Tests | 624 test files. 33.9% of its code files have a test that imports them | 1 test files |

- 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 upscayl?

ai-agent-book, with 422,452 lines written in 1,079 code files; upscayl has 8,069 in 109.

The proof: [bojieli/ai-agent-book's code at commit dbc046e](https://github.com/bojieli/ai-agent-book/tree/dbc046eb896ac4e39aa19c7774c8bf49583b89a6)

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

ai-agent-book, with 56,633 stars; upscayl has 51,330.

The proof: [bojieli/ai-agent-book on GitHub](https://github.com/bojieli/ai-agent-book)

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

ai-agent-book, with 624 test files; upscayl has 1.

The proof: [bojieli/ai-agent-book's code at commit dbc046e](https://github.com/bojieli/ai-agent-book/tree/dbc046eb896ac4e39aa19c7774c8bf49583b89a6)

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

ai-agent-book: its last push was on October 8, 2026, and upscayl's on October 5, 2026.

The proof: [bojieli/ai-agent-book's commits on GitHub](https://github.com/bojieli/ai-agent-book/commits)

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

ai-agent-book: an AI signed 20.8% of its commits, with Claude Code; in upscayl, 0.1%.

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 30, 2026, at commit dbc046e (https://github.com/bojieli/ai-agent-book/tree/dbc046eb896ac4e39aa19c7774c8bf49583b89a6)
- upscayl/upscayl: Read on October 30, 2026, at commit a00d55f (https://github.com/upscayl/upscayl/tree/a00d55fee90e0f9435d5eaa86e76700df8199af8)

## 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.