wrangler.jsonc

{
  "$schema": "node_modules/wrangler/config-schema.json",
  "name": "opencode-sandboxes",
  "main": "src/index.ts",
  "compatibility_date": "2025-05-06",
  "compatibility_flags": ["nodejs_compat"],
  "observability": {
    "enabled": true,
  },

  // Static frontend served on the bare domain; run_worker_first ensures
  // the Worker handles subdomain routing before assets are checked.
  "assets": {
    "directory": "./public/",
    "binding": "ASSETS",
    "run_worker_first": true,
  },

  // Environment variables used by the Sandbox SDK for R2 presigned URLs.
  // ANTHROPIC_API_KEY, R2_ACCESS_KEY_ID, and R2_SECRET_ACCESS_KEY are set
  // via `wrangler secret put`.
  "vars": {
    "DOMAIN": "<your-domain>",
    "BACKUP_BUCKET_NAME": "sandbox-snapshots",
    "CLOUDFLARE_ACCOUNT_ID": "<your-account-id>",
  },

  // R2 bucket for snapshot/restore. The first binding is used in the Worker
  // to look up backup metadata. The second (remote) binding lets wrangler dev
  // connect to the real bucket during local development.
  "r2_buckets": [
    {
      "binding": "BACKUP_BUCKET",
      "bucket_name": "sandbox-snapshots",
    },
    {
      "bucket_name": "sandbox-snapshots",
      "binding": "sandbox_snapshots",
      "remote": true,
    },
  ],

  // Each sandbox runs in its own container built from ./Dockerfile.
  // The Sandbox class is accessed via ctx.exports.Sandbox in the Worker.
  "containers": [
    {
      "class_name": "Sandbox",
      "image": "./Dockerfile",
      "instance_type": "standard-1",
      "max_instances": 20,
    },
  ],

  // Durable Object binding — makes the Sandbox class available on env.Sandbox.
  // Note: This config will become unnecessary in the near future
  "durable_objects": {
    "bindings": [
      {
        "class_name": "Sandbox",
        "name": "Sandbox",
      },
    ],
  },

  // Required Durable Object migration for the Sandbox class.
  // Allows each Sandbox to have a dedicated database associated with it
  // Note: This config will become unnecessary in the near future
  "migrations": [
    {
      "new_sqlite_classes": ["Sandbox"],
      "tag": "v1",
    },
  ],

  // Bare domain serves the frontend; wildcard catches all subdomains
  // for per-sandbox routing (e.g. my-sandbox.<your-domain>).
  "routes": [
    {
      "pattern": "<your-domain>/*",
      "zone_name": "<your-domain>",
    },
    {
      "pattern": "*.<your-domain>/*",
      "zone_name": "<your-domain>",
    },
  ],
}