triage-bug

Investigate a bug or unexpected behavior by tracing the root cause through the codebase, then produce a TDD-based fix plan. Use this whenever a user reports a bug, crash, or wrong behavior — even if they say "something is off", "this broke", "not working", "why is X happening", "investigate this", or paste an error message. Also use when the user asks to trace a regression, understand a failure, or plan a fix. This is a hands-off deep-dive that ends with a tracked issue and a concrete fix plan.