The parties

Two kinds of party, distinguished by their object — never by a verb.

PERSONA  ──┐                        a party the running SYSTEM serves
           ├──►  ACTOR  ──►  ROLE
DISCIPLINE ┘                        a party that acts on the CHANGE

A party acts as itself, or delegates to an agent, in order to perform a role. Neither branch is optional: without disciplines most of the track holds roles with no party above them; without personas there is nothing to state a capability for.

The practice enumerates neither branch. Which personas a system serves, and which disciplines act on it, are declared by each application. The practice supplies only the test that sorts them — and examples.

Page	Covers
Actors	A human or an agent, and why eligibility turns on access
Roles	Worker, Verifier, Sentinel and Decider — and the permissions each carries
Personas	Parties the running system serves
Disciplines	Parties that act on the change
Accountability	Attribution against accountability, and how delegation is bounded