tech_stack.md

FairValue Transfer Cap Estimator: Technical Stack Specification

Component	Technology	Justification
Language	Python 3.9+	Industry standard for Data Science and Machine Learning.
Data Scraping	Requests, BeautifulSoup4, Selenium	Free, effective for scraping unstructured data from sources like Transfermarkt and FBref.
Data Manipulation	Pandas, NumPy	Best in class for handling tabular time-series data and vectorized operations.
Machine Learning	XGBoost, Scikit-Learn	Gradient boosting is state-of-the-art for tabular data; inherently handles non-linear relationships and missing data robustly.
Visualization	Plotly, Streamlit	Enables interactive, web-ready charts (gauges, waterfall plots) without JS overhead.
Explainability	SHAP	Gold standard for model interpretation, allows breakdown of exact features influencing the price cap.
Hosting	Hugging Face Spaces (CPU Basic)	Free, permanent public URL, supports Streamlit natively and enables rapid MVP deployment.
Version Control	Git / GitHub (Free)	Essential for code collaboration and proving project credibility.