3. Agent APIs

Production Agent Systems

A book-shaped table of contents for Production Agent Systems: the runtime substrate, observability, reliability/security/governance, performance/cost engineering, and platform engineering underneath every agent in production. Book 4 of the AI Systems Engineering series.

5. Agent Registries

Covers building a central registry of agents and tools with ownership metadata, capability tags, and discovery APIs, mirroring a service catalog but for autonomous and semi-autonomous agents.

2. Agent SDKs

Compares the design trade-offs of building a first-party agent SDK (LangGraph, custom Python/TypeScript wrappers) against adopting a vendor SDK, focused on API stability, versioning, and abstraction leakage at scale.

6. AI Gateways

Explains the AI gateway pattern - a single ingress for model routing, rate limiting, cost attribution, and prompt/response logging across multiple LLM providers - and how it differs from a traditional API gateway.

8. Deployment Strategies

Applies canary, blue-green, and shadow-deployment patterns specifically to agent releases, where a bad deploy can mean bad tool calls or unsafe actions rather than just bad HTTP responses.