microsoft/Build26-BRK242-turn-your-agents-into-action-connect-tools-apis-and-documents contains Microsoft Build 2026 session resources about connecting AI agents to tools, APIs, and documents through governed tool selection. It is intended for developers building agents that need efficient access to MCP servers, A2A, OpenAPI, connectors, built-in tools, and structured content from multimodal files. The catalogue add-ons are session instructions for exploring these agent-building patterns.
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 skills add microsoft/Build26-BRK242-turn-your-agents-into-action-connect-tools-apis-and-documents --skill ui-designergit clone --depth 1 https://github.com/microsoft/Build26-BRK242-turn-your-agents-into-action-connect-tools-apis-and-documentsWrote 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/microsoft/build26-brk242-turn-your-agents-into-action-connect-tools-apis-and-documents/ui-designer)<a href="https://agentmods.dev/skills/microsoft/build26-brk242-turn-your-agents-into-action-connect-tools-apis-and-documents/ui-designer"><img src="https://agentmods.dev/badge/skills/microsoft/build26-brk242-turn-your-agents-into-action-connect-tools-apis-and-documents/ui-designer/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/skills/microsoft/build26-brk242-turn-your-agents-into-action-connect-tools-apis-and-documents/ui-designer"><img src="https://agentmods.dev/badge/skills/microsoft/build26-brk242-turn-your-agents-into-action-connect-tools-apis-and-documents/ui-designer.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 | $0.00020 | $0.00449 |
| Opus 5.5 | $0.00008 | $0.00180 |
| Sonnet 5.5 | $0.00004 | $0.00090 |
| Haiku 4.5 | $0.00002 | $0.00045 |
Grade A, and why
UI Designer 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.
What it actually says
UI Designer Skill
You are a specialist in building the chat interface for this project. Follow these patterns:
Tech Stack
- React 18+ with functional components and hooks
- TypeScript (strict mode)
- Tailwind CSS v4 for styling (utility-first, no separate CSS files per component)
- Vite for dev server and bundling
Component Patterns
Chat Components
ChatPanel— main container with message list, auto-scrolls to latest messageMessageBubble— renders user (right-aligned, blue) and assistant (left-aligned, gray) messagesChatInput— input bar with send button, disabled while streamingActivitySidebar— collapsible panel showing real-time tool invocations
Message Rendering
- Use
react-markdownwithremark-gfmfor assistant messages - Support code blocks with syntax highlighting
- Handle streaming: messages append content as chunks arrive
Streaming UX
- The frontend calls
POST /api/chatand reads newline-delimited JSON events - Parse event types:
message(text chunks),activity(tool events),citation(sources) - Show a typing indicator while streaming
- Activity events appear in the sidebar in real-time with status badges (pending → running → complete)
File Organization
ui/src/
├── api/client.ts # Streaming fetch client
├── components/ # React components
├── hooks/useChat.ts # Chat state management
├── App.tsx # Root layout
├── main.tsx # Entry point
└── index.css # Tailwind imports
Styling Guidelines
- Use Tailwind utility classes exclusively
- Dark mode support via
dark:variants - Responsive: sidebar collapses on mobile
- Use
bg-white dark:bg-gray-900base palette - Smooth transitions for sidebar toggle and message appearance
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 First seen · 53 lines · 20 tokens per session scan A 7bea424e4c01
UI Designer is a skill published in the GitHub repository microsoft/Build26-BRK242-turn-your-agents-into-action-connect-tools-apis-and-documents (10 stars, last pushed 2mo ago), licensed MIT. It adds 20 tokens to every session and 449 once invoked, about $0.0001 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 2026-08-31.
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