Checklists for software errors, setup, and tool workflows.

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Fix npm run build failing due to ESLint errors

You run npm run build and it fails with a wall of ESLint errors. This is common when...

Fix DNS Probe Finished NXDOMAIN on Custom DNS Server

If you see “DNS PROBE FINISHED NXDOMAIN” in Chrome or another browser while using a custom DNS se...

Fix Node Sass Build Failed with Visual Studio Build Tools

When you see node-sass build failed during an npm install, it usually means the nati...

Fix Cloudflare Wildcard Subdomain Not Resolving

You set up a wildcard DNS record in Cloudflare (e.g., *.example.com) expecting all s...

Fix npm 'package.json not found' Error in Subdirectories

You're working in a subdirectory of your project, run npm install or npm r...

Windows 11 Wi-Fi Connected but No Internet: Step-by-Step Fix
You're connected to Wi-Fi, but websites won't load and apps show no internet. This is a c...