-- A seat's protocol lives in the store, not in the binary (novox/hq ADR 0129, ADR 0132, design 33 §2).
--
-- ADR 0122 moved the seat set into this table with name, scope, delivers and decision, and the
-- protocol — what a role accepts, emits and serves — stayed compiled into the control plane and was
-- merged in as a row was read. Discovery that reads a binary disagrees with the mesh the moment the
-- two are on different versions, and a tool without a schema is not something an agent can call. So
-- the three halves become columns: accepts and emits as lists of verbs, serves as the verbs in full
-- ({name, description, input, output}). Seeded from the compiled defaults where a row has none,
-- additively thereafter (a verb a release adds joins the row; nothing is taken away).
alter table seat add column accepts jsonb not null default '[]'::jsonb;
alter table seat add column emits   jsonb not null default '[]'::jsonb;
alter table seat add column serves  jsonb not null default '[]'::jsonb;