{
  "schema_version": 1,
  "task": "cold_create_to_first_command",
  "method": {
    "first_command": "echo ok",
    "verify_command": "uname -a",
    "replicates_requested": 5,
    "readiness": {
      "attempts": 40,
      "gap_ms": 250,
      "probe_timeout_ms": 2000
    },
    "definitions": {
      "spawn_ms": "t0 (monotonic, before create) until the provider's create call returns a handle",
      "cold_start_ms": "headline TTFR: t0 until the first `echo ok` exits 0",
      "time_to_first_exec_ms": "create returned until the first `echo ok` exits 0",
      "teardown_ms": "wall time of the provider's destroy call"
    },
    "attribution": "Metric definitions from StarSling High Performance Sandbox Benchmarks, MIT, Copyright (c) 2026 StarSling. Independent implementation, not official StarSling."
  },
  "host": {
    "platform": "darwin 27.0.0",
    "runtime": "bun 1.2.19",
    "timezone": "America/Denver",
    "note": "Numbers include network round trips from this host. Not comparable to StarSling's pipeline tables (different image and machine shape)."
  },
  "started_at_utc": "2026-11-12T08:53:01.864Z",
  "finished_at_utc": "2026-11-12T08:53:10.857Z",
  "providers": [
    {
      "id": "freestyle",
      "env_vars": [
        "FREESTYLE_API_KEY"
      ],
      "requires_payment_method": false,
      "note": "Created with an empty firewall (no network), matching Cloudflare's enableInternet: false.",
      "status": "measured",
      "reason": null,
      "replicates": [
        {
          "index": 1,
          "ok": true,
          "sandbox_id": "vm-1cd8647570f6402fa12875059a9362c1",
          "image": "freestyle default VM image",
          "spawn_ms": 1272,
          "cold_start_ms": 1572.1,
          "time_to_first_exec_ms": 300.2,
          "verify_ms": 320.4,
          "teardown_ms": 362.9,
          "first_command_stdout": "ok",
          "uname": "Linux freestyle-vm 6.1.102 #1 SMP PREEMPT_DYNAMIC Sun Nov  8 09:00:04 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        },
        {
          "index": 2,
          "ok": true,
          "sandbox_id": "vm-dbb24a90036f4201a28ba4f8563ceec8",
          "image": "freestyle default VM image",
          "spawn_ms": 659.6,
          "cold_start_ms": 975.6,
          "time_to_first_exec_ms": 316.1,
          "verify_ms": 306,
          "teardown_ms": 379.3,
          "first_command_stdout": "ok",
          "uname": "Linux freestyle-vm 6.1.102 #1 SMP PREEMPT_DYNAMIC Sun Nov  8 09:00:04 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        },
        {
          "index": 3,
          "ok": true,
          "sandbox_id": "vm-78c7db3c372f40f5b1541f74840504de",
          "image": "freestyle default VM image",
          "spawn_ms": 726.6,
          "cold_start_ms": 1023.4,
          "time_to_first_exec_ms": 296.8,
          "verify_ms": 303.4,
          "teardown_ms": 372,
          "first_command_stdout": "ok",
          "uname": "Linux freestyle-vm 6.1.102 #1 SMP PREEMPT_DYNAMIC Sun Nov  8 09:00:04 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        },
        {
          "index": 4,
          "ok": true,
          "sandbox_id": "vm-051150fee17b4f2f882ae222bcdfbd8c",
          "image": "freestyle default VM image",
          "spawn_ms": 645.6,
          "cold_start_ms": 949.7,
          "time_to_first_exec_ms": 304,
          "verify_ms": 312.7,
          "teardown_ms": 455.7,
          "first_command_stdout": "ok",
          "uname": "Linux freestyle-vm 6.1.102 #1 SMP PREEMPT_DYNAMIC Sun Nov  8 09:00:04 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        },
        {
          "index": 5,
          "ok": true,
          "sandbox_id": "vm-bc4dc3d1ce044537980408bbc2e8e27d",
          "image": "freestyle default VM image",
          "spawn_ms": 590.4,
          "cold_start_ms": 896.6,
          "time_to_first_exec_ms": 306.1,
          "verify_ms": 317.9,
          "teardown_ms": 444.1,
          "first_command_stdout": "ok",
          "uname": "Linux freestyle-vm 6.1.102 #1 SMP PREEMPT_DYNAMIC Sun Nov  8 09:00:04 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        }
      ],
      "summary": {
        "n_ok": 5,
        "n_fail": 0,
        "cold_start_ms": {
          "n": 5,
          "min": 896.6,
          "p50": 975.6,
          "max": 1572.1
        },
        "spawn_ms": {
          "n": 5,
          "min": 590.4,
          "p50": 659.6,
          "max": 1272
        },
        "time_to_first_exec_ms": {
          "n": 5,
          "min": 296.8,
          "p50": 304,
          "max": 316.1
        },
        "teardown_ms": {
          "n": 5,
          "min": 362.9,
          "p50": 379.3,
          "max": 455.7
        }
      }
    }
  ]
}