hv1: early-exit at main (no plugin init); tokenizer: Stage-3 single-quote + full escapes (\/ \b \f \' \r fix); builder: route BinOp via SSOT emit_binop_to_dst; hv1 verify canary route (builder→Core); docs: phase-20.39 updates

src/mir/mod.rs

@@ -18,6 +18,7 @@ pub mod instruction_introspection; // Introspection helpers for tests (instructi
 pub mod types; // core MIR enums (ConstValue, Ops, MirType)
 pub mod loop_api; // Minimal LoopBuilder facade (adapter-ready)
 pub mod loop_builder; // SSA loop construction with phi nodes
+pub mod ssot; // Shared helpers (SSOT) for instruction lowering
 pub mod optimizer;
 pub mod utils; // Phase 15 control flow utilities for root treatment
 pub mod phi_core; // Phase 1 scaffold: unified PHI entry (re-exports only)