Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

When you type python in Command Prompt and see 'python' is not recogni...

Setup Cloudflare Origin Certificate for Nginx
If you use Cloudflare as a reverse proxy, enabling HTTPS between Cloudflare and your Nginx server...

Fix Git 'index.lock file exists' Error
When you see the error fatal: Unable to create 'path/.git/index.lock': File exists....

Fix VS Code 'Cannot Save File: Permission Denied' on Mac
You're editing a file in VS Code on your Mac, hit save, and get: 'Failed to save:...

Nginx Permission Denied After Restart: Fixes That Work
After restarting nginx, you might see errors like connect() to unix:/var/run/php-fpm.sock f...

Fix pnpm ERR_PNPM_OUTDATED_LOCKFILE Lockfile Error
When running pnpm install or pnpm update, you may see:
ER...