Inside Mercury’s six-month journey building with AI agents

This past March, Mercury held an internal hackathon and Matt Russell knew exactly what he wanted to work on. Russell, a staff engineer at the seven-year-old financial technology company, was aware that coding agents were advancing rapidly and he wanted to see what they could do for Mercury. He and his hackathon team created a tool that allowed them to assign issues in Linear to third-party agents, which would return a pull request for engineers to review like any other PR. Almost immediately the