KOS_OP_VAR_ITEM_STORE_VAR

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

• Stack: [..., key] → [...]. Set obj[key] = value with the object resolved by name, the key on the stack and the value 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 value ahead of VAR_ITEM_STORE, the row compile/set-item shapes for a symbol object under a computed key. May lower to FAST_ITEM_STORE_FAST.

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