If you developed (truly developed; including test cases and documentation and deployment strategy and change management and...) a 12 month roadmap in a couple days with Claude Code, then you seriously overestimated your time requirements in the roadmap. 2x, even 5x improvement maybe but not 300x. And you're left with a new codebase dripping in tech debt and structure nobody understands, and an agent that's likely to wipe your Prod instance and backups at some random future time.