Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

When you run npx some-package and see an error like “npm package json not found”...

How to Manually Remove a Stuck Git index.lock File
If Git operations suddenly fail with an error like fatal: Unable to create 'path/.git/i...

Fix Node.js Heap Out of Memory Error in PM2 If you're running a Node.js application under PM2 and seeing FATAL ERROR: CALL_AND_RETR...

Fix DNS Probe Finished NXDOMAIN After Windows Update After a Windows update, some users see the error 'DNS_PROBE_FINISHED_NXDOMAIN' in Chrome ...

Fix Docker Compose Port Already Allocated on Linux You run docker-compose up and get an error like Error starting userland proxy:...

Fix VS Code Git Authentication Failed After Update After updating Visual Studio Code, you may see an error like "Git: Authentication failed"...