diff --git a/README.md b/README.md
index 5e1c309..86267bd 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,6 @@
-Hello World
\ No newline at end of file
+version 0.1.0
+  Todo:
+    [WORKING] use MCTS for planning
+
+  Change from version: 0.0.9
+    - 
\ No newline at end of file
diff --git a/src/interface.jl b/src/interface.jl
index 2645385..f945f8e 100644
--- a/src/interface.jl
+++ b/src/interface.jl
@@ -47,18 +47,39 @@ using ..type, ..util, ..llmfunction
 
   Return\n
   -----
-    inferenced text
+    messageleft
 
   Example\n
   -----
   ```jldoctest
-  julia> using YiemAgent
+  julia> using YiemAgent, MQTTClient, GeneralUtils
+  julia> client, connection = MakeConnection("test.mosquitto.org", 1883)
+  julia> connect(client, connection)
+  julia> msgMeta = GeneralUtils.generate_msgMeta("testtopic")
+  julia> agentConfig = Dict(
+            :receiveprompt=>Dict(
+              :mqtttopic=> "testtopic/receive",
+            ),
+            :receiveinternal=>Dict(  
+              :mqtttopic=> "testtopic/internal",
+            ),
+            :text2text=>Dict(
+              :mqtttopic=> "testtopic/text2text",
+            ),
+          )
+  julia> a = YiemAgent.sommelier(
+            client,
+            msgMeta,
+            agentConfig,
+            )
+  julia> addNewMessage(a, "user", "hello")
   ```
 
   Signature\n
   -----
 """ #WORKING
-function addNewMessage(a::T1, role::String, text::T2) where {T1<:agent, T2<:AbstractString}
+function addNewMessage(a::T1, role::String, text::T2; 
+                      maximumMsg::Integer=20)::Integer where {T1<:agent, T2<:AbstractString}
   if role ∉ a.availableRole   # guard against typo
     error("role is not in agent.availableRole $(@__LINE__)")
   end
@@ -72,14 +93,14 @@ function addNewMessage(a::T1, role::String, text::T2) where {T1<:agent, T2<:Abst
   end
   messageleft = 0
 
-  if userMsg > a.maxUserMsg # delete all conversation
+  if userMsg > maximumMsg # delete all conversation
     clearMessage(a)
-    messageleft = a.maxUserMsg
+    messageleft = maximumMsg
   else
     userMsg += 1
     d = Dict(:role=> role, :text=> text, :timestamp=> Dates.now())
     push!(a.messages, d)
-    messageleft = a.maxUserMsg - userMsg
+    messageleft = maximumMsg - userMsg
   end
 
   return messageleft