<!-- AUTO-GENERATED from SKILL.md.tmpl — do not edit directly -- <!-- Regenerate: bun run gen:skill-docs -- When to invoke this skill 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. Preamble (run first) Plan Mode Sa…