Elvin Agent Testbed

Elvin

Swaps the visual system — palette, type, geometry and elevation — inside the sandboxed app.

ThreadCopilotFloating

Switches the assistant-ui sandbox shell without changing your agent runtime.

TrueFalse

DesktopMobile

Frames the sandbox as a phone. The agent and its runtime are untouched.

Tool calls

ExplicitHumanizedOff

Tools are sent and rendered as explicit call cards.

Reasoning group

ShownHiddenOff

Reasoning renders in a collapsible group.

Default state

CollapsedExpanded

Collapsible parts start closed.

Emoji

OnOff

Messages render without an emoji marker.

Soft stream

OnOff

Words arrive tinted, with a caret, and settle into ink.

Response status

OnOff

Copy, rate, speak, regenerate, and timing on hover.

3 usability suggestions
Exploratory, not shippedBeta

Agent

Not connected

Model

DarkLight

No agent connected

Connect Your Agent to Render

1OpenAI compatible URL2Key