A coding reference for building React user interfaces with Fluent UI React v9, Microsoft's component library. It covers setup, themes, styling, accessibility, component interfaces, and verified examples.

Use it when adding Fluent UI buttons, inputs, dialogs, data grids, themes, or styles to a React application.

It reduces mistakes such as using the wrong package version, inventing component options, or copying unsupported code.

How blendsdk/fluentui-mcp configures Claude Code and Codex

Reuse

Borrowing it

Nothing to install: this file belongs to blendsdk/fluentui-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/blendsdk/fluentui-mcp/master/.agents/skills/fluentui/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/blendsdk/fluentui-mcp

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/blendsdk/fluentui-mcp/fluentui/github.svg)](https://agentmods.dev/skills/blendsdk/fluentui-mcp/fluentui)

Your own site

<a href="https://agentmods.dev/skills/blendsdk/fluentui-mcp/fluentui"><img src="https://agentmods.dev/badge/skills/blendsdk/fluentui-mcp/fluentui/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/blendsdk/fluentui-mcp/fluentui"><img src="https://agentmods.dev/badge/skills/blendsdk/fluentui-mcp/fluentui.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,305 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00061	$0.01305
Opus 5.5	$0.00024	$0.00522
Sonnet 5.5	$0.00012	$0.00261
Haiku 4.5	$0.00006	$0.00130

Measured 1mo ago against content hash 32299929886d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

fluentui 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 1mo 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.

.agents/skills/fluentui/SKILL.md · 106 lines

How it starts

The opening of the file, as written. The whole thing — 106 lines — stays where its author put it; the contents beside it link to each section on GitHub.

FluentUI React v9

This skill teaches you to build user interfaces with FluentUI React v9. The knowledge base is bundled offline: every component page, category guide, and task recipe lives under references/ next to this file. Read the relevant reference before writing code, and copy patterns from the verified examples rather than guessing.

Hard rules

Check the installed version first. Run npm ls @fluentui/react-components (or read package.json) before writing code. This skill targets v9.
Import from the documented entry points. Components come from @fluentui/react-components; icons come from @fluentui/react-icons. Do not import from an internal @fluentui/react-* package unless a reference page says to.
Never invent a prop. If a prop is not listed on the component's reference page, do not pass it. Look up the real name in references/components/<component>.md.
Prefer the verified examples. Each component page renders examples taken from FluentUI's own Storybook source. Start from one of those and adapt it.
Wrap the tree in FluentProvider. Theming, tokens, and right-to-left all depend on it. See references/foundation/fluent-provider.md.
Style with Griffel and tokens. Use makeStyles and the design tokens in tokens, not hard-coded colors or spacing. See references/foundation/styling-griffel.md.
Accessibility is part of the task. Every interactive element needs a label, keyboard support, and correct roles. See references/foundation/accessibility.md.
Disclose the covered version and stay inside it. Answer from what this skill version covers — see ## Source & versions in references/index.md. State the covered Fluent UI version, list the reference files you used, and if a component, prop, or API is not present in the references, say it is not covered by this skill version instead of guessing.

How to route a task

If the task is about…	Read
Setting up a project, imports, or the provider	`references/foundation/getting-started.md`, `references/foundation/fluent-provider.md`
Theming, dark mode, tokens, or RTL	`references/foundation/theming.md`, `references/quick-reference/styling-tokens.md`
Writing styles with Griffel	`references/foundation/styling-griffel.md`
A specific component's props or examples	`references/components/<component>.md`
A whole class of controls (all buttons, all inputs)	`references/categories/<category>.md`
A concrete job such as a login form or a data table	`references/recipes/<group>/<recipe>.md`
A short cheat sheet or checklist	`references/quick-reference/<topic>.md`
An overview of everything available	`references/index.md`

Read the full file on GitHub · 106 lines

Files

What ships with it

60 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

1mo ago Changed · +5 lines 32299929886d
1mo ago First seen · 101 lines · 61 tokens per session scan A ab32a0ad62eb

Subscribe to this mod's changes

fluentui is a skill published in the GitHub repository blendsdk/fluentui-mcp (6 stars, last pushed 1mo ago), licensed MIT. It adds 61 tokens to every session and 1,305 once invoked, about $0.0002 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 2026-09-21.

Frontend React ai-assistant claude design-system developer-tools documentation fluent-ui

fluentui next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
fluentuiblendsdk/fluentui-mcp	Skill	6	1mo ago	MIT	A	61	Claude Code, Codex
material-ui-nextjsmui/material-ui	Skill	99k	yesterday	MIT	A	76	Claude Code, Codex
material-ui-stylingmui/material-ui	Skill	99k	yesterday	MIT	A	52	Claude Code, Codex
material-ui-tailwindmui/material-ui	Skill	99k	yesterday	MIT	A	67	Claude Code, Codex
fast-typescript-checkinternet-development/www-sacred	Skill	1.6k	2d ago	MIT	A	84	Claude Code, Codex
port-sacred-terminal-ui-to-react-using-same-conventionsinternet-development/www-sacred	Skill	1.6k	2d ago	MIT	A	0	Claude Code, Codex
port-sacred-terminal-ui-to-typescript-cliinternet-development/www-sacred	Skill	1.6k	2d ago	MIT	A	0	Claude Code, Codex

fluentui-mcp: Skill for Claude Code