extract class body initialization from script call

Author: mgomes

docs/architecture.md

@@ -24,6 +24,7 @@ Key files:
 - `vibes/execution_script.go` (script call surface and call-time orchestration)
 - `vibes/execution_script_helpers.go` (compiled script lookup/order/ownership and call-time cloning helpers)
 - `vibes/execution_call_capabilities.go` (call-time capability binding and contract registration)
+- `vibes/execution_call_classes.go` (call-time class body initialization in class-local scope)
 - `vibes/execution_function_args.go` (function argument/default/type/ivar binding helpers)
 - `vibes/execution_calls.go` (callable dispatch + function invocation)
 - `vibes/execution_call_expr.go` (call expression target/args/kwargs/block evaluation)

vibes/execution_call_classes.go

@@ -0,0 +1,20 @@
+package vibes
+
+func initializeClassBodiesForCall(exec *Execution, root *Env, callClasses map[string]*ClassDef) error {
+	for name, classDef := range callClasses {
+		if len(classDef.Body) == 0 {
+			continue
+		}
+		classVal, _ := root.Get(name)
+		env := newEnv(root)
+		env.Define("self", classVal)
+		exec.pushReceiver(classVal)
+		_, _, err := exec.evalStatements(classDef.Body, env)
+		exec.popReceiver()
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

vibes/execution_script.go

@@ -75,20 +75,8 @@ func (s *Script) Call(ctx context.Context, name string, args []Value, opts CallO
 		return NewNil(), err
 	}
 
-	// initialize class bodies (class vars)
-	for name, classDef := range callClasses {
-		if len(classDef.Body) == 0 {
-			continue
-		}
-		classVal, _ := root.Get(name)
-		env := newEnv(root)
-		env.Define("self", classVal)
-		exec.pushReceiver(classVal)
-		_, _, err := exec.evalStatements(classDef.Body, env)
-		exec.popReceiver()
-		if err != nil {
-			return NewNil(), err
-		}
+	if err := initializeClassBodiesForCall(exec, root, callClasses); err != nil {
+		return NewNil(), err
 	}
 
 	callEnv := newEnv(root)