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Published 3 days ago
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Dart implementation of TOON (Token-Oriented Object Notation) - a compact format for LLMs with 30-60% fewer tokens than JSON. Supports JSON, YAML, and XML conversion.

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1.3.0 #

  • Removed Flutter dependency: Now works in pure Dart environments (server-side, CLI, etc.)
  • Major performance improvements: 2.2x faster round-trip (encode+decode)
  • Encoder optimized: 59% faster (133ms → 55ms for 1000 records)
  • Decoder optimized: 45% faster (120ms → 66ms for 1000 records)
  • Cached RegExp patterns to avoid repeated compilation in hot loops
  • Eliminated Set allocations in tabular format detection
  • Optimized string escaping/unescaping with early-exit fast paths
  • Replaced regex-based identifier validation with character code checks
  • Added fast number detection without parsing overhead
  • Optimized comma splitting with substring instead of StringBuffer
  • Pre-allocated arrays with known sizes in decoder
  • Used code units for character scanning (avoids 1-char String allocations)
  • Cached indent strings in encoder (avoids repeated ' ' * n)
  • Added benchmark test for performance tracking

1.2.0 #

  • Added XML support with xmlToToon() and toonToXml() functions
  • XML conversion powered by the xml2json package
  • Support for Parker convention (lightweight, ideal for LLMs)
  • Support for Badgerfish convention (preserves attributes and namespaces)
  • CLI now supports XML files (.xml) with auto-detection
  • Added 26 comprehensive tests for XML conversion
  • Updated README with XML examples and proper credits
  • Total test count: 105+ tests

1.1.0 #

  • Added YAML support with yamlToToon() and toonToYaml() functions
  • CLI now supports YAML files (.yaml, .yml) with auto-detection
  • Added 33 comprehensive tests for YAML conversion
  • Updated README with YAML examples and usage guide
  • Total test count: 79+ tests

1.0.1 #

  • Fixed LICENSE file to comply with pub.dev requirements
  • Reduced topics to 5 for pub.dev compliance
  • Updated README with Credits & Reference section
  • Added comprehensive contribution guidelines
  • Minor documentation improvements

1.0.0 #

  • Initial release
  • encode() function to convert Dart objects to TOON format
  • decode() function to parse TOON strings back to Dart objects
  • Custom delimiters support: comma, tab, and pipe
  • Length marker option for array validation
  • Custom indentation configuration
  • Tabular array format for uniform objects
  • Flat map mode for flattening nested structures
  • Strict mode validation for decoding
  • Lenient mode for best-effort parsing
  • CLI tool for encoding and decoding files
  • Stdin/stdout support for piping
  • Auto-detection of format by file extension

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Metadata

Dart implementation of TOON (Token-Oriented Object Notation) - a compact format for LLMs with 30-60% fewer tokens than JSON. Supports JSON, YAML, and XML conversion.

Repository (GitHub)
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Topics

#toon #llm #json #token-efficiency #serialization

Documentation

API reference

License

MIT (license)

Dependencies

xml2json, yaml

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