Bento

Most decks still need an account, an installer, or somebody else's cloud. Bento packs the viewer, editor, presenter, fonts, charts, and your content into one ~560 KB HTML file that rewrites itself on save. The deck data is plain JSON at the top of the file, so agents can edit it in place and round-trip without a proprietary format. Optional end-to-end encrypted collab keeps keys in the file, not on a server. The useful shift is office software that travels with the document and is honest enough for tools to read.