The Vigilance Committee, formally The Committee for Vigilance in the Preservation of the True Providentialist Religion, is a Providentialist intelligence agency committed to upholding Common Law in the Commonwealth and beyond. It has been implicated in many plots and assassinations, including the Smythist coup in Tairendia. It is not a part of the Estates-General. It has been known to cooperate with the Estates-General, for instance during the Great Mutiny, but it is also believed to interfere in the politics of the Estates-General in contravention of the Estates' constitution and bylaws.
They and the lord, they got an understanding - they're on a mission from Providence.