--- title: "Cloudflare Agents SDK: review, setup & limitations · Undominated.ai" canonical: https://undominated.ai/skills/cloudflare-agents-sdk/ description: "Guides stateful Cloudflare agent applications through current SDK documentation, persistence, scheduling and approval-aware tool flows." --- # Cloudflare Agents SDK: review, setup & limitations · Undominated.ai > Guides stateful Cloudflare agent applications through current SDK documentation, persistence, scheduling and approval-aware tool flows. [← Explore all skills](/skills/) AGENT DEVELOPMENT / Cloudflare # Cloudflare Agents SDK Guides stateful Cloudflare agent applications through current SDK documentation, persistence, scheduling and approval-aware tool flows. See setup guidance ↓Original source ↗ SOURCE REVIEW Reviewed 2026-09-21 Evidence 7 linked sources Publisher Cloudflare Licence Apache-2.0 ↗ Revision b052c32bab7d Read what was—and wasn’t—checked ↓ “Build, debug, or review Cloudflare Agents SDK applications using the agents package.” Cloudflare · upstream description ↗ Our analysis follows below. 01 / THE REASONING ## Why this made the selection. - Treats installed SDK versions and current docs as the basis for implementation. - Explains the difference between synchronized state, database history, chat-tool approvals and durable-workflow pauses. ### A good fit for - Building a persistent agent on Cloudflare Workers - Adding scheduled work or an approval step to an agent application ### Weigh up before choosing - This is specific to Cloudflare’s Agents SDK and runtime, not a general multi-provider agent framework. - Experimental browser, voice and higher-level APIs need current documentation and may change. - Installing the skill does not configure authentication, deploy resources or verify an agent application. 02 / THE REVIEW RECORD ## What we actually inspected. Source review has boundaries. A clear record is more useful than a “safe” badge. ### Material inspected - skills/agents-sdk/SKILL.md - skills/agents-sdk/references/human-in-the-loop.md - skills/agents-sdk/references/state-scheduling.md - LICENSE ### Our findings - The definition checks SDK installation, bindings and migrations and warns against editing old migration tags. - The state reference separates validation of proposed updates from reactions to accepted changes. - The human-in-the-loop reference distinguishes approval responses from client tool outputs and calls for timeout handling before gated work. ### Not established by this review - Source inspection only; no skill installation or workflow execution was performed. The review applies to the material and revision named here. A newer upstream release can change its behavior. 03 / PUT IT TO WORK ## Add a skill to your workflow. Upstream setup instructions ↗ DOCUMENTED COMMAND npx skills add https://github.com/cloudflare/skills/tree/b052c32bab7dd493513260228a36c88294f343f1/skills/agents-sdk Copy command ↗ Copying does not execute this command. It may retrieve a newer version than the reviewed source. - Install the complete skill directory with its references and helpers; a copied SKILL.md alone may be incomplete. - Choose the intended agent and project scope in the installer, then review its permissions before using the skill. ### Before you start - Node.js/npm for this installer - An agent that supports the Agent Skills format - A configured Workers project - Cloudflare account access for deployment and provider credentials where used ### Compatibility Cloudflare Workers and agents package · Compatible JavaScript/TypeScript coding agents ### Read and edit agent code, bindings and migrations - Read and edit agent code, bindings and migrations - Optional deployment to persistent cloud resources - Configured agents may store data, invoke tools or contact external model services ### Cost model The skill is Apache-licensed; Workers resources, storage and any model/provider services are billed independently. 04 / FOLLOW THE EVIDENCE ## The source trail. Our notes are separate from the original resource. Check upstream before adopting a new version. - Skill definition at reviewed revision ↗ Checked 2026-09-21 https://github.com/cloudflare/skills/blob/b052c32bab7dd493513260228a36c88294f343f1/skills/agents-sdk/SKILL.md Supports: summary, upstreamDescription, whySelected, bestFor, limitations, review, compatibility, access - Reviewed reference or helper: references/human-in-the-loop.md ↗ Checked 2026-09-21 https://github.com/cloudflare/skills/blob/b052c32bab7dd493513260228a36c88294f343f1/skills/agents-sdk/references/human-in-the-loop.md Supports: review, limitations, access - Reviewed reference or helper: references/state-scheduling.md ↗ Checked 2026-09-21 https://github.com/cloudflare/skills/blob/b052c32bab7dd493513260228a36c88294f343f1/skills/agents-sdk/references/state-scheduling.md Supports: review, limitations, access - Upstream license or licensing declaration ↗ Checked 2026-09-21 https://github.com/cloudflare/skills/blob/b052c32bab7dd493513260228a36c88294f343f1/LICENSE Supports: license - Publisher installation and project documentation ↗ Checked 2026-09-21 https://github.com/cloudflare/skills/blob/b052c32bab7dd493513260228a36c88294f343f1/README.md Supports: install, compatibility, access - Skills installer source formats and selective installation ↗ Checked 2026-09-21 https://github.com/vercel-labs/skills/blob/7407f3893ad4dceab546ac002c3ef806e4000c73/README.md Supports: install - Installer implementation: full commit SHA fallback ↗ Checked 2026-09-21 https://github.com/vercel-labs/skills/blob/7407f3893ad4dceab546ac002c3ef806e4000c73/src/git.ts Supports: install KEEP COMPARING ## Other approaches to consider. Related by category or shared topics. These are alternatives to inspect, not a measured quality order. [### Anthropic Skill Creator ↗ Develops skills through example tasks, baseline comparisons, human review and separate trigger-description evaluation.](/skills/anthropics-skill-creator/)[### OpenAI Evaluate Skill ↗ Connects a local skill review to structural checks, budget explanations and an explicitly separate live benchmark workflow.](/skills/openai-evaluate-skill/)[### Cloudflare Durable Objects ↗ Designs per-entity state and coordination with explicit persistence, concurrency and runtime-test guidance.](/skills/cloudflare-durable-objects/) [AI Tools ↗](/tools/)[Skills ↗](/skills/)[Agents ↗](/agents/)[MCP Servers ↗](/mcp-servers/)