Give every connection a budget.
Scoped keys, daily request and model-call limits, expiration and revocation. Each client gets its own usage history.
FAST DECISIONS FOR APPS & AGENTS DEVELOPER PREVIEW · 0.2
Fast decisions.
Full control.
Let your reasoning model think big.
Give the small decisions an engine of their own.
System One brings bounded AI evaluations to your apps and agents. Connect through HTTP or MCP. Configure, test and track everything in one studio.
DECISION PIPELINE 01 / 03
Your agent or appPlan · reason · act
CALLERbounded question
System OneEVALUATE · VALIDATE · METER
one focused evaluation
JevVercel AI Gateway
MODELRETURN
{ "choice": "eligible", "escalate": false }Illustrative response · caller keeps authorityHTTP Application APIMCP Agent toolsSTUDIO Runtime controlsUSAGE Visible receipts
SMALL SERVICES. CLEAR CONTRACTS.
Offload the question.
Keep the judgment.
Use fast evaluation where the input and possible outcomes are known. Keep planning, ambiguous decisions and final actions with your application or reasoning model.
01↗
FINITE EVALUATION
Decide
Ask a small, specific question over evidence. Get a boolean probability, a finite choice or a rubric score.
POST /v1/decide02↗
SIGNAL TRIAGE
Logs
Give routine events a fast first pass. Keep errors, uncertainty and every original record available for deeper analysis.
POST /v1/logs03↗
TAXONOMY ROUTING
Tree
Navigate a taxonomy with bounded evaluations. Return a known identifier or ask the caller to escalate.
POST /v1/tree04↗
NARRATIVE TIMING
Dialogue
Choose an eligible recorded line, stay silent or fall back. Respect completed cues, spacing and the current scene.
POST /v1/dialogueYOUR ENGINE ROOM
A studio built for control.
Test a service. Inspect the result. See which client made the call. Tune the provider, limits and runtime without losing the thread.
Actual studio interface. Screenshot uses a test fixture; values are demonstration data.
BUILT WITH BOUNDARIES
Useful speed.
Visible tradeoffs.
Cost and latency depend on your workload. System One gives you the controls and receipts to measure whether offloading helps.
How to measure it ↗Make uncertainty explicit.
Bounded outputs, validation and deterministic fallbacks. A model probability is evidence to evaluate, not permission to act.
Own your engine.
Run the studio locally with private provider configuration. Connect to a local or hosted engine using a scoped credential.
FIRST REFERENCE IMPLEMENTATION
A narrator that knows
when to stay silent.
The Infinite Parable uses System One as an optional dialogue adviser: selecting among eligible recorded cues, respecting played lines and keeping the deterministic game engine in control.
Explore the dialogue pattern ↗PLAYER ENTERS ROOM
This cue already played SKIP
A new eligible reaction EVALUATE
Let the moment breathe SILENCE
Illustrative selection flow · no generated speechBuild a faster first pass.
Bring your provider key. Keep your application in charge.
Get started with System One ↗