Svelte Streamdown is a Svelte 5 streaming markdown renderer for AI chat interfaces. It ports the useful streaming markdown behavior from Vercel's Streamdown into a focused Svelte package and keeps remend for incomplete markdown repair.

• packages/svelte-streamdown - the Svelte component package.
• packages/remend - incomplete markdown repair utilities retained from upstream Streamdown.

<script lang="ts">
  import { Streamdown } from "svelte-streamdown";
  import "svelte-streamdown/styles.css";

  let markdown = $state("**Streaming** markdown");
</script>

<Streamdown {markdown} animated />

The package exposes:

• Streamdown - the main Svelte component.
• styles.css - default markdown styling.

Install dependencies with Bun:

bun install

Run the main quality gates:

bun run format:check
bun run typecheck
bun run lint
bun run test
bun run build

Build only the publishable packages:

bun run build:packages

Run the remend benchmark suite:

bun run bench

New Svelte Streamdown code is licensed under MPL-2.0. Apache-2.0 upstream license material is retained in LICENSE-APACHE for copied or derived upstream Streamdown and remend work.