AI output is not authority.
Phionyx is a deterministic governance runtime for AI-generated actions. It preserves how a decision was governed — policy, state, action, verdict, and evidence — as a signed, replayable record.
Phionyx does not make the model deterministic. It makes the governance path deterministic.
What makes it different
One inspectable record — not four separate tools.
Phionyx is a deterministic governance path for AI-generated actions. Before an agent's output becomes a real action, it passes four checks — and binds them into a single record you can replay and verify:
1 · Policy gates
Rules decide what is allowed to proceed.
2 · State transition
The change is applied in a defined, repeatable way.
3 · Calibrated abstention
When it can't back an answer, it refuses or defers instead of guessing.
4 · Replayable evidence
A signed record of what happened — re-checkable by anyone, offline.
Other tools capture part of this — a signed receipt, or an audit-and-replay log. Phionyx unifies all four in one artifact, runs on school-safe consumer apps, and governs the AI that builds Phionyx itself.
What each profile addresses
Three runtime profiles.
Each profile addresses a distinct governance challenge — not a monolith. Each does one job; together they keep AI output accountable to evidence.
The notary
Evidence Runtime
A signed, replayable record of every governed decision.
The boundary
Abstention & Boundary
Hedge, defer, or refuse — with a calibrated confidence, not a guess.
The gate
Safety Gate
Fail-closed gates between model output and action, with escalation to a human.
What changes
The difference is what happens before action.
Without Phionyx
The model's suggestion can become the system's behaviour. No deterministic record of scope, safety, approval, or replay.
With Phionyx
Every transition passes verifiable gates and produces a replayable audit envelope. The model stays probabilistic; the path is reproducible.
Verifiable artefacts
Real-world demonstrations
Applications
Safety Gate + Evidence Runtime in practice
HearthOS
A bounded-authority household assistant. The system proposes; the responsible adult decides. Every decision is recorded.
See HearthOS →Governed runtime in practice
Trace — School RPG Demo
A school-safe RPG demo built on the same governed runtime, with each turn bounded and recorded.
Open the School RPG demo →A model saying “fixed” is not evidence.
It is a claim.
Runtime evidence for agentic AI. Tool calls · agent claims · gates · audit chains · replayable runs.
See how the evidence verifies →