diff --git a/app/app.go b/app/app.go
index 0d7a0d9..3a4dbd0 100644
--- a/app/app.go
+++ b/app/app.go
@@ -47,7 +47,7 @@ func step(ctx lib.Context, sig <-chan os.Signal) bool {
 			//ctx.LogInfo("Dispatcher stopped", m.Map{})
 			return false
 		}
-		//ctx.HandleMsg(&msg)
+		//ctx.HandleMsg(msg)
 	}
 	return true
 }
diff --git a/config/config.go b/config/config.go
index 85c6cec..a963534 100644
--- a/config/config.go
+++ b/config/config.go
@@ -20,6 +20,7 @@ func Start(ctx lib.Context) {
 type Base struct {
 	name     string
 	starter  lib.StartProc
+	actions  []lib.ActionConfig
 	children []lib.Config
 }
 
@@ -31,6 +32,10 @@ func (cfg *Base) Starter() lib.StartProc {
 	return cfg.starter
 }
 
+func (cfg *Base) Actions() []lib.ActionConfig {
+	return cfg.actions
+}
+
 func (cfg *Base) Children() []lib.Config {
 	return cfg.children
 }
@@ -43,6 +48,7 @@ func MakeBase(name string, starter lib.StartProc) *Base {
 	return &Base{
 		name:    name,
 		starter: starter,
+		actions: nil,
 	}
 }
 
diff --git a/lib/lib.go b/lib/lib.go
index 8f302ce..158e8e4 100644
--- a/lib/lib.go
+++ b/lib/lib.go
@@ -1,3 +1,5 @@
+// Package `lib` provides a set of common types (mostly interfaces
+// and function declarations) and some basic functions.
 package lib
 
 import (
@@ -5,15 +7,24 @@ import (
 	"sync"
 )
 
+type ActionSpec interface {
+	Handler() ActionHandler
+	Receivers() []string
+}
+
+type ActionConfig interface {
+	Pattern() string
+	Specs() []ActionSpec
+}
+
 type Config interface {
 	Name() string
 	Starter() StartProc
+	Actions() []ActionConfig
 	Children() []Config
 	Add(Config)
 }
 
-type Message interface{}
-
 type Services map[string]Context
 
 type ContextState interface{}
@@ -31,8 +42,18 @@ type Context interface {
 	Stop()
 }
 
+type Message interface{}
+
+type Action interface {
+	Context() Context
+	Spec() ActionSpec
+	Message() Message
+}
+
 type Proc = func(Context)
 type StartProc = Proc
+type MessageHandler = func(Context, Message)
+type ActionHandler = func(Action)
 
 // async Runners