Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You run git stash and see: fatal: Unable to create 'path/.git/index.lock&#...

Fix VSCode Breakpoints Not Hit in launch.json
You set a breakpoint in Visual Studio Code, start debugging with a launch.json confi...

Fix Cloudflare 521 Error: SSL Configuration Steps
If you see a Cloudflare 521 error, it means Cloudflare can't establish a TCP connection to yo...

Fix git index.lock File Exists Error on Windows
If you see fatal: Unable to create 'index.lock': File exists. when running G...

Fixing Node.js Heap Out of Memory on Windows
If you see a FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - JavaScript heap out of me...

Windows 11 Update Stuck at 0%: Manual Download Fix
You click 'Check for updates' in Windows 11, and it hangs at 0% for minutes or hours. Res...