KOS_OP_TAIL_CALL_VAR_NAMES

• Style: EXTRA. Schema: VAR (name), CONST (kwarg names tuple), COUNT (npos).

• Stack: Same layout as CALL_VAR_NAMES. Tail semantics as KOS_OP_TAIL_CALL_ATTR: the caller’s frame is reused rather than a new frame pushed.

• Compiler form: Promotion relabel of a tail-position CALL_VAR_NAMES; lowers to TAIL_CALL_FAST_NAMES.