Replayable Sandboxes
Replay every browser action, file change, network request, tool call, and approval.
Start your first agent locallywith
npm i -g @hiver.sh/cli && hiverWhen agents fail, logs don’t tell the full story
Hiver replays the browser, terminal, files, network, tools, and approvals from one timeline.
Build reliable agents that do real work
Give agents a real working environment with governed files, policy-gated actions, and full replay across every run.
Bring any agent stack
Develop locally with Claude, Codex, Copilot, browser, or your agent loop. Deploy the same code to your cloud
import express from "express";
import { query } from "@anthropic-ai/claude-agent-sdk";
const app = express();
app.use(express.json());
app.post("/chat", async (req, res) => {
let reply = "";
for await (const msg of query({
prompt: req.body.prompt,
options: {
model: "claude-opus-4-8",
cwd: "/workspace",
allowedTools: [
"Bash",
"Read",
"Write",
"Edit",
"Glob",
"Grep",
"WebSearch",
],
permissionMode: "bypassPermissions",
},
})) {
if (msg.type === "result" && msg.subtype === "success") {
reply = msg.result;
}
}
res.json({ reply });
});
app.listen(3000, () => console.log("listening on :3000"));
import express from "express";
import { query } from "@anthropic-ai/claude-agent-sdk";
const app = express();
app.use(express.json());
app.post("/chat", async (req, res) => {
let reply = "";
for await (const msg of query({
prompt: req.body.prompt,
options: {
model: "claude-opus-4-8",
cwd: "/workspace",
allowedTools: [
"Bash",
"Read",
"Write",
"Edit",
"Glob",
"Grep",
"WebSearch",
],
permissionMode: "bypassPermissions",
},
})) {
if (msg.type === "result" && msg.subtype === "success") {
reply = msg.result;
}
}
res.json({ reply });
});
app.listen(3000, () => console.log("listening on :3000"));