Right now there is no documentation for Wikibase hooks on mediawiki.org. This should be fixed - each hook should be documented under https://www.mediawiki.org/wiki/Manual:Hooks/ namespace. The hooks list in Wikibase code:
- WikibaseHandleChange
- WikibaseHandleChanges
- WikibaseRepoEntityTypes
- WikibaseRepoDataTypes
- WikibaseClientOtherProjectsSidebar
- WikibaseClientDataTypes
- WikibaseClientEntityTypes
- WikibaseEntityNamespaces
- WikibaseTextForSearchIndex
- GetEntityByLinkedTitleLookup
- WikibaseContentModelMapping
- WikibaseChangeNotification
There is documentation in docs/hooks-php.md but it is much harder to locate and search it.
May be automatable (see T157757 for similar task) i.e. just running a script that would create wiki pages