Capsule turns web apps into shareable documents

Bundling web apps and their databases into standalone files is an ingenious revival of the classic desktop document model, providing the missing persistence layer for the coming wave of AI-generated micro-applications. HyperCard for the modern web: By combining HTML/JS with SQLite in an executable document, Capsule lets users share interactive tools as easily as emailing a spreadsheet, bypassing cloud infrastructure entirely. Natural complement to prompt-driven development: As coding LLMs make generating bespoke single-page utilities instantaneous, pairing them with an embedded storage runtime solves state management without hosting hurdles. Sync and merge limitations: While UUID and timestamp tracking provide basic conflict detection, asynchronous multi-user collaboration on local binary files remains brittle compared to native CRDT implementations. Permissions are critical: Maintaining strict sandbox isolation for network and filesystem capabilities will make or break user safety, especially as users execute arbitrary community or AI-crafted capsules.