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YC F26 · Active

Mirrors

Give AI agents the right context at the right moment

Class
Fall 2026
Status
Active
Industry
B2B
Location
San Francisco, CA, USA
Team size
2

Website

https://www.mirrors.dev

About

Production agents handle many different customer workflows. Currently, when one handles a situation badly, an engineer reads the trace and patches the prompt. The next situation needs another exception. Soon, improving the agent becomes a recurring engineering job, and the prompt keeps growing. Mirrors finds patterns in past runs. Engineers review guidance for a specific situation and preview where it would apply. Mirrors then delivers that guidance while the agent works, inside the team’s existing setup. The team can check whether the change improved the outcome. We’re building Mirrors for engineering teams running customer-facing agents across varied workflows, so they can improve behavior without hardcoding every lesson in the global prompt.