Vizier ⇄ Workhorse — one directs and grades, the other executes and commits.
Capability is symmetric; role is asymmetric. The Vizier (frontend) keeps the truth, directs, grades, never commits to main. The Workhorse (backend) executes, ships, is the sole committer. The Mastermind sanctions, vetoes, sets priorities. Truth-first: no build without the audit.