: The command-line tool 7z.exe acts as a client that calls 7z.dll to handle the actual archive creation and extraction. Key Features to Implement

💡 : If you are adding a feature for a specific platform, remember that p7zip is the primary fork for Linux and macOS development.

: Most 7-Zip source code is available under the GNU LGPL license, while the LZMA SDK is in the public domain (or more liberal licenses ), allowing you to modify and recompile it.

: If you use LGPL code, your modifications to that specific DLL must remain open-source.

: This is the core toolkit provided by 7-Zip for developers to integrate 7z compression/decompression into their own apps.

: New features should avoid vulnerabilities like the CVE-2022-29072 heap overflow , which was tied to how the help system ( 7-zip.chm ) interacted with the main application.

: 7z has an open architecture, meaning you can integrate new methods (like Brotli, Zstd, or LZ4) by writing a wrapper for the codec.