Where production agents
become legible.

— In production at

Hectare Sundial LOAM Quilt Maris Northbound

— An operating surface

Three windows onto the loop. One pane of glass.

Cairn doesn't replace your stack. It sits next to it, listening — so the parts of your agent that used to live in screenshots and Slack threads finally have a home.

Rewind any run, span by span.

Every model call, every tool, every retry — preserved long enough to debug an incident that happened yesterday or four weeks ago. Open the run, scrub the timeline, find the line.

→ /traces

Block bad prompts on the way in.

Write evals once. Run them as a deploy step, on every PR, on every nightly. Catch the regression in CI — not in a customer's inbox at 4pm on Friday.

→ /evaluations

Hear the loop before it shouts.

Quiet alerting on the metrics that actually matter — success rate, p95 latency, dollar-per-run — routed to the channels your team already lives in. No new dashboard to remember.

→ /observability

"The first week we wired Cairn up, we found a silent regression that had been costing about forty dollars a day. The second week we stopped finding things like that — because they couldn't ship anymore."

Daniela Park · Lead ML Engineer, Hectare

Mark the path. Then walk it.

The first hundred thousand spans every month are on us. No card, no sales call — just a quiet workspace and your noisiest agent.

Open A Workspace Read The Docs