thank you @yinkaenoch, great contribution!
hopefully we will see an up-to-date LSP (Language Server Protocol) implementation for Sophia in the foreseeable future. @ybin64 already did great work in that direction and is hopefully able to continue his work at some point in the future.
you can check out his initial work here: Aesophia-vscode, a Sophia VSCode extension with basic LSP implementation
you would be able to extend your existing Vim extension and use the LSP server implementation to enable other features like auto-complete or go-to.
but this is definitely a great start! I am not an active Vim user, so can’t give concrete feedback to the extension.