Source: https://seerepo.com/compare/Fission-AI/OpenSpec/vs/react/react
Markdown source: https://seerepo.com/compare/Fission-AI/OpenSpec/vs/react/react.md
Description: OpenSpec and react share 3 technologies: Tailwind CSS, ora, and Zod. OpenSpec is written in TypeScript and react in JavaScript.

# OpenSpec vs react

OpenSpec and react share 3 technologies: Tailwind CSS, ora, and Zod. OpenSpec is written in TypeScript and react in JavaScript.

- [Fission-AI/OpenSpec](https://seerepo.com/r/Fission-AI/OpenSpec): Spec-driven development (SDD) for AI coding assistants.
- [react/react](https://seerepo.com/r/react/react): The library for web and native user interfaces.

## What they share and what sets them apart

- In common: Tailwind CSS, ora, Zod
- Only in OpenSpec: Inquirer, yaml
- Only in react: React, Next.js, MCP, Electron, monaco-editor, @heroicons/react, Cheerio, html-to-text, react-window, prop-types

## Side by side

| | OpenSpec | react |
|---|---|---|
| Size | 144,693 lines written, 218 code files | 833,946 lines written, 1,570 code files |
| Who writes it | 28.9% of its commits signed by AI. With Claude Code, Codex, CodeRabbit, Cursor, Mistral Vibe, GitHub Copilot, Qwen Code, and Crush | 0.2% of its commits signed by AI. With Claude Code, Cursor, Codex, and Amp |
| Activity | Last push November 4, 2026, 967 commits, 73,952 stars | Last push October 31, 2026, 19,152 commits, 251,911 stars |
| Tests | 245 test files. 74.3% of its code files have a test that imports them | 2,826 test files. 11.1% 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, OpenSpec or react?

react, with 833,946 lines written; OpenSpec has 144,693.

The proof: [react/react's code at commit 76baa3b](https://github.com/react/react/tree/76baa3b5434fad315ece9cfd4d20d7a8d6c34a25)

### Which has more GitHub stars, OpenSpec or react?

react, with 251,911 stars; OpenSpec has 73,952.

The proof: [react/react on GitHub](https://github.com/react/react)

### Which has more tests, OpenSpec or react?

react, with 2,826 test files; OpenSpec has 245.

The proof: [react/react's code at commit 76baa3b](https://github.com/react/react/tree/76baa3b5434fad315ece9cfd4d20d7a8d6c34a25)

### Which was updated more recently, OpenSpec or react?

OpenSpec: its last push was on November 4, 2026, and react's on October 31, 2026.

The proof: [Fission-AI/OpenSpec's commits on GitHub](https://github.com/Fission-AI/OpenSpec/commits)

### Which has more commits signed by AI, OpenSpec or react?

OpenSpec: an AI signed 28.9% of its commits, with Claude Code, Codex, CodeRabbit, Cursor, Mistral Vibe, GitHub Copilot, Qwen Code, and Crush; in react, 0.2%.

The proof: [the commits each tool signed in Fission-AI/OpenSpec](https://seerepo.com/r/Fission-AI/OpenSpec/ai)

## Sources

- Fission-AI/OpenSpec: Read on November 5, 2026, at commit 3e4d5f0 (https://github.com/Fission-AI/OpenSpec/tree/3e4d5f0769e2857c8eb54f149cbf5e4f703fa04c)
- react/react: Read on November 4, 2026, at commit 76baa3b (https://github.com/react/react/tree/76baa3b5434fad315ece9cfd4d20d7a8d6c34a25)

## 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.