| # Release Notes: v4.0.0 OmniCrown | |
| ## Added | |
| - Whole-archive password mode hiding manifest, file names, and metadata. | |
| - PBKDF2-HMAC-SHA256 + ChaCha20 + HMAC-SHA256 password envelope. | |
| - Optional GF(256) two-parity recovery records. | |
| - `repair` command. | |
| - `compat-zip` command. | |
| - `hvce_gui.py` Tkinter GUI. | |
| - Windows context-menu PowerShell installer. | |
| - Compact lzma/zlib adaptive manifest compression. | |
| - Solid small-file micro-pack for office/source folders. | |
| - Faster high-entropy skip path. | |
| - Safer extraction policy for symlinks. | |
| - Expanded benchmark corpora: small office, photonic generators, versioned media, already-compressed, random control. | |
| ## Changed from v3 | |
| - v3 archive format is superseded by HVCE4. | |
| - Header compression now chooses zlib or lzma. | |
| - Encrypted archives now hide all private manifest content. | |
| - Small files default to microgroups when beneficial. | |
| - Random and media-like data is explicitly treated as an archiver state problem, not a false compression-ratio promise. | |
| ## Compatibility | |
| This reference implementation reads HVCE4 archives produced by this package. It is not a stable long-term container standard yet. | |