Here’s how I use Claude Code, the ultimate AI coding tool, to implement new features in an existing complex codebase with many users. This is not a vibe coding tutorial building throwaway MVPs.
This AI coding guide is for software developers who want to improve their daily AI coding workflows, maintain a clean production-grade codebase, and reduce bugs introduced by AI.
Youtube walkthrough: https://www.youtube.com/watch?v=SDiDkK0r-9c
Blog post: https://sabrinaramonov.substack.com/p/ultimate-ai-coding-guide-claude-code
I walk through my CLAUDE.md file containing AI coding rules, then implement a real feature from scratch, following a structured process.
Reality check:
In 2025, there is no AI tool that performs at a senior eng level.
You need to be hands-on involved, push back on AI plans, stop it from going down the wrong rabbit hole, question the code, and test extensively.