Cloudflare Agents is a framework for building persistent, stateful AI agents on Cloudflare Durable Objects, where each agent has its own state, storage, and lifecycle. Developers use it to create agents with real-time communication, scheduling, model calls, MCP, workflows, and other server-side capabilities. The catalogue entries provide agent, skill, MCP, and instruction components for this framework.
Borrowing it
Nothing to install: this file belongs to cloudflare/agents. 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/cloudflare/agents/main/AGENTS.mdgit clone --depth 1 https://github.com/cloudflare/agentsWrote 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/cloudflare/agents/agents-md)<a href="https://agentmods.dev/instructions/cloudflare/agents/agents-md"><img src="https://agentmods.dev/badge/instructions/cloudflare/agents/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/cloudflare/agents/agents-md"><img src="https://agentmods.dev/badge/instructions/cloudflare/agents/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 | $0.02311 | $0.02311 |
| Opus 5.5 | $0.00924 | $0.00924 |
| Sonnet 5.5 | $0.00462 | $0.00462 |
| Haiku 4.5 | $0.00231 | $0.00231 |
Grade A, and why
agents 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 — 209 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Project overview
Cloudflare Agents SDK — a framework for building stateful AI agents on Cloudflare Workers. This is a monorepo containing the core SDK packages, examples, guides, sites, and documentation.
Repository structure
packages/ # Published npm packages (need changesets for changes)
agents/ # Core SDK (see packages/agents/AGENTS.md)
ai-chat/ # @cloudflare/ai-chat — higher-level AI chat agent
hono-agents/ # Hono framework integration
codemode/ # @cloudflare/codemode — experimental code generation
examples/ # Self-contained demo apps (see examples/AGENTS.md)
playground/ # Main showcase app — all SDK features in one UI (uses Kumo design system)
mcp/ # MCP server example
mcp-client/ # MCP client example
... # ~20 examples total
experimental/ # Work-in-progress experiments (not published, no stability guarantees)
site/ # Deployed websites
agents/ # agents.cloudflare.com (Astro)
ai-playground/ # Workers AI playground (React + Vite)
guides/ # In-depth pattern tutorials with narrative READMEs (see guides/AGENTS.md)
anthropic-patterns/
human-in-the-loop/
openai-sdk/ # Examples using @openai/agents SDK
basic/ chess-app/ handoffs/ human-in-the-loop/ ...
docs/ # Markdown docs for developers.cloudflare.com (see docs/AGENTS.md)
design/ # Architecture and design decision records (see design/AGENTS.md)
scripts/ # Repo-wide tooling (typecheck, export checks, update checks)
Nested AGENTS.md files
Some directories have their own AGENTS.md with deeper guidance:
| File | Scope |
|---|---|
packages/agents/AGENTS.md |
Core SDK internals — exports, source layout, build, testing, architecture |
examples/AGENTS.md |
Example conventions — required structure, consistency rules, known issues |
guides/AGENTS.md |
Guide conventions — how guides differ from examples, README expectations |
docs/AGENTS.md |
Writing user-facing docs — Diátaxis framework, upstream sync, style |
design/AGENTS.md |
Design records and RFCs — format, workflow, relationship to docs |
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 · +2 lines · +52 tokens per session 93b7ec13584d
- 2d ago Changed · +22 tokens per session a933a802e52d
- 9d ago Changed · +43 tokens per session 4780157e1cc7
- 23d ago Changed · -14 tokens per session 84c635d7995d
- 29d ago Changed · +10 lines · +77 tokens per session bb33b6bfe35d
- 2mo ago First seen · 197 lines · 2,131 tokens per session scan A ddb2ad5f8953
agents AGENTS.md is an instructions file published in the GitHub repository cloudflare/agents (5,956 stars, last pushed yesterday), licensed MIT. It adds 2,311 tokens to every session, about $0.0092 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.
agents AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| agents AGENTS.mdcloudflare/agents | Instructions file | 6.0k | yesterday | MIT | A | 2,311 | 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 |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| 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 |