MaitreeVaria/Indian-Sign-Language-Detection — reverse-engineered prompt

Build me a simple Python app that recognizes Indian Sign Language gestures in real time from my webcam. It should use hand landmark detection, feed those points into a trained neural network model, and show the predicted gesture label directly on the live camera window.

Please include everything needed to run it locally, with clear setup steps for Python, Mediapipe, OpenCV, and NumPy. I want a main script I can run from the terminal, and it should open the webcam, detect the hand, classify the gesture, display the result, and let me quit by pressing q.

Also include a way to generate keypoint data from an ISL image dataset and a notebook or training workflow for building the classifier model. Keep it practical and beginner friendly, with comments where the logic might be confusing. Use the existing trained model file if available, and look up current docs online if needed.