diff --git a/.gitignore b/.gitignore
index 5487fed..22de1c3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -448,4 +448,6 @@ $RECYCLE.BIN/
 # Windows shortcuts
 *.lnk
 
+.theflow/
+
 # End of https://www.toptal.com/developers/gitignore/api/python,linux,macos,windows,vim,emacs,visualstudiocode,pycharm
diff --git a/README.md b/README.md
index 55b8e7a..a79c399 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,31 @@
-Modules:
+# kotaemon
+
+Quick and easy AI components to build Kotaemon - applicable in client
+project.
+
+## Install
+
+```shell
+pip install kotaemon@git+ssh://git@github.com/Cinnamon/kotaemon.git
+```
+
+## Contribute
+
+### Setup
+
+```shell
+# Create conda environment (suggest 3.10)
+conda create -n kotaemon python=3.10
+conda activate kotaemon
+
+# Install all
+pip install -e ".[dev]"
+
+# Test
+pytest tests
+```
+
+### Code base structure
+
 - documents: define document
 - loaders
diff --git a/knowledgehub/__init__.py b/knowledgehub/__init__.py
index 00e571b..e1eac21 100644
--- a/knowledgehub/__init__.py
+++ b/knowledgehub/__init__.py
@@ -22,4 +22,4 @@ try:
 except ImportError:
     pass
 
-__version__ = "0.0.1"
+__version__ = "0.0.2"
diff --git a/knowledgehub/components.py b/knowledgehub/components.py
new file mode 100644
index 0000000..bccba58
--- /dev/null
+++ b/knowledgehub/components.py
@@ -0,0 +1,56 @@
+from abc import abstractmethod
+
+from theflow.base import Composable
+
+
+class BaseComponent(Composable):
+    """Base class for component
+
+    A component is a class that can be used to compose a pipeline. To use the
+    component, you should implement the following methods:
+        - run_raw: run on raw input
+        - run_batch_raw: run on batch of raw input
+        - run_document: run on document
+        - run_batch_document: run on batch of documents
+        - is_document: check if input is document
+        - is_batch: check if input is batch
+    """
+
+    @abstractmethod
+    def run_raw(self, *args, **kwargs):
+        ...
+
+    @abstractmethod
+    def run_batch_raw(self, *args, **kwargs):
+        ...
+
+    @abstractmethod
+    def run_document(self, *args, **kwargs):
+        ...
+
+    @abstractmethod
+    def run_batch_document(self, *args, **kwargs):
+        ...
+
+    @abstractmethod
+    def is_document(self, *args, **kwargs) -> bool:
+        ...
+
+    @abstractmethod
+    def is_batch(self, *args, **kwargs) -> bool:
+        ...
+
+    def run(self, *args, **kwargs):
+        """Run the component."""
+
+        is_document = self.is_document(*args, **kwargs)
+        is_batch = self.is_batch(*args, **kwargs)
+
+        if is_document and is_batch:
+            return self.run_batch_document(*args, **kwargs)
+        elif is_document and not is_batch:
+            return self.run_document(*args, **kwargs)
+        elif not is_document and is_batch:
+            return self.run_batch_raw(*args, **kwargs)
+        else:
+            return self.run_raw(*args, **kwargs)
diff --git a/knowledgehub/llms/__init__.py b/knowledgehub/llms/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/knowledgehub/llms/base.py b/knowledgehub/llms/base.py
new file mode 100644
index 0000000..85ea0b9
--- /dev/null
+++ b/knowledgehub/llms/base.py
@@ -0,0 +1,24 @@
+from dataclasses import dataclass, field
+
+from ..components import BaseComponent
+
+
+@dataclass
+class LLMInterface:
+    text: list[str]
+    completion_tokens: int = -1
+    total_tokens: int = -1
+    prompt_tokens: int = -1
+    logits: list[list[float]] = field(default_factory=list)
+
+
+class PromptTemplate(BaseComponent):
+    pass
+
+
+class Extract(BaseComponent):
+    pass
+
+
+class PromptNode(BaseComponent):
+    pass
diff --git a/knowledgehub/llms/chats/__init__.py b/knowledgehub/llms/chats/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/knowledgehub/llms/chats/base.py b/knowledgehub/llms/chats/base.py
new file mode 100644
index 0000000..ea1aa26
--- /dev/null
+++ b/knowledgehub/llms/chats/base.py
@@ -0,0 +1,85 @@
+from typing import Type, TypeVar
+
+from theflow.base import Param
+from langchain.schema.language_model import BaseLanguageModel
+
+from langchain.schema.messages import (
+    BaseMessage,
+    HumanMessage,
+)
+
+from ...components import BaseComponent
+from ..base import LLMInterface
+
+
+Message = TypeVar("Message", bound=BaseMessage)
+
+
+class ChatLLM(BaseComponent):
+    ...
+
+
+class LangchainChatLLM(ChatLLM):
+    _lc_class: Type[BaseLanguageModel]
+
+    def __init__(self, **params):
+        if self._lc_class is None:
+            raise AttributeError(
+                "Should set _lc_class attribute to the LLM class from Langchain "
+                "if using LLM from Langchain"
+            )
+
+        self._kwargs: dict = {}
+        for param in list(params.keys()):
+            if param in self._lc_class.__fields__:
+                self._kwargs[param] = params.pop(param)
+        super().__init__(**params)
+
+    @Param.decorate()
+    def agent(self):
+        return self._lc_class(**self._kwargs)
+
+    def run_raw(self, text: str) -> LLMInterface:
+        message = HumanMessage(content=text)
+        return self.run_document([message])
+
+    def run_batch_raw(self, text: list[str]) -> list[LLMInterface]:
+        inputs = [[HumanMessage(content=each)] for each in text]
+        return self.run_batch_document(inputs)
+
+    def run_document(self, text: list[Message]) -> LLMInterface:
+        pred = self.agent.generate([text])
+        return LLMInterface(
+            text=[each.text for each in pred.generations[0]],
+            completion_tokens=pred.llm_output["token_usage"]["completion_tokens"],
+            total_tokens=pred.llm_output["token_usage"]["total_tokens"],
+            prompt_tokens=pred.llm_output["token_usage"]["prompt_tokens"],
+            logits=[],
+        )
+
+    def run_batch_document(self, text: list[list[Message]]) -> list[LLMInterface]:
+        outputs = []
+        for each_text in text:
+            outputs.append(self.run_document(each_text))
+        return outputs
+
+    def is_document(self, text) -> bool:
+        if isinstance(text, str):
+            return False
+        elif isinstance(text, list) and isinstance(text[0], str):
+            return False
+        return True
+
+    def is_batch(self, text) -> bool:
+        if isinstance(text, str):
+            return False
+        elif isinstance(text, list):
+            if isinstance(text[0], BaseMessage):
+                return False
+        return True
+
+    def __setattr__(self, name, value):
+        if name in self._lc_class.__fields__:
+            setattr(self.agent, name, value)
+        else:
+            super().__setattr__(name, value)
diff --git a/knowledgehub/llms/chats/openai.py b/knowledgehub/llms/chats/openai.py
new file mode 100644
index 0000000..2d0ec52
--- /dev/null
+++ b/knowledgehub/llms/chats/openai.py
@@ -0,0 +1,7 @@
+from langchain.chat_models import AzureChatOpenAI as AzureChatOpenAILC
+
+from .base import LangchainChatLLM
+
+
+class AzureChatOpenAI(LangchainChatLLM):
+    _lc_class = AzureChatOpenAILC
diff --git a/knowledgehub/llms/completions/__init__.py b/knowledgehub/llms/completions/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/knowledgehub/llms/completions/base.py b/knowledgehub/llms/completions/base.py
new file mode 100644
index 0000000..2409c91
--- /dev/null
+++ b/knowledgehub/llms/completions/base.py
@@ -0,0 +1,70 @@
+from typing import Type
+
+from theflow.base import Param
+from langchain.schema.language_model import BaseLanguageModel
+
+from ...components import BaseComponent
+from ..base import LLMInterface
+
+
+class LLM(BaseComponent):
+    pass
+
+
+class LangchainLLM(LLM):
+    _lc_class: Type[BaseLanguageModel]
+
+    def __init__(self, **params):
+        if self._lc_class is None:
+            raise AttributeError(
+                "Should set _lc_class attribute to the LLM class from Langchain "
+                "if using LLM from Langchain"
+            )
+
+        self._kwargs: dict = {}
+        for param in list(params.keys()):
+            if param in self._lc_class.__fields__:
+                self._kwargs[param] = params.pop(param)
+        super().__init__(**params)
+
+    @Param.decorate()
+    def agent(self):
+        return self._lc_class(**self._kwargs)
+
+    def run_raw(self, text: str) -> LLMInterface:
+        pred = self.agent.generate([text])
+        return LLMInterface(
+            text=[each.text for each in pred.generations[0]],
+            completion_tokens=pred.llm_output["token_usage"]["completion_tokens"],
+            total_tokens=pred.llm_output["token_usage"]["total_tokens"],
+            prompt_tokens=pred.llm_output["token_usage"]["prompt_tokens"],
+            logits=[],
+        )
+
+    def run_batch_raw(self, text: list[str]) -> list[LLMInterface]:
+        outputs = []
+        for each_text in text:
+            outputs.append(self.run_raw(each_text))
+        return outputs
+
+    def run_document(self, text: str) -> LLMInterface:
+        return self.run_raw(text)
+
+    def run_batch_document(self, text: list[str]) -> list[LLMInterface]:
+        return self.run_batch_raw(text)
+
+    def is_document(self, text) -> bool:
+        return False
+
+    def is_batch(self, text) -> bool:
+        return False if isinstance(text, str) else True
+
+    def __setattr__(self, name, value):
+        if name in self._lc_class.__fields__:
+            setattr(self.agent, name, value)
+        else:
+            super().__setattr__(name, value)
+
+
+class LLMChat(BaseComponent):
+    pass
diff --git a/knowledgehub/llms/completions/openai.py b/knowledgehub/llms/completions/openai.py
new file mode 100644
index 0000000..a510e27
--- /dev/null
+++ b/knowledgehub/llms/completions/openai.py
@@ -0,0 +1,13 @@
+import langchain.llms as langchain_llms
+
+from .base import LangchainLLM
+
+
+class OpenAI(LangchainLLM):
+    """Wrapper around Langchain's OpenAI class"""
+    _lc_class = langchain_llms.OpenAI
+
+
+class AzureOpenAI(LangchainLLM):
+    """Wrapper around Langchain's AzureOpenAI class"""
+    _lc_class = langchain_llms.AzureOpenAI
diff --git a/setup.py b/setup.py
index c35a4f9..39ed677 100644
--- a/setup.py
+++ b/setup.py
@@ -28,17 +28,23 @@ setuptools.setup(
     url="https://github.com/Cinnamon/kotaemon/",
     packages=setuptools.find_packages(exclude=("tests", "tests.*")),
     install_requires=[
-        "farm-haystack"
+        "farm-haystack==1.19.0",
+        "langchain",
+        "theflow",
     ],
     extras_require={
         "dev": [
+            "ipython",
             "pytest",
             "pre-commit",
             "black",
             "flake8",
             "sphinx",
             "coverage",
-        ]
+
+            # optional dependency needed for test
+            "openai"
+        ],
     },
     entry_points={"console_scripts": ["kh=kotaemon.cli:main"]},
     python_requires=">=3",
diff --git a/tests/test_llms_chat_models.py b/tests/test_llms_chat_models.py
new file mode 100644
index 0000000..aba8e8e
--- /dev/null
+++ b/tests/test_llms_chat_models.py
@@ -0,0 +1,78 @@
+from unittest.mock import patch
+
+from langchain.chat_models import AzureChatOpenAI as AzureChatOpenAILC
+from langchain.schema.messages import (
+    SystemMessage,
+    HumanMessage,
+    AIMessage,
+)
+
+from kotaemon.llms.chats.openai import AzureChatOpenAI
+from kotaemon.llms.base import LLMInterface
+
+
+_openai_chat_completion_response = {
+    "id": "chatcmpl-7qyuw6Q1CFCpcKsMdFkmUPUa7JP2x",
+    "object": "chat.completion",
+    "created": 1692338378,
+    "model": "gpt-35-turbo",
+    "choices": [
+        {
+            "index": 0,
+            "finish_reason": "stop",
+            "message": {
+                "role": "assistant",
+                "content": "Hello! How can I assist you today?",
+            },
+        }
+    ],
+    "usage": {"completion_tokens": 9, "prompt_tokens": 10, "total_tokens": 19},
+}
+
+
+@patch(
+    "openai.api_resources.chat_completion.ChatCompletion.create",
+    side_effect=lambda *args, **kwargs: _openai_chat_completion_response,
+)
+def test_azureopenai_model(openai_completion):
+    model = AzureChatOpenAI(
+        openai_api_base="https://test.openai.azure.com/",
+        openai_api_key="some-key",
+        openai_api_version="2023-03-15-preview",
+        deployment_name="gpt35turbo",
+        temperature=0,
+        request_timeout=60,
+    )
+    assert isinstance(
+        model.agent, AzureChatOpenAILC
+    ), "Agent not wrapped in Langchain's AzureChatOpenAI"
+
+    # test for str input - stream mode
+    output = model("hello world")
+    assert isinstance(output, LLMInterface), "Output for single text is not LLMInterface"
+    openai_completion.assert_called()
+
+    # test for list[str] input - batch mode
+    output = model(["hello world"])
+    assert isinstance(output, list), "Output for batch string is not a list"
+    assert isinstance(output[0], LLMInterface), "Output for text is not LLMInterface"
+    openai_completion.assert_called()
+
+    # test for list[message] input - stream mode
+    messages = [
+        SystemMessage(content="You are a philosohper"),
+        HumanMessage(content="What is the meaning of life"),
+        AIMessage(content="42"),
+        HumanMessage(content="What is the meaning of 42"),
+    ]
+
+    output = model(messages)
+    assert isinstance(output, LLMInterface), "Output for single text is not LLMInterface"
+    openai_completion.assert_called()
+
+    # test for list[list[message]] input - batch mode
+    output = model([messages])
+    assert isinstance(output, list), "Output for batch string is not a list"
+    assert isinstance(output[0], LLMInterface), "Output for text is not LLMInterface"
+    openai_completion.assert_called()
+
diff --git a/tests/test_llms_completion_models.py b/tests/test_llms_completion_models.py
new file mode 100644
index 0000000..99a354e
--- /dev/null
+++ b/tests/test_llms_completion_models.py
@@ -0,0 +1,70 @@
+from unittest.mock import patch
+
+from langchain.llms import AzureOpenAI as AzureOpenAILC, OpenAI as OpenAILC
+
+from kotaemon.llms.completions.openai import AzureOpenAI, OpenAI
+from kotaemon.llms.base import LLMInterface
+
+
+_openai_completion_response = {
+    "id": "cmpl-7qyNoIo6gRSCJR0hi8o3ZKBH4RkJ0",
+    "object": "sample text_completion",
+    "created": 1392751226,
+    "model": "gpt-35-turbo",
+    "choices": [
+        {"text": "completion", "index": 0, "finish_reason": "length", "logprobs": None}
+    ],
+    "usage": {"completion_tokens": 20, "prompt_tokens": 2, "total_tokens": 22},
+}
+
+
+@patch(
+    "openai.api_resources.completion.Completion.create",
+    side_effect=lambda *args, **kwargs: _openai_completion_response,
+)
+def test_azureopenai_model(openai_completion):
+    model = AzureOpenAI(
+        openai_api_base="https://test.openai.azure.com/",
+        openai_api_key="some-key",
+        openai_api_version="2023-03-15-preview",
+        deployment_name="gpt35turbo",
+        temperature=0,
+        request_timeout=60,
+    )
+    assert isinstance(
+        model.agent, AzureOpenAILC
+    ), "Agent not wrapped in Langchain's AzureOpenAI"
+
+    output = model(["hello world"])
+    assert isinstance(output, list), "Output for batch is not a list"
+    assert isinstance(output[0], LLMInterface), "Output for text is not LLMInterface"
+    openai_completion.assert_called()
+
+    output = model("hello world")
+    assert isinstance(output, LLMInterface), "Output for single text is not LLMInterface"
+
+
+@patch(
+    "openai.api_resources.completion.Completion.create",
+    side_effect=lambda *args, **kwargs: _openai_completion_response,
+)
+def test_openai_model(openai_completion):
+    model = OpenAI(
+        openai_api_base="https://test.openai.azure.com/",
+        openai_api_key="some-key",
+        openai_api_version="2023-03-15-preview",
+        deployment_name="gpt35turbo",
+        temperature=0,
+        request_timeout=60,
+    )
+    assert isinstance(
+        model.agent, OpenAILC
+    ), "Agent is not wrapped in Langchain's OpenAI"
+
+    output = model(["hello world"])
+    assert isinstance(output, list), "Output for batch is not a list"
+    assert isinstance(output[0], LLMInterface), "Output for text is not LLMInterface"
+    openai_completion.assert_called()
+
+    output = model("hello world")
+    assert isinstance(output, LLMInterface), "Output for single text is not LLMInterface"
diff --git a/tests/test_telemetry.py b/tests/test_telemetry.py
index 349facd..59b184f 100644
--- a/tests/test_telemetry.py
+++ b/tests/test_telemetry.py
@@ -1,3 +1,31 @@
+import os
+import sys
+
+import pytest
+
+
+@pytest.fixture
+def clean_artifacts_for_telemetry():
+    try:
+        del sys.modules["kotaemon"]
+    except KeyError:
+        pass
+
+    try:
+        del sys.modules["haystack"]
+    except KeyError:
+        pass
+
+    try:
+        del sys.modules["haystack.telemetry"]
+    except KeyError:
+        pass
+
+    if "HAYSTACK_TELEMETRY_ENABLED" in os.environ:
+        del os.environ["HAYSTACK_TELEMETRY_ENABLED"]
+
+
+@pytest.mark.usefixtures("clean_artifacts_for_telemetry")
 def test_disable_telemetry_import_haystack_first():
     """Test that telemetry is disabled when kotaemon lib is initiated after"""
     import os
@@ -10,6 +38,7 @@ def test_disable_telemetry_import_haystack_first():
     assert os.environ.get("HAYSTACK_TELEMETRY_ENABLED", "True") == "False"
 
 
+@pytest.mark.usefixtures("clean_artifacts_for_telemetry")
 def test_disable_telemetry_import_haystack_after_kotaemon():
     """Test that telemetry is disabled when kotaemon lib is initiated before"""
     import os