magic-pack

Compresses and decompresses files across 13 archive formats: zip, tar, bz2, gz, tar.bz2, tar.gz, 7z, xz, tar.xz, zst, tar.zst, lz4, tar.lz4. Also detects, packs, and unpacks UPX executables, and password-protects 7z archives with AES-256 (encrypting both contents and filenames). Auto-detects archive type via magic bytes on decompress. Activates when the user asks to compress, decompress, extract, unpack, unzip, archive, package, or bundle a directory; encrypt, password-protect, or securely send a file, or make a password-protected 7z; unpack a UPX-packed executable or check whether a binary is packed; identify "what kind of archive is X"; or work with tar.gz, gzip, bzip2, 7-zip, xz, zstd, lz4, or nested archives. Provides an MCP server (`magic-pack-mcp`, preferred for agents — structured JSON output) and a CLI binary (`magic-pack`).