Self-service · No signup required
Run the governance gate
This is the same ONLY Lang verifier behind the 89 DGV test cards — compiled to WebAssembly and running in your browser. Write a script, set the field values, and press Run. The gate returns ALLOW, DENY, or ESCALATE with a residual, healed indices, and a receipt.
No data leaves your machine. The verifier runs entirely client-side. After a few runs, you can request the full verifier bundle to run all 89 test cards locally.
These are the initial values the governance gate evaluates. The WASM verifier runs entirely in your browser — no data leaves your machine.
Preset scenarios
The ONLY Lang verifier is loading in your browser…
This is the same verifier behind the DGV test cards. No signup required.
What is ONLY Lang?
ONLY Lang is Only Institute's equilibrium DSL for verifiable policy. A governance constraint in ONLY Lang is not a document — it is a script that runs against the system and produces a receipt. Read the research brief.
What is DGV?
DGV (Deterministic & Governance Verified) is the verification suite — 89 test cards across 9 governance layers that test whether an AI system's governance gate actually works. Explore the project.
Want this in production?
PrimeSwarm puts this gate in front of your AI execution path — with HITL escalation, durable memory, and SIEM integration. See the offer sheet.
ONLY Lang command reference
harmony(tolerance)Set the equilibrium tolerance. Smaller = stricter.evolve(index)Evolve a field index toward equilibrium.corrupt(index)Corrupt a field index to test detection.residual()Check the current equilibrium residual.report()Generate a text receipt of the evaluation.assert_bounds(min, max, idx)Assert field[idx] is within [min, max].budget_limit(value)Set a budget limit. Gate denies if exceeded.escalate(reason)Force escalation to human review.if_broken{ ... }Execute inner commands if equilibrium is broken.bind(name, index)Bind a name to a field index for provenance.