# Joe's Claude Code Workflow > A comprehensive guide to using Claude Code effectively, created by Joe Hu, a product person shipping real products with AI. Learn document-first development, context window management, Plan Mode with ultrathink, manual testing practices, and PM-style debugging techniques. This guide shares practical workflows and custom slash commands for using Claude Code with Opus 4.5 to build production applications without a traditional coding background. ## Key Concepts - [Context Window Management](https://cc.hubeiqiao.com/#context-window): Understanding the 200K token limit and the "Lost in the Middle" quality degradation curve - [Document-First Development](https://cc.hubeiqiao.com/#draft-plan): Write requirements before coding, use Plan Mode to break down tasks - [Custom Slash Commands](https://cc.hubeiqiao.com/#appendix): /preflight, /investigate, /smart-compact, /ask-questions-if-underspecified ## Workflow Phases - [Draft Plan Phase](https://cc.hubeiqiao.com/#draft-plan): Raw text first, then Plan Mode with ultrathink for breakdown - [Execution Phase](https://cc.hubeiqiao.com/#execution): Start with Plan Mode, monitor context with /context, use subagents - [Test & Deploy Phase](https://cc.hubeiqiao.com/#test-and-deploy): Manual testing, /preflight command, GitHub CI workflow - [Debug Phase](https://cc.hubeiqiao.com/#debug): PM-style evidence gathering, /investigate command, document issues ## Key Principles 1. **Detailed Documentation First** - Articulate what you want before coding 2. **Context Window Management** - Quality degrades non-linearly, the last 20% is poison 3. **Manual Testing is Key** - Validate results match your requirements 4. **Stay Curious** - Ask questions, understand the logic even if you don't know the code ## Author - [Joe Hu](https://hubeiqiao.com): Product person and vibe engineer building joespeaking.com - [Follow on X/Twitter](https://x.com/hubeiqiao): @hubeiqiao ## Related Sites - [hubeiqiao.com](https://hubeiqiao.com) - Joe Hu's main personal site - [ai.hubeiqiao.com](https://ai.hubeiqiao.com) - AI-focused content hub - [joespeaking.com](https://joespeaking.com) - AI-powered speaking practice product ## Resources - [Full Markdown Version](https://cc.hubeiqiao.com/llms-full.txt): Complete article content in plain text - [Official Claude Code Documentation](https://code.claude.com/docs): Anthropic's official docs - [Lost in the Middle Paper](https://arxiv.org/abs/2307.03172): Research on context quality degradation