Migration from Streamdown

Streamdown commonly receives the accumulated string as children. HyperMarkdown's finished mode maps directly, but its fastest streaming path uses a ref:

// Streamdown
<Streamdown isAnimating={status === "streaming"}>
  {accumulatedText}
</Streamdown>

// HyperMarkdown
<HyperMarkdown ref={renderer} streaming animation />

Move accumulation out of React state and call write(delta) from the same callback that receives provider events.

Streamdown	HyperMarkdown
Children / accumulated text	write(delta) while streaming, md when finished
isAnimating	streaming plus write("", true) at the end
parseIncompleteMarkdown	Built in
Plugin packages	plugins={{ math, code, diagram, cjk }}
Component overrides	components with stable identities
Tailwind typography	Import @aeven-ai/hypermarkdown/styles.css and theme with --hm-* variables

Import the stylesheet once. Map optional Streamdown packages into the plugins object rather than passing remark/rehype arrays.

If a provider only gives cumulative snapshots, convert them to deltas at the boundary; see Streaming and delta rendering.