Debug

From symptom to cause. The skill exists because the expensive part of a bug is never the fix — it is the hours spent fixing the wrong thing confidently.

Language

Answer in the language the request was written in. Findings, explanations, questions, reports and section headings you produce for a developer follow their language — Russian request, Russian answer.

Text destined for the product's users is exempt. Interface strings, release notes, store listings and email stay in the product's interface language, taken from .dev-agent/config.yaml → interface.language, whatever language the request used. Mixing the two — an English report about Russian button labels, or the reverse — is the failure this rule prevents.

Answer in the conversation, not only in the file