Try Pieces, it is fo free. Its has a coding assistant (you can choose between different models) that you can feed with websites, files and snippets. The assistant is specialized for coding and deliveres really good results for me and when given additional context through files or website content it follows the instructions astonishingly well.

It is much more than just the coding assistant though, it is a tool to quick capture code snippets and leverage them. It also has integrations for the browser, vs code, jetbrains and obsidian.

Can only recommend it!