refactor(mir): phase260 p0.1 strangler hardening + smoke fixtures

src/runner/modes/vm.rs

@@ -488,6 +488,41 @@ impl NyashRunner {
             }
         }
 
+        // CLI emit: MIR JSON / EXE
+        // NOTE: These flags are CLI-level and should work regardless of selected backend.
+        // The VM runner is a common default backend, so we honor them here and exit early.
+        {
+            let groups = self.config.as_groups();
+            if let Some(path) = groups.emit.emit_mir_json.as_ref() {
+                let p = std::path::Path::new(path);
+                if let Err(e) = crate::runner::mir_json_emit::emit_mir_json_for_harness_bin(
+                    &module_vm, p,
+                ) {
+                    eprintln!("❌ MIR JSON emit error: {}", e);
+                    process::exit(1);
+                }
+                if !quiet_pipe {
+                    println!("MIR JSON written: {}", p.display());
+                }
+                process::exit(0);
+            }
+            if let Some(exe_out) = groups.emit.emit_exe.as_ref() {
+                if let Err(e) = crate::runner::modes::common_util::exec::ny_llvmc_emit_exe_bin(
+                    &module_vm,
+                    exe_out,
+                    groups.emit.emit_exe_nyrt.as_deref(),
+                    groups.emit.emit_exe_libs.as_deref(),
+                ) {
+                    eprintln!("❌ {}", e);
+                    process::exit(1);
+                }
+                if !quiet_pipe {
+                    println!("EXE written: {}", exe_out);
+                }
+                process::exit(0);
+            }
+        }
+
         // Optional: dump MIR for diagnostics
         // Phase 25.1: File dump for offline analysis (ParserBox等)
         if let Ok(path) = std::env::var("RUST_MIR_DUMP_PATH") {