Streamdown 2.3 — Refreshed design and interactive playground
Streamdown 2.3 introduces a unified nested-card design across tables, code blocks, and diagrams, along with sticky action buttons and instant plain-text rendering. A new interactive playground enables real-time testing with custom markdown and editable props, while new hooks provide improved rendering control and bug fixes address nested HTML parsing, custom tags, and syntax highlighting issues.
Streamdown 2.3 enhances design consistency by applying a unified nested-card design to tables, code blocks, and Mermaid diagrams. Action buttons now remain sticky during scroll, and code blocks render plain text immediately to reduce perceived latency before syntax highlighting loads.
To accelerate testing, the new interactive playground supports real-time execution with custom markdown and editable props. This enables faster experimentation with configuration changes without spinning up a local project.
New hooks and utilities provide improved control over rendering. The hook detects in-progress fenced code blocks during streaming. Tables now support copying as Markdown, and a new HTML indentation normalization property handles inconsistent whitespace in raw input. Image rendering also includes improved error handling with custom messaging.useIsCodeFenceIncomplete
Documentation has been reorganized for easier reference. Plugin documentation for CJK, Math, and Mermaid is now consolidated into dedicated pages, and the redesigned homepage links directly to templates for faster onboarding.
This release also resolves issues with nested HTML block parsing, custom tag handling, Mermaid diagram artifacts, and Shiki syntax engine inconsistencies. Streamdown 2.3 ships with a fully cleared bug backlog.
for more information.Read the documentation
Source: original entry ↗
More from Vercel
Follow Vercel to get its new changes in your feed and email digest.
OpenAI Decisions API now available on AI Gateway
OpenAI's Decisions API is now accessible through Vercel's AI Gateway with an OpenAI-compatible endpoint, enabling decision models to answer typed questions and return probabilities, choices, and scores for routing, triage, and guardrails use cases. Support is available across the OpenAI SDK, AI SDK, HTTP API, and CLI with the latest versions.
Timestamp attributes now supported in Vercel Flags
Vercel Flags now supports timestamp attributes for entities, allowing you to create time-based targeting rules. Use this feature to run limited-time campaigns, show content between specific dates, or target users based on registration date.
Glyph Cluster now available in stealth on AI Gateway
Glyph Cluster, a reasoning model for coding and long-context analysis, is now available as a stealth model on Vercel's AI Gateway for Pro and Enterprise plan teams with purchased AI Gateway credits at no cost during the stealth period. The model supports function calling, streams responses, and can be accessed via AI SDK, OpenAI-compatible APIs, and coding agents.