feat(graph): US-GF-03 query_graph NL scoped subgraph#84
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Add MCP query_graph and CLI graph-query / query --kind subgraph: seed retrieval → BFS/path expand → token-budget trim with provenance labels on every edge (REL-042 / FR-GF-05 / FR-GF-06).
Strengthen US-GF-03 MCP assertions (seeds, provenance, budget, empty question), create persona fixture so agent_focus/diary pass, register schema checks, and add scripts/mcp-smoke-tools.py with honest skip labels.
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Summary
query_graph(question, token_budget?, max_depth?)— keyword seed retrieval → bounded BFS expand (or shortest path for "what connects A to B?") → token-budget trim → TOON via existing MCP envelope. Every edge carriesconfidence_label(EXTRACTED/INFERRED/AMBIGUOUS).leankg graph-query "<question>"andleankg query --kind subgraph(existing--kind name|type|…unchanged).src/graph/nl_query.rswith the real Graphify-style scoped subgraph pipeline; marks tracker rows DONE.Test plan
cargo test --release --lib(668 passed)cargo test --release --lib nl_query(5 passed)cargo test --release --test mcp_tools_redundancy_tests query_graphcargo test --release --test redundant_tools_matrixcargo clippy --release --lib -- -D warningsleankg graph-query --helpleankg graph-query "what connects X to Y?"Made with Cursor