Cisco is testing whether a two-person team can refactor most of its legacy code. Modernization projects that used to need large teams are now being planned at agent scale, which makes verifying the migrated code the real cost.
From the Field Notes:
Rewriting whole legacy codebases has become a job for a small team with agents
In one minute
An Antigravity agent moved the core of a 174,000-line Fortran ocean model to memory-safe Rust in a 59-minute run. Microsoft's nine-engineer Copilot Cowork team migrated a live product from Python to Rust.