I would like to check out your implementation in the neovim plugin. Do you have a direct link? As for myself, I was always more into doing git-related tasks directly in the terminal without relying on plugins or external tools, therefore bash scripting naturally aligned with that approach for me, even though I also do the editing in neovim...
Good point about making the AI more aware of conventional commits. In fact, sometimes the AI tends to follow a more conventional commit style, sometimes not. But there is an option to add specific instructions, like adhering to conventional commits or any custom guidline, but anyway, its still in progress ;-) And I usually manually the generated commit messages to fit in a specific context.
One of the challenges I've noticed is that the AI sometimes struggles to distinguish between formatting and actual code changes. So, to address this, I usually also provide additional instructions or make manual adjustments.