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Auto Insta-HBD Replier

Just like you (probably...), I am a college student with numerous friends and colleagues. Every year, I used to undergo this ritual of replying everyone with a "Thank You❤️✨". Well... you come up with such ideas when you realise your life is monotonous enough to add such a ritual to this tiny but special day of your life.

What is it?

An AI Agent that automates the process of fetching, analyzing and crafting the best reply to the sweet birthday wishes of your closest friends and family members!!!

Credit goes to...

  1. BACKBONE: Langgraph Agent
  2. Instagrapi
  3. Google Gemini (Free APIs!)

How does it work?

The system uses a LangGraph Agent that orchestrates the entire workflow through a state machine with the following nodes:

Agent Workflow

🔄 Agent Workflow

  1. Fetch Messages (fetch_messages)

    • Connects to Instagram using InstagramClient
    • Retrieves unread direct messages from the target date
    • Filters out already processed messages and empty text messages

  2. Birthday Detection (check_birthday_message)

    • Uses Google Gemini LLM to analyze message content
    • Identifies birthday-related keywords: "birthday", "happy birthday", "bday", "celebrate", "wishes", "many more"

  3. Smart Routing

    • Birthday Message → Generate personalized reply
    • Non-Birthday Message → Skip and mark as processed

  4. Reply Generation (generate_birthday_reply)

    • Leverages llm (Google Gemini 2.0 Flash) to craft responses
    • Creates warm, genuine, and personalized replies
    • Matches the tone of the original message
    • Keeps responses concise (1-2 sentences)

  5. Send Reply (send_reply)

    • Automatically sends the generated reply via Instagram DM
    • Marks user as processed to avoid duplicate responses
    • Continues to next message in queue

Try it yourself

  1. Installation of the necessary libraries
pip install -r requirements.txt
  1. Environment Variables:

Rename .env.example -> .env

Fill the .env in the following format:

TARGET_DATE=yyyy-mm-dd
INSTAGRAM_USERNAME=your_username
INSTAGRAM_PASSWORD=your_password
GOOGLE_API_KEY=your_gemini_api_key
  1. Open your favorite terminal (make sure you are int the root of the project) and run:
python main.py