Language Design Skill

This skill provides guidance for designing language features, covering lexer, parser, AST, and interpreter patterns.

When to Use

• Adding new language features to Lea
• Implementing new operators or syntax
• Designing AST node types
• Extending the interpreter

Key Topics

• Lexer token design
• Recursive descent parsing
• Precedence climbing
• AST discriminated unions
• Tree-walk interpretation
• Environment/scope management

Reference Files

• references/error-handling.md - Error recovery patterns
• references/builtins.md - Builtin function design