Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You start a Docker container, but it exits immediately. This is a common issue on Linux. The cont...

You run npm run build and get an error like Error: Missing required environmen...

Docker Desktop Engine Not Responding: Practical Fixes
You click Start in Docker Desktop, the whale icon spins, but nothing happens — o...

Fix 'Permission Denied' in VS Code Terminal on Mac
You're working in VS Code on a Mac, and when you try to run a command in the integrated termi...

Fix Docker Compose Environment Variable Substitution Failed
When running docker compose up, you might see errors like failed to resolve co...

Fix Python Memory Errors When Processing Large Files
If you've seen MemoryError while trying to read or process a file that's lar...