Source: https://seerepo.com/compare/bojieli/ai-agent-book/vs/calcom/cal.diy
Markdown source: https://seerepo.com/compare/bojieli/ai-agent-book/vs/calcom/cal.diy.md
Description: ai-agent-book and cal.diy share 5 technologies: React, Next.js, Postgres, Google, and PostHog. ai-agent-book is written in Python and cal.diy in TypeScript.

# ai-agent-book vs cal.diy

ai-agent-book and cal.diy share 5 technologies: React, Next.js, Postgres, Google, and PostHog. ai-agent-book is written in Python and cal.diy 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
- [calcom/cal.diy](https://seerepo.com/r/calcom/cal.diy): Scheduling infrastructure for absolutely everyone.

## What they share and what sets them apart

- In common: React, Next.js, Postgres, Google, PostHog
- Only in ai-agent-book: Vite, Astro, Express, FastAPI, OpenAI, Anthropic
- Only in cal.diy: Redis, Sentry, Stripe

## Side by side

| | ai-agent-book | cal.diy |
|---|---|---|
| Size | 422,452 lines written, 1,096 code files | 554,251 lines written, 4,310 code files |
| Who writes it | 20.8% of its commits signed by AI. With Claude Code | 6.3% of its commits signed by AI. With Devin, Claude Code, CodeRabbit, Cursor, and GitHub Copilot |
| Activity | Last push October 8, 2026, 1,610 commits, 56,304 stars | Last push October 27, 2026, 16,059 commits, 49,471 stars |
| Tests | 624 test files. 34.1% of its code files have a test that imports them | 641 test files. 14.7% 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 cal.diy?

cal.diy, with 554,251 lines written in 4,310 code files; ai-agent-book has 422,452 in 1,096.

The proof: [calcom/cal.diy's code at commit 56da01b](https://github.com/calcom/cal.diy/tree/56da01b4b1664894b784aca636eccab0c56cc141)

### Which has more GitHub stars, ai-agent-book or cal.diy?

ai-agent-book, with 56,304 stars; cal.diy has 49,471.

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

### Which has more tests, ai-agent-book or cal.diy?

cal.diy, with 641 test files; ai-agent-book has 624.

The proof: [calcom/cal.diy's code at commit 56da01b](https://github.com/calcom/cal.diy/tree/56da01b4b1664894b784aca636eccab0c56cc141)

### Which was updated more recently, ai-agent-book or cal.diy?

cal.diy: its last push was on October 27, 2026, and ai-agent-book's on October 8, 2026.

The proof: [calcom/cal.diy's commits on GitHub](https://github.com/calcom/cal.diy/commits)

### Which has more commits signed by AI, ai-agent-book or cal.diy?

ai-agent-book: an AI signed 20.8% of its commits, with Claude Code; in cal.diy, 6.3%.

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)
- calcom/cal.diy: Read on October 28, 2026, at commit 56da01b (https://github.com/calcom/cal.diy/tree/56da01b4b1664894b784aca636eccab0c56cc141)

## 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.