graph-retrieval

# Graph Retrieval Skill ## Purpose Expose graph-based retrieval as a tool capability without breaking the existing RepoBrain execution chain. ## Tool - `query_graph(query, max_hops=2, workspace='.')` ## Behavior - Reads normalized graph store files under `.repobrain/graph/`. - Builds a query-relevant subgraph. - Returns LLM-friendly semantic triples plus replayable evidence metadata. ## Output Contract ```json { "summary": "...", "triples": [["subject", "predicate", "object"]], "evidence": [{"retrieval_id": "...", "tool_name": "..."}], "nodes": [...], "edges": [...] } ``` ## Design Notes - Keeps tool-driven and replayable architecture. - Does not bypass pipeline. - Intended for structure/dependency questions and context enrichment.