Primitives

Page in progress

Full content is being written. Until then, the authoritative references are the specs in /spec/ — passport, envelope, receipt, capability, and topology each have a dedicated spec doc with rationale.

A Yutha swarm is built from four primitives:

• Passport — a verifiable agent identity. Ed25519-keyed, operator-issued, revocable.
• Envelope — a typed message between agents. Has a sender, a recipient (or role, or swarm-wide broadcast), a typed action kind, and a payload.
• Receipt — an append-only, signed record of a consequential action. Content-addressed, deterministic, replayable.
• Capability — a first-class authority token. Bounded, attenuable, revocable, cascadable. Cap checks happen at the control plane, not in agent code.

Everything else in the system is a composition of these four.