durable-objects SKILL.md skillA

durable-objects from daishiman/harness-dev is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add daishiman/harness-dev/durable-objects@git:20261002.c0e127d

Pins git:20261002.c0e127d in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
daishiman/harness-dev
Path
.agents/skills/durable-objects/SKILL.md
Versions recorded
1
Latest version
git:20261002.c0e127d, committed Oct 2, 2026
Size
7,607 bytes
Repository stars
10
License
none declared

Cloudflare Durable Objects の実装とレビューに使用する。チャットルーム、マルチプレイ、予約システムなどの状態を持つ協調処理、RPC methods、SQLite storage、alarms、WebSockets、Workers統合、wrangler設定、Vitestでのテストを扱う。事前学習の知識より最新のCloudflare docsの取得を優先する。.

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

> 本ファイルは cloudflare/skills(Apache-2.0)を基に改変しています。詳細は リポジトリルートの ATTRIBUTION.md を参照。

# Durable Objects の実装・レビュー

Durable Objectsを使い、Cloudflare edge上に状態を持つ協調型アプリケーションを実装する。

## 最新情報の取得先

Durable Objects APIsや設定は更新されるため、**事前学習の知識より最新の公式情報を優先する**。API signature、設定項目、制限値を記憶だけで断定しない。

正本は [`cloudflare` Skill の「最新情報の取得先」](../cloudflare/SKILL.md#最新情報の取得先)(docs MCP 第一手段、不通時の復旧、workers-types / config-schema の取得方法)。ここには本Skill固有の取得先だけを書く。

| 取得先 | 取得方法 | 使う場面 |
|--------|----------|---------|
| **Cloudflare docs (MCP)** | `cloudflare-docs` MCPで `durable-objects` + API名(`sql.exec`、`setAlarm` 等)を検索 | **既定の第一手段**。API reference、制限値、compatibility date要件 |
| Durable Objects docs (Web) | `https://developers.cloudflare.com/durable-objects/`(`api/`、`best-practices/`、`examples/`) | MCP不通時 |

実装前に該当ページとプロジェクトのWrangler config schema / Workers typesを確認する。本Skillと最新の公式情報が食い違う場合は公式情報を優先し、不明なAPIや設定を推測で補わない。

## 使う場面

- 協調処理のために新しいDurable Object classを作る
- RPC methods、alarms、WebSocket handlersを実装する
- 既存のDOコードをBest Practicesに照らしてレビューする
- `wrangler.jsonc` / `wrangler.toml`にDO bindingsとmigrationsを設定する
- `@cloudflare/vitest-pool-workers`でテストする
- sharding戦略やparent-child関係を設計する

## 詳細リファレンス
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add daishiman/harness-dev/durable-objects@sha256:51e0f24994ab1bf6

The line at the top of this page pins the label git:20261002.c0e127d, 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.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_5f64hsijdyt652g2.svg)](https://markdownregistry.com/a/art_5f64hsijdyt652g2)

2 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on Oct 2, 2026.

versioncommittedcommitsizeaudit
git:20261002.c0e127d latest2026-10-02 c0e127d 7,607 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (7607 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

GitHub

daishiman/harness-dev · 10 stars · license none declared · pushed 2026-10-19 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_5f64hsijdyt652g2
GET https://markdownregistry.com/api/v1/resolve?ref=daishiman/harness-dev/durable-objects
GET https://markdownregistry.com/api/v1/blob/51e0f24994ab1bf6e99d010bce3cc5b70d77e1d59c98b1c473083a630fc06e5a

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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