stage3: unify to cleanup; MIR return-defer; docs+smokes updated; LLVM(harness): finalize_phis ownership, ret.py simplified, uses-predeclare; cleanup return override green; method-postfix cleanup return WIP (PHI head)

src/runtime/plugin_loader_v2/enabled/loader.rs

@@ -439,6 +439,19 @@ impl PluginLoaderV2 {
                 }
                 Ok(None)
             }
+            ("env.result", "ok") => {
+                // Wrap the first argument as Result.Ok; if missing, use Void
+                let v = args.get(0).map(|b| b.clone_box()).unwrap_or_else(|| Box::new(crate::box_trait::VoidBox::new()));
+                Ok(Some(Box::new(crate::boxes::result::NyashResultBox::new_ok(v))))
+            }
+            ("env.result", "err") => {
+                // Wrap the first argument as Result.Err; if missing, synthesize a StringBox("Error")
+                let e: Box<dyn NyashBox> = args
+                    .get(0)
+                    .map(|b| b.clone_box())
+                    .unwrap_or_else(|| Box::new(crate::box_trait::StringBox::new("Error")));
+                Ok(Some(Box::new(crate::boxes::result::NyashResultBox::new_err(e))))
+            }
             ("env.modules", "set") => {
                 if args.len() >= 2 {
                     let key = args[0].to_string_box().value;

src/runtime/plugin_loader_v2/enabled/mod.rs

@@ -35,8 +35,8 @@ pub extern "C" fn nyash_plugin_invoke_v2_shim(
     result_len: *mut usize,
 ) -> i32 {
     if let Some(f) = box_invoke_for_type_id(type_id) {
-        // Safety: Plugin-provided function pointer; adhere to C ABI
-        return unsafe { f(instance_id, method_id, args, args_len, result, result_len) };
+        // BoxInvokeFn is extern "C"; call directly (no additional unsafe needed here)
+        return f(instance_id, method_id, args, args_len, result, result_len);
     }
     // E_PLUGIN (-5) when not found
     -5