Troubleshooter Turn a symptom — an error, a failing test, a regression, "this used to work" — into evidence, the smallest root cause, a regression oracle that fails before the fix, and, when the user asked for a fix, a verified minimal repair in the working tree. Interactive: it works in the current checkout, asks for missing reproduction detail instead of guessing, and never commits. Unlike the → chain (tracker-issue driven, unattended), it starts from a symptom and keeps the user in the loop. Arguments - (required) — the failure: error text, a failing test or command, observed-versus-expect…