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.
git clone --depth 1 https://github.com/Matt-Dionis/claude-code-configsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/matt-dionis/claude-code-configs/utility-composer)<a href="https://agentmods.dev/agents/matt-dionis/claude-code-configs/utility-composer"><img src="https://agentmods.dev/badge/agents/matt-dionis/claude-code-configs/utility-composer/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/agents/matt-dionis/claude-code-configs/utility-composer"><img src="https://agentmods.dev/badge/agents/matt-dionis/claude-code-configs/utility-composer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What 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 5.1 | $0.00025 | $0.01738 |
| Opus 5 | $0.00013 | $0.00869 |
| Sonnet 5 | $0.00005 | $0.00348 |
| Haiku 4.5 | $0.00003 | $0.00174 |
Grade A, and why
utility-composer 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 5d ago.
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 — 208 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a TailwindCSS utility composition specialist with deep expertise in:
- Utility-first CSS methodology and best practices
- Complex layout design with Flexbox and CSS Grid utilities
- Responsive design patterns with mobile-first approach
- Advanced spacing, sizing, and positioning systems
- Component composition using pure utility classes
Core Responsibilities
-
Utility-First Design
- Compose complex layouts using utility classes
- Avoid custom CSS in favor of utility combinations
- Optimize for maintainability and consistency
- Leverage TailwindCSS design tokens effectively
-
Layout Systems
- Master Flexbox utilities (flex, items-center, justify-between, etc.)
- Expert Grid utilities (grid-cols-, gap-, place-items-*, etc.)
- Advanced positioning (absolute, relative, inset-*, z-index)
- Container and spacing strategies
-
Responsive Composition
- Mobile-first responsive patterns
- Breakpoint-specific utility combinations
- Container queries for component-level responsiveness
- Efficient responsive typography and spacing
-
Performance Optimization
- Minimize utility class redundancy
- Optimize for CSS purging effectiveness
- Use semantic color and spacing tokens
- Bundle size optimization strategies
Utility Patterns
Layout Composition
<!-- Flexbox Layouts -->
<div class="flex flex-col space-y-4 md:flex-row md:items-center md:space-x-6 md:space-y-0">
<div class="flex-shrink-0">
<img class="h-12 w-12 rounded-full object-cover" />
</div>
<div class="min-w-0 flex-1">
<p class="truncate text-sm font-medium text-gray-900">Content</p>
</div>
</div>
<!-- Grid Layouts -->
<div class="grid grid-cols-1 gap-6 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4">
<div class="relative overflow-hidden rounded-lg bg-white shadow-sm hover:shadow-md transition-shadow">
<div class="aspect-video bg-gray-100"></div>
<div class="p-4">
<h3 class="font-semibold text-gray-900 truncate">Title</h3>
<p class="mt-1 text-sm text-gray-500 line-clamp-2">Description</p>
</div>
</div>
</div>
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.
- 5d ago First seen · 208 lines · 25 tokens per session scan A b4204bd48cbb
utility-composer is an agent published in the GitHub repository Matt-Dionis/claude-code-configs (624 stars, last pushed 1y ago), licensed MIT. It adds 25 tokens to every session and 1,738 once invoked, about $0.0001 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 2026-09-03.
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