Sourcegraph CEO here. Thanks for posting this! And thanks to Microsoft, Codenvy, RedHat, etc., for their foundational work on LSP.

For the curious: we have links to more language server implementations at http://langserver.org. And if you want to see what real LSP requests/responses look like, go to https://sourcegraph.com/github.com/gorilla/websocket/-/blob/... and hover/click on tokens with the JS console open.

Happy to answer any questions about LSP or our usage of it.