[3.P] The Summoner's Handbook: A Guide to the Pathfinder Summoner

[Cieyrin]

Question: I read over the Summoner class in APG, but I can't for the life of me find anywhere that says the Eidolon is proficient with Shields. Also, I can't find anywhere in the APG talking about item slots with Eidolons, or how the Eidolon and the Summoner both use the Summoner's item slots.

Where are these actually stated?

The Sharing Items bit is part of the Link special ability of the Eidolon.

As for the Proficiencies, since Eidolons don't come with armor equipped, they aren't proficient with its use and by extension with shields, as per the Outsider type.