name: json-formatter description: Validate, format, and minify JSON files when users request JSON validation, formatting, or ask to validate their JSONs allowed-tools: [Read, Bash]

JSON Formatter Skill

Format, validate, and minify JSON files with precision and safety.

Capabilities

This skill provides comprehensive JSON processing:

• Validation: Parse and validate JSON syntax, reporting errors with line numbers
• Formatting: Pretty-print JSON with configurable indentation (default 2 spaces)
• Minification: Remove all unnecessary whitespace for production use
• Safety: Always show diffs before writing changes
• Metrics: Report file size before and after operations

Usage

When a user requests JSON processing, this skill:

1. Reads the target JSON file
2. Validates the syntax
3. Asks user preference: format or minify
4. Shows the proposed changes
5. Reports size difference
6. Writes the result

Instructions

For any JSON file operation:

• Always validate before processing
• Use 2-space indentation for formatting
• Preserve UTF-8 encoding
• Show clear error messages with line numbers for invalid JSON
• Never modify files without showing diffs first
• Handle nested objects and arrays correctly
• Support both single files and batch operations