Packaging

Packaging serializes a validated skin folder into one file: name.po9-skin.

Format

A .po9-skin is a ZIP archive (deflate) with the folder structure preserved at the archive root and a .po9-skin extension.

• manifest.json MUST be the first entry, at the archive root.
• No entry may use an absolute path or escape the root (..).
• No compression bombs: the Validator enforces a max uncompressed size.

Integrity

• The archive MUST NOT be encrypted or password-protected.
• The app re-validates the archive on import; a modified or truncated file is rejected.

Build it

po9 package ./my-skin      # validates, then writes my-skin.po9-skin

po9 package refuses to write a file that fails validation — an invalid skin never becomes a .po9-skin.