There are two talents (Core Rules 68) Minor Magic and Major Magic. Taking these two talents gives me access to a first level wizard spell which I can cast twice a day. The caster level is my rogue level. I do not have two talents before fourth level unless the rogue spends a feat to get an extra talent.
If I understand this correctly, taking these two rogue talents makes me an arcane spell caster equal to my rogue level. The chief benefit of this interpretation is that if I take Major Magic I do not have to take Master Craftsman (Core Rules 130) in order to craft magic items as a pure rogue.
No, it is not a simple. Of course this is matter to ionterpretation but:
Minor Magic (Sp): A rogue with this talent gains the ability to cast a 0-level spell from the sorcerer/wizard spell list. This spell can be cast three times a day as a spell-like ability. The caster level for this ability is equal to the rogue's level. The save DC for this spell is 10 + the rogue's Intelligence modifier. The rogue must have an Intelligence of at least 10 to select this talent.
While the description states "ability to cast a spell" it also specifies that it is used as a spell-like ability so it is subject to interpretation. I would rather stay that taking this talent does not make the Rogue arcane spellcaster as merly getting spell-like abilities does not make one.
Taking Major Magic should subject me to a -4 Penalty to my saving throw vs. a Feeblemind spell (Core Rules 281).
Should not, at least according to above possible interpretations. Arcane spellcasters suffer the penalty but creatures with spell-like abilities do not (note that in 3.0 creatures with "arcane spell-like abilities" suffered the penalty as well). The same would apply to The Robes Of Archmagii.
I don't know if the spell-like ability caster level does count as prerequisite for item creation feats but I haven't found any rules contradicting it in Item Creation feat general description.
