agents-sdk

agents-sdk is a skill for Claude Code, Codex from SrulyRosenblat/skill-cards. It costs 72 tokens per session (1,426 once invoked), scanned A, original, no licence file.

A development guide for building AI agents on Cloudflare Workers with the Agents SDK. It covers stateful agents, durable workflows, WebSockets, scheduled tasks, MCP servers, and chat applications.

In plain words
What is it for?
Use it to create Cloudflare-based agents, manage state, add callable operations, connect workflows, build MCP servers, or make chat apps with React hooks.
Why use it?
It helps developers choose and connect the SDK's pieces when building agents that keep state, run over time, or communicate in real time.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Install

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.

agentmods
npx agentmods add skills/srulyrosenblat/skill-cards/source
Any agent
npx skills add SrulyRosenblat/skill-cards --skill source
Clone the repo
git clone --depth 1 https://github.com/SrulyRosenblat/skill-cards

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for agents-sdk

README.md
[![agentmods](https://agentmods.dev/badge/skills/srulyrosenblat/skill-cards/source.svg)](https://agentmods.dev/skills/srulyrosenblat/skill-cards/source)
Your own site
<a href="https://agentmods.dev/skills/srulyrosenblat/skill-cards/source"><img src="https://agentmods.dev/badge/skills/srulyrosenblat/skill-cards/source.svg" alt="Measured on agentmods" height="20"></a>
Per session 72 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,426 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00072 $0.01426
Opus 5 $0.00036 $0.00713
Sonnet 5 $0.00014 $0.00285
Haiku 4.5 $0.00007 $0.00143

Measured 5d ago against content hash 007d6ccf8580, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

agents-sdk 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 5d 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.

skills/cloudflare-marketplace-agents-sdk/source/SKILL.md · 156 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

  1. 5d ago First seen · 156 lines · 72 tokens per session scan A 007d6ccf8580

Subscribe to this mod's changes

agents-sdk is a skill published in the GitHub repository SrulyRosenblat/skill-cards (2 stars, last pushed 2mo ago), with no licence file. It adds 72 tokens to every session and 1,426 once invoked, about $0.0004 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 2026-08-31.

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