[tommyengstrom]

I'm in a similar situation. I write Haskell daily and have been working with Haskell for a bunch of years.

Though I use claude code. The setup is mostly stock, though I do have a hook that feeds the output of `ghciwatch` back into claude directly after editing. I think this helps.

- I find the code quality to be so-so. It is much more into if-then-else than the style is to yolo for my liking. - I don't rely on it for making architectural decisions. We do discuss when I'm unsure though. - I do not use it for critical things such as data migrations. I find that the errors is makes are easy to miss, but not something I do myself. - I let it build "leaves" that are not so sensitive more freely. - If you define the tasks well with types then it works faily well. - cluade is very prone to writing tests that test nothing. Last week it wrote a test that put 3 tuples with strings in a list and checked the length of the list and that none of the strings where empty. A slight overfit on untyped languages :) - In my experience, the uplift from Opus vs Sonnet is much larger when doing Haskell than JS/Python. - It matters a lot if the project is well structured. - I think there is plenty of room to improve with better setup, even without models changing.