Use when something is broken — a failing test, panic, stack trace, error log, or wrong behavior whose cause isn't obvious. Reproduce it, form a hypothesis, PROVE the cause before changing code, then make the minimal root-cause fix and guard it with a test. For deep cases, hand off to the debugger subagent.
$npx -y skills add dshakes/compass --skill systematic-debuggingInstalls into the current project.
Run `npx skills use "https://github.com/dshakes/compass" --skill "dshakes/compass/systematic-debugging"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/dshakes/compass" that are relevant to the current task. Run `npx skills add "https://github.com/dshakes/compass"` and select the relevant skills, then follow their instructions.