---
description: The experimental OpenCodeHarness runs OpenCode 2.0 in a plain Durable Object, with Workers AI models and durable sessions.
title: Run OpenCode 2.0 on Cloudflare with the Agents SDK
image: https://developers.cloudflare.com/changelog/post/2026-10-12-opencode-harness/og.png?v=6d08f58a4bc22f62
---

[Skip to content](#main-content)

[View RSS feeds](https://developers.cloudflare.com/fundamentals/new-features/available-rss-feeds/) [ Subscribe to RSS](https://developers.cloudflare.com/changelog/rss/index.xml)

[Back to all posts](https://developers.cloudflare.com/changelog)

October 12, 2026

## Run OpenCode 2.0 on Cloudflare with the Agents SDK

[Agents](https://developers.cloudflare.com/agents/) [Workers](https://developers.cloudflare.com/workers/)

Copy as Markdown| [View as Markdown](https://developers.cloudflare.com/changelog/post/2026-10-12-opencode-harness/index.md)| [Agent setup](https://developers.cloudflare.com/agent-setup/)

The [Agents SDK](https://developers.cloudflare.com/agents/) now supports [OpenCode 2.0 ↗︎](https://opencode.ai/v2/docs/build/sdk/) through the experimental `OpenCodeHarness`. Run OpenCode inside a plain Durable Object, with sessions stored in SQLite and Lifecycle jobs that wake interrupted work after eviction.

The `agents/models/opencode` provider connects OpenCode to Workers AI through the `AI` binding. OpenCode plugins extend the harness with custom tools, remote MCP servers, and skills. Refer to [OpenCode's Cloudflare SDK documentation ↗︎](https://opencode.ai/v2/docs/build/sdk/cloudflare/) for the embedded host API.

![](https://developers.cloudflare.com/icons/agents/claude/light.svg)![](https://developers.cloudflare.com/icons/agents/claude/dark.svg)![](https://developers.cloudflare.com/icons/agents/codex/light.svg)![](https://developers.cloudflare.com/icons/agents/codex/dark.svg)![](https://developers.cloudflare.com/icons/agents/cursor/light.svg)![](https://developers.cloudflare.com/icons/agents/cursor/dark.svg)![](https://developers.cloudflare.com/icons/agents/opencode/light.svg)![](https://developers.cloudflare.com/icons/agents/opencode/dark.svg)Copy promptPrompt copied!

[![Deploy to Cloudflare](https://deploy.workers.cloudflare.com/button)](https://deploy.workers.cloudflare.com/?url=https://github.com/cloudflare/agents/tree/main/examples/next/harnesses/opencode)

Install Agents SDK 0.28.0 or later with the OpenCode packages:

npmyarnpnpmbun

```
npm i agents@latest @opencode/sdk@2 @opencode/plugin@2
```

```
yarn add agents@latest @opencode/sdk@2 @opencode/plugin@2
```

```
pnpm add agents@latest @opencode/sdk@2 @opencode/plugin@2
```

```
bun add agents@latest @opencode/sdk@2 @opencode/plugin@2
```

Create a harness and install a Lifecycle on your Durable Object:

```js
import { DurableObject } from "cloudflare:workers";
import { Lifecycle } from "agents/lifecycle";
import { OpenCodeWorkerd } from "@opencode/sdk/workerd";
import { OpenCodeHarness } from "agents/harness/opencode";
import { createAI } from "agents/models/opencode";
import workerTools from "./worker-tools";

export class Assistant extends DurableObject {
	ai = createAI({ binding: this.env.AI });
	harness = new OpenCodeHarness({
		opencode: ({ storage }) =>
			OpenCodeWorkerd.create({
				storage,
				models: { fetch: false },
				plugins: [this.ai.plugin, workerTools],
			}),
		defaults: {
			model: this.ai("@cf/moonshotai/kimi-k2.7-code", {
				reasoningEffort: "low",
			}),
			agent: "build",
		},
	});

	lifecycle = Lifecycle.install(this).use(this.harness);

	async ask(prompt) {
		const { status, text, reason } = await this.harness.prompt(prompt);
		return { status, text, reason };
	}
}
```

```ts
import { DurableObject } from "cloudflare:workers";
import { Lifecycle } from "agents/lifecycle";
import { OpenCodeWorkerd } from "@opencode/sdk/workerd";
import { OpenCodeHarness } from "agents/harness/opencode";
import { createAI } from "agents/models/opencode";
import workerTools from "./worker-tools";

export class Assistant extends DurableObject<Env> {
	ai = createAI({ binding: this.env.AI });
	harness = new OpenCodeHarness({
		opencode: ({ storage }) =>
			OpenCodeWorkerd.create({
				storage,
				models: { fetch: false },
				plugins: [this.ai.plugin, workerTools],
			}),
		defaults: {
			model: this.ai("@cf/moonshotai/kimi-k2.7-code", {
				reasoningEffort: "low",
			}),
			agent: "build",
		},
	});

	lifecycle = Lifecycle.install(this).use(this.harness);

	async ask(prompt: string) {
		const { status, text, reason } = await this.harness.prompt(prompt);
		return { status, text, reason };
	}
}
```

The [OpenCode harness guide](https://developers.cloudflare.com/agents/harnesses/opencode/) includes the `workerTools` plugin, Wrangler configuration, and session APIs. The [working example ↗︎](https://github.com/cloudflare/agents/tree/main/examples/next/harnesses/opencode) adds a browser UI, WebSocket streaming, and Workspace tools from `@cloudflare/computer` for files and code execution.

```json
{"@context":"https://schema.org","@type":"BlogPosting","@id":"https://developers.cloudflare.com/changelog/post/2026-10-12-opencode-harness/#page","headline":"Run OpenCode 2.0 on Cloudflare with the Agents SDK","description":"The experimental OpenCodeHarness runs OpenCode 2.0 in a plain Durable Object, with Workers AI models and durable sessions.","url":"https://developers.cloudflare.com/changelog/post/2026-10-12-opencode-harness/","inLanguage":"en","image":"https://developers.cloudflare.com/changelog/post/2026-10-12-opencode-harness/og.png?v=6d08f58a4bc22f62","dateModified":"2026-10-12","datePublished":"2026-10-12","publisher":{"@type":"Organization","name":"Cloudflare","description":"One platform for your apps, agents, and workforce. Build, secure, and scale without managing infrastructure","url":"https://www.cloudflare.com/","sameAs":["https://github.com/cloudflare","https://www.linkedin.com/company/cloudflare","https://x.com/cloudflare"],"logo":{"@type":"ImageObject","url":"https://developers.cloudflare.com/logo.svg"},"address":{"@type":"PostalAddress","streetAddress":"101 Townsend St","addressLocality":"San Francisco","addressRegion":"CA","postalCode":"94107","addressCountry":"US"},"contactPoint":[{"@type":"ContactPoint","contactType":"Customer Support","url":"https://support.cloudflare.com/","availableLanguage":["English"]},{"@type":"ContactPoint","contactType":"Sales","url":"https://www.cloudflare.com/contact/","availableLanguage":["English"]}]},"isPartOf":{"@type":"WebSite","@id":"https://developers.cloudflare.com/#website","name":"Cloudflare Docs","url":"https://developers.cloudflare.com/"}}
```