Source: https://seerepo.com/compare/microsoft/playwright/vs/walkinglabs/learn-harness-engineering
Markdown source: https://seerepo.com/compare/microsoft/playwright/vs/walkinglabs/learn-harness-engineering.md
Description: playwright and learn-harness-engineering share 3 technologies: React, Electron, and Vite. Both are written in TypeScript.

# playwright vs learn-harness-engineering

playwright and learn-harness-engineering share 3 technologies: React, Electron, and Vite. Both are written in TypeScript.

- [microsoft/playwright](https://seerepo.com/r/microsoft/playwright): Playwright is a framework for Web Testing and Automation. It allows testing Chromium, Firefox and WebKit with a single API. 
- [walkinglabs/learn-harness-engineering](https://seerepo.com/r/walkinglabs/learn-harness-engineering): Harness engineering beginner tutorial, from 0 to 1

## What they share and what sets them apart

- In common: React, Electron, Vite
- Only in playwright: DuckDB, MCP, xml2js, yaml, jpeg-js, pngjs, enquirer, Zod, zod-to-json-schema, xterm, codemirror
- Only in learn-harness-engineering: fonttools, cairosvg

## Side by side

| | playwright | learn-harness-engineering |
|---|---|---|
| Size | 652,505 lines written, 679 code files | 70,426 lines written, 205 code files |
| Who writes it | 0.5% of its commits signed by AI. With GitHub Copilot, Claude Code, and Cursor | 22% of its commits signed by AI. With Claude Code, GitHub Copilot, and Cursor |
| Activity | Last push November 4, 2026, 18,394 commits, 99,277 stars | Last push October 22, 2026, 223 commits, 23,149 stars |
| Tests | 844 test files. 10% 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, playwright or learn-harness-engineering?

playwright, with 652,505 lines written; learn-harness-engineering has 70,426.

The proof: [microsoft/playwright's code at commit 1af60d9](https://github.com/microsoft/playwright/tree/1af60d94ac714d4007828bafa02b0f1cbd8646b9)

### Which has more GitHub stars, playwright or learn-harness-engineering?

playwright, with 99,277 stars; learn-harness-engineering has 23,149.

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

### Which has more tests, playwright or learn-harness-engineering?

playwright, with 844 test files; learn-harness-engineering has 1.

The proof: [microsoft/playwright's code at commit 1af60d9](https://github.com/microsoft/playwright/tree/1af60d94ac714d4007828bafa02b0f1cbd8646b9)

### Which was updated more recently, playwright or learn-harness-engineering?

playwright: its last push was on November 4, 2026, and learn-harness-engineering's on October 22, 2026.

The proof: [microsoft/playwright's commits on GitHub](https://github.com/microsoft/playwright/commits)

### Which has more commits signed by AI, playwright or learn-harness-engineering?

learn-harness-engineering: an AI signed 22% of its commits, with Claude Code, GitHub Copilot, and Cursor; in playwright, 0.5%.

The proof: [the commits each tool signed in walkinglabs/learn-harness-engineering](https://seerepo.com/r/walkinglabs/learn-harness-engineering/ai)

## Sources

- microsoft/playwright: Read on November 4, 2026, at commit 1af60d9 (https://github.com/microsoft/playwright/tree/1af60d94ac714d4007828bafa02b0f1cbd8646b9)
- walkinglabs/learn-harness-engineering: Read on November 4, 2026, at commit a9342ff (https://github.com/walkinglabs/learn-harness-engineering/tree/a9342ff471f2c0e60be0c08b9f4a7c502df4e442)

## 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.