Sandbox AI-app lifecycle, from build to run
Hi HN, This is a project I've been working on since the beginning of 2025 full time, without funding. Coding agents have fundamentally changed the way we write software. When you let an agent write code, pull dependencies, and run scripts, you are delegating trust while still keeping the responsibility. You shouldn't have to choose between moving fast with agents and maintaining basic control over your host machine. Normally, we just inspect the final result, treating the app like a black box. Most security tools only sandbox the app runtime and ignore the build phase. CapaKit is my attempt…
Sandbox AI-app lifecycle, from build to run launched on June 9, 2026 with 6 votes, #2,066 of 22,647 launches that month and more than 75% of that year's launches.
What it does
CapaKit is a free runtime and CLI toolkit for building AI app Kits.
CapaKit Public Alpha · macOS · Bun workloads · Free to use Sandboxed from build to run . CapaKit is a free runtime and CLI toolkit for building AI app Kits. When your agent builds, tests, or runs a Kit, it happens in isolation, not on your host. AI apps quietly become your responsibility. Most tooling only sandboxes the runtime, completely ignoring the risky, messy parts before it. A Kit is plain source code plus a manifest. It speaks MCP, A2A, and OpenAI-compatible protocols, and anyone can run it with one command, fully sandboxed. I want a web UI where I pick an invoice from my invoices folder and see extracted fields. First ask me to confirm the details are correct, then use the HubSpot…from capakit.com
In the maker’s words, at launch
Hi HN, This is a project I've been working on since the beginning of 2025 full time, without funding. Coding agents have fundamentally changed the way we write software. When you let an agent write code, pull dependencies, and run scripts, you are delegating trust while still keeping the responsibility. You shouldn't…
Pricing, as stated on its site
Free — CapaKit is a free runtime and CLI toolkit for building AI app Kits. The product is explicitly stated as "Free to use" and "free runtime" with no pricing page or paid tier mentioned.
checked October 2026 · prices change
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AgenMar 2026 · agenhq.com · ▲138AI changed the way we code, but we're still using the old processes, and we've become the bottleneck, the AI is waiting for us - to reply, to open our laptops, to review the code, and so on. We're building the future of AI software development. The agents are autonomous, they run in sandboxes, automatically fix the pipelines, and deliver you the final, working code. You can use live preview to see the changes they made. Working across multiple repositories, all within the same session. This is the future - you don't need an IDE, and you don't have to run anything locally.
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AnyFrameMay 2026 · anyframe.dev · ▲96Spawn sandboxes at the speed of natural language. Pause, resume, and snapshot the full state of an agent’s workspace — filesystem, processes, memory — and pick up later without losing context.
Era – Open-source local sandbox for AI agentsNov 2025 · github.com · ▲62Just watched this video by ThePrimeagen (https://www.youtube.com/watch?v=efwDZw7l2Nk) about attackers jailbreaking Claude to run cyber attacks. The core issue: AI agents need isolation. We built ERA to fix this – local microVM-based sandboxing for AI-generated code with hardware-level security. Think containers, but safer. Such attacks wouldn't touch your host if running in ERA. GitHub: https://github.com/BinSquare/ERA Quick start: https://github.com/BinSquare/ERA/tree/main/era-agent/tutoria... Would love your…
YepCode2022 · yepcode.io · ▲157Hey HN, We’re excited to introduce YepCode Run, a serverless runtime and SDK for executing code in secure sandboxes. Built on top of YepCode (https://yepcode.io), it allows you to execute code without any setup or installation. Perfect for: * Running AI-generated code – Securely in a sandbox environment, enabling fully autonomous AI agents. * Package Exploration – Try npm or PyPI packages without installing them locally. * Code Sharing – Easily share runnable code examples with others. * Quick Prototyping – Test snippets and algorithms on the fly. Just write or paste your code, and…
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