Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

If you're seeing fatal: unable to access 'https://...' : Failed to connect ...:...

Fix VS Code Terminal Not Opening PowerShell
If you click the terminal panel in VS Code and nothing happens, or it opens a blank shell instead...

Fix DNS Probe Finished NXDOMAIN on Google DNS Setup
If you see "DNS probe finished NXDOMAIN" in your browser, it means your device couldn'...

How to Fix Git 'index.lock' File Exists Error
When you see fatal: Unable to create 'path/.git/index.lock': File exists., G...

Fix Docker Compose Environment Variable Missing Errors
You run docker-compose up and see errors like WARNING: The VARIABLE_NAME varia...

Node.js Heap Out of Memory Troubleshooting Checklist
When a Node.js process crashes with FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - Ja...