Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You run docker pull and see access denied or denied: requested ac...

How to Manually Activate a Python Virtual Environment
You've created a Python virtual environment but can't get it to activate. This guide walk...

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...

Docker Build Context Canceled: Fix .dockerignore Mistakes
You're running docker build and after a long wait you see: context cance...

Recover Lost Changes After Git Detached HEAD
You've made several edits, then checked out an old commit or tag, and now Git says you're...

VS Code Git Not Detecting Changes: Step-by-Step Fix
You've edited files in VS Code, but the Source Control panel shows no changes. The git icon m...