Blog Posts

Official engineering blog posts from Anthropic's engineering team. 23 articles covering Claude Code, Agent architecture, Context Engineering, MCP protocol, and more.

Highlights

Agent Architecture & Design

• Building Effective Agents — Anthropic's classic guide on agent design
• Multi-Agent Research System — Orchestrating multi-agent collaboration
• Scaling Managed Agents — From prototype to production

Claude Code in Practice

• Claude Code Best Practices — Patterns for large codebases
• Claude Code Auto Mode — Two-layer defense security
• Claude Code Sandboxing — Code execution security

Context & Tools

• Effective Context Engineering — Core context management in the agent era
• Equipping Agents with Skills — Three-level progressive disclosure
• Writing Effective Tools for Agents — Tool design principles

Evaluation & Analysis

• Demystifying Evals for AI Agents — Eval framework design
• BrowseComp: Eval Awareness — Browsing capability evaluation

Advanced Engineering

• Harness Design for Long-Running Apps — Multi-agent GAN architecture
• Building a C Compiler with Parallel Claudes — Parallel agent collaboration

Startup Guide

• The Founder's Playbook — AI-native startup lifecycle