Sandboxes for
Coding Agents

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}