Add WithPreviewRenderer and standalone OpenUI bundle support

[AbhinRustagi]

Support standalone rendering of complete OpenUI response bundles, with an optional inline preview. Use Renderer for direct rendering and WithPreviewRenderer when a preview should open the rendered UI.

Changes

• Parse content, script, and completion sections; preserve bare OpenUI Lang support and show query defaults while bundled execution waits for completion.
• Add configurable preview/content rendering, metadata, controlled visibility, and host-owned portal support through WithPreviewRenderer.
• Add protocol-independent server helpers for stateless script execution and generalized Cloud configuration using baseResponse.
• Initialize the telemetry counter for the existing type-mismatch validation error so lang-core typechecks.

Validation

• Built and typechecked lang-core and react-lang.
• Passed all 115 existing lang-core tests and 12 existing react-lang tests.
• Confirmed the expression parser, statement parser, parser error types, and validation test match the original base.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated
openui-docs	Ready	Preview	Oct 6, 2026 4:57pm UTC