Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

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

When you run git clone over HTTPS and see an error like Failed to connect to g...

Fix VSCode Breakpoints Not Hitting in TypeScript
You set a breakpoint in a TypeScript file, run the debugger, and execution never pauses. This is ...

Fix DNS Probe Finished NXDOMAIN: Chrome Flags Reset Guide
When you see DNS_PROBE_FINISHED_NXDOMAIN in Chrome, it usually means the browser...

Fix 'Python Command Not Found' in Git Bash on Windows
When running Python in Git Bash on Windows, you may see bash: python: command not found

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...