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 skills/madappgang/claude-code/css-modulesnpx skills add MadAppGang/claude-code --skill css-modulesgit clone --depth 1 https://github.com/MadAppGang/claude-codeWrote 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/skills/madappgang/claude-code/css-modules)<a href="https://agentmods.dev/skills/madappgang/claude-code/css-modules"><img src="https://agentmods.dev/badge/skills/madappgang/claude-code/css-modules.svg" alt="Measured on agentmods" 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 | $0.00052 | $0.03333 |
| Opus 5 | $0.00026 | $0.01666 |
| Sonnet 5 | $0.00010 | $0.00667 |
| Haiku 4.5 | $0.00005 | $0.00333 |
Grade A, and why
css-modules 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- css-modules — 94% identical, 6 lines differ
How it starts
The opening of the file, as written. The whole thing — 600 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CSS Modules
Overview
CSS Modules provide locally-scoped CSS by automatically generating unique class names at build time. This prevents style conflicts and enables true component encapsulation.
When to Use CSS Modules
| Use Case | CSS Modules | Tailwind |
|---|---|---|
| Complex animations | Best | Good |
| Third-party component styling | Best | Harder |
| Legacy CSS migration | Best | Refactor needed |
| Rapid prototyping | Slower | Best |
| Design system utilities | Not ideal | Best |
| Component encapsulation | Best | N/A |
| Team with CSS expertise | Best | Either |
Hybrid Approach: Use both together - Tailwind for utilities, CSS Modules for complex components.
Documentation Index
Vite Integration
| Topic | URL | Description |
|---|---|---|
| CSS Modules in Vite | https://vite.dev/guide/features#css-modules | Vite's built-in support |
| Lightning CSS | https://vite.dev/guide/features#lightning-css | Fast CSS transforms |
| PostCSS | https://vite.dev/guide/features#postcss | PostCSS configuration |
Lightning CSS
| Topic | URL | Description |
|---|---|---|
| Documentation | https://lightningcss.dev/docs.html | Official docs |
| CSS Modules | https://lightningcss.dev/css-modules.html | Module support |
| Transpilation | https://lightningcss.dev/transpilation.html | Browser targeting |
| Bundling | https://lightningcss.dev/bundling.html | CSS bundling |
CSS Modules Spec
| Topic | URL | Description |
|---|---|---|
| CSS Modules | https://github.com/css-modules/css-modules | Specification |
| Composition | https://github.com/css-modules/css-modules#composition | Composing classes |
| Scoping | https://github.com/css-modules/css-modules#naming | Local vs global |
TypeScript Integration
| Topic | URL | Description |
|---|---|---|
| typed-css-modules | https://github.com/Quramy/typed-css-modules | Generate .d.ts files |
| vite-plugin-css-modules-dts | https://github.com/mrcjkb/vite-plugin-css-modules-dts | Vite plugin |
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 · 600 lines · 52 tokens per session scan A 0a5178b82cd8
css-modules is a skill published in the GitHub repository MadAppGang/claude-code (279 stars, last pushed 5mo ago), licensed MIT. It adds 52 tokens to every session and 3,333 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 2026-09-03.
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