Skillsync is a YC W26 startup that enables AI chat sessions to be portable across different AI agents and teammates, prioritizing local-first storage without vendor lock-in. The platform works with multiple AI tools including Claude, Cursor, and others, and offers a CLI for non-Mac users and server environments.
A project demonstrates how to create single files that function as both bash and PowerShell scripts, replacing curl-based installers with portable HTTP tools. The approach enables secure, verified installation across Unix, Windows, and embedded systems without external dependencies, with each tool under 5 kB and readable before execution.