durable-objects SKILL.md skillA
durable-objects from swyxio/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add swyxio/skills/durable-objects@git:20260820.cd23820Pins git:20260820.cd23820 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- swyxio/skills
- Path
durable-objects/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260820.cd23820, committed Aug 20, 2026
- First version recorded
- Aug 5, 2026
- Size
- 2,003 bytes
- Repository stars
- 176
- License
- MIT
Design, implement, debug, or test Cloudflare Durable Objects when the task specifically involves per-key coordination, strongly consistent object-owned state, RPC or HTTP interfaces, alarms, WebSocket hibernation, bindings, or class lifecycle. Do not trigger for ordinary stateless Workers or Cloudflare Agents SDK work already owned by the `agents-sdk` skill.
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 Use Durable Objects when one named object should serialize access to its own state. Retrieve current Cloudflare documentation for APIs, bindings, storage, class lifecycle, limits, and pricing. Load only the relevant reference: - [rules.md](references/rules.md) for partitioning, storage, concurrency, RPC, alarms, and WebSockets. - [testing.md](references/testing.md) for Workers Vitest and alarm tests. - [workers.md](references/workers.md) for bindings, lifecycle configuration, generated types, and observability. ## Design contract 1. Name the coordination key and deterministic object ID. Avoid a global object unless deliberate low-volume global serialization is the requirement. 2. Identify object-owned persistent state. Treat caches and external stores as separate consistency boundaries. 3. Prefer typed RPC for new internal interfaces; retain `fetch()` when HTTP semantics or a live compatibility contract requires it. 4. Keep state transitions deterministic. External I/O can interleave, so fence, serialize, or reconcile the affected transition. 5. Use `blockConcurrencyWhile()` for bounded initialization, not routine requests …
Read the whole file at its exact version.
How to install
mdr add swyxio/skills/durable-objects@sha256:26931719768faa70The line at the top of this page pins the label git:20260820.cd23820, 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_3adpy4c5bbkpg5jr)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Aug 5, 2026 and Aug 20, 2026, about one every 7 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260820.cd23820 latest | 2026-08-20 | cd23820 | 2,003 B | A | view · diff |
| git:20260809.e8d3666 | 2026-08-09 | e8d3666 | 2,447 B | A | view · diff |
| git:20260805.87b9536 | 2026-08-05 | 87b9536 | 5,867 B | A | view |
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 (2003 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
swyxio/skills · 176 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_3adpy4c5bbkpg5jr GET https://markdownregistry.com/api/v1/resolve?ref=swyxio/skills/durable-objects GET https://markdownregistry.com/api/v1/blob/26931719768faa70ac12be9c42a95b160e4cfe1f2c6de7e21bbb06aa957178e3
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.