css-optimizer vs Atomic CSS
css-optimizer is no longer listed on any marketplace we read: these are its last known data, as of 2026‑10‑18.
css-optimizer is a plugin bundle for AI coding tools published by barnburner121. No marketplace we read lists it any more. Atomic CSS is an MCP server published by Yoodaekyung. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-23. A plugin in this pair is no longer listed on any marketplace we read, so search engines are asked not to index the page.
Where each is published
| Marketplace |  Atomic CSS | |
|---|---|---|
| Community marketplace barnburner121/claude-plugin-marketplace | Removed on 2026-10-18 Version: 1.0.0 Forks (GitHub): 0 Stars (GitHub): 3 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 1.0.1 No figure published Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | css-optimizerno longer listed · | Atomic CSS |
|---|---|---|
| Marketplaces that list it (differs) | 0 | 1 |
| Stars (GitHub) (differs) | 3 | No figure on GitHub |
| Forks (GitHub) (differs) | 0 | No figure on GitHub |
| Last release | Not published | Not published |
| Where it runs (differs) | On your machine (@barnburner121/plugin-hub-mcp) | Remote server (atomiccss.dev/mcp) |
| Transport (differs) | Not stated | SSE |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Parts of the bundle (differs) | 2 | Not a bundle |
| Licence (differs) | MIT | Not stated |
| Repository (differs) | github.com/barnburner121/claude-plugin-marketplace | Not stated |
| Changes in the last 7 days (differs) | 2 | 0 |
| First seen (differs) | 2026-10-14 | 2026-10-11 |
| Endpoint at the last check (differs) | no remote endpoint we check | Responded 21 h ago |
Lines where the two differ have a tinted background and bold values. No value is marked better or worse: a plugin no marketplace lists any more is shown with its last known data, which we do not rank against current figures.
What to use instead of css-optimizer
Plugins still listed whose own names, descriptions, tools and skills are closest in meaning to it. Comparable, not endorsed.
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Tailwind CSS v4 tools for initialization, auditing, migration, and optimization
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Analyze and optimize code performance, identify bottlenecks, and suggest improvements
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CSS development workflows with Tailwind composition, semantic naming, and dark mode by default
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Design system extractor, applier, and builder — analyze any URL, apply to your project, or build from scratch with deterministic CSS + §18 DON'T grep contract
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73 deterministic slop guards + /gesso:critique second-opinion reviews for HTML/CSS.
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Bundle size analysis and optimization for web applications
What each says it does
css-optimizer
Find unused CSS and optimize stylesheets
Atomic CSS
Utility CSS for any platform — near-zero learning curve. Built for developers and AI alike
How to run each
css-optimizer
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
Atomic CSS As a remote MCP server
claude mcp add --transport sse atomic-css https://atomiccss.dev/mcpCommands built only from what the marketplaces declare; the full set for every client is on each card.
Only Atomic CSS has a remote endpoint we check. How we check endpoints
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: css-optimizer · What it can do: Atomic CSS · Compare two other plugins
Data comes from public marketplace files in GitHub repositories of their authors. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.