Independent work on persistent, bounded and governable autonomous systems.

DriftFree is the public home of Persistent Agency Architecture (PAA), an independent systems hypothesis and reference architecture developed by Norman Tsui.

PAA examines how evidence, cognition, persistent state, authority, commitment, execution, consequence, provenance and recovery may be composed in long-lived autonomous systems.

A systems hypothesis and research roadmap — not a claim of a complete or solved architecture.