lon 1.1.0

Compact, canonical, lossless JSON codec for AI-first data exchange with self-describing record tables.

Changelog

1.1.0 - 2026-10-26

• Add optional multi-line rendering: LonCodec(pretty: true) and jsonToLon(..., pretty: true) place each object member and table row on its own line with two-space-per-depth indentation; LonCodec(pretty: true).decodeJson emits standard indented JSON.
• Add --pretty to the lon encode and lon decode CLI commands.
• Add lon check to validate that input is well-formed LON: silent exit 0 on success, 65 on invalid input, 66 on file-system errors.
• Fix the CLI to reject a leading UTF-8 byte-order mark instead of silently stripping it, matching codec behavior.
• Improve codec throughput 1.4x-2.9x (AOT, tool/bench.dart): replace the per-token regex classifiers with hand-rolled scanners behind an exact non-ASCII folding fallback, add fast paths for printable-ASCII visibility checks, bulk-write unescaped string runs, cache hot parser loops' locals, preallocate decoded arrays, and read CLI input through BytesBuilder. Canonical output is byte-for-byte unchanged.
• Add tool/bench.dart, a zero-dependency Stopwatch throughput benchmark (small/medium/large payloads, median-of-9 rounds, dart run or AOT-compiled).
• Document that useTables applies to encoding only, and tighten static analysis lints.
• Expand boundary, limit, and round-trip test coverage.

1.0.1 - 2026-08-02

• Add 20,000-case multi-seed structural property tests, exact ordinary-container depth boundaries, dynamic value and record-shape matrices, duplicate-key records, deterministic LON mutations, and exhaustive complex-container truncations.

1.0.0 - 2026-08-02

• Publish the canonical Language Object Notation v1 format and Dart codec.
• Add lossless JSON text conversion that preserves member order, duplicate members, string code units, and number lexemes.
• Add JSON-compatible Dart value encoding and decoding.
• Add self-describing array record tables with deterministic compactness selection.
• Add strict ambiguity, Unicode visibility, malformed input, and trailing content checks.
• Add configurable nesting, expansion, input, and output resource limits.
• Add the lon encode and lon decode command-line interface.
• Add conformance fixtures, JSONTestSuite coverage, generated round trips, and security regression tests.
• Add a reproducible LON, Compact JSON, TOON, YAML, and Pretty JSON token benchmark.
• Replace tagged and counted table headers with the minimal [SCHEMA;ROW;ROW] array form; require at least two rows and leaf values, and keep keyed and varying object data explicit for zero-prompt readability.
• Add exhaustive UTF-16 value and member-name coverage, grammar-conflict table-schema cases, strict chunked UTF-8 transport tests, and explicit network framing and embedding rules.
• Gate pushes and pull requests on Dart 3.3 and stable formatting, analysis, tests, and publish validation; run benchmarks on every push and retain SHA-named reports for 30 days.
• Add English and Simplified Chinese documentation and scalable project branding.