- Lower And/Or to branch+PHI (RHS not evaluated) - Always slotify compare operands (dominance safety) - Insert single-predecessor PHIs at then/else/short-circuit entries - pin_to_slot now logs (NYASH_PIN_TRACE) and participates in PHI - Rewrite user-defined instance method calls to Box.method/Arity (builder) - VM fallback: BoxCall on InstanceBox dispatches to lowered functions with 'me'+args - Keep plugin/BoxCall path for core boxes (String/Array/Map) - Add env-gated pre-pin for if/loop (NYASH_MIR_PREPIN) - CURRENT_TASK: add SSA/userbox plan, debug steps, acceptance criteria