bm25-search-engine-pure-python-zero-dependencies

The frontend-data skill ships a BM25 search engine (core.py + search.py + design_system.py) with zero external Python dependencies — standard library only. This means it runs reliably on the VPS without pip installs or virtual environments. The DATA_DIR resolves via Path(__file__).parent.parent / 'data', so the skill is relocatable without path changes.