I created a github issue for this

https://github.com/haskell/haddock/issues/452

Still e.g. `base` does since annotations manually. In fact, every package I contributed lately does them manually :(

- Oleg G

On 02 Oct 2015, at 19:32, Phil Ruffwind <rf@rufflewind.com> wrote:

Since Haddock now supports the '@since' annotation, it might be better
to implement it in Haddock rather than have everyone do it manually.

https://github.com/haskell/haddock/issues/26