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feat: add compact JSON generation and playground mode - #438

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laf/compact-generation
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lahfir wants to merge 5 commits into
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laf/compact-generation

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@lahfir

@lahfir lahfir commented Oct 27, 2026 •

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  1. UI generation currently requires models to produce element IDs and references.
  2. Adds catalog-constrained nested JSON generation with incremental compilation and a Compact playground mode with responsive previews.
  3. No linked issue or PR.

Playground demo

Live Compact generation, output views, responsive preview, form interaction, and JSONL/YAML controls. Pauses between interactions are trimmed; generation plays at its recorded speed.

playground-demo.mp4

@vercel

vercel Bot commented Oct 27, 2026 •

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

Project Deployment Actions Updated
json-render Ready Ready Preview, v0 Oct 28, 2026 12:24am UTC
json-render-chat-demo Ready Ready Preview, v0 Oct 28, 2026 12:24am UTC
json-render-dashboard-demo Ready Ready Preview, v0 Oct 28, 2026 12:24am UTC
json-render-game-engine-demo Ready Ready Preview, v0 Oct 28, 2026 12:24am UTC
json-render-image-demo Ready Ready Preview, v0 Oct 28, 2026 12:24am UTC
json-render-no-ai Ready Ready Preview, v0 Oct 28, 2026 12:24am UTC
json-render-react-email-demo Ready Ready Preview, v0 Oct 28, 2026 12:24am UTC
json-render-react-pdf-demo Ready Ready Preview, v0 Oct 28, 2026 12:24am UTC
json-render-react-three-fiber-demo Ready Ready Preview, v0 Oct 28, 2026 12:24am UTC
json-render-remotion-demo Ready Ready Preview, v0 Oct 28, 2026 12:24am UTC
json-render-solid-demo Ready Ready Preview, v0 Oct 28, 2026 12:24am UTC
json-render-svelte-chat-demo Ready Ready Preview, v0 Oct 28, 2026 12:24am UTC
json-render-svelte-demo Ready Ready Preview, v0 Oct 28, 2026 12:24am UTC
json-render-vue Ready Ready Preview, v0 Oct 28, 2026 12:24am UTC

Comment thread packages/core/src/compact-generation.ts Resolved
Encode optional values and records in a strict wire profile, then decode them before publishing normal spec patches. Use the profile in the playground and streaming guide while retaining the native format.

This branch was successfully deployed

14 active deployments
Preview – json-render-svelte-chat-demo — f7b13b18 Deployed Oct 28, 2026 by vercel[bot]
Preview – json-render — f7b13b18 Deployed Oct 28, 2026 by vercel[bot]
Preview – json-render-chat-demo — f7b13b18 Deployed Oct 28, 2026 by vercel[bot]
Preview – json-render-game-engine-demo — f7b13b18 Deployed Oct 28, 2026 by vercel[bot]
Preview – json-render-dashboard-demo — f7b13b18 Deployed Oct 28, 2026 by vercel[bot]
Preview – json-render-remotion-demo — f7b13b18 Deployed Oct 28, 2026 by vercel[bot]
Preview – json-render-image-demo — f7b13b18 Deployed Oct 28, 2026 by vercel[bot]
Preview – json-render-react-three-fiber-demo — f7b13b18 Deployed Oct 28, 2026 by vercel[bot]
Preview – json-render-no-ai — f7b13b18 Deployed Oct 28, 2026 by vercel[bot]
Preview – json-render-react-pdf-demo — f7b13b18 Deployed Oct 28, 2026 by vercel[bot]
Preview – json-render-react-email-demo — f7b13b18 Deployed Oct 28, 2026 by vercel[bot]
Preview – json-render-svelte-demo — f7b13b18 Deployed Oct 28, 2026 by vercel[bot]
Preview – json-render-solid-demo — f7b13b18 Deployed Oct 28, 2026 by vercel[bot]
Preview – json-render-vue — f7b13b18 Deployed Oct 28, 2026 by vercel[bot]
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2 participants