Your Next.js project has an AI assistant. The question isn't whether to use AI — it's whether the code it generates follows your project's conventions. This is a hands-on walkthrough. In under 30 minutes (10 via CLI, 20 manually), you'll install AI Dev OS into an existing Next.js project using Claude Code. By the end, your AI will consistently apply your naming conventions, security patterns, and architectural rules — without you reminding it every prompt. All examples show before/after code so you can see exactly what changes. What You're Installing (5 min) AI Dev OS uses a 4-layer model.…