Jev 作者：Agent 框架将全面转向 code-first
Jev 作者 jdegoes 认为，靠 YAML/JSON 配置的 agent 框架已过时，未来必须用通用编程语言写 agent loop，一年内见分晓。
What does the rapid success of Jev say about Agent Frameworks?? Jev is a fast and cheap classifier: a type of model that outputs NOT text, but a single number, which shows not only massive cost and latency advantages, but also accuracy advantages on the subset of tasks that it can be used for (bye-bye auto-regression!). The success of Jev indicates that historical and popular 'agent frameworks' that rely on YAML or JSON objects to specify certain parameters, ranging from model choice to role prompt and tools, are increasingly obsolete. The future brings with it a diversity of specialized models that excel at specific parts of agentic work. A diversity of specialized models implies specialization in the architecture of agents, which requires flexibility in the 'agent loop'--the harness that leverages models to drive them toward success. There is no way to encode agents as YAML or JSON properties. A custom agent or harness must necessarily be written in a general-purpose programming language, which has boundless capacity for specialization and customization at every layer. Every good agent framework is going to evolve to be code-first; the rest will be gone within a year.