trycua/cua is a toolkit for building and testing AI agents that operate computers by seeing screens, clicking controls, and typing across operating systems and virtual machines. It serves agent developers, benchmark authors, and teams generating training data for computer-use models. Catalogue add-ons provide ways to operate Cua drivers and related agent workflows.
Borrowing it
Nothing to install: this file belongs to trycua/cua. 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/trycua/cua/main/AGENTS.mdgit clone --depth 1 https://github.com/trycua/cuaWrote 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/trycua/cua/agents-md)<a href="https://agentmods.dev/instructions/trycua/cua/agents-md"><img src="https://agentmods.dev/badge/instructions/trycua/cua/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/trycua/cua/agents-md"><img src="https://agentmods.dev/badge/instructions/trycua/cua/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 | $0.02621 | $0.02621 |
| Opus 5.5 | $0.01048 | $0.01048 |
| Sonnet 5.5 | $0.00524 | $0.00524 |
| Haiku 4.5 | $0.00262 | $0.00262 |
Grade A, and why
cua 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 today.
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 — 212 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Repository agent guidance
Contributor authorship
Follow Preserve Contributor Authorship.
- A
Salvaged from #<pr>source pull request must differ from the landing pull request. - When adapting a contribution directly in its existing pull request, keep the
contributor as the commit author and credit adapting authors with
Co-authored-bytrailers instead of citing the pull request as its own source. - Use GitHub-linked or GitHub noreply email addresses for commit authors and coauthors so the contributor-attribution check can resolve each identity.
- Tell the source contributor where their work shipped.
Do not reimplement submitted work solely to remove its authorship history.
Issue and pull request workflow
Follow the contribution and selection contract in
CONTRIBUTING.md,
MAINTAINERS.md, the
GitHub issue forms, rfcs/README.md, and
SECURITY.md. Keep those files canonical instead of duplicating
their field lists, polling ladder, or RFC lifecycle here.
Coding agents act as workers within that contract, not as a planning authority. GitHub holds the durable record: the issue or RFC carries the problem and the decision, and the pull request carries the execution. Local schedulers, queues, and worktree tooling are private conveniences; a reviewer must not need them to understand, reproduce, or continue the work.
- when the authenticated GitHub account has write access, create and push the work branch directly in the canonical repository. Do not default to a personal fork merely because a fork remote exists. Use a fork only when write access is unavailable or the maintainer explicitly requests one, and verify the pull request head owner before reporting it;
- avoid noisy periodic status comments; keep progress in the linked pull request description; and
- route suspected vulnerabilities through the private process in
SECURITY.md, never a public issue, RFC, pull request, log, or screenshot.
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.
- today Changed · +9 lines · +133 tokens per session 3ac5e2c48b65
- yesterday Changed · +23 lines · +401 tokens per session c1665a1966d0
- 2d ago Changed · +14 lines · +205 tokens per session 669317e1f34d
- 8d ago Changed · -1 lines · -16 tokens per session 6eb04307c1b5
- 17d ago Changed · +36 tokens per session 0792c243f821
- 18d ago Changed · -3 tokens per session df542b76aa96
- 1mo ago Changed · +20 lines · +276 tokens per session 9fcdf02e1074
- 1mo ago Changed · +21 lines · +278 tokens per session 507f006eb5ea
- 1mo ago Changed · -65 lines · -871 tokens per session d90a160e7269
- 1mo ago First seen · 191 lines · 2,182 tokens per session scan A b374714d477e
cua AGENTS.md is an instructions file published in the GitHub repository trycua/cua (31,822 stars, last pushed today), licensed MIT. It adds 2,621 tokens to every session, about $0.0105 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.
cua AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| cua AGENTS.mdtrycua/cua | Instructions file | 32k | today | MIT | A | 2,621 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |