diff --git a/core b/core
index fd9e5f5..2092e8d 100644
Binary files a/core and b/core differ
diff --git a/previousVersion/0.0.2/CondaPkg.toml b/previousVersion/0.0.2/CondaPkg.toml
new file mode 100644
index 0000000..f61a833
--- /dev/null
+++ b/previousVersion/0.0.2/CondaPkg.toml
@@ -0,0 +1,7 @@
+channels = ["anaconda", "conda-forge", "pytorch"]
+
+[deps]
+python = ">=3.8,<3.11"
+
+[pip.deps]
+langchain = ""
diff --git a/previousVersion/0.0.2/Manifest.toml b/previousVersion/0.0.2/Manifest.toml
new file mode 100644
index 0000000..bd46251
--- /dev/null
+++ b/previousVersion/0.0.2/Manifest.toml
@@ -0,0 +1,299 @@
+# This file is machine-generated - editing it directly is not advised
+
+julia_version = "1.9.3"
+manifest_format = "2.0"
+project_hash = "1af8dd5b4b143461cea0c3d78c642fd87183b648"
+
+[[deps.ArgTools]]
+uuid = "0dad84c5-d112-42e6-8d28-ef12dabb789f"
+version = "1.1.1"
+
+[[deps.Artifacts]]
+uuid = "56f22d72-fd6d-98f1-02f0-08ddc0907c33"
+
+[[deps.Base64]]
+uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
+
+[[deps.Compat]]
+deps = ["UUIDs"]
+git-tree-sha1 = "8a62af3e248a8c4bad6b32cbbe663ae02275e32c"
+uuid = "34da2185-b29b-5c13-b0c7-acf172513d20"
+version = "4.10.0"
+weakdeps = ["Dates", "LinearAlgebra"]
+
+    [deps.Compat.extensions]
+    CompatLinearAlgebraExt = "LinearAlgebra"
+
+[[deps.CompilerSupportLibraries_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "e66e0078-7015-5450-92f7-15fbd957f2ae"
+version = "1.0.5+0"
+
+[[deps.CondaPkg]]
+deps = ["JSON3", "Markdown", "MicroMamba", "Pidfile", "Pkg", "Preferences", "TOML"]
+git-tree-sha1 = "bbd0c518cb11acc6707190199025dbc34b6c7ca7"
+uuid = "992eb4ea-22a4-4c89-a5bb-47a3300528ab"
+version = "0.2.21"
+
+[[deps.DataAPI]]
+git-tree-sha1 = "8da84edb865b0b5b0100c0666a9bc9a0b71c553c"
+uuid = "9a962f9c-6df0-11e9-0e5d-c546b8b5ee8a"
+version = "1.15.0"
+
+[[deps.DataStructures]]
+deps = ["Compat", "InteractiveUtils", "OrderedCollections"]
+git-tree-sha1 = "3dbd312d370723b6bb43ba9d02fc36abade4518d"
+uuid = "864edb3b-99cc-5e75-8d2d-829cb0a9cfe8"
+version = "0.18.15"
+
+[[deps.DataValueInterfaces]]
+git-tree-sha1 = "bfc1187b79289637fa0ef6d4436ebdfe6905cbd6"
+uuid = "e2d170a0-9d28-54be-80f0-106bbe20a464"
+version = "1.0.0"
+
+[[deps.Dates]]
+deps = ["Printf"]
+uuid = "ade2ca70-3891-5945-98fb-dc099432e06a"
+
+[[deps.Downloads]]
+deps = ["ArgTools", "FileWatching", "LibCURL", "NetworkOptions"]
+uuid = "f43a241f-c20a-4ad4-852c-f6b1247861c6"
+version = "1.6.0"
+
+[[deps.FileWatching]]
+uuid = "7b1f6079-737a-58dc-b8bc-7a2ca5c1b5ee"
+
+[[deps.InteractiveUtils]]
+deps = ["Markdown"]
+uuid = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
+
+[[deps.IteratorInterfaceExtensions]]
+git-tree-sha1 = "a3f24677c21f5bbe9d2a714f95dcd58337fb2856"
+uuid = "82899510-4779-5014-852e-03e436cf321d"
+version = "1.0.0"
+
+[[deps.JLLWrappers]]
+deps = ["Artifacts", "Preferences"]
+git-tree-sha1 = "7e5d6779a1e09a36db2a7b6cff50942a0a7d0fca"
+uuid = "692b3bcd-3c85-4b1f-b108-f13ce0eb3210"
+version = "1.5.0"
+
+[[deps.JSON3]]
+deps = ["Dates", "Mmap", "Parsers", "PrecompileTools", "StructTypes", "UUIDs"]
+git-tree-sha1 = "95220473901735a0f4df9d1ca5b171b568b2daa3"
+uuid = "0f8b85d8-7281-11e9-16c2-39a750bddbf1"
+version = "1.13.2"
+
+[[deps.LazyArtifacts]]
+deps = ["Artifacts", "Pkg"]
+uuid = "4af54fe1-eca0-43a8-85a7-787d91b784e3"
+
+[[deps.LibCURL]]
+deps = ["LibCURL_jll", "MozillaCACerts_jll"]
+uuid = "b27032c2-a3e7-50c8-80cd-2d36dbcbfd21"
+version = "0.6.3"
+
+[[deps.LibCURL_jll]]
+deps = ["Artifacts", "LibSSH2_jll", "Libdl", "MbedTLS_jll", "Zlib_jll", "nghttp2_jll"]
+uuid = "deac9b47-8bc7-5906-a0fe-35ac56dc84c0"
+version = "7.84.0+0"
+
+[[deps.LibGit2]]
+deps = ["Base64", "NetworkOptions", "Printf", "SHA"]
+uuid = "76f85450-5226-5b5a-8eaa-529ad045b433"
+
+[[deps.LibSSH2_jll]]
+deps = ["Artifacts", "Libdl", "MbedTLS_jll"]
+uuid = "29816b5a-b9ab-546f-933c-edad1886dfa8"
+version = "1.10.2+0"
+
+[[deps.Libdl]]
+uuid = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
+
+[[deps.LinearAlgebra]]
+deps = ["Libdl", "OpenBLAS_jll", "libblastrampoline_jll"]
+uuid = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
+
+[[deps.Logging]]
+uuid = "56ddb016-857b-54e1-b83d-db4d58db5568"
+
+[[deps.MacroTools]]
+deps = ["Markdown", "Random"]
+git-tree-sha1 = "9ee1618cbf5240e6d4e0371d6f24065083f60c48"
+uuid = "1914dd2f-81c6-5fcd-8719-6d5c9610ff09"
+version = "0.5.11"
+
+[[deps.Markdown]]
+deps = ["Base64"]
+uuid = "d6f4376e-aef5-505a-96c1-9c027394607a"
+
+[[deps.MbedTLS_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "c8ffd9c3-330d-5841-b78e-0817d7145fa1"
+version = "2.28.2+0"
+
+[[deps.MicroMamba]]
+deps = ["Pkg", "Scratch", "micromamba_jll"]
+git-tree-sha1 = "011cab361eae7bcd7d278f0a7a00ff9c69000c51"
+uuid = "0b3b1443-0f03-428d-bdfb-f27f9c1191ea"
+version = "0.1.14"
+
+[[deps.Mmap]]
+uuid = "a63ad114-7e13-5084-954f-fe012c677804"
+
+[[deps.MozillaCACerts_jll]]
+uuid = "14a3606d-f60d-562e-9121-12d972cd8159"
+version = "2022.10.11"
+
+[[deps.NetworkOptions]]
+uuid = "ca575930-c2e3-43a9-ace4-1e988b2c1908"
+version = "1.2.0"
+
+[[deps.OpenBLAS_jll]]
+deps = ["Artifacts", "CompilerSupportLibraries_jll", "Libdl"]
+uuid = "4536629a-c528-5b80-bd46-f80d51c5b363"
+version = "0.3.21+4"
+
+[[deps.OrderedCollections]]
+git-tree-sha1 = "2e73fe17cac3c62ad1aebe70d44c963c3cfdc3e3"
+uuid = "bac558e1-5e72-5ebc-8fee-abe8a469f55d"
+version = "1.6.2"
+
+[[deps.Parsers]]
+deps = ["Dates", "PrecompileTools", "UUIDs"]
+git-tree-sha1 = "716e24b21538abc91f6205fd1d8363f39b442851"
+uuid = "69de0a69-1ddd-5017-9359-2bf0b02dc9f0"
+version = "2.7.2"
+
+[[deps.Pidfile]]
+deps = ["FileWatching", "Test"]
+git-tree-sha1 = "2d8aaf8ee10df53d0dfb9b8ee44ae7c04ced2b03"
+uuid = "fa939f87-e72e-5be4-a000-7fc836dbe307"
+version = "1.3.0"
+
+[[deps.Pkg]]
+deps = ["Artifacts", "Dates", "Downloads", "FileWatching", "LibGit2", "Libdl", "Logging", "Markdown", "Printf", "REPL", "Random", "SHA", "Serialization", "TOML", "Tar", "UUIDs", "p7zip_jll"]
+uuid = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
+version = "1.9.2"
+
+[[deps.PrecompileTools]]
+deps = ["Preferences"]
+git-tree-sha1 = "03b4c25b43cb84cee5c90aa9b5ea0a78fd848d2f"
+uuid = "aea7be01-6a6a-4083-8856-8a6e6704d82a"
+version = "1.2.0"
+
+[[deps.Preferences]]
+deps = ["TOML"]
+git-tree-sha1 = "00805cd429dcb4870060ff49ef443486c262e38e"
+uuid = "21216c6a-2e73-6563-6e65-726566657250"
+version = "1.4.1"
+
+[[deps.Printf]]
+deps = ["Unicode"]
+uuid = "de0858da-6303-5e67-8744-51eddeeeb8d7"
+
+[[deps.PythonCall]]
+deps = ["CondaPkg", "Dates", "Libdl", "MacroTools", "Markdown", "Pkg", "REPL", "Requires", "Serialization", "Tables", "UnsafePointers"]
+git-tree-sha1 = "70af6bdbde63d7d0a4ea99f3e890ebdb55e9d464"
+uuid = "6099a3de-0909-46bc-b1f4-468b9a2dfc0d"
+version = "0.9.14"
+
+[[deps.REPL]]
+deps = ["InteractiveUtils", "Markdown", "Sockets", "Unicode"]
+uuid = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
+
+[[deps.Random]]
+deps = ["SHA", "Serialization"]
+uuid = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
+
+[[deps.Requires]]
+deps = ["UUIDs"]
+git-tree-sha1 = "838a3a4188e2ded87a4f9f184b4b0d78a1e91cb7"
+uuid = "ae029012-a4dd-5104-9daa-d747884805df"
+version = "1.3.0"
+
+[[deps.SHA]]
+uuid = "ea8e919c-243c-51af-8825-aaa63cd721ce"
+version = "0.7.0"
+
+[[deps.Scratch]]
+deps = ["Dates"]
+git-tree-sha1 = "30449ee12237627992a99d5e30ae63e4d78cd24a"
+uuid = "6c6a2e73-6563-6170-7368-637461726353"
+version = "1.2.0"
+
+[[deps.Serialization]]
+uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
+
+[[deps.Sockets]]
+uuid = "6462fe0b-24de-5631-8697-dd941f90decc"
+
+[[deps.StructTypes]]
+deps = ["Dates", "UUIDs"]
+git-tree-sha1 = "ca4bccb03acf9faaf4137a9abc1881ed1841aa70"
+uuid = "856f2bd8-1eba-4b0a-8007-ebc267875bd4"
+version = "1.10.0"
+
+[[deps.TOML]]
+deps = ["Dates"]
+uuid = "fa267f1f-6049-4f14-aa54-33bafae1ed76"
+version = "1.0.3"
+
+[[deps.TableTraits]]
+deps = ["IteratorInterfaceExtensions"]
+git-tree-sha1 = "c06b2f539df1c6efa794486abfb6ed2022561a39"
+uuid = "3783bdb8-4a98-5b6b-af9a-565f29a5fe9c"
+version = "1.0.1"
+
+[[deps.Tables]]
+deps = ["DataAPI", "DataValueInterfaces", "IteratorInterfaceExtensions", "LinearAlgebra", "OrderedCollections", "TableTraits"]
+git-tree-sha1 = "a1f34829d5ac0ef499f6d84428bd6b4c71f02ead"
+uuid = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
+version = "1.11.0"
+
+[[deps.Tar]]
+deps = ["ArgTools", "SHA"]
+uuid = "a4e569a6-e804-4fa4-b0f3-eef7a1d5b13e"
+version = "1.10.0"
+
+[[deps.Test]]
+deps = ["InteractiveUtils", "Logging", "Random", "Serialization"]
+uuid = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+
+[[deps.UUIDs]]
+deps = ["Random", "SHA"]
+uuid = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
+
+[[deps.Unicode]]
+uuid = "4ec0a83e-493e-50e2-b9ac-8f72acf5a8f5"
+
+[[deps.UnsafePointers]]
+git-tree-sha1 = "c81331b3b2e60a982be57c046ec91f599ede674a"
+uuid = "e17b2a0c-0bdf-430a-bd0c-3a23cae4ff39"
+version = "1.0.0"
+
+[[deps.Zlib_jll]]
+deps = ["Libdl"]
+uuid = "83775a58-1f1d-513f-b197-d71354ab007a"
+version = "1.2.13+0"
+
+[[deps.libblastrampoline_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "8e850b90-86db-534c-a0d3-1478176c7d93"
+version = "5.8.0+0"
+
+[[deps.micromamba_jll]]
+deps = ["Artifacts", "JLLWrappers", "LazyArtifacts", "Libdl"]
+git-tree-sha1 = "66d07957bcf7e4930d933195aed484078dd8cbb5"
+uuid = "f8abcde7-e9b7-5caa-b8af-a437887ae8e4"
+version = "1.4.9+0"
+
+[[deps.nghttp2_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "8e850ede-7688-5339-a07c-302acd2aaf8d"
+version = "1.48.0+0"
+
+[[deps.p7zip_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "3f19e933-33d8-53b3-aaab-bd5110c3b7a0"
+version = "17.4.0+0"
diff --git a/previousVersion/0.0.2/Project.toml b/previousVersion/0.0.2/Project.toml
new file mode 100644
index 0000000..71d8129
--- /dev/null
+++ b/previousVersion/0.0.2/Project.toml
@@ -0,0 +1,11 @@
+name = "ChatAgent"
+uuid = "cff63402-b71f-455f-804d-24489fc61e5e"
+authors = ["narawat <narawat@gmail.com>"]
+version = "0.1.0"
+
+[deps]
+CondaPkg = "992eb4ea-22a4-4c89-a5bb-47a3300528ab"
+DataStructures = "864edb3b-99cc-5e75-8d2d-829cb0a9cfe8"
+Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"
+JSON3 = "0f8b85d8-7281-11e9-16c2-39a750bddbf1"
+PythonCall = "6099a3de-0909-46bc-b1f4-468b9a2dfc0d"
diff --git a/previousVersion/0.0.2/src/ChatAgent.jl b/previousVersion/0.0.2/src/ChatAgent.jl
new file mode 100644
index 0000000..bcc89f3
--- /dev/null
+++ b/previousVersion/0.0.2/src/ChatAgent.jl
@@ -0,0 +1,92 @@
+module ChatAgent
+
+  # export agent, addNewMessage, clearMessage
+
+
+  """ Order by dependencies of each file. The 1st included file must not depend on any other
+  files and each file can only depend on the file included before it. 
+  """
+
+  include("interface.jl")
+  using .interface
+  
+  
+  #------------------------------------------------------------------------------------------------100
+  
+  """ version 0.0.1
+      Todo:
+          [] add chat mechanism
+  
+      Change from version: 0.0.0
+          - 
+  
+  """
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+end # module ChatAgent
diff --git a/previousVersion/0.0.2/src/interface.jl b/previousVersion/0.0.2/src/interface.jl
new file mode 100644
index 0000000..fd1ab2f
--- /dev/null
+++ b/previousVersion/0.0.2/src/interface.jl
@@ -0,0 +1,214 @@
+module interface
+    
+
+export agent, addNewMessage, clearMessage, removeLatestMsg, generatePrompt_tokenPrefix,
+        generatePrompt_tokenSuffix
+
+using JSON3, DataStructures, Dates, PythonCall
+
+const py_agents = PythonCall.pynew()
+const py_llms = PythonCall.pynew()
+function __init__()
+    # PythonCall.pycopy!(py_cv2, pyimport("cv2"))
+
+    # equivalent to     from urllib.request import urlopen    in python
+    PythonCall.pycopy!(py_agents, pyimport("langchain.agents"))
+    PythonCall.pycopy!(py_llms, pyimport("langchain.llms"))
+end
+
+#------------------------------------------------------------------------------------------------100
+
+
+
+@kwdef mutable struct agent
+    availableRole=["system", "user", "assistant"]
+    maxUserMsg::Int= 10
+    llmAIRequestTopic_openblas = "llm/openblas/request"
+    llmAIRequestTopic_gpu = "llm/api/v0.0.1/gpu/request"
+    self_llmReceiveTopic = "chatbothub/llm/respond"
+
+    """ Dict(Role=> Content)  ;   Role can be system, user, assistant
+      Example:
+        messages=[
+              Dict(:role=>"system", :content=> "You are a helpful assistant."),
+              Dict(:role=>"assistant", :content=> "How may I help you"),
+              Dict(:role=>"user", :content=> "Hello, how are you"),
+              ]
+    """
+    # Ref: https://huggingface.co/TheBloke/Llama-2-7B-Chat-GGML/discussions/3
+    # 
+    messages=[Dict(:role=>"system", :content=> "You are a helpful assistant.", :timestamp=> Dates.now()),]
+end
+
+@kwdef mutable struct agentLangchain
+  availableRole=["system", "user", "assistant"]
+  maxUserMsg::Int= 10
+  llmAIRequestTopic_openblas = "llm/openblas/request"
+  llmAIRequestTopic_gpu = "llm/api/v0.0.1/gpu/request"
+  self_llmReceiveTopic = "chatbothub/llm/respond"
+
+  """ Dict(Role=> Content)  ;   Role can be system, user, assistant
+    Example:
+      messages=[
+            Dict(:role=>"system", :content=> "You are a helpful assistant."),
+            Dict(:role=>"assistant", :content=> "How may I help you"),
+            Dict(:role=>"user", :content=> "Hello, how are you"),
+            ]
+  """
+  # Ref: https://huggingface.co/TheBloke/Llama-2-7B-Chat-GGML/discussions/3
+  # 
+  messages=[Dict(:role=>"system", :content=> "You are a helpful assistant.", :timestamp=> Dates.now()),]
+end
+
+""" 
+  add new message to agent
+# Example
+```jldoctest
+julia> addNewMessage(agent1, "user", "Where should I go to buy snacks")
+````
+"""
+function addNewMessage(a::agent, role::String, content::String)
+  if role ∉ a.availableRole   # guard against typo
+    error("role is not in agent.availableRole")
+  end
+
+  # check whether user messages exceed limit
+  userMsg = 0
+  for i in a.messages
+    if i[:role] == "user"
+      userMsg += 1
+    end
+  end
+  messageleft = 0
+
+  if userMsg > a.maxUserMsg # delete all conversation
+    clearMessage(a)
+    messageleft = a.maxUserMsg
+  else
+    userMsg += 1
+    d = Dict(:role=> role, :content=> content, :timestamp=> Dates.now())
+    push!(a.messages, d)
+    messageleft = a.maxUserMsg - userMsg
+  end
+
+  return messageleft
+end
+
+
+function clearMessage(a::agent)
+  for i in eachindex(a.messages)
+    if length(a.messages) > 1 # system instruction will NOT be deleted
+      pop!(a.messages)
+    else
+      break
+    end
+  end
+end
+
+function removeLatestMsg(a::agent)
+  if length(a.messages) > 1
+    pop!(a.messages)
+  end
+end
+
+function generatePrompt_tokenSuffix(a::agent; 
+                      userToken::String="[/INST]", assistantToken="[INST]", 
+                      systemToken="[INST]<<SYS>> content <</SYS>>")
+  prompt = nothing
+  for msg in a.messages
+    role = msg[:role]
+    content = msg[:content]
+
+    if role == "system"
+      prompt = replace(systemToken, "content" => content) * " "
+    elseif role == "user"
+      prompt *= " " * content * " " * userToken
+    elseif role == "assistant"
+      prompt *= " " * content * " " * assistantToken
+    else
+      error("undefied condition role = $role")
+    end
+  end
+
+  return prompt
+end
+
+function generatePrompt_tokenPrefix(a::agent; 
+                      userToken::String="Q:", assistantToken="A:", 
+                      systemToken="[INST]<<SYS>> content <</SYS>>")
+  prompt = nothing
+  for msg in a.messages
+    role = msg[:role]
+    content = msg[:content]
+
+    if role == "system"
+      prompt = replace(systemToken, "content" => content) * " "
+    elseif role == "user"
+      prompt *= userToken * " " * content * " "
+    elseif role == "assistant"
+      prompt *= assistantToken * " " * content * " "
+    else
+      error("undefied condition role = $role")
+    end
+  end
+
+  return prompt
+end
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+end # module
\ No newline at end of file
diff --git a/src/interface.jl b/src/interface.jl
index fd1ab2f..01eebe5 100644
--- a/src/interface.jl
+++ b/src/interface.jl
@@ -4,8 +4,13 @@ module interface
 export agent, addNewMessage, clearMessage, removeLatestMsg, generatePrompt_tokenPrefix,
         generatePrompt_tokenSuffix
 
-using JSON3, DataStructures, Dates, PythonCall
+using JSON3, DataStructures, Dates
 
+# Ref: https://github.com/JuliaPy/PythonCall.jl/issues/252
+ENV["JULIA_CONDAPKG_BACKEND"] = "Null"
+systemPython = split(read(`which python`, String), "\n")[1]
+ENV["JULIA_PYTHONCALL_EXE"] = systemPython # find python location with $> which python  ex. raw"/root/conda/bin/python"
+using PythonCall
 const py_agents = PythonCall.pynew()
 const py_llms = PythonCall.pynew()
 function __init__()