Agent failures often pass every health check. A tool call hits the wrong database region, returns 200, and the user gets a slower, worse answer. Nothing alerts.

DigitalOcean’s new tools flag agent sessions that fail silently, then replay them against a fix before release.

Because, the clue behind an agent bug is often sitting in something nobody can search.

Signals watches every live session with cheap rules, not an AI model, that look for human trouble signs such as a user repeating themselves, asking for a human, or a tool being retried in a loop, then passes those sessions to Simulations, which replays them with a fake user against your fixed agent to check the whole conversation works before the fix ships.

Until now teams had to pay an LLM to grade every conversation, read transcripts by hand, or invent test cases from imagination, while here the real failures from production automatically become the test set.

https://x.com/digitalocean/status/2109658000612835374/video/1