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TOML is a config file format with explicit types. It's the official format for Python's pyproject.toml and Cargo's Cargo.toml.
TOON (Token-Oriented Object Notation) is a line-oriented format optimized for LLMs. It reduces token count by 20-60% compared to JSON while maintaining readability.
Use TOON when building LLM-powered applications, optimizing API costs, or when you need compact, readable data for AI models.