James' Growth Diary

Sep 12, 2026 · Backend Development

OpenAPI Design for AI Agents: Stable Primitives, Credential Governance, and Integration Patterns

This article presents a three-layer OpenAPI architecture for AI agent platforms—credential governance, stable primitives, and evolvable management interfaces—emphasizing semantic freezing, platform-issued credentials with request signing, application tiering, and explicit integration authorization to enable third-party systems to integrate reliably without coupling to internal product changes.