Shared U.S. immigration-law plugin: INA (8 U.S.C. ch. 12), 8 CFR + 22 CFR, and the Foreign Affairs Manual mirrored verbatim, plus an EOIR court-rules corpus; an on-demand case-law index for the federal circuits, the Board of Immigration Appeals, and the USCIS AAO, backed by two bundled free MCP servers (CourtListener + Legal Data Hunter) and an immigration-case-law skill that routes the agent to them; and a 12-skill, venue-independent, document-producing self-help layer. Full detail in the plugin README.