--- title: Kubernetes SIG Apps introduces Agent Sandbox, a new CRD... description: Kubernetes SIG Apps has released Agent Sandbox (v0.21), a new project introducing a `Sandbox` Custom Resource Definition (CRD) designed specifically for AI... canonical: https://daily.dev/posts/kubernetes-sig-apps-introduces-agent-sandbox-a-new-crd-for-running-ai-agents-wrombko1c twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Kubernetes SIG Apps introduces Agent Sandbox, a new CRD for running AI agents | daily.dev og:description: Kubernetes SIG Apps has released Agent Sandbox (v0.21), a new project introducing a `Sandbox` Custom Resource Definition (CRD) designed specifically for AI... og:url: https://daily.dev/posts/kubernetes-sig-apps-introduces-agent-sandbox-a-new-crd-for-running-ai-agents-wrombko1c og:image: https://api.daily.dev/og/posts/wroMbko1c.png og:image:alt: Kubernetes SIG Apps introduces Agent Sandbox, a new CRD for running AI agents og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Kubernetes SIG Apps introduces Agent Sandbox, a new CRD for running AI agents **[Collections](https://daily.dev/sources/collections)** · 2 min read · 2 upvotes · 0 comments ## Summary Kubernetes SIG Apps has released Agent Sandbox (v0.21), a new project introducing a `Sandbox` Custom Resource Definition (CRD) designed specifically for AI agent workloads. Unlike existing primitives like StatefulSets, the Sandbox CRD treats each agent instance as a first-class object with its own lifecycle, stable network identity, and strong isolation via gVisor or Kata Containers. Key features include scale-to-zero with state preservation, declarative lifecycle management, and a `SandboxWarmPool` resource that pre-provisions pods to eliminate cold starts. A Python SDK and example templates are available, installable via kubectl. ## Content Kubernetes SIG Apps is building [Agent Sandbox](https://github.com/kubernetes-sigs/agent-sandbox), a new project that adds a `Sandbox` Custom Resource Definition specifically for running AI agent workloads. Version 0.21 is out now. ## Why not just use StatefulSets? The existing Kubernetes primitives — StatefulSets, headless Services, PersistentVolumeClaims — weren't designed with agentic workloads in mind. Agents are stateful, need a persistent identity, and often need to start near-instantly. Stitching together existing resources to meet those requirements is awkward at best. The `Sandbox` CRD treats a single agent instance as a first-class object: a stateful singleton with its own lifecycle, network identity, and isolation guarantees. ## What the Sandbox resource provides - **Strong isolation** via gVisor or Kata Containers, useful when agents execute untrusted or generated code - **Stable network identity** — each sandbox gets a dedicated hostname and address, which makes multi-agent coordination straightforward - **Scale-to-zero with state preservation** — sandboxes can be paused and resumed without losing state - **Declarative lifecycle management** through a clean API rather than a pile of coordinated resources ## Eliminating cold starts The Extensions API adds a `SandboxWarmPool` resource that keeps a pool of pre-provisioned pods ready to go. When a new sandbox is requested, it picks up a warm pod instead of waiting for one to spin up from scratch. ## Getting started The project is installable via `kubectl`. A Python SDK is available along with example templates. The [GitHub repo](https://github.com/kubernetes-sigs/agent-sandbox) has the full documentation. ## Similar posts on daily.dev - [Open-Source Agent Sandbox Enables Secure Deployment of AI Agents on Kubernetes](https://daily.dev/posts/open-source-agent-sandbox-enables-secure-deployment-of-ai-agents-on-kubernetes-ichq19lcg) · InfoQ · 1 upvotes · 0 comments - [Red Hat build of Agent Sandbox: Isolated workload management with Kubernetes](https://daily.dev/posts/red-hat-build-of-agent-sandbox-isolated-workload-management-with-kubernetes-bzojyklvx) · Red Hat Developer · 0 upvotes · 0 comments - [Google Cloud: A Deep Dive into GKE Sandbox for Agents](https://daily.dev/posts/google-cloud-a-deep-dive-into-gke-sandbox-for-agents-keoxzofzg) · The New Stack · 3 upvotes · 0 comments - [Why sandboxing your agent is not enough](https://daily.dev/posts/why-sandboxing-your-agent-is-not-enough-m5nc5kdyk) · CNCF · 13 upvotes · 0 comments --- Tags: [#kubernetes](https://daily.dev/tags/kubernetes), [#ai-agents](https://daily.dev/tags/ai-agents) [View this post on daily.dev](https://daily.dev/posts/kubernetes-sig-apps-introduces-agent-sandbox-a-new-crd-for-running-ai-agents-wrombko1c) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Kubernetes SIG Apps introduces Agent Sandbox, a new CRD for running AI agents","url":"https://daily.dev/posts/kubernetes-sig-apps-introduces-agent-sandbox-a-new-crd-for-running-ai-agents-wrombko1c","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/kubernetes-sig-apps-introduces-agent-sandbox-a-new-crd-for-running-ai-agents-wrombko1c"},"datePublished":"2026-03-25T16:12:35.486Z","dateModified":"2026-03-25T16:13:11.697Z","description":"Kubernetes SIG Apps has released Agent Sandbox (v0.21), a new project introducing a `Sandbox` Custom Resource Definition (CRD) designed specifically for AI...","isAccessibleForFree":true,"articleSection":"Collections","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Collections","logo":"https://media.daily.dev/image/upload/s--fk_6ycEi--/f_auto,q_auto/v1780996001/logos/collections?_a=BAMAMiWQ0","url":"https://daily.dev/sources/collections"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/kubernetes-sig-apps-introduces-agent-sandbox-a-new-crd-for-running-ai-agents-wrombko1c","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":2},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"kubernetes,ai-agents","timeRequired":"PT2M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Collections","item":"https://daily.dev/sources/collections"},{"@type":"ListItem","position":3,"name":"Kubernetes SIG Apps introduces Agent Sandbox, a new CRD for running AI agents"}]} ```