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 instructions/assistant-ui/tool-ui/agents-mdgit clone --depth 1 https://github.com/assistant-ui/tool-uiWhat 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 | $0.00513 | $0.00513 |
| Opus 5 | $0.00257 | $0.00257 |
| Sonnet 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 2d 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.
- 2d 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 (773 stars, last pushed 3mo ago), licensed MIT. It adds 513 tokens to every session, about $0.0026 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 2026-08-30.
Other instructions, from other repositories
uview-plus AGENTS.md
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dile-components AGENTS.md
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recharts AGENTS.md
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magicui AGENTS.md
Instructions for magicuidesign/magicui, covering project context, key principles, before writing code, rules and accessibility (a11y).