Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

When you see the error fatal: Unable to create 'path/.git/index.lock': File exists....

Node.js Heap Out of Memory in Production: Practical Fixes
You're running a Node.js application in production when it crashes with FATAL ERROR: In...

Increase Node.js Memory Limit for npm Scripts
When running npm scripts that handle large files, complex builds, or memory-intensive operations,...

Docker Compose Env File Not Being Read: Fixes
You set up a .env file for your Docker Compose project, but variables aren't bei...

Fix Windows Update Error 0x80070002
Windows Update error 0x80070002 usually appears when the update process can't find a required...

How to Resolve Git Merge Conflicts on the Same Line
You run git merge and get a conflict marker on a single line. The file shows both ve...