We want to declare the `wikibase.entityPage.entityLoaded`, `wikibase.statement.saved` and `wikibase.statement.removed` hooks as stable interfaces. We could do this in the same announcement as {T169770}, but I feel like that should focus more on the deprecation and migration path of `wbEntity`.
We //might// also want to amend the Stable Interface Policy to clarify that adding arguments to a hook is not a breaking change. (I have to admit, I don’t remember what the PM / Engineering Time decision on this was – were we going to do this or not?)
~~(Tangential: Perhaps we should rename the `wikibase.statement.*` hooks to `wikibase.entityPage.statement.*`, for consistency with `entityLoaded`? Now would be the time to do it, of course – //before// it’s declared stable :) )~~ After a short IRL discussion, the decision was to not do this, since the code that fires the hook has no idea that it’s on an entity page.