I believe in replacement of the feats, you simply need to show IG lessons of learning the techniques. I know there are plays who can Craft Wondrous Item and definitely know there are a good few who can Craft Golem.
Naturally once scripting requests are unlocked, you could always shove a custom feat and do something special with them.
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"Operating in the border between light and darkness, shadowdancers
are nimble artists of deception. They are mysterious and
unknown, never completely trusted but always inducing wonder
when met"