What this Claude developer guide covers
快速入门
从零开始学习 Claude Code，通过详细的安装指南和基础教程，快速高效地使用 AI 辅助编程工具。
核心机制
深入了解 Claude 的内部工作原理，包括上下文管理、代理系统、性能优化和高效使用的高级概念。
最佳实践
掌握真实世界的开发工作流程、 调试技术和高级配置。通过正确的 CLAUDE.md 设置和优化提高生产力。
What is Claude AI Dev?
Claude AI Dev is an unofficial community guide for Claude, Claude Code, and the Claude API. It turns official documentation and tested development patterns into practical installation guides, model selection advice, agent workflows, and migration checklists. The site is not affiliated with Anthropic; use Anthropic's official documentation for account, billing, policy, and API support.
Which Claude model should you use?
Start with Claude Opus 5.5 for complex coding and knowledge work. Opus 5.5 has a 1M-token context window, 128K maximum output, adaptive thinking, and a default `medium` effort. Sonnet 5.5 is the faster $2/$10-per-million-token option for everyday work, Haiku 4.5 is designed for high-volume processing, and Fable 5.1 is the escalation path for difficult long-horizon reasoning.
| Need | Recommended starting point | Why |
|---|---|---|
| Complex coding and long sessions | Claude Opus 5.5 | Long context, agentic coding, and knowledge work |
| Hardest research or reasoning | Claude Fable 5.1 | Deeper reasoning and long-horizon agent work |
| Fast everyday requests | Claude Sonnet 5.5 | Lower latency and lower token price |
| High-volume classification | Claude Haiku 4.5 | Fastest current Claude tier |
What can Claude Code do?
Claude Code is an agentic programming tool that works in your terminal and understands a codebase. A useful workflow is to give it a bounded goal, let it inspect the repository, review its plan, run tests, and verify the resulting diff. The guide covers CLAUDE.md instructions, context management, agents, MCP servers, debugging, performance, and safe tool use.
Claude AI Developer Guide FAQ
Is Claude AI Dev official?
No. This is a community-maintained resource. The About page explains the site's scope and the Contact page provides feedback and business contact details.
Is Claude down right now?
Check the official Claude status page first. It reports the health of Claude.ai, the Claude API, Claude Code, Cowork, and other components. Our Claude Status guide explains how to distinguish a platform incident from a local account, browser, or network issue.
Where should developers start?
Start with the Claude Code introduction, then read the model selection guide and the Opus 5.5 migration guide if you are upgrading an API integration.
Last reviewed: September 30, 2026 · Maintained by Claude Dev
Official sources
Latest Blog Posts
Discover the latest insights, tutorials, and updates about Claude AI development