Devin on Mark Holton - Hands on Software Architecthttps://holtonma.github.io/tags/devin/Recent content in Devin on Mark Holton - Hands on Software ArchitectHugo -- 0.147.9en-usSun, 27 Sep 2026 14:09:00 -0400Devin, Kimi K3, and the RL Flywheel Behind a Coding Agenthttps://holtonma.github.io/posts/devin_kimi_k3_and_the_rl_flywheel/Sun, 27 Sep 2026 14:09:00 -0400https://holtonma.github.io/posts/devin_kimi_k3_and_the_rl_flywheel/I explore how Cognition used coding-focused RL to build SWE-2 from Moonshot’s open-weight Kimi K3, where Devin’s harness fits in, and how its cost compares with Claude Code.