If your AI agent can call production systems, the contract between the agent and your capabilities is more important tha...

If your AI agent can call production systems, the contract between the agent and your capabilities is more important than the prompt.A schema‑first capability design puts that contract at the center of your architecture and lets everything else – CLIs, HTTP APIs, agent tools – project from it.What is a schema‑first capability?Take a real operation in your system:create_invoicedeploy_servicereset_user_passwordInstead of documenting this informally and wiring it directly into APIs, you define a machine‑readable schema that captures:input fields, types, and constraintsoutput structureerror variants and their shapesThis schema is authoritative across all callers: humans, microservices, and AI agents.Why do this for agents?LLMs are not type‑safe. They will:omit required fieldsinvent new onessend wrong types ("five" instead of 5)If you validate deep inside your application, you only discover problems after partial side effects. A schema‑aware runtime can:validate inputs before executionvalid...