Launch HN: Freestyle – Sandboxes for Coding Agents

1// Like Lovable, Bolt, V0
2import { freestyle, VmSpec } from "freestyle-sandboxes";
3import { VmBun } from "@freestyle-sh/with-bun";
4import { VmDevServer } from "@freestyle-sh/with-dev-server";
5
6// Create repo from template
7const { repoId } = await freestyle.git.repos.create({ ... });
8
9const { vm } = await freestyle.vms.create({
10 with: {
11 devServer: new VmDevServer({
12 devCommand: "bun run dev",
13 runtime: new VmBun(),
14 repo: repoId
15 }),
16 },
17});

1// Like Devin, Cursor Agent
2import { freestyle, VmSpec } from "freestyle-sandboxes";
3import { VmBun } from "@freestyle-sh/with-bun";
4
5const { vm } = await freestyle.vms.create({
6 git: {
7 repos: [
8 { repo: "https://github.com/user/repo.git" },
9 ]
10 }
11});
12
13const { forks } = await vm.fork({ count: 3 });
14
15await Promise.all([
16 ai(forks[0], "Build the API endpoints"),
17 ai(forks[1], "Build the frontend UI"),
18 ai(forks[2], "Write the test suite"),
19]);

1// Like Code Rabbit, Greptile
2import { freestyle } from "freestyle-sandboxes";
3import { VmBun } from "@freestyle-sh/with-bun";
4
5const { vm } = await freestyle.vms.create({
6 git: {
7 repos: [{ repo: repoUrl, rev: branchRev }],
8 },
9});
10
11const { stdout: lint } = await vm.exec("bun run lint");
12const { stdout: test } = await vm.exec("bun test");
13const review = await ai(vm, "Review the diff for bugs");
14
15await github.pulls.createReview({
16 body: review,
17 event: test.includes("FAIL") ? "REQUEST_CHANGES" : "APPROVE",
18});

1// Like OpenClaw, Claude, Cowork
2import { freestyle } from "freestyle-sandboxes";
3
4const { vm } = await freestyle.vms.create({
5 persistence: { type: "persistent" },
6 // Pauses after 60s idle — $0 cost, resumes on next exec
7 idleTimeoutSeconds: 60,
8});
9
10while (true) {
11 const userMessage = await getNextMessage();
12 const result = await ai(vm, userMessage);
13 await respond(result);
14}

Sandboxes made for running tens of thousands of agents

VMs provision in under 700ms from API request to ready machine.

Clone a running VM without pausing it — get full copies in milliseconds.

Hibernate VMs and resume exactly where you left off — pay nothing while paused.

Git repos for your agents.

Configure webhooks per repo, filter by branch, path, or event type.

Bidirectional sync between Freestyle and GitHub repositories.

Push to deploy with Freestyle Deployments or clone into a VM.

Not containers. Full Linux VMs with real root access.

Run VMs inside VMs, Docker, or any virtualization stack your agents need. Full KVM support.

Sealed Linux users, systemd services and groups; multi-user isolation inside every VM.

The full Linux networking stack with real root access.