Developer productivity now hinges on the AI 'harness,' not the underlying model
A veteran developer describes how coding assistance has evolved from tab-completion to agentic coding to full harness-managed workflows over the past eighteen months. He argues that with a shared skills file and unified tooling across Cursor, Claude, and Pi, the choice of underlying AI model has become largely commoditized, and he now relies heavily on the cheaper Deepseek-v4-flash model for routine work.