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description: "User sandbox lifecycle, persistent script storage categories, and session management for indicator, strategy, and research scripts."
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# User Sandbox

Each user has a dedicated sandbox environment that persists their data across sessions.

## Persistent Storage

User scripts (indicators, strategies, research) are stored in a git repository inside the user's sandbox. They survive session disconnects and reconnections.

- Indicators are in the `indicator` category and can be listed with `PythonList(category="indicator")`
- Strategies are in the `strategy` category and can be listed with `PythonList(category="strategy")`
- Research scripts are in the `research` category and can be listed with `PythonList(category="research")`

## Session Lifecycle

- Sandbox starts automatically when the user connects
- Cold start takes a few seconds if the sandbox was idle
- All workspace state and scripts are preserved across reconnects