streamlit-dev

What problem does it solve?

Streamlit development can be complex, leading to common pitfalls like incorrect session state management, inefficient caching, rerun loops, and suboptimal UI/UX. This Skill provides expert guidance to avoid these issues and build high-quality, stable, and performant Streamlit applications.

Core Features & Use Cases

• Robust Session Management: Learn to correctly initialize and manage st.session_state to prevent bugs and ensure data consistency across reruns.
• Optimized Caching: Understand and apply @st.cache_resource effectively for singletons (like database connections or ML models), while strictly avoiding problematic @st.cache_data usage to prevent desynchronization.
• Controlled Reruns & Saves: Implement explicit save patterns with buttons and prevent infinite rerun loops, ensuring a stable and predictable user experience.
• Best Practice UI/UX: Design visually appealing and compact interfaces using st.metric, st.container(border=True), st.expander, and Plotly charts, adhering to strict visual rules for clarity and user engagement.
• Secure & Performant Code: Get guidance on handling async operations safely, ensuring SQL safety with parameterized queries, managing database connections with try/finally, and optimizing app performance.

Quick Start

Help me develop a Streamlit application that manages user session state for a multi-page dashboard, ensuring proper caching and a compact UI layout using containers and expanders.