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/cloudflare/computer/agents-mdgit clone --depth 1 https://github.com/cloudflare/computerWhat 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 | $0.02240 | $0.02240 |
| Opus 5 | $0.01120 | $0.01120 |
| Sonnet 5 | $0.00448 | $0.00448 |
| Haiku 4.5 | $0.00224 | $0.00224 |
Grade A, and why
computer 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 — 185 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent guidelines
Read these first
README.md— what this repo is and how the pieces fit together.CONTRIBUTING.md— public contribution paths.COLLABORATORS.md— setup, checks, commit and pull request conventions. The canonical source for the day-to-day workflow.docs/README.md— design specification. Forward- looking; treat as intent, not as a description ofmain.docs/08_capnweb_interface.md— the RPC contract between the Durable Object andcomputerd. Required reading before touchingpackages/rpcorpackages/computer.- Each package's own
README.md— implementation status and package-specific notes.
Skills
In-repo skills live under .agents/skills/. Load
the file directly when the trigger applies:
| Skill | Load when |
|---|---|
prose |
Writing code comments, commit messages, READMEs, or documentation. |
pull-requests |
Writing or editing a pull request description. |
test-driven-development |
Implementing logic, fixing a bug, or changing behavior. |
capnweb |
Touching anything that crosses the RPC boundary: packages/rpc, packages/computer, the computerd client, or the Durable Object server. |
cloudflare |
Index of host-side Cloudflare skills — Workers, Durable Objects, wrangler, sandbox SDK, agents SDK. |
Environment setup
A fresh container does not have everything the tests need. The traps below cost real time if you discover them one failure at a time.
Native build tools. packages/computerd depends on fuse-native, a
native addon. Building it needs a C toolchain and the libfuse2 headers.
On Debian or Ubuntu:
apt-get install build-essential libfuse-dev
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 · 185 lines · 2,240 tokens per session scan A 6a5aab8dc858
computer AGENTS.md is an instructions file published in the GitHub repository cloudflare/computer (8,834 stars, last pushed 4d ago), licensed MIT. It adds 2,240 tokens to every session, about $0.0112 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
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
buildNext
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
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, applying the notice (cutover) and fallback chain (never fail the build).
spec-kit AGENTS.md
Instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.
langchain 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.