CodeSandbox: Deprecation Notice

Just got email with such info from CodeSandbox:

-Sandpack: No longer actively maintained. Repo stays public.

- CodeSandbox CI: Shutting down on April 15, 2026. Migrate to an alternative CI provider before then.

- CodeSandbox Repos: New repository imports disabled April 15, 2026. Full shutdown on July 15, 2026. Migration guide to GitHub Codespaces included below.

- Browser sandboxes and Devboxes: No changes. These remain live and supported.

And the context seems to be: Together.ai recognized that what we'd built — fast, isolated, programmable environments — was exactly the primitive needed for a world where AI agents write, run, and iterate on code at scale. Joining Together gave us both a home and a sharper mission.