KOS_OP_VAR_ITEM_VAR_REF

• Style: EXTRA (VAR, VAR, NOARG, NOARG).

• Stack: [...] → [..., value]. Push an ItemRef over obj[key] with the object resolved by name and the key resolved by name.

• Cache: none; a VAR row survives lowering only for a name with no fast slot.

• Compiler form: Folded by the compress pipeline from VAR obj, VAR key, ITEM_REF. May lower to FAST_ITEM_FAST_REF.

• Implementation: koskari/lib/opcode/VAR_ITEM_VAR_REF.c