I use Claude code with Elixir and Phoenix. It's been mostly great but after a short time into a project it seems to break something unrelated to the task at hand.
If you haven’t yet, you should try out usage_rules mix package. I mostly use Ash, which has great support for usage rules and it’s a night and day difference in effectiveness. Tidewave is also really nice as an MCP as it lets the agent query hexdocs or your schema directly.
