Agent Skills: research-investigate

Investigate a complex, multi-faceted question across multiple source domains and produce a persisted, evidence-rich research document. Selects an investigation methodology by question shape (domain / market / technical / codebase / general), decomposes the question into sub-questions, dispatches the six read-only research children in parallel waves across the hide-the-intent boundary, synthesizes findings once into the methodology's section structure, and persists the document to the thoughts research directory with citations, GitHub permalinks, and honest gap-marking. Mode-aware: interactive confirms the investigation plan and reviews sections at checkpoints; autonomous runs to completion and returns the document path. Emits SCOPE_TOO_LARGE with suggested sub-investigations when a question is too broad for a single coherent document. The workhorse for 'reconstruct everything we know about X', 'industry analysis of Y', 'how should we architect Z'.