Simple Runner is a robust, production-ready server designed to empower Language Learning Models (LLMs) with secure and controlled access to local system commands. It facilitates pattern-based command discovery, enabling LLMs to identify available functionalities, and provides a safe execution environment with configurable security policies, timeouts, and resource limits. Ideal for local development, it ensures LLMs can interact with the host machine responsibly while preventing dangerous operations through features like command blocking and shell expansion protection. It includes structured YAML configuration and comprehensive logging.