By default, internal packages are not visible when running godoc. This can only be achieved by adding ?m=all to the url; for example: http://localhost:6060/pkg/?m=all.

Depending on how you use comments, it can be helpful to also highlight TODOs.

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$ godoc -http=:6060 -notes="BUG|TODO"
$ xdg-open http://localhost:6060/pkg/?m=all