Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You try to install or run a package and get an error like package requires a different Node...

Fix ENOENT Error: package.json Not Found in React App
When running npm start or npm install in a React app, you may see an er...

Fix 'npm install' Permission Denied When Using Yarn
You run yarn install in a project and later try npm install only to hit...

Fix Cloudflare Origin Certificate Mismatch Errors
If you see 'Origin Certificate Mismatch' in Cloudflare or browser warnings, it usually me...

Fix 'Python' Command Not Found in Windows 10
When you type python in Command Prompt and see 'python' is not recogni...

Handling Missing Peer Dependencies in pnpm Install
When you run pnpm install and see warnings about missing peer dependencies, your pro...