Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

Fix Git 'index.lock' File Exists Error in IntelliJ

If you see an error like fatal: Unable to create 'project/.git/index.lock': File ex...

Chrome Startup Crash on Windows 11: Fixes That Work
You click the Chrome icon on your Windows 11 PC, the window flickers, and then nothing—or you get...

Fix Git SSL Certificate Problem on macOS: Unable to Get Local Issuer
If you're seeing fatal: unable to access 'https://...': SSL certificate problem...

How to Recover from a Detached HEAD in Git After a Rebase
You're in the middle of a rebase, you see a message like 'detached HEAD', and you'...

Nginx Upstream Connection Refused: Diagnosis and Fixes
When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...

Fix Angular Breakpoints Not Hit in VS Code
You set a breakpoint in an Angular component or service, start debugging in VS Code, and the brea...

Checklists for software errors, setup, and tool workflows.

Latest checklists

Fix Git 'index.lock' File Exists Error in IntelliJ

Chrome Startup Crash on Windows 11: Fixes That Work

Fix Git SSL Certificate Problem on macOS: Unable to Get Local Issuer

How to Recover from a Detached HEAD in Git After a Rebase

Nginx Upstream Connection Refused: Diagnosis and Fixes

Fix Angular Breakpoints Not Hit in VS Code

`Topic paths`

`Quick titles`