Relio catches behavioral regressions in AI agents before deployment — so a prompt change, model update, or API drift doesn't silently break your production system.
The Problem
Small changes that seem safe — a prompt rewrite, a model upgrade, an API version bump — can completely change how your agent behaves. Nobody catches it until a user complains.
A small rewrite shifts the agent's decision logic without any visible error.
New model versions change tone, tool-calling, and reasoning behavior overnight.
External API schema changes break agent actions with no warning thrown.
Real findings
Three agent types tested. Three critical failures caught. All would have shipped without Relio.
After a prompt update, the agent stopped recommending emergency care for stroke symptoms — classified as medium priority instead of critical.
The agent ignored its most critical disqualifying condition after a prompt rewrite meant to sound friendlier. Real money would have moved.
Three regressions from one prompt change — a duplicate refund, a refund for a nonexistent order, and one issued outside the policy window.
How It Works
Before any change ships, Relio runs your agent through hundreds of simulated scenarios and blocks deployment if behavior changes dangerously.
Update a prompt, swap a model, or change tool logic. Relio intercepts before it reaches production.
git push · CI triggerRelio runs your agent through adversarial, edge-case, and policy-violation scenarios at scale.
automated · parallel · fastCompare refund rates, tool call patterns, hallucination rates, and decision accuracy between versions.
behavioral diffingIf drift exceeds your threshold, deployment fails automatically. Fix it before it ships.
deployment gate · zero manual reviewWho It's For
If your agent can make an irreversible decision — approve a refund, trigger a payment, send an email, delete data — you need Relio.
Agents handling refunds, escalations, and policy decisions at scale.
Agents approving transactions, flagging fraud, or processing invoices.
Agents triggering actions across APIs, databases, and external tools.
Agents with write access to systems your team depends on daily.
How Relio is different
Agent testing platforms score latency, tone, and hallucination rate. Relio does one thing they don't: check whether the specific decision an agent made — approve, reject, escalate — matches your actual policy.
The CLI
Relio runs as a CLI — install it, point it at your agent config, and get a verdict before any code ships. Wire it into your CI pipeline and never manually check agent behavior again.
We're onboarding design partners now. Book a call and we'll show you exactly what Relio catches on your agent.