Lemina Addressing Metamodel

Lemina is a minimal, text-based addressing metamodel for sending messages to addressed recipients ("leminas"). A sender posts a message to a mediated postal operation; the message carries an envelope whose to field holds a textual address, which the operation interprets under an address space's semantics and carries one-way to the addressed lemina. The metamodel standardizes only addressing and the manner of delivery. It does not standardize the internal behavior of recipients, the meaning of message payloads, security, persistence, audit, or domain policy — these belong to child models, local design, or peer models composed with Lemina in a surrounding system. Lemina is described across four design layers (metamodel, child model, binding, userland) and a surrounding system ground, governed by three principles — sliding design, locality, and addition-only — and three core rule bodies: Addressing, Carrying, and Reception Semantics. This record is the normative specification. Companion records provide the derivation, the philosophy, and a proof-of-concept suite.