KOS_OP_VAR_ITEM_INPLACE_CONST

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

• Stack: [..., key] → [...]. Reduce obj[key] in place with the pool constant and store it back with the object resolved by name and the key on the stack.

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

• Compiler form: Folded by the compress pipeline from CONST operand ahead of VAR_ITEM_INPLACE at a count of one, the row compile/inplace-item shapes for a symbol object under a computed key. May lower to FAST_ITEM_INPLACE_CONST.

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