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agents-sdk

Build stateful Agents on Cloudflare Workers with current, source-verified SDK APIs. Covers durable state, RPC, chat, schedules, queues, fibers, Workflows, MCP, and channels while keeping authorization and external effects application-owned. NOT for assuming SDK helpers grant application authorization or effect approval.

The English summary is being prepared. Showing the original description.

curiositech/port-daddy
Works withCloudflare
See how to install

Files included (21)

  • SKILL.md4.6 KB
  • references/browse-the-web.md5.7 KB
  • references/callable.md3.3 KB
  • references/client-sdk.md8.9 KB
  • references/codemode.md3.3 KB
  • references/configuration.md4.4 KB
  • references/durable-execution.md4.4 KB
  • references/email.md10.4 KB
  • references/evidence-scope.md1.3 KB
  • references/human-in-the-loop.md3.1 KB
  • references/mcp.md12.9 KB
  • references/observability.md2.2 KB
  • references/queue-retries.md3.8 KB
  • references/routing.md7.6 KB
  • references/server-driven-messages.md10.7 KB
  • references/state-scheduling.md13.8 KB
  • references/streaming-chat.md15.8 KB
  • references/think.md5.8 KB
  • references/voice.md1.7 KB
  • references/webhooks-push.md4.7 KB
  • references/workflows.md5.1 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

Cloudflare Agents SDK

Prefer the installed package and current Cloudflare Agents documentation over remembered signatures. This bundle was reconciled on 2026-09-24; examples are illustrative and were not package-typechecked or deployed.

Runtime and effect boundary

Cloudflare Agents provides Durable Object-backed identity, local SQLite state, connections, scheduling, and durable execution primitives. The application must configure principal authentication and resource authorization, make provider retries safe, and verify external outcomes separately from transcript/event persistence. Durable Object instance identity does not establish user authority.

flowchart LR
  I[Authorized input] --> A[Agent runtime]
  A --> S[(Durable state or work record)]
  A --> P[Scoped application operation]
  P --> X[External provider]
  X --> R[Readback or effect receipt]
  R --> S

Pick a primitive

NeedStart hereRequired application boundary
Stateful real-time instancestate, routing, client SDKauthenticate and authorize instance access
Browser commandcallable methodsvalidate input, idempotency, outcome status
Scheduled/queued callbackstate scheduling, queuesduplicate, retry, and late-delivery behavior
Recovery from DO evictiondurable executioncomplete checkpoint and recovery/compensation policy
Long-running multi-step work or approvalWorkflowsbind request/action/approval and repeated progress
Chat/server turnstreaming chat, server-driven messagestranscript persistence differs from effect completion
External webhook/pushwebhooks/pushverify source, dedupe, current consent, effect receipt
sequenceDiagram
  participant C as caller
  participant A as Agent
  participant D as durable record
  participant X as external system
  C->>A: authorized request and operation key
  A->>D: record accepted intent
  A->>X: attempted operation
  Note over A,X: timeout, disconnect, or eviction can leave outcome unknown
  A->>X: query by original operation identity when supported
  X-->>A: definitive outcome or unknown
  A->>D: inspect receipt or retain unknown
  alt independently confirmed
    A->>D: record completed effect
  else not confirmed
    A->>D: pending reconciliation under original identity
  end

Navigation

Core runtime

Durable/background execution

  • Queues and retries: FIFO queue, retry classification, unknown result handling.
  • Fibers: checkpoints, recovery, startFiber, cooperative cancellation.
  • Workflows: durable steps, external waits, approval and progress.
  • Observability: diagnostics, Tail Workers, correlation.

Channels and harnesses

Source and validation limit

The diagrams show a design boundary, not a runtime trace. Each reference names the official sources and the date it was checked; evidence scope describes the validation boundary. No installation, typecheck, Worker, Durable Object, Cloudflare service, provider, approval, notification, or browser action was run.

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