Borrowing it
Nothing to install: this file belongs to assistant-ui/tool-ui. 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/assistant-ui/tool-ui/main/AGENTS.mdgit clone --depth 1 https://github.com/assistant-ui/tool-uiWrote 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/assistant-ui/tool-ui/agents-md)<a href="https://agentmods.dev/instructions/assistant-ui/tool-ui/agents-md"><img src="https://agentmods.dev/badge/instructions/assistant-ui/tool-ui/agents-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/assistant-ui/tool-ui/agents-md"><img src="https://agentmods.dev/badge/instructions/assistant-ui/tool-ui/agents-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 | $0.00513 | $0.00513 |
| Opus 5.5 | $0.00205 | $0.00205 |
| Sonnet 5.5 | $0.00103 | $0.00103 |
| Haiku 4.5 | $0.00051 | $0.00051 |
Grade A, and why
tool-ui AGENTS.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 — 34 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Cursor Cloud specific instructions
Project overview
Tool UI is a Next.js 16 documentation/demo site and copy-paste component library for AI assistant interfaces. The app lives in apps/www/ within a pnpm monorepo. There is no database, no Docker, and no required background services beyond the Node.js dev server.
Running services
- Dev server:
pnpm dev(Turbopack, port 3000). The static docs, gallery, and component previews work without any API keys. - Chat/Playground features require
OPENAI_API_KEYin.env(see.env.example). Without it the chat API routes return errors, but the rest of the site functions normally.
Commands reference
All standard commands are documented in CLAUDE.md. Key ones:
| Task | Command |
|---|---|
| Dev server | pnpm dev |
| Lint + typecheck + format | pnpm check |
| Tests (Vitest) | pnpm test |
| Fix lint issues | pnpm lint:fix |
| Typecheck only | pnpm typecheck |
Non-obvious caveats
- Typecheck uses
tsgo(@typescript/native-preview), not standardtsc. Thepnpm typecheckcommand runstsgo --noEmit. - Formatter is
oxfmt, not Prettier. Runpnpm formatto format orpnpm format:checkto verify. It handles Tailwind class sorting and import sorting. - Linting is split:
oxlinthandles standard rules;eslintis retained only forno-restricted-syntax,no-restricted-imports, customtool-ui/*rules, and React Compiler hooks.pnpm checkruns both in parallel. pnpm installtriggerspreparewhich sets up git hooks viatsx apps/www/scripts/install-git-hooks.ts. The hooks directory is.githooks/.- Pre-existing lint warnings (60 warnings, 0 errors): these are known oxlint a11y warnings in the codebase and are not regressions.
- Build uses
--experimental-build-mode=compile:pnpm buildrunsnext build --experimental-build-mode=compile.
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 · 34 lines · 513 tokens per session scan A b72df86e80ec
tool-ui AGENTS.md is an instructions file published in the GitHub repository assistant-ui/tool-ui (779 stars, last pushed 1mo ago), licensed MIT. It adds 513 tokens to every session, about $0.0021 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.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.