Exposes Rulemorph's data transformation engine through four tools: transform for converting CSV, JSON, YAML, XML, HTML, and Excel files using declarative YAML rules, validate_rules for checking rule syntax before execution, generate_dto for creating type definitions in Rust, TypeScript, Python, Go, Java, Kotlin, or Swift from your transformation mappings, and analyze_input for inspecting source data structure. The transformation rules support field mappings, pipe expressions for string and numeric operations, conditional logic, and custom reusable operations. Built in Rust with conservative parsers that reject macros, formulas, and entities. Useful when you're normalizing vendor API responses, cleaning up CSV imports, or maintaining transformation logic as versioned config instead of scattered scripts. The same rules work across CLI, embedded library, local API server, and now Claude.