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Animated caricature of the author

[ Allons-Y ]

Cassondra Roberts | @castastrophe

Allons-y (ah-lo(n)-zee) is an idiomatic French expression meaning roughly, "Let's go!"

That's exactly the energy this venture brings to the web. I'm looking to explore how we deliver web experiences at enterprise scale in a way that empowers developers to work in unison with each other and with their design counterparts.

Nothing makes me happier than exploring new technologies and implementing highly-optimized, clean solutions to complex problems.

Developer experience and accessibility are deeply important to me and these values guide the code that I produce and influence. One of the most enjoyable aspects of my job is open source community management; engaging with and connecting the contributors and consumers.

Projects

I'm proud to have worked on a variety of projects, from open source libraries to enterprise design systems. As a project maintainer and contributor, I'm passionate about building tools that empower developers to build better web experiences, leveraging the latest technologies and techniques so they can focus on what matter most.

Plugins

PostCSS Plugins

These utilities for PostCSS facilitate parsing and publishing enterprise-level design systems code for use in diverse framework ecosystems.

Automation

GitHub Actions

A growing set of GitHub utilities for managing large open source projects. Initial action is a configurable tool for automatically updating open pull requests.

Adobe

Spectrum CSS

A CSS-focused library that expresses the design direction of Adobe's Spectrum design system. It is the foundation of the Spectrum Web Components styling and the internal React Spectrum library.

View the source code

Adobe

Spectrum Web Components

A framework-agnostic component library leveraging web components to implement Adobe's Spectrum design system.

View the source code

Red Hat

PatternFly Elements

A web component implementation of the Red Hat design system. It leverages the encapsulation of ShadowDOM and the power of custom properties to create well-scoped elements that are still designer-friendly.

View the source code

Presentations

Available for speaking, teaching, workshops, and being a podcast or stream guest -
let's get in touch.

Craft Across | 2025

Storybook Integration for Design Systems

A conversation about how design systems can be integrated with Storybook to create a more efficient and joyful development workflow.

CSS Day | 2023

Shining Light on the Shadow DOM

All about the Shadow DOM and how to use it to build better web components.

Slide deck

S01E04.3 | 2023

Web Components in Space

Join us for a fun interview as we talk about how Adobe is using web components in their design system.

DrupalCon | 2019

Unlocking design in a design system with custom properties

A deep-dive on how to leverage custom properties to create a flexible and customizable design system.

DrupalCon | 2019

Make web development fun again, with web components!

A joint presentation with Penn State on how web components can make development workflows fun and efficient.

DrupalCon | 2018

One of these things is not like the other; identifying patterns in a mock-up

An example-rich talk about how to break out mock-ups into patterns for maximum reusability.

Articles

A Storybook format that scales with you

October 31, 2025

Storybook is a powerful and flexible tool but with great power comes great responsibility...to architect a scalable and intuitive approach. In this post, I dive deep into techniques for building a Storybook your developers and users will love.

storybook tooling

AI as a reflection of our values

October 19, 2025

As we examine the flaws in our AI models, we begin to see parallels with the flaws already identified in our own society. What can we learn from these existing critiques and how does it apply to how we train models in the future?

ai