Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

You run git push and get: ! [rejected] main -> main (non-fast-forward)

Fix Python Permission Denied on pip install --no-cache-dir
You try to install a Python package with pip install --no-cache-dir somepackage and ...

Fix Cloudflare Wildcard Subdomain Not Working
If you've set up a wildcard DNS record in Cloudflare (e.g., *.example.com) but s...

Fixing 'git rebase index.lock file exists' Error
When running git rebase, you may see an error like fatal: Unable to create ...

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

Fixing Common pnpm Workspace Setup Issues
When setting up a pnpm workspace, you might see errors like ERR_PNPM_WORKSPACE_PACKAGE_NOT_...