Merge pull request anthropics#122 from anthropics/barryz/agent-cookbook

cookbook for 'Building Effective Agents'

Author: ItsBarryZ

patterns/agents/README.md

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+# Building Effective Agents Cookbook
+
+Reference implementation for [Building Effective Agents](https://anthropic.com/research/building-effective-agents) by Erik Schluntz and Barry Zhang.
+
+This repository contains example minimal implementations of common agent workflows discussed in the blog:
+
+- Basic Building Blocks
+  - Prompt Chaining
+  - Routing
+  - Multi-LLM Parallelization
+- Advanced Workflows
+  - Orchestrator-Subagents
+  - Evaluator-Optimizer
+
+## Getting Started
+See the Jupyter notebooks for detailed examples:
+
+- [Basic Workflows](basic_workflows.ipynb)
+- [Evaluator-Optimizer Workflow](evaluator_optimizer.ipynb) 
+- [Orchestrator-Workers Workflow](orchestrator_workers.ipynb)