v0 2026.06.26

v0 2026.06.26 was released on .

Summary

Platform API v2, MCP chat tools, and Office file attachments What's new - Platform API v2 (beta) can now start a chat from a GitHub repository, and the API docs add a v1 to v2 migration guide and a...

Release Context

  • This was the 39th v0 release of 2026 tracked by Havoptic.
  • It shipped 7 days after v0 2026.06.19 (June 19, 2026).

Shipped around the same time

Within 3 days of this release, other AI coding tools also shipped:

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Release Notes

Platform API v2, MCP chat tools, and Office file attachments What's new - Platform API v2 (beta) can now start a chat from a GitHub repository, and the API docs add a v1 to v2 migration guide and a version switcher. - The v0 MCP server adds tools to create, find, and read chats, fetch a preview, and send messages. - Attach Excel (.xlsx) and Word (.docx) files to a chat. - Pasted images and files now appear as inline chips in the prompt composer, with image thumbnails, and stay in place across reloads. - Custom skills can set disable-model-invocation to stay out of the agent's auto-invoked catalog while remaining available when attached or loaded explicitly. Bug fixes - Starting a new chat from the home composer no longer inherits the previous chat's streaming state, which could turn Send into Queue and send your message to the wrong chat. - Project visibility settings now respect your team's Vercel Authentication requirements. - A paying team is no longer downgraded to free when a billing read fails. - Preview sandboxes no longer time out mid-generation during long agent runs, including when the tab is closed. - The Restart button on a stopped preview is clickable again even when no snapshot is available. - Refreshing the preview no longer throws an invalid URL error. - The editor no longer shows a false start error when a preview, dev server, or install fails while the editor itself is healthy. - A saved model selection no longer briefly flips to a default while the page loads. - Design system import routes private registry authentication through your shared environment variables instead of asking for secret values in chat. - Snowflake gets fewer first deploy failures, creates a missing snowflake.yml for you, keeps the publish flow available on shared chats before you connect your account, and fixes environment variable injection on preview refresh. - Template previews open through the authenticated path instead of redirecting you to vercel.com inside the preview. - Upgrade checkout has clearer error recovery, with specific actions for address, authentication, and expired link failures. - Sending your first message from the home screen now reveals the chat pane if it was collapsed. - The prompt form no longer grows when you open the + menu with nothing selected. - Fixed breadcrumb flicker, command palette search visibility, a missing sidebar trigger, oversized pagination buttons in usage settings, and the team avatar and name wrapping on the templates page. Misc. - The credit purchase modal now notes that purchased credits expire one year after purchase. - The design system you select in the composer now persists per scope. - Refined chat panel collapse and sidebar hover behavior. - Updated the API docs with deprecation notes, refreshed the design systems docs, and removed the prompt enhancement section.

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