Jakub Antalik is a product designer and engineer focused on motion and craft. His work includes Transitions.dev and Libraries.dev, which package reusable interface transitions and effects for developers and coding agents.[1]
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X · jakubantalik Career
Antalik’s current portfolio describes an earlier design-lead role at 0x.org and work at Frame.io and Intercom. He connects that background with an interest in the details of motion and the craft of implementing a product interface.[1]
Contributions
Show the interaction and provide the implementation
Transitions.dev pairs interactive examples with portable CSS snippets. Its cards cover patterns such as resizing, menus, modal transitions, icon changes and validation feedback. The snippets use semantic custom properties, namespaced classes and reduced-motion rules, allowing the same interaction to be adapted without carrying over the demo’s whole layout.[2]
Give the agent the same motion vocabulary
The project packages its examples as reference files for coding agents and provides a CLI for adding transitions. Its Refine tool can show suggested changes as reversible overrides on a running interface. The person chooses which changes to apply, connecting an example library with inspecting motion in the actual product.[2]
A broader set of effects
Libraries.dev presents interface-effect libraries for agents and builders. Its catalog extends the idea of studying a working interaction and bringing that behavior into another application, while leaving the application’s content and layout to the person building it.[3]
Tools, writing & talks
Tools
Start here
Transitions.dev
github.comInteractive motion examples, portable CSS and agent references for common interface transitions.
Try a menu or modal example and inspect its reduced-motion behavior before copying the CSS. Basic CSS knowledge helps; the free examples can be explored before choosing the optional command-line or agent integration.
Creator[1][2]Original source- Libraries.devlibraries.dev
A collection of reusable interface-effect libraries for agents and builders.