KOS_OP_FAST_REF

• Style: FASTVAR. Arg = fast local slot index.

• Stack: [...] → [..., ref]. Push reference to slot.

• Invariants: Slot index in range.

Example: Push reference to slot 0.

index	opcode	arg	arg view	comment
0	FAST_REF	0	0 (a)	stack: […, ref]