CLOUD DEVELOPMENT / Cloudflare
Cloudflare Durable Objects
Designs per-entity state and coordination with explicit persistence, concurrency and runtime-test guidance.
“Build, debug, or review Cloudflare Durable Objects code for persistent state and coordination.”
01 / THE REASONING
Why this made the selection.
- Defines where Durable Objects fit and where stateless Workers or independent requests fit better.
- The testing reference distinguishes repeat calls from actual persistence recovery and asks for independent object identities.
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/durable-objects/SKILL.md
- skills/durable-objects/references/rules.md
- skills/durable-objects/references/testing.md
- LICENSE
Our findings
- The rules require persisting important state before relying on memory and warn against holding initialization locks over external I/O.
- The guide explains that setting a new alarm replaces the previous scheduled alarm for that object.
- The testing reference requires checking installed integration/isolation behavior before changing an existing suite.
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.
DOCUMENTED COMMAND
npx skills add https://github.com/cloudflare/skills/tree/b052c32bab7dd493513260228a36c88294f343f1/skills/durable-objectsCopying 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
- Bindings, migrations and a matching configured runtime
- A Cloudflare account for deployed resource testing
04 / FOLLOW THE EVIDENCE
The source trail.
Our notes are separate from the original resource.
Check upstream before adopting a new version.
https://github.com/cloudflare/skills/blob/b052c32bab7dd493513260228a36c88294f343f1/skills/durable-objects/SKILL.md
Supports: summary, upstreamDescription, whySelected, bestFor, limitations, review, compatibility, access
https://github.com/cloudflare/skills/blob/b052c32bab7dd493513260228a36c88294f343f1/skills/durable-objects/references/rules.md
Supports: review, limitations, access
https://github.com/cloudflare/skills/blob/b052c32bab7dd493513260228a36c88294f343f1/skills/durable-objects/references/testing.md
Supports: review, limitations, access
https://github.com/cloudflare/skills/blob/b052c32bab7dd493513260228a36c88294f343f1/LICENSE
Supports: license
https://github.com/cloudflare/skills/blob/b052c32bab7dd493513260228a36c88294f343f1/README.md
Supports: install, compatibility, access
https://github.com/vercel-labs/skills/blob/7407f3893ad4dceab546ac002c3ef806e4000c73/README.md
Supports: install
https://github.com/vercel-labs/skills/blob/7407f3893ad4dceab546ac002c3ef806e4000c73/src/git.ts
Supports: install