INCOSE-compliant requirements development with hybrid quality checking (16 deterministic + 9 semantic GtWR v4 rules), verification planning, bidirectional traceability, gap analysis against concept architecture, assumption lifecycle management (GtWR §5.3), cross-cutting notes registry, need/requirement split workflow, ConOps scenario mining, provenance scoring, and ReqIF export. 5 agents, 16 scripts, 10 commands.