Fundamental Library Styles is a framework-independent CSS component library for creating SAP web interfaces with reusable styles and components. Developers can use it with Angular, React, Vue, or plain HTML to build consistent SAP applications and apply supported visual themes.
Borrowing it
Nothing to install: this file belongs to SAP/fundamental-styles. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/SAP/fundamental-styles/main/CLAUDE.mdgit clone --depth 1 https://github.com/SAP/fundamental-stylesWrote 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/instructions/sap/fundamental-styles/claude-md)<a href="https://agentmods.dev/instructions/sap/fundamental-styles/claude-md"><img src="https://agentmods.dev/badge/instructions/sap/fundamental-styles/claude-md/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/instructions/sap/fundamental-styles/claude-md"><img src="https://agentmods.dev/badge/instructions/sap/fundamental-styles/claude-md.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 | $0.03162 | $0.03162 |
| Opus 5.5 | $0.01265 | $0.01265 |
| Sonnet 5.5 | $0.00632 | $0.00632 |
| Haiku 4.5 | $0.00316 | $0.00316 |
Grade A, and why
fundamental-styles CLAUDE.md 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 2mo 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 — 359 lines — stays where its author put it; the contents beside it link to each section on GitHub.
fundamental-styles
CSS component library for SAP Design System. Framework-agnostic, works with any web technology.
For AI Agents
Component documentation is auto-generated from Storybook stories and available in structured markdown:
- 📚 Complete Component Index: docs/components/README.md - All 140+ components
- 📖 Per-Component Docs:
docs/components/{component-name}.md- Detailed examples with modifiers - 🔧 Integration Guide: docs/AI_USAGE.md - How to use these docs in AI tools
- 📋 Schemas:
docs/schemas/*.json- Component structure definitions - ♿ Accessibility:
docs/accessibility.json- ARIA patterns for all components
When generating HTML/CSS, always reference the component-specific markdown file for:
- Complete list of modifiers (
fd-{component}--{modifier}) - State classes (
is-error,is-disabled, etc.) - Correct HTML structure and nesting
- Accessibility requirements (ARIA attributes)
Example workflow:
- User asks for a button → Read docs/components/button.md
- Find the right modifier (e.g.,
fd-button--emphasizedfor primary action) - Generate HTML with proper structure and ARIA attributes
Using the MCP Server:
If you have the fundamental-styles MCP server available, use these tools:
get_component_markdown- Get complete markdown documentation with all HTML examplesget_component_html- Get specific HTML variantslist_components- Browse all available componentssearch_components- Find components by keyword
Using Skills:
Type /component-docs to browse component documentation interactively.
Quick Lookup - "I need a..."
| Need | Component | Class |
|---|---|---|
| Button | button | fd-button |
| Text input | input | fd-input |
| Dropdown/Select | select | fd-select |
| Checkbox | checkbox | fd-checkbox |
| Radio button | radio | fd-radio |
| Toggle switch | switch | fd-switch |
| Link | link | fd-link |
| Modal/Popup | dialog | fd-dialog |
| Tooltip | popover | fd-popover |
| Dropdown menu | menu | fd-menu |
| Data table | table | fd-table |
| List of items | list | fd-list |
| Card/Tile | card | fd-card |
| Tabs | tabs | fd-tabs |
| Alert/Banner | alert, message-strip | fd-alert, fd-message-strip |
| Loading spinner | busy-indicator | fd-busy-indicator |
| Form field | form-item | fd-form-item |
| Icon | icon | sap-icon--{name} |
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.
- 2mo ago First seen · 359 lines · 3,162 tokens per session scan A 3b8b62a84e44
fundamental-styles CLAUDE.md is an instructions file published in the GitHub repository SAP/fundamental-styles (276 stars, last pushed today), licensed Apache-2.0. It adds 3,162 tokens to every session, about $0.0126 per session on Opus 5.5. 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 2026-08-30.
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