Beyond the sparkle: giving thinking, tool calls, and retrieval their own icons

Glittering_Device653 · reddit · 2026-08-27

A designer sparked a discussion on the missing visual language of agent UIs: the sparkle has become the universal symbol for "AI" — on rewrite buttons, autocomplete, summarizers, and agents that spent 40 seconds calling six tools, all with the same sparkle, so users can't tell "thinking" from "tool call" from "retrieval".

His thesis: sparkle should mean only "a model generated this" — a provenance marker, not a feature badge. Retrieval, tool calls, handoffs, and guardrails each deserve their own shape so users can tell them apart when things go wrong.

Practical details:

"Agent" is the hardest icon: a robot reads as a toy, a person reads as a user (exactly wrong); he settled on a consistent ring
He renders every icon to a 24px bitmap and computes pairwise overlap — 19 pairs were essentially indistinguishable at real usage size (compile/terminal/shell/run script all converge to the same shape)
Some concepts may be undrawable: chunk overlap, context budget, attention head, best-of-n, ablation

He open-sourced his icon set IconMind (MIT, free, no paid tier).

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Beyond the sparkle: giving thinking, tool calls, and retrieval their own icons

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