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Reasoning — stream, then fold — preview

Reasoning — stream, then fold

FancyUI FANCYUI

The trace streams with a live timer, then folds itself into a one-line summary.

#minimal#ambient

Open docs

Use in FancyUI

Type
Interaction
Interaction
Ambient
Style
Minimal
Code availability
Open source

Why it works

While the model thinks, its trace streams into a scrolling panel with a shimmering header and a live timer. When it finishes, the panel folds itself into a one-line summary — the reasoning is visible while it matters and out of the way after.

When to use it

Reasoning or tool traces that some readers want and most skim past.

Things to watch

The header is a real button with `aria-expanded`. Once the reader opens or closes it, it stays where they left it. Motion lives under `no-preference`.

Implementation clues

  • auto-open while streaming
  • auto-collapse 600ms after the end
  • autoscroll follows the stream
  • timer from `since`