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hello-agents vs cs249r_book

hello-agents and cs249r_book share 31 technologies: OpenAI, anyio, Vite, React, cycler, fonttools, contourpy, Plotly, matplotlib, Rich, torch, transformers, scikit-learn, sentence-transformers, lxml, xlrd, pillow, beautifulsoup4, jinja2, annotated-types, pydantic-core, Pydantic, jsonschema, D3, katex, Tailwind CSS, markdown-it, Chart.js, dompurify, Mermaid, and jspdf. Both are written in Python.

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What they share and what sets them apart

datawhalechina

hello-agents

📚 《从零开始构建智能体》——从零开始的智能体原理与实践教程

Python86kRead on November 4, 2026, at commit 36f583cWhat is hello-agents built with?

Only in hello-agents

In common

harvard-edge

cs249r_book

Machine Learning Systems: Foundations, Scaling, Agentic AI, and Physical AI (Vols I–IV) • Harvard CS249r | https://mlsysbook.ai

Python30kRead on November 8, 2026, at commit de87c01What is cs249r_book built with?

Only in cs249r_book

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
hello-agents226,661 lines written1,212 code files
cs249r_book821,581 lines written1,977 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
hello-agents2.4% of its commits signed by AIWith Codex, Cursor, and Claude Code
cs249r_book2.7% of its commits signed by AIWith Codex, Claude Code, Gemini CLI, and Cursor
ActivityFrom GitHub and its history, on the day SeeRepo read it.
hello-agentsLast push October 13, 2026660 commits86,039 stars
cs249r_bookLast push November 8, 202622,351 commits30,011 stars
TestsThe files that test the code, and the share of code files a test imports.
hello-agents97 test files6.9% of its code files have a test that imports them
cs249r_book629 test files16.6% of its code files have a test that imports them

Frequently asked questions

Which is bigger, hello-agents or cs249r_book?
cs249r_book, with 821,581 lines written; hello-agents has 226,661.

The proof: harvard-edge/cs249r_book's code at commit de87c01

Which has more GitHub stars, hello-agents or cs249r_book?
hello-agents, with 86,039 stars; cs249r_book has 30,011.

The proof: datawhalechina/hello-agents on GitHub

Which has more tests, hello-agents or cs249r_book?
cs249r_book, with 629 test files; hello-agents has 97.

The proof: harvard-edge/cs249r_book's code at commit de87c01

Which was updated more recently, hello-agents or cs249r_book?
cs249r_book: its last push was on November 8, 2026, and hello-agents's on October 13, 2026.

The proof: harvard-edge/cs249r_book's commits on GitHub

Which has more commits signed by AI, hello-agents or cs249r_book?
cs249r_book: an AI signed 2.7% of its commits, with Codex, Claude Code, Gemini CLI, and Cursor; in hello-agents, 2.4%.

The proof: the commits each tool signed in harvard-edge/cs249r_book

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