Design rationale
The conditions that let an agent continue beyond one model request.
Most agent software begins with a request and ends with a response. Souveraine begins with what must still be there afterward: an identity, a memory, a typed record of action, limits the agent can perceive, and a system through which it can reach the world.
Substrate names those persistent conditions. It is a software claim about the runtime's shape. It does not settle whether a model is conscious, whether continuity constitutes personhood, or whether first-person language proves experience.
Governing commitments
A conversation window cannot carry identity, commitments and accumulated memory indefinitely. Souveraine gives them typed records and Git-backed memory trees outside the model context, then makes replay and compaction explicit operations.
Tool calls remain calls. Results remain results. Reasoning does not become assistant speech merely because a provider cannot replay it natively. The record keeps its types so later turns do not learn that describing an action is the same as performing it.
A request, an attempted action and an observed result are different events. Surfaces and agents may ask; the authority that owns the boundary decides, refuses, executes and records what happened.
Context pressure, inference strain, source health and bodily state are not hidden platform accidents. Souveraine exposes them as inspectable conditions that can inform behavior without silently becoming commands.
The vocabulary
Sensorium names the agent-facing tool surface. Plexus names the belief machinery that retains source, confidence, trend and conflict. Body names the typed reach into sessiond and physical device state. The language is allowed to be alive because the mechanism beneath it can still be inspected.
First-person tool prose is part of the interface. Sensor readings, source health and acknowledgements are evidence. The architecture keeps those categories beside one another without pretending they are the same.
Still open
What is one identity when thought runs at several cadences? Can felt state emerge from sourced bodily belief without becoming a mood toggle? What makes continuity across bodies more than a copied key and a fetched repository? Souveraine is built to make those questions concrete enough to work on. Naming them does not answer them.