Claude Code in a 1 Million Line Codebase: What Works, What Doesn't

My Courses are here: https://edwarddonner.com/curriculum/ The 2nd one (AI Coder) is on all things Claude Code & Coding Agents.. I hear this a lot: "I get that Claude Code works great on demos and new builds. But can you actually be successful with Claude Code on a massive, enterprise-scale codebase?" This is my answer! And we put it into practice on a 1.3M line project with 15,000 files. This is the project we'll examine: https://twenty.com/ And its repo: https://github.com/twentyhq/twenty Remember to copy & paste the .env.example files in these 2 directories to make your .env files: packages/twenty-front/ packages/twenty-server/ Take a look at the CLAUDE.md, and in particular the code quality section: https://github.com/twentyhq/twenty/bl... The 2nd and final part of this video builds the new feature:    • Claude Code in a 1 Million Line Codebase P...