diff --git a/cookbook/pocketflow-chain-of-thought/README.md b/cookbook/pocketflow-chain-of-thought/README.md
new file mode 100644
index 0000000..46bc250
--- /dev/null
+++ b/cookbook/pocketflow-chain-of-thought/README.md
@@ -0,0 +1,7 @@
+# Chain-of-Thought
+
+The simplest implementation is to tell the AI to "think step by step" or to provide examples of step-by-step reasoning in the prompt. This guides the AI to break down its thinking.
+
+Further more thinking models like  sonnet 3.7, O1 natively support.
+
+However, we can also simulate without thinking model.
\ No newline at end of file
diff --git a/cookbook/pocketflow-llm-streaming/main.py b/cookbook/pocketflow-llm-streaming/main.py
index 3885b75..532d6b2 100644
--- a/cookbook/pocketflow-llm-streaming/main.py
+++ b/cookbook/pocketflow-llm-streaming/main.py
@@ -4,9 +4,6 @@ from pocketflow import Node, Flow
 from utils import fake_stream_llm, stream_llm
 
 class StreamNode(Node):
-    def __init__(self, max_retries=1, wait=0):
-        super().__init__(max_retries=max_retries, wait=wait)
-
     def prep(self, shared):
         # Create interrupt event
         interrupt_event = threading.Event()
diff --git a/cookbook/pocketflow-parallel-batch/README.md b/cookbook/pocketflow-parallel-batch/README.md
index 7082b59..f317a03 100644
--- a/cookbook/pocketflow-parallel-batch/README.md
+++ b/cookbook/pocketflow-parallel-batch/README.md
@@ -38,4 +38,15 @@ Parallel took:   1.00 seconds
   - Good for: Rate-limited APIs, maintaining order
 
 - **Parallel**: Total time ≈ longest single item time
-  - Good for: I/O-bound tasks, independent operations 
\ No newline at end of file
+  - Good for: I/O-bound tasks, independent operations 
+
+## Tech Dive Deep
+
+- **Python's GIL** prevents true CPU-bound parallelism, but LLM calls are I/O-bound
+- **Async/await** overlaps waiting time between requests
+  - Example: `await client.chat.completions.create(...)`
+  - See: [OpenAI's async usage](https://github.com/openai/openai-python?tab=readme-ov-file#async-usage)
+
+For maximum performance and cost efficiency, consider using batch APIs:
+- [OpenAI's Batch API](https://platform.openai.com/docs/guides/batch) lets you process multiple prompts in a single request
+- Reduces overhead and can be more cost-effective for large workloads 
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diff --git a/cookbook/pocketflow-supervisor/README.md b/cookbook/pocketflow-supervisor/README.md
new file mode 100644
index 0000000..90acac1
--- /dev/null
+++ b/cookbook/pocketflow-supervisor/README.md
@@ -0,0 +1,58 @@
+# PocketFlow Research Agent - Tutorial for Dummy
+
+This project demonstrates a simple yet powerful LLM-powered research agent built with PocketFlow, a minimalist LLM framework in just 100 lines of code! This implementation is based directly on the tutorial post [LLM Agents are simply Graph — Tutorial For Dummies](https://zacharyhuang.substack.com/p/llm-agent-internal-as-a-graph-tutorial).
+
+## Getting Started
+
+1. Install the packages you need with this simple command:
+```bash
+pip install -r requirements.txt
+```
+
+2. Let's get your OpenAI API key ready:
+
+```bash
+export OPENAI_API_KEY="your-api-key-here"
+```
+
+3. Let's do a quick check to make sure your API key is working properly:
+
+```bash
+python utils.py
+```
+
+This will test both the LLM call and web search features. If you see responses, you're good to go!
+
+4. Try out the agent with the default question (about Nobel Prize winners):
+
+```bash
+python main.py
+```
+
+5. Got a burning question? Ask anything you want by using the `--` prefix:
+
+```bash
+python main.py --"What is quantum computing?"
+```
+
+## How It Works?
+
+The magic happens through a simple but powerful graph structure with three main parts:
+
+```mermaid
+graph TD
+    A[DecideAction] -->|"search"| B[SearchWeb]
+    A -->|"answer"| C[AnswerQuestion]
+    B -->|"decide"| A
+```
+
+Here's what each part does:
+1. **DecideAction**: The brain that figures out whether to search or answer
+2. **SearchWeb**: The researcher that goes out and finds information
+3. **AnswerQuestion**: The writer that crafts the final answer
+
+Here's what's in each file:
+- [`main.py`](./main.py): The starting point - runs the whole show!
+- [`flow.py`](./flow.py): Connects everything together into a smart agent
+- [`nodes.py`](./nodes.py): The building blocks that make decisions and take actions
+- [`utils.py`](./utils.py): Helper functions for talking to the LLM and searching the web
diff --git a/cookbook/pocketflow-supervisor/flow.py b/cookbook/pocketflow-supervisor/flow.py
new file mode 100644
index 0000000..2e5bf92
--- /dev/null
+++ b/cookbook/pocketflow-supervisor/flow.py
@@ -0,0 +1,33 @@
+from pocketflow import Flow
+from nodes import DecideAction, SearchWeb, UnreliableAnswerNode
+
+def create_agent_flow():
+    """
+    Create and connect the nodes to form a complete agent flow.
+    
+    The flow works like this:
+    1. DecideAction node decides whether to search or answer
+    2. If search, go to SearchWeb node
+    3. If answer, go to UnreliableAnswerNode (which has a 50% chance of giving nonsense answers)
+    4. After SearchWeb completes, go back to DecideAction
+    
+    Returns:
+        Flow: A complete research agent flow with unreliable answering capability
+    """
+    # Create instances of each node
+    decide = DecideAction()
+    search = SearchWeb()
+    answer = UnreliableAnswerNode()
+    
+    # Connect the nodes
+    # If DecideAction returns "search", go to SearchWeb
+    decide - "search" >> search
+    
+    # If DecideAction returns "answer", go to UnreliableAnswerNode
+    decide - "answer" >> answer
+    
+    # After SearchWeb completes and returns "decide", go back to DecideAction
+    search - "decide" >> decide
+    
+    # Create and return the flow, starting with the DecideAction node
+    return Flow(start=decide) 
\ No newline at end of file
diff --git a/cookbook/pocketflow-supervisor/main.py b/cookbook/pocketflow-supervisor/main.py
new file mode 100644
index 0000000..4d2cbc4
--- /dev/null
+++ b/cookbook/pocketflow-supervisor/main.py
@@ -0,0 +1,27 @@
+import sys
+from flow import create_agent_flow
+
+def main():
+    """Simple function to process a question."""
+    # Default question
+    default_question = "Who won the Nobel Prize in Physics 2024?"
+    
+    # Get question from command line if provided with --
+    question = default_question
+    for arg in sys.argv[1:]:
+        if arg.startswith("--"):
+            question = arg[2:]
+            break
+    
+    # Create the agent flow
+    agent_flow = create_agent_flow()
+    
+    # Process the question
+    shared = {"question": question}
+    print(f"🤔 Processing question: {question}")
+    agent_flow.run(shared)
+    print("\n🎯 Final Answer:")
+    print(shared.get("answer", "No answer found"))
+
+if __name__ == "__main__":
+    main()
\ No newline at end of file
diff --git a/cookbook/pocketflow-supervisor/nodes.py b/cookbook/pocketflow-supervisor/nodes.py
new file mode 100644
index 0000000..1aff36f
--- /dev/null
+++ b/cookbook/pocketflow-supervisor/nodes.py
@@ -0,0 +1,134 @@
+from pocketflow import Node
+from utils import call_llm, search_web
+import yaml
+import random
+
+class DecideAction(Node):
+    def prep(self, shared):
+        """Prepare the context and question for the decision-making process."""
+        # Get the current context (default to "No previous search" if none exists)
+        context = shared.get("context", "No previous search")
+        # Get the question from the shared store
+        question = shared["question"]
+        # Return both for the exec step
+        return question, context
+        
+    def exec(self, inputs):
+        """Call the LLM to decide whether to search or answer."""
+        question, context = inputs
+        
+        print(f"🤔 Agent deciding what to do next...")
+        
+        # Create a prompt to help the LLM decide what to do next
+        prompt = f"""
+### CONTEXT
+You are a research assistant that can search the web.
+Question: {question}
+Previous Research: {context}
+
+### ACTION SPACE
+[1] search
+  Description: Look up more information on the web
+  Parameters:
+    - query (str): What to search for
+
+[2] answer
+  Description: Answer the question with current knowledge
+  Parameters:
+    - answer (str): Final answer to the question
+
+## NEXT ACTION
+Decide the next action based on the context and available actions.
+Return your response in this format:
+
+```yaml
+thinking: |
+    <your step-by-step reasoning process>
+action: search OR answer
+reason: <why you chose this action>
+search_query: <specific search query if action is search>
+```"""
+        
+        # Call the LLM to make a decision
+        response = call_llm(prompt)
+        
+        # Parse the response to get the decision
+        yaml_str = response.split("```yaml")[1].split("```")[0].strip()
+        decision = yaml.safe_load(yaml_str)
+        
+        return decision
+    
+    def post(self, shared, prep_res, exec_res):
+        """Save the decision and determine the next step in the flow."""
+        # If LLM decided to search, save the search query
+        if exec_res["action"] == "search":
+            shared["search_query"] = exec_res["search_query"]
+            print(f"🔍 Agent decided to search for: {exec_res['search_query']}")
+        else:
+            print(f"💡 Agent decided to answer the question")
+        
+        # Return the action to determine the next node in the flow
+        return exec_res["action"]
+
+class SearchWeb(Node):
+    def prep(self, shared):
+        """Get the search query from the shared store."""
+        return shared["search_query"]
+        
+    def exec(self, search_query):
+        """Search the web for the given query."""
+        # Call the search utility function
+        print(f"🌐 Searching the web for: {search_query}")
+        results = search_web(search_query)
+        return results
+    
+    def post(self, shared, prep_res, exec_res):
+        """Save the search results and go back to the decision node."""
+        # Add the search results to the context in the shared store
+        previous = shared.get("context", "")
+        shared["context"] = previous + "\n\nSEARCH: " + shared["search_query"] + "\nRESULTS: " + exec_res
+        
+        print(f"📚 Found information, analyzing results...")
+        
+        # Always go back to the decision node after searching
+        return "decide"
+
+class UnreliableAnswerNode(Node):
+    def prep(self, shared):
+        """Get the question and context for answering."""
+        return shared["question"], shared.get("context", "")
+        
+    def exec(self, inputs):
+        """Call the LLM to generate a final answer with 50% chance of returning a dummy answer."""
+        question, context = inputs
+        
+        # 50% chance to return a dummy answer
+        if random.random() < 0.5:
+            print(f"🤪 Generating unreliable dummy answer...")
+            return "Sorry, I'm on a coffee break right now. All information I provide is completely made up anyway. The answer to your question is 42, or maybe purple unicorns. Who knows? Certainly not me!"
+        
+        print(f"✍️ Crafting final answer...")
+        
+        # Create a prompt for the LLM to answer the question
+        prompt = f"""
+### CONTEXT
+Based on the following information, answer the question.
+Question: {question}
+Research: {context}
+
+## YOUR ANSWER:
+Provide a comprehensive answer using the research results.
+"""
+        # Call the LLM to generate an answer
+        answer = call_llm(prompt)
+        return answer
+    
+    def post(self, shared, prep_res, exec_res):
+        """Save the final answer and complete the flow."""
+        # Save the answer in the shared store
+        shared["answer"] = exec_res
+        
+        print(f"✅ Answer generated successfully")
+        
+        # We're done - no need to continue the flow
+        return "done" 
\ No newline at end of file
diff --git a/cookbook/pocketflow-supervisor/requirements.txt b/cookbook/pocketflow-supervisor/requirements.txt
new file mode 100644
index 0000000..38d5c4c
--- /dev/null
+++ b/cookbook/pocketflow-supervisor/requirements.txt
@@ -0,0 +1,4 @@
+pocketflow>=0.0.1
+aiohttp>=3.8.0  # For async HTTP requests
+openai>=1.0.0   # For async LLM calls 
+duckduckgo-search>=7.5.2    # For web search
\ No newline at end of file
diff --git a/cookbook/pocketflow-supervisor/utils.py b/cookbook/pocketflow-supervisor/utils.py
new file mode 100644
index 0000000..c56a175
--- /dev/null
+++ b/cookbook/pocketflow-supervisor/utils.py
@@ -0,0 +1,30 @@
+from openai import OpenAI
+import os
+from duckduckgo_search import DDGS
+
+def call_llm(prompt):    
+    client = OpenAI(api_key=os.environ.get("OPENAI_API_KEY", "your-api-key"))
+    r = client.chat.completions.create(
+        model="gpt-4o",
+        messages=[{"role": "user", "content": prompt}]
+    )
+    return r.choices[0].message.content
+
+def search_web(query):
+    results = DDGS().text(query, max_results=5)
+    # Convert results to a string
+    results_str = "\n\n".join([f"Title: {r['title']}\nURL: {r['href']}\nSnippet: {r['body']}" for r in results])
+    return results_str
+    
+if __name__ == "__main__":
+    print("## Testing call_llm")
+    prompt = "In a few words, what is the meaning of life?"
+    print(f"## Prompt: {prompt}")
+    response = call_llm(prompt)
+    print(f"## Response: {response}")
+
+    print("## Testing search_web")
+    query = "Who won the Nobel Prize in Physics 2024?"
+    print(f"## Query: {query}")
+    results = search_web(query)
+    print(f"## Results: {results}")
\ No newline at end of file