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PathFinder 2e Wiki
Where do I find the 2nd Edition version of entries in the PathFinder Wikipedia?
Perhaps simply adding summary information for each addition for affected entries is enough. Though, specific differences can be added beneath each heading with a sub-header for each Edition.
Changes to the setting may best be addressed with sub-headings of the date specific changes occurred for information in an entry. This also addresses any changes occurring as the timeline advances.