Built-in skill — systematic debugging.
Injects a system-prompt section imposing the reproduce → isolate → hypothesise → fix → verify loop, and explicitly bans shotgun debugging, fixing symptoms instead of root causes, and changing more than one thing at a time.
Activates on prompts containing "debug", "fix bug", "not working", "broken",
"error", "failing", "crash" or "troubleshoot". Group :debug;
tags :debug, :fix, :troubleshoot.