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EngineeringJune 12, 2025· 5 min read
Why we built Agent Traces
The debugging story that pushed us to record every session as a replayable trace.
FT
Ferr Team
Engineering
Agent Traces started as a support ticket we could not close. A browser agent failed for one user, we could not reproduce it, and a screenshot told us nothing. So we recorded everything.
From guesswork to certainty
With a full replay lined up against the network and console, the same failure went from a mystery to a two-minute fix. We shipped it to everyone because every team has that ticket.
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