durable-objects SKILL.md skillA
durable-objects from d-padmanabhan/agent-engineering-handbook is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add d-padmanabhan/agent-engineering-handbook/durable-objects@git:20260601.8111c35Pins git:20260601.8111c35 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- d-padmanabhan/agent-engineering-handbook
- Path
skills/durable-objects/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260601.8111c35, committed Jun 1, 2026
- Size
- 5,875 bytes
- Repository stars
- 20
- License
- MIT
Create and review Cloudflare Durable Objects. Use when building stateful coordination (chat rooms, multiplayer games, booking systems), implementing RPC methods, SQLite storage, alarms, WebSockets, or reviewing DO code for best practices. Covers Workers integration, wrangler config, and testing with Vitest. Biases towards retrieval from Cloudflare docs over pre-trained knowledge.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Durable Objects Build stateful, coordinated applications on Cloudflare's edge using Durable Objects. ## Retrieval Sources Your knowledge of Durable Objects APIs and configuration may be outdated. **Prefer retrieval over pre-training** for any Durable Objects task. | Resource | URL | |----------|-----| | Docs | <https://developers.cloudflare.com/durable-objects/> | | API Reference | <https://developers.cloudflare.com/durable-objects/api/> | | Best Practices | <https://developers.cloudflare.com/durable-objects/best-practices/> | | Examples | <https://developers.cloudflare.com/durable-objects/examples/> | Fetch the relevant doc page when implementing features. ## When to Use - Creating new Durable Object classes for stateful coordination - Implementing RPC methods, alarms, or WebSocket handlers - Reviewing existing DO code for best practices - Configuring wrangler.jsonc/toml for DO bindings and migrations - Writing tests with `@cloudflare/vitest-pool-workers` - Designing sharding strategies and parent-child relationships ## Reference Documentation - `./references/rules.md` - Core rules, storage, concurrency, RPC, alarms …
Read the whole file at its exact version.
How to install
mdr add d-padmanabhan/agent-engineering-handbook/durable-objects@sha256:6ed8039250146bd0The line at the top of this page pins the label git:20260601.8111c35, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_hqhjxaeoxp2wwa5f)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jun 1, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (5875 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
d-padmanabhan/agent-engineering-handbook · 20 stars · license MIT · pushed 2026-10-30 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_hqhjxaeoxp2wwa5f GET https://markdownregistry.com/api/v1/resolve?ref=d-padmanabhan/agent-engineering-handbook/durable-objects GET https://markdownregistry.com/api/v1/blob/6ed8039250146bd0b987d01ccbdc41975bc319717c642d813b1f6a31fd5cc7f3
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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