streamlit-extras

Builds bidirectional Streamlit Custom Components v2 (CCv2) using `st.components.v2.component`. Use when authoring inline HTML/CSS/JS components or packaged components (manifest `asset_dir`, js/css globs), wiring state/trigger callbacks, theming via `--st-*` CSS variables, or bundling with Vite. For streamlit-extras, use the `pagination` extra as a reference implementation.

Guides implementation of new streamlit-extras from spec to verification. Use when adding a new extra, creating a Streamlit component, or when the user says "implement extra", "new extra", or "add extra".