KOS_OP_SWITCH_EQ_VAR

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

• Stack: [..., s]. Read rhs from the frame namespace by the name in a1, then compare s == rhs.

  • Match: pop s; pc = a0.

  • Mismatch: fall through; stack unchanged.

• Compiler form: tuple arg ("label", "name", 0, 0) pre-compile.