diff --git a/cmd/kod/internal/generate_generator.go b/cmd/kod/internal/generate_generator.go
index aff2d4c..4e18003 100644
--- a/cmd/kod/internal/generate_generator.go
+++ b/cmd/kod/internal/generate_generator.go
@@ -740,13 +740,14 @@ func (g *generator) generateLocalStubs(p printFn) {
 	p(``)
 	p(``)
 	p(`// Local stub implementations.`)
+	p(``)
 	g.tset.importPackage("context", "context")
 
 	var b strings.Builder
 	for _, comp := range g.components {
 
 		stub := notExported(comp.intfName()) + "_local_stub"
-		p(``)
+		p(`// %s is a local stub implementation of [%s].`, stub, g.tset.genTypeString(comp.intf))
 		p(`type %s struct{`, stub)
 		p(`	impl %s`, g.componentRef(comp))
 		p(`	name   string`)
diff --git a/cmd/kod/internal/struct2interface.go b/cmd/kod/internal/struct2interface.go
index 64dab9f..37bc13e 100644
--- a/cmd/kod/internal/struct2interface.go
+++ b/cmd/kod/internal/struct2interface.go
@@ -296,9 +296,12 @@ func makeFile(file string) (*makeInterfaceFile, error) {
 		}
 	}
 
+	for _, structName := range structInfo.structs {
+		typeDoc[structName] = fmt.Sprintf("%s is a component interface implemented by [%s].\n%s",
+			structInfo.struct2Interfaces[structName], structName, structInfo.typeDoc[structName])
+	}
+
 	for structName, methods := range structInfo.methods {
-		typeDoc[structName] = fmt.Sprintf("%s is a component that implements %s.\n%s",
-			structName, structInfo.struct2Interfaces[structName], structInfo.typeDoc[structName])
 		for _, m := range methods {
 			allMethods[structName] = append(allMethods[structName], m.Lines()...)
 		}
diff --git a/examples/helloworld/kod_gen.go b/examples/helloworld/kod_gen.go
index d49f629..91a6fc8 100644
--- a/examples/helloworld/kod_gen.go
+++ b/examples/helloworld/kod_gen.go
@@ -103,6 +103,7 @@ var _ kod.InstanceOf[kod.Main] = (*App)(nil)
 
 // Local stub implementations.
 
+// helloWorld_local_stub is a local stub implementation of [HelloWorld].
 type helloWorld_local_stub struct {
 	impl        HelloWorld
 	name        string
@@ -134,6 +135,7 @@ func (s helloWorld_local_stub) SayHello(ctx context.Context) {
 	_ = s.interceptor(ctx, info, []any{}, []any{}, call)
 }
 
+// helloWorldInterceptor_local_stub is a local stub implementation of [HelloWorldInterceptor].
 type helloWorldInterceptor_local_stub struct {
 	impl        HelloWorldInterceptor
 	name        string
@@ -165,6 +167,7 @@ func (s helloWorldInterceptor_local_stub) SayHello(ctx context.Context) {
 	_ = s.interceptor(ctx, info, []any{}, []any{}, call)
 }
 
+// helloWorldLazy_local_stub is a local stub implementation of [HelloWorldLazy].
 type helloWorldLazy_local_stub struct {
 	impl        HelloWorldLazy
 	name        string
@@ -196,6 +199,7 @@ func (s helloWorldLazy_local_stub) SayHello(ctx context.Context) {
 	_ = s.interceptor(ctx, info, []any{}, []any{}, call)
 }
 
+// main_local_stub is a local stub implementation of [kod.Main].
 type main_local_stub struct {
 	impl        kod.Main
 	name        string
diff --git a/examples/helloworld/kod_gen_interface.go b/examples/helloworld/kod_gen_interface.go
index e8fcb57..6648e28 100644
--- a/examples/helloworld/kod_gen_interface.go
+++ b/examples/helloworld/kod_gen_interface.go
@@ -6,17 +6,17 @@ import (
 	"context"
 )
 
-// helloWorld is a component that implements HelloWorld.
+// HelloWorld is a component interface implemented by [helloWorld].
 type HelloWorld interface {
 	SayHello(ctx context.Context)
 }
 
-// lazyHelloWorld is a component that implements HelloWorldLazy.
+// HelloWorldLazy is a component interface implemented by [lazyHelloWorld].
 type HelloWorldLazy interface {
 	SayHello(ctx context.Context)
 }
 
-// helloWorldInterceptor is a component that implements HelloWorldInterceptor.
+// HelloWorldInterceptor is a component interface implemented by [helloWorldInterceptor].
 type HelloWorldInterceptor interface {
 	SayHello(ctx context.Context)
 }
diff --git a/tests/case1/kod_gen.go b/tests/case1/kod_gen.go
index 4bf04c0..ca60813 100644
--- a/tests/case1/kod_gen.go
+++ b/tests/case1/kod_gen.go
@@ -335,6 +335,7 @@ var _ kod.InstanceOf[testService] = (*serviceImpl)(nil)
 
 // Local stub implementations.
 
+// hTTPController_local_stub is a local stub implementation of [HTTPController].
 type hTTPController_local_stub struct {
 	impl        HTTPController
 	name        string
@@ -350,6 +351,7 @@ func (s hTTPController_local_stub) Foo(a0 http.ResponseWriter, a1 *http.Request)
 	return
 }
 
+// interceptorRetry_local_stub is a local stub implementation of [InterceptorRetry].
 type interceptorRetry_local_stub struct {
 	impl        InterceptorRetry
 	name        string
@@ -405,6 +407,7 @@ func (s interceptorRetry_local_stub) TestNormal(ctx context.Context) (err error)
 	return
 }
 
+// lazyInitComponent_local_stub is a local stub implementation of [LazyInitComponent].
 type lazyInitComponent_local_stub struct {
 	impl        LazyInitComponent
 	name        string
@@ -437,6 +440,7 @@ func (s lazyInitComponent_local_stub) Try(ctx context.Context) (err error) {
 	return
 }
 
+// lazyInitImpl_local_stub is a local stub implementation of [LazyInitImpl].
 type lazyInitImpl_local_stub struct {
 	impl        LazyInitImpl
 	name        string
@@ -468,6 +472,7 @@ func (s lazyInitImpl_local_stub) Try(ctx context.Context) {
 	_ = s.interceptor(ctx, info, []any{}, []any{}, call)
 }
 
+// main_local_stub is a local stub implementation of [kod.Main].
 type main_local_stub struct {
 	impl        kod.Main
 	name        string
@@ -477,6 +482,7 @@ type main_local_stub struct {
 // Check that main_local_stub implements the kod.Main interface.
 var _ kod.Main = (*main_local_stub)(nil)
 
+// test1Component_local_stub is a local stub implementation of [Test1Component].
 type test1Component_local_stub struct {
 	impl        Test1Component
 	name        string
@@ -510,6 +516,7 @@ func (s test1Component_local_stub) Foo(ctx context.Context, a1 *FooReq) (r0 *Foo
 	return
 }
 
+// test2Component_local_stub is a local stub implementation of [Test2Component].
 type test2Component_local_stub struct {
 	impl        Test2Component
 	name        string
@@ -525,6 +532,7 @@ func (s test2Component_local_stub) GetClient() (r0 *http.Client) {
 	return
 }
 
+// ctxInterface_local_stub is a local stub implementation of [ctxInterface].
 type ctxInterface_local_stub struct {
 	impl        ctxInterface
 	name        string
@@ -556,6 +564,7 @@ func (s ctxInterface_local_stub) Foo(ctx context.Context) {
 	_ = s.interceptor(ctx, info, []any{}, []any{}, call)
 }
 
+// panicCaseInterface_local_stub is a local stub implementation of [panicCaseInterface].
 type panicCaseInterface_local_stub struct {
 	impl        panicCaseInterface
 	name        string
@@ -587,6 +596,7 @@ func (s panicCaseInterface_local_stub) TestPanic(ctx context.Context) {
 	_ = s.interceptor(ctx, info, []any{}, []any{}, call)
 }
 
+// panicNoRecvoeryCaseInterface_local_stub is a local stub implementation of [panicNoRecvoeryCaseInterface].
 type panicNoRecvoeryCaseInterface_local_stub struct {
 	impl        panicNoRecvoeryCaseInterface
 	name        string
@@ -618,6 +628,7 @@ func (s panicNoRecvoeryCaseInterface_local_stub) TestPanic(ctx context.Context)
 	_ = s.interceptor(ctx, info, []any{}, []any{}, call)
 }
 
+// test1Controller_local_stub is a local stub implementation of [test1Controller].
 type test1Controller_local_stub struct {
 	impl        test1Controller
 	name        string
@@ -627,6 +638,7 @@ type test1Controller_local_stub struct {
 // Check that test1Controller_local_stub implements the test1Controller interface.
 var _ test1Controller = (*test1Controller_local_stub)(nil)
 
+// testEchoController_local_stub is a local stub implementation of [testEchoController].
 type testEchoController_local_stub struct {
 	impl        testEchoController
 	name        string
@@ -648,6 +660,7 @@ func (s testEchoController_local_stub) Hello(a0 echo.Context) (err error) {
 	return
 }
 
+// testGinController_local_stub is a local stub implementation of [testGinController].
 type testGinController_local_stub struct {
 	impl        testGinController
 	name        string
@@ -663,6 +676,7 @@ func (s testGinController_local_stub) Hello(a0 *gin.Context) {
 	return
 }
 
+// testRepository_local_stub is a local stub implementation of [testRepository].
 type testRepository_local_stub struct {
 	impl        testRepository
 	name        string
@@ -695,6 +709,7 @@ func (s testRepository_local_stub) Foo(ctx context.Context) (err error) {
 	return
 }
 
+// testService_local_stub is a local stub implementation of [testService].
 type testService_local_stub struct {
 	impl        testService
 	name        string
diff --git a/tests/case1/kod_gen_interface.go b/tests/case1/kod_gen_interface.go
index e9e4587..aa89faf 100644
--- a/tests/case1/kod_gen_interface.go
+++ b/tests/case1/kod_gen_interface.go
@@ -10,36 +10,37 @@ import (
 	"github.com/labstack/echo/v4"
 )
 
+// test1Controller is a component interface implemented by [test1ControllerImpl].
 type test1Controller interface {
 }
 
-// serviceImpl is a component that implements testService.
+// testService is a component interface implemented by [serviceImpl].
 type testService interface {
 	Foo(ctx context.Context) error
 }
 
-// modelImpl is a component that implements testRepository.
+// testRepository is a component interface implemented by [modelImpl].
 type testRepository interface {
 	Foo(ctx context.Context) error
 }
 
-// test1Component is a component that implements Test1Component.
+// Test1Component is a component interface implemented by [test1Component].
 type Test1Component interface {
 	Foo(ctx context.Context, req *FooReq) (*FooRes, error)
 }
 
-// test2Component is a component that implements Test2Component.
+// Test2Component is a component interface implemented by [test2Component].
 type Test2Component interface {
 	GetClient() *http.Client
 }
 
-// ctxImpl is a component that implements ctxInterface.
+// ctxInterface is a component interface implemented by [ctxImpl].
 type ctxInterface interface {
 	// Foo is a http handler
 	Foo(ctx context.Context)
 }
 
-// testEchoControllerImpl is a component that implements testEchoController.
+// testEchoController is a component interface implemented by [testEchoControllerImpl].
 type testEchoController interface {
 	// Hello is a method of testEchoControllerImpl
 	Hello(c echo.Context) error
@@ -47,40 +48,40 @@ type testEchoController interface {
 	Error(c echo.Context) error
 }
 
-// testGinControllerImpl is a component that implements testGinController.
+// testGinController is a component interface implemented by [testGinControllerImpl].
 type testGinController interface {
 	// Hello is a method of testGinControllerImpl
 	Hello(c *gin.Context)
 }
 
-// httpControllerImpl is a component that implements HTTPController.
+// HTTPController is a component interface implemented by [httpControllerImpl].
 type HTTPController interface {
 	// Foo is a http handler
 	Foo(w http.ResponseWriter, r *http.Request)
 }
 
-// interceptorRetry is a component that implements InterceptorRetry.
+// InterceptorRetry is a component interface implemented by [interceptorRetry].
 type InterceptorRetry interface {
 	TestError(ctx context.Context) error
 	TestNormal(ctx context.Context) error
 }
 
-// lazyInitImpl is a component that implements LazyInitImpl.
+// LazyInitImpl is a component interface implemented by [lazyInitImpl].
 type LazyInitImpl interface {
 	Try(ctx context.Context)
 }
 
-// lazyInitComponent is a component that implements LazyInitComponent.
+// LazyInitComponent is a component interface implemented by [lazyInitComponent].
 type LazyInitComponent interface {
 	Try(ctx context.Context) error
 }
 
-// panicCase is a component that implements panicCaseInterface.
+// panicCaseInterface is a component interface implemented by [panicCase].
 type panicCaseInterface interface {
 	TestPanic(ctx context.Context)
 }
 
-// panicNoRecvoeryCase is a component that implements panicNoRecvoeryCaseInterface.
+// panicNoRecvoeryCaseInterface is a component interface implemented by [panicNoRecvoeryCase].
 type panicNoRecvoeryCaseInterface interface {
 	TestPanic(ctx context.Context)
 }
diff --git a/tests/case2/kod_gen.go b/tests/case2/kod_gen.go
index 055e6de..11a2906 100644
--- a/tests/case2/kod_gen.go
+++ b/tests/case2/kod_gen.go
@@ -80,6 +80,7 @@ var _ kod.InstanceOf[Test2Component] = (*test2Component)(nil)
 
 // Local stub implementations.
 
+// main_local_stub is a local stub implementation of [kod.Main].
 type main_local_stub struct {
 	impl        kod.Main
 	name        string
@@ -89,6 +90,7 @@ type main_local_stub struct {
 // Check that main_local_stub implements the kod.Main interface.
 var _ kod.Main = (*main_local_stub)(nil)
 
+// test1Component_local_stub is a local stub implementation of [Test1Component].
 type test1Component_local_stub struct {
 	impl        Test1Component
 	name        string
@@ -121,6 +123,7 @@ func (s test1Component_local_stub) Foo(ctx context.Context, a1 *FooReq) (err err
 	return
 }
 
+// test2Component_local_stub is a local stub implementation of [Test2Component].
 type test2Component_local_stub struct {
 	impl        Test2Component
 	name        string
diff --git a/tests/case2/kod_gen_interface.go b/tests/case2/kod_gen_interface.go
index 91266a1..0c3b4b5 100644
--- a/tests/case2/kod_gen_interface.go
+++ b/tests/case2/kod_gen_interface.go
@@ -6,12 +6,12 @@ import (
 	"context"
 )
 
-// test1Component is a component that implements Test1Component.
+// Test1Component is a component interface implemented by [test1Component].
 type Test1Component interface {
 	Foo(ctx context.Context, req *FooReq) error
 }
 
-// test2Component is a component that implements Test2Component.
+// Test2Component is a component interface implemented by [test2Component].
 type Test2Component interface {
 	Foo(ctx context.Context, req *FooReq) error
 }
diff --git a/tests/case3/kod_gen.go b/tests/case3/kod_gen.go
index 039a233..4bc4d89 100644
--- a/tests/case3/kod_gen.go
+++ b/tests/case3/kod_gen.go
@@ -102,6 +102,7 @@ var _ kod.InstanceOf[Test3Component] = (*test3Component)(nil)
 
 // Local stub implementations.
 
+// main_local_stub is a local stub implementation of [kod.Main].
 type main_local_stub struct {
 	impl        kod.Main
 	name        string
@@ -111,6 +112,7 @@ type main_local_stub struct {
 // Check that main_local_stub implements the kod.Main interface.
 var _ kod.Main = (*main_local_stub)(nil)
 
+// test1Component_local_stub is a local stub implementation of [Test1Component].
 type test1Component_local_stub struct {
 	impl        Test1Component
 	name        string
@@ -143,6 +145,7 @@ func (s test1Component_local_stub) Foo(ctx context.Context, a1 *FooReq) (err err
 	return
 }
 
+// test2Component_local_stub is a local stub implementation of [Test2Component].
 type test2Component_local_stub struct {
 	impl        Test2Component
 	name        string
@@ -175,6 +178,7 @@ func (s test2Component_local_stub) Foo(ctx context.Context, a1 *FooReq) (err err
 	return
 }
 
+// test3Component_local_stub is a local stub implementation of [Test3Component].
 type test3Component_local_stub struct {
 	impl        Test3Component
 	name        string
diff --git a/tests/case3/kod_gen_interface.go b/tests/case3/kod_gen_interface.go
index 1351906..19ebb3d 100644
--- a/tests/case3/kod_gen_interface.go
+++ b/tests/case3/kod_gen_interface.go
@@ -6,17 +6,17 @@ import (
 	"context"
 )
 
-// test1Component is a component that implements Test1Component.
+// Test1Component is a component interface implemented by [test1Component].
 type Test1Component interface {
 	Foo(ctx context.Context, req *FooReq) error
 }
 
-// test2Component is a component that implements Test2Component.
+// Test2Component is a component interface implemented by [test2Component].
 type Test2Component interface {
 	Foo(ctx context.Context, req *FooReq) error
 }
 
-// test3Component is a component that implements Test3Component.
+// Test3Component is a component interface implemented by [test3Component].
 type Test3Component interface {
 	Foo(ctx context.Context, req *FooReq) error
 }
diff --git a/tests/case4/kod_gen.go b/tests/case4/kod_gen.go
index 902576d..38a2aff 100644
--- a/tests/case4/kod_gen.go
+++ b/tests/case4/kod_gen.go
@@ -102,6 +102,7 @@ var _ kod.InstanceOf[Test3Component] = (*test3Component)(nil)
 
 // Local stub implementations.
 
+// main_local_stub is a local stub implementation of [kod.Main].
 type main_local_stub struct {
 	impl        kod.Main
 	name        string
@@ -111,6 +112,7 @@ type main_local_stub struct {
 // Check that main_local_stub implements the kod.Main interface.
 var _ kod.Main = (*main_local_stub)(nil)
 
+// test1Component_local_stub is a local stub implementation of [Test1Component].
 type test1Component_local_stub struct {
 	impl        Test1Component
 	name        string
@@ -143,6 +145,7 @@ func (s test1Component_local_stub) Foo(ctx context.Context, a1 *FooReq) (err err
 	return
 }
 
+// test2Component_local_stub is a local stub implementation of [Test2Component].
 type test2Component_local_stub struct {
 	impl        Test2Component
 	name        string
@@ -175,6 +178,7 @@ func (s test2Component_local_stub) Foo(ctx context.Context, a1 *FooReq) (err err
 	return
 }
 
+// test3Component_local_stub is a local stub implementation of [Test3Component].
 type test3Component_local_stub struct {
 	impl        Test3Component
 	name        string
diff --git a/tests/case4/kod_gen_interface.go b/tests/case4/kod_gen_interface.go
index 25735c0..2e5d7b0 100644
--- a/tests/case4/kod_gen_interface.go
+++ b/tests/case4/kod_gen_interface.go
@@ -6,17 +6,17 @@ import (
 	"context"
 )
 
-// test1Component is a component that implements Test1Component.
+// Test1Component is a component interface implemented by [test1Component].
 type Test1Component interface {
 	Foo(ctx context.Context, req *FooReq) error
 }
 
-// test2Component is a component that implements Test2Component.
+// Test2Component is a component interface implemented by [test2Component].
 type Test2Component interface {
 	Foo(ctx context.Context, req *FooReq) error
 }
 
-// test3Component is a component that implements Test3Component.
+// Test3Component is a component interface implemented by [test3Component].
 type Test3Component interface {
 	Foo(ctx context.Context, req *FooReq) error
 }
diff --git a/tests/case5/kod_gen.go b/tests/case5/kod_gen.go
index e12dcb0..88c73e0 100644
--- a/tests/case5/kod_gen.go
+++ b/tests/case5/kod_gen.go
@@ -59,6 +59,7 @@ var _ kod.InstanceOf[TestRefStruct1] = (*testRefStruct1)(nil)
 
 // Local stub implementations.
 
+// main_local_stub is a local stub implementation of [kod.Main].
 type main_local_stub struct {
 	impl        kod.Main
 	name        string
@@ -68,6 +69,7 @@ type main_local_stub struct {
 // Check that main_local_stub implements the kod.Main interface.
 var _ kod.Main = (*main_local_stub)(nil)
 
+// testRefStruct1_local_stub is a local stub implementation of [TestRefStruct1].
 type testRefStruct1_local_stub struct {
 	impl        TestRefStruct1
 	name        string
diff --git a/tests/case5/kod_gen_interface.go b/tests/case5/kod_gen_interface.go
index 69ef3a2..5cedf32 100644
--- a/tests/case5/kod_gen_interface.go
+++ b/tests/case5/kod_gen_interface.go
@@ -2,5 +2,6 @@
 
 package case5
 
+// TestRefStruct1 is a component interface implemented by [testRefStruct1].
 type TestRefStruct1 interface {
 }
diff --git a/tests/graphcase/kod_gen.go b/tests/graphcase/kod_gen.go
index b013ac6..e3b00af 100644
--- a/tests/graphcase/kod_gen.go
+++ b/tests/graphcase/kod_gen.go
@@ -147,6 +147,7 @@ var _ kod.InstanceOf[testService] = (*serviceImpl)(nil)
 
 // Local stub implementations.
 
+// hTTPController_local_stub is a local stub implementation of [HTTPController].
 type hTTPController_local_stub struct {
 	impl        HTTPController
 	name        string
@@ -162,6 +163,7 @@ func (s hTTPController_local_stub) Foo(a0 http.ResponseWriter, a1 http.Request)
 	return
 }
 
+// main_local_stub is a local stub implementation of [kod.Main].
 type main_local_stub struct {
 	impl        kod.Main
 	name        string
@@ -171,6 +173,7 @@ type main_local_stub struct {
 // Check that main_local_stub implements the kod.Main interface.
 var _ kod.Main = (*main_local_stub)(nil)
 
+// test1Component_local_stub is a local stub implementation of [Test1Component].
 type test1Component_local_stub struct {
 	impl        Test1Component
 	name        string
@@ -203,6 +206,7 @@ func (s test1Component_local_stub) Foo(ctx context.Context, a1 *FooReq) (err err
 	return
 }
 
+// test1Controller_local_stub is a local stub implementation of [test1Controller].
 type test1Controller_local_stub struct {
 	impl        test1Controller
 	name        string
@@ -218,6 +222,7 @@ func (s test1Controller_local_stub) Foo(a0 *gin.Context) {
 	return
 }
 
+// testModel_local_stub is a local stub implementation of [testModel].
 type testModel_local_stub struct {
 	impl        testModel
 	name        string
@@ -250,6 +255,7 @@ func (s testModel_local_stub) Foo(ctx context.Context) (err error) {
 	return
 }
 
+// testService_local_stub is a local stub implementation of [testService].
 type testService_local_stub struct {
 	impl        testService
 	name        string
diff --git a/tests/graphcase/kod_gen_interface.go b/tests/graphcase/kod_gen_interface.go
index 8434324..87f0fbb 100644
--- a/tests/graphcase/kod_gen_interface.go
+++ b/tests/graphcase/kod_gen_interface.go
@@ -9,27 +9,27 @@ import (
 	"github.com/gin-gonic/gin"
 )
 
-// test1ControllerImpl is a component that implements test1Controller.
+// test1Controller is a component interface implemented by [test1ControllerImpl].
 type test1Controller interface {
 	Foo(cccccc *gin.Context)
 }
 
-// httpControllerImpl is a component that implements HTTPController.
+// HTTPController is a component interface implemented by [httpControllerImpl].
 type HTTPController interface {
 	Foo(w http.ResponseWriter, r http.Request)
 }
 
-// serviceImpl is a component that implements testService.
+// testService is a component interface implemented by [serviceImpl].
 type testService interface {
 	Foo(ctx context.Context) error
 }
 
-// modelImpl is a component that implements testModel.
+// testModel is a component interface implemented by [modelImpl].
 type testModel interface {
 	Foo(ctx context.Context) error
 }
 
-// test1Component is a component that implements Test1Component.
+// Test1Component is a component interface implemented by [test1Component].
 type Test1Component interface {
 	Foo(ctx context.Context, req *FooReq) error
 }