error-messages

# Error Messages Skill ## Overview Expert skill for designing and implementing high-quality compiler error messages. ## Capabilities - Design clear, actionable error message templates - Implement source context display with underlines - Generate fix suggestions and quick fixes - Handle error cascades and suppression - Implement multi-span error annotations - Support machine-readable error output (JSON) - Implement color/styled terminal output - Design error recovery strategies for better diagnostics ## Target Processes - error-message-enhancement.js - parser-development.js - type-system-implementation.js - semantic-analysis.js - lsp-server-implementation.js ## Dependencies Elm/Rust error message guidelines ## Usage Guidelines 1. **Clarity**: Make error messages clear and actionable 2. **Context**: Show relevant source code context with precise location 3. **Suggestions**: Provide fix suggestions when possible 4. **Cascades**: Suppress cascading errors to avoid overwhelming users 5. **Machine-Readable**: Support JSON output for tooling integration ## Output Schema ```json { "type": "object", "properties": { "errorFormat": { "type": "string", "enum": ["human", "json", "sarif"] }, "features": { "type": "array", "items": { "type": "string" } }, "colorSupport": { "type": "boolean" }, "generatedFiles": { "type": "array", "items": { "type": "string" } } } } ```