Modifying eidolon progression

[frumple]

I have a class archetype that modifies the progression of the eidolon (including giving it a specific subtype). I can remove eidolon class specials by assigning various CompPwNot tags to the eidolon, but I need to go further and replace these with new abilities.

Ideas of how I can do this?

[Aaron]

Make some CompPower tags, then create a mechanic and bootstrap the powers you want to add to that mechanic with conditions looking for the new CompPower tags. Have your archetype transition to the eidolon and apply said CompPower tags to activate the conditions. I think that should work anyway.

[frumple]

Awesome. Where can I define the CompPower tags or will I need to make my own version?

[Aaron]

I believe they are dynamic tags, so you just need to define them on any thing which will be available in the same package. Perhaps your archetype or some generic ability that doesn't get bootstrapped anywhere and exists solely as a holder of tags.