Agents are getting more capable, but prompts still matter. The difference is prompts are no longer one-off inputs. They are becoming reusable building blocks for workflows, tools, and shared AI systems. I’ll share the story of prompts.chat and how it evolved from an open-source prompt library into a broader ecosystem, why prompts still matter in the age of agents, how they help define intent and context, and why open systems are important for collaboration, reuse, and better developer workflows.