infochanged

Agents, Workers - Cloudflare Computer now helps agents recover from interruptions and wait for approval

Announced: 2026-10-26
Tags: Agents, Workers
Severity: info, set by reef/rss-rule-v1
Source: https://developers.cloudflare.com/changelog/post/2026-10-26-computer-durable-javascript/

<a href="https://github.com/cloudflare/computer" target="_blank" rel="noopener"><code>@cloudflare/computer</code> ↗︎</a> gives your agent a workspace to run code in. From v0.7.0, that code can resume after a deploy or crash, and pause on an external action, for example to approve a tool call. <div tabindex="-1" class="heading-wrapper level-h4"><h4 id="resume-interrupted-runs">Resume interrupted runs</h4><a class="anchor-link" href="#resume-interrupted-runs"><svg width="16" height="16" viewBox="0 0 24 24"><path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z"></path></svg></a></div> Set <code>onInterrupt: "replay"</code> on <code>WorkerJavaScriptBackend</code>, or on a single run. <div><div data-nb-tabs data-nb-sync-key="workersExamples" class><div class="relative flex border-b border-border" role="tablist" data-nb-tabs-list></div><div class="mt-3"><div role="tabpanel" data-nb-tabs-content data-nb-tab-label="JavaScript" class><figure class="nb-code-figure" data-nb-lang="js"><pre class="astro-code astro-code-themes github-light github-dark nb-shiki-c6xiwz" tabindex="0" data-language="js" data-nb-lang="js"><code>import { DurableObject } from "cloudflare:workers"; import { Workspace } from "@cloudflare/computer"; import { WorkerJavaScriptBackend } from "@cloudflare/computer/backends/worker-javascript"; export class MyAgent extends DurableObject { workspace = new Workspace({ storage: this.ctx.storage, backends: [ new WorkerJavaScriptBackend({ loader: this.env.LOADER, onInterrupt: "replay", }), ], }); }</code></pre></figure></div><div role="tabpanel" data-nb-tabs-content data-nb-tab-label="TypeScript" class><figure class="nb-code-figure" data-nb-lang="ts"><pre class="astro-code astro-code-themes github-light github-dark nb-shiki-c6xiwz" tabindex="0" data-language="ts" data-nb-lang="ts"><code>import { DurableObject } from "cloudflare:workers"; import { Workspace } from "@cloudflare/computer"; import { WorkerJavaScriptBackend } from "@cloudflare/computer/backends/worker-javascript"; export class MyAgent extends DurableObject<Env> { workspace = new Workspace({ storage: this.ctx.storage, backends: [ new WorkerJavaScriptBackend({ loader: this.env.LOADER, onInterrupt: "replay", }), ], }); }</code></pre></figure></div></div></div><script type="module" src="https://developers.cloudflare.com/home/runner/work/cloudflare-docs/cloudflare-docs/src/components/ui/tabs/Tabs.astro?astro&type=script&index=0&lang.ts"></script></div> When recovery is triggered, the JavaScript runs again from the beginning, reusing recorded results for completed calls without printing previously recorded output again. If a call's result was not recorded before the interruption, recovery may repeat the call — even if its action already succeeded. For retry handling, including <code>unsafeToRepeat()</code> for operations that cannot safely repeat, refer to <a href="https://developers.cloudflare.com/agents/tools/filesystem/#calls-that-must-not-run-twice">Calls that must not run twice</a>. Recovery starts on the next call to <code>workspace.runtime</code>. To recover without waiting for traffic, call <code>workspace.runtime.recover()</code> from a <a href="https://developers.cloudflare.com/durable-objects/api/alarms/">Durable Object alarm</a>. <div tabindex="-1" class="heading-wrapper level-h4"><h4 id="wait-for-approvals">Wait for approvals</h4><a class="anchor-link" href="#wait-for-approvals"><svg width="16" height="16" viewBox="0 0 24 24"><path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z"></path></svg></a></div> <img src="https://developers.cloudflare.com/cdn-cgi/image/onerror=redirect,width=920,height=292,format=svg/_astro/computer-approval-flow.CNEabsLO.svg" alt="A run pauses at an approval gate, then resumes when approved or fails when rejected" loading="lazy" decoding="async" width="920" height="292"> Expose your application functions through <a href="https://developers.cloudflare.com/agents/tools/filesystem/#give-code-access-to-your-own-functions">custom modules</a>. A function can call <code>ctx.interrupt()</code> to pause the run until your application supplies an approval decision. <div tabindex="-1" class="heading-wrapper level-h4"><h4 id="require-approval-before-posting-a-comment">Require approval before posting a comment</h4><a class="anchor-link" href="#require-approval-before-posting-a-comment"><svg width="16" height="16" viewBox="0 0 24 24"><path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z"></path></svg></a></div> For example, to provide a GitHub module that allows an agent to post a comment on an issue with approval, an implementation of <code>postComment</code> could look like this: <div><div data-nb-tabs data-nb-sync-key="workersExamples" class><div class="relative flex border-b border-border" role="tablist" data-nb-tabs-list></div><div class="mt-3"><div role="tabpanel" data-nb-tabs-content data-nb-tab-label="JavaScript" class><figure class="nb-code-figure" data-nb-lang="js"><pre class="astro-code astro-code-themes github-light github-dark nb-shiki-c6xiwz" tabindex="0" data-language="js" data-nb-lang="js"><code>new WorkerJavaScriptBackend({ loader: this.env.LOADER, onInterrupt: "replay", modules: { // The agent's code imports this with import { postComment } from "ws:github". "ws:github": { postComment: async ([issue, body], ctx) => { const { approved } = await ctx.interrupt({ issue, body, }); if (!approved) throw new Error("The comment was rejected."); return github.comment(issue, body, { idempotencyKey: ctx.callId }); }, }, }, });</code></pre></figure></div><div role="tabpanel" data-nb-tabs-content data-nb-tab-label="TypeScript" class><figure class="nb-code-figure" data-nb-lang="ts"><pre class="astro-code astro-code-themes github-light github-dark nb-shiki-c6xiwz" tabindex="0" data-language="ts" data-nb-lang="ts"><code>new WorkerJavaScriptBackend({ loader: this.env.LOADER, onInterrupt: "replay", modules: { // The agent's code imports this with import { postComment } from "ws:github". "ws:github": { postComment: async ([issue, body], ctx) => { const { approved } = await ctx.interrupt<{ approved: boolean }>({ issue, body, }); if (!approved) throw new Error("The comment was rejected."); return github.comment(issue, body, { idempotencyKey: ctx.callId }); }, }, }, });</code></pre></figure></div></div></div></div> <div tabindex="-1" class="heading-wrapper level-h4"><h4 id="call-it-from-agent-code">Call it from agent code</h4><a class="anchor-link" href="#call-it-from-agent-code"><svg width="16" height="16" viewBox="0 0 24 24"><path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z"></path></svg></a></div> When the agent's code calls <code>postComment()</code>, the run pauses at <code>ctx.interrupt()</code> until your app responds. The agent's code calls it like any other function: <figure class="nb-code-figure" data-nb-lang="js"><pre class="astro-code astro-code-themes github-light github-dark nb-shiki-c6xiwz" tabindex="0" data-language="js" data-nb-lang="js"><code>import { postComment } from "ws:github"; export default async function ({ issue }) { return postComment(issue, "Hello world"); }</code></pre></figure> <div tabindex="-1" class="heading-wrapper level-h4"><h4 id="respond-to-the-approval-request">Respond to the approval request</h4><a class="anchor-link" href="#respond-to-the-approval-request"><svg width="16" height="16" viewBox="0 0 24 24"><path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z"></path></svg></a></div> The time spent waiting does not count toward its timeout. The wait also survives deploys. Fetch the pending calls with <code>workspace.runtime.pending()</code> and resolve them with <code>respond()</code>: <div><div data-nb-tabs data-nb-sync-key="workersExamples" class><div class="relative flex border-b border-border" role="tablist" data-nb-tabs-list></div><div class="mt-3"><div role="tabpanel" data-nb-tabs-content data-nb-tab-label="JavaScript" class><figure class="nb-code-figure" data-nb-lang="js"><pre class="astro-code astro-code-themes github-light github-dark nb-shiki-c6xiwz" tabindex="0" data-language="js" data-nb-lang="js"><code>for (const call of await workspace.runtime.pending()) { await workspace.runtime.respond(call.id, call.callId, { approved: true }); }</code></pre></figure></div><div role="tabpanel" data-nb-tabs-content data-nb-tab-label="TypeScript" class><figure class="nb-code-figure" data-nb-lang="ts"><pre class="astro-code astro-code-themes github-light github-dark nb-shiki-c6xiwz" tabindex="0" data-language="ts" data-nb-lang="ts"><code>for (const call of await workspace.runtime.pending()) { await workspace.runtime.respond(call.id, call.callId, { approved: true }); }</code></pre></figure></div></div></div></div> The run continues once all pending calls are resolved. For setup, current limitations, and how replay works, refer to <a href="https://developers.cloudflare.com/agents/tools/filesystem/#resume-runs-after-a-restart">Resume runs after a restart</a>.

The text above is the source's. reef added the severity, the dates it could read from the text, and the endpoints and scopes named in code.