agent-development: Agent development standard answer for Claude Code Plugin

The threshold for writing Agent is not high, but actually writing a reliable one is much harder than imagined. Most people's first version of Agent follows the same routine: write the requirements into the system prompt, give it a few tools, and then expect it to do it on its own. The result is often that it is either too conservative and does nothing, or it is too aggressive and does everything wrong. You repeatedly adjust prompts, change models, and add constraints, but the effect is still not ideal. The problem isn't that you didn't work hard enough, it's that you didn't set it up correctly from the beginning. Anthropic released an agent-development Skill on Smithery, which is essentially a Claude Code