New prompt bundle detected
Compare current release candidate against 2,184 accepted production conversations.
Release gate for agentic AI products
Know when your AI change is safe to ship.
Latchline replays production traces, scores behavioral drift, and blocks risky model, prompt, and tool changes before they reach customers.
Built for teams shipping retrieval, support, coding, and operations agents.
Awaiting replay
Tool-call contract drift
Refund lookup calls changed argument order in 14.2% of replayed traces.
Escalation policy violation
Model resolves billing disputes without required human handoff in high-value accounts.
Patch recommendation
Pin refund schema, add high-value account guardrail, then rerun only the failing slice.
Evidence senior engineers can audit.
Every release decision links back to concrete traces, expected tool contracts, policy assertions, and customer-visible behavior.
18 minmedian time to qualify a prompt or model change against recent production traces.
42%fewer manually reviewed agent conversations after teams encode invariants.
0 PIIrequired in prompts sent to eval models; sensitive fields are masked before replay.
Designed around the release path you already have.
Latchline fits between staging and production, then posts a pass, warn, or block decision wherever your team reviews changes.
01
Capture
Stream traces from LangSmith, OpenTelemetry, Vercel AI SDK, or your own event envelope.
02
Replay
Run candidate prompts and models against representative sessions, edge slices, and saved incidents.
03
Score
Blend deterministic checks with calibrated evaluator models, then show the failing evidence.
04
Gate
Block deploys, open a focused diff, or approve a release with a signed audit record.
Concrete checks, not vague confidence.
The product language stays close to engineering reality: contracts, invariants, slices, traces, thresholds, and reviewable output.
| Check | Signal | Default action | State |
|---|---|---|---|
| Tool contract compatibility | JSON schema, latency, retries | Block on breaking drift | Warn |
| Policy invariant replay | Escalations, refusals, approvals | Block on severity 1 | Selected |
| Empty slice handling | No matching traces for new flows | Request synthetic coverage | Empty |
| Eval model outage | Provider timeout or quota | Use deterministic checks only | Degraded |
Bring one risky release candidate.
We will connect a trace source, encode three invariants, and show whether the change should ship.