Source: https://seerepo.com/compare/datawhalechina/hello-agents/vs/harvard-edge/cs249r_book
Markdown source: https://seerepo.com/compare/datawhalechina/hello-agents/vs/harvard-edge/cs249r_book.md
Description: 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.

# 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.

- [datawhalechina/hello-agents](https://seerepo.com/r/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
- [harvard-edge/cs249r_book](https://seerepo.com/r/harvard-edge/cs249r_book): Machine Learning Systems: Foundations, Scaling, Agentic AI, and Physical AI (Vols I–IV) • Harvard CS249r | https://mlsysbook.ai

## What they share and what sets them apart

- In common: 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, jspdf
- Only in hello-agents: FastAPI, uvicorn, aiosqlite, asyncpg, psycopg2-binary, Postgres, chromadb, Redis, SQLite, oracledb, pymilvus, Qdrant, Hugging Face, Flask, fastmcp, starlette, AIOHTTP, Streamlit, Vue, vue-router, react-router-dom, Gradio, alembic, SQLAlchemy, bcrypt, accelerate, MCP, onnxruntime, peft, safetensors, tavily-python, tokenizers, tiktoken, datasets, langchain-openai, LangGraph, paddlenlp, rank-bm25, spaCy, markdown, openpyxl, pdfminer.six, pypdf, python-docx, reportlab, pdfplumber, feedparser, pymupdf, email-validator, OpenTelemetry, opentelemetry-exporter-otlp-proto-grpc, loguru, vue-flow, vue-chartjs, highlight.js, marked, react-markdown, Element, echarts, Leaflet, html2canvas
- Only in cs249r_book: async-lru, pyzmq, requests-cache, pyarrow, jupyter-core, jupyterlab-server, tornado, idb, Next.js, jupyterlab-pygments, soupsieve, tinycss2, ipywidgets, jupyter-server-terminals, jupyterlab-widgets, matplotlib-inline, prompt-toolkit, seaborn, widgetsnbextension, argon2-cffi, argon2-cffi-bindings, groq, Ollama, torchvision, librosa, nltk, torch-geometric, bleach, defusedxml, ghostscript, markdown-it-py, markupsafe, mdurl, mistune, nbconvert, pandocfilters, pylatexenc, pypandoc, python-frontmatter, tablib, webencodings, xlwt, xmltodict, jupytext, nbformat, cattrs, fastjsonschema, fqdn, jsonschema-specifications, referencing, rfc3339-validator, rfc3986-validator, prometheus-client, python-json-logger, psutil, compromise, markdown-it-container, jspdf-autotable, Framer, react-medium-image-zoom, Lucide

## Side by side

| | hello-agents | cs249r_book |
|---|---|---|
| Size | 226,661 lines written, 1,212 code files | 821,581 lines written, 1,977 code files |
| Who writes it | 2.4% of its commits signed by AI. With Codex, Cursor, and Claude Code | 2.7% of its commits signed by AI. With Codex, Claude Code, Gemini CLI, and Cursor |
| Activity | Last push October 13, 2026, 660 commits, 86,039 stars | Last push November 8, 2026, 22,351 commits, 30,011 stars |
| Tests | 97 test files. 6.9% of its code files have a test that imports them | 629 test files. 16.6% 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, 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](https://github.com/harvard-edge/cs249r_book/tree/de87c0103806d7bfb1c677dbb77a2b92fa00c298)

### 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](https://github.com/datawhalechina/hello-agents)

### 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](https://github.com/harvard-edge/cs249r_book/tree/de87c0103806d7bfb1c677dbb77a2b92fa00c298)

### 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](https://github.com/harvard-edge/cs249r_book/commits)

### 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](https://seerepo.com/r/harvard-edge/cs249r_book/ai)

## Sources

- datawhalechina/hello-agents: Read on November 4, 2026, at commit 36f583c (https://github.com/datawhalechina/hello-agents/tree/36f583c233ea5cee4537ef93455702b55053af18)
- harvard-edge/cs249r_book: Read on November 8, 2026, at commit de87c01 (https://github.com/harvard-edge/cs249r_book/tree/de87c0103806d7bfb1c677dbb77a2b92fa00c298)

## 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.