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| 1 | +# Changelog |
| 2 | + |
| 3 | +All notable changes to this project are documented here. The format is based on |
| 4 | +[Keep a Changelog](https://keepachangelog.com/en/1.1.0/), and this project adheres |
| 5 | +to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). |
| 6 | + |
| 7 | +## [0.1.1] — 2026-06-07 |
| 8 | + |
| 9 | +No API or behaviour changes — `0.1.1` is documentation, validation, and metadata. |
| 10 | + |
| 11 | +### Added |
| 12 | + |
| 13 | +- **Differential validation against `rust-lzo`** — an independent decoder |
| 14 | + converted from Linux's `lzo1x_decompress_safe`, used as a local oracle (never a |
| 15 | + dependency). Identical output on the full real corpus and across 3,000,000 |
| 16 | + mutation-fuzz inputs with zero divergence and no panics. Harness: |
| 17 | + `validation/lzodiff`. |
| 18 | +- **`docs/validation.md`** documenting the full methodology — reference-encoder |
| 19 | + round-trips, a 32.4 MB real-world corpus, the differential check, fuzzing, and |
| 20 | + coverage — with scope limits stated plainly. Real-content regression vectors |
| 21 | + (`lzo1x_999`) added to the committed test set. |
| 22 | + |
| 23 | +### Changed |
| 24 | + |
| 25 | +- Documentation and positioning now lead with the real differentiator — safety |
| 26 | + against malicious, crafted, or corrupted input (`#![forbid(unsafe_code)]`, |
| 27 | + fuzz-hardened, typed errors, cross-validated) — rather than licence contrast. |
| 28 | + |
| 29 | +## [0.1.0] — 2026-06-06 |
| 30 | + |
| 31 | +### Added |
| 32 | + |
| 33 | +- Initial release: a safe, `no_std`, zero-dependency pure-Rust **LZO1X |
| 34 | + decompressor**. `decompress_into` (core, allocation-free) and an allocating |
| 35 | + `decompress` behind the `alloc` feature. Decodes `lzo1x_1` / `lzo1x_1_15` / |
| 36 | + `lzo1x_999` streams (they share one decompressor), `#![forbid(unsafe_code)]`, |
| 37 | + validated round-trip against reference liblzo2 vectors, and fuzz-hardened. |
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