Personaxis + persona.md

AI persona infrastructure: the Personaxis registry/deployment platform plus persona.md, the open standard and CLI for defining AI agent personas.

Personaxis groups two parts of the same project: the hosted registry/deployment platform and persona.md, the open specification and CLI for defining who an AI agent is.

persona.md is a declarative Markdown/YAML format for agent personhood across identity, character, personality, cognition, affect, values, self-regulation, memory, metacognition, and presentation.