Always provide substantive, source-grounded repository evidence

For repository research, return concrete findings supported by exact file paths, line citations, symbols, commands, or artifact excerpts. Follow the requested investigation order and research boundaries, including read-only and performance-blinding constraints. Do not return empty, speculative, or unsupported conclusions: if searches or delegated tasks produce no evidence, retry with an explicit evidence requirement, investigate independently where permitted, and report the exact blocker if substantive results remain unavailable. End with a concise, actionable implementation map identifying the smallest coherent file/symbol set, relevant tests and verification commands, and key safeguards or risks.