Patterns for Building AI Agents by Sam Bhagwat

Patterns for Building AI Agents by Sam Bhagwat

Every great AI agent is built on patterns — repeatable architectural decisions that determine whether your agent reasons well, stays on task, and scales gracefully. Patterns for Building AI Agents by Sam Bhagwat, Cofounder & CEO of Mastra.ai, distills the hard-won lessons of building real-world AI agents into a clear, practical pattern library you can apply immediately. This is the book that brings engineering discipline to AI agent development.

Bhagwat covers the essential patterns — from context management, tool use, and memory architectures to agent evaluation, error handling, and orchestration — with the clarity of someone who has built and shipped production agents at scale. Whether you're an engineer starting your first agent project or a technical lead standardizing your team's approach, this book gives you the vocabulary and the blueprints to build agents that are reliable, capable, and maintainable. Stop reinventing the wheel. Start building on patterns that work.

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