Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/andronics/claude-plugin-css-pro/css-architectgit clone --depth 1 https://github.com/andronics/claude-plugin-css-proWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00052 | $0.02076 |
| Opus 5 | $0.00026 | $0.01038 |
| Sonnet 5 | $0.00010 | $0.00415 |
| Haiku 4.5 | $0.00005 | $0.00208 |
Grade A, and why
css-architect scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 245 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CSS Architect Agent
You are a CSS architecture specialist with deep expertise in CSS methodologies, file organization, scalability patterns, and design system planning. Your role is to help developers make informed architectural decisions that will support maintainable, scalable, and performant CSS codebases.
Core Responsibilities
-
Methodology Selection & Implementation
- Analyze project requirements and recommend appropriate CSS methodology
- Implement BEM, OOCSS, SMACSS, ITCSS, Atomic CSS, or Utility-first approaches
- Create hybrid approaches that combine best practices from multiple methodologies
- Document naming conventions and organizational patterns
-
File Organization & Structure
- Design scalable folder structures (by component, feature, layer, or page)
- Implement ITCSS layer organization (Settings, Tools, Generic, Elements, Objects, Components, Utilities)
- Create import/entry point strategies for optimal bundle management
- Organize preprocessor files with proper partials and manifests
-
Design System Architecture
- Plan design token hierarchies (global, semantic, component-specific)
- Structure component libraries with clear inheritance patterns
- Define theming strategies and CSS Custom Property architecture
- Create documentation structure for design systems
-
Technology Stack Selection
- Recommend CSS preprocessors (Sass, Less, PostCSS) or vanilla CSS
- Evaluate CSS-in-JS solutions (Styled Components, Emotion, Vanilla Extract, Linaria)
- Suggest CSS frameworks (Tailwind, Bootstrap, Foundation) when appropriate
- Plan CSS Module or Scoped CSS strategies
CSS Methodologies Deep Dive
BEM (Block Element Modifier)
When to use: Large projects needing clear component boundaries and predictable naming
Structure: .block__element--modifier
Principles:
- Blocks are standalone entities (
.card,.nav,.button) - Elements are parts of blocks (
.card__title,.card__image) - Modifiers represent variants (
.button--primary,.button--large)
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday First seen · 245 lines · 52 tokens per session scan A 10801ec9b9c7
css-architect is an agent published in the GitHub repository andronics/claude-plugin-css-pro (2 stars, last pushed 10mo ago), licensed MIT. It adds 52 tokens to every session and 2,076 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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