Quinn from Sourcegraph here. Thanks for posting this! It was actually a quick hack project I built on our API for fun last night. It basically uses sourceboxes (<a href="https://sourcegraph.com/blog/sourceboxes-a-better-way-to-embed-code-snippets" rel="nofollow">https://sourcegraph.com/blog/sourceboxes-a-better-way-to-emb...</a>), which are like Gists but with jump-to-def and doc tooltips, to display the function and type signatures for godoc definitions.<p>It's pretty rough, but we'd love to hear feedback. And if anyone else wants to build similar tools using sourceboxes or our API, go for it and reach out if I can be helpful (sqs@sourcegraph.com).<p>BTW, thanks to the awesome @kisielk (gorilla maintainer, etc.) for the gosrc.org domain. You can just go to gosrc.org/github.com/some/pkg to use gosrc.org for any package.