Fixes
- Optimize images in Markdown Embed (#6089)
- Recover missing preview assets (#6091)
- Resolve published asset paths in structured content (#6096)
- Preserve SSG exports with Assets queries (#6102)
- Restore Vercel sanitizer compatibility (#6103)
- Refresh resource diagnostics metadata (#6113)
- Bind dynamic page metadata expressions (#6110)
- Improve MCP authoring and preview reliability (#6105)
- Stop owned preview process trees (#6111)
Documentation
- Document Content Engine workflows (#6097)
Other changes
- Restore safe-to-deploy workflows (#6054)
- Diagnose and reduce Assets resource latency (#6095)
- Replace Lost Pixel with self-hosted visual regression (#6086)
- Release 12-08-2026
Full Changelog: 0.289.0...0.290.0