Systematic debugging with root cause investigation. Four phases: investigate, analyze, hypothesize, implement. Iron Law: no fixes without root cause. Use when asked to "debug this", "fix this bug", "why is this broken", "investigate this error", or "root cause analysis". Proactively invoke this skill (do NOT debug directly) when the user reports errors, 500 errors, stack traces, unexpected behavior, "it was working yesterday", or is troubleshooting why something stopped working. (gstack)
$npx -y skills add thanh-abaii/gstack-windows-port --skill gstack-investigateInstalls into the current project.
Run `npx skills use "https://github.com/thanh-abaii/gstack-windows-port" --skill "thanh-abaii/gstack-windows-port/gstack-investigate"` 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/thanh-abaii/gstack-windows-port" that are relevant to the current task. Run `npx skills add "https://github.com/thanh-abaii/gstack-windows-port"` and select the relevant skills, then follow their instructions.