{
  "artifact": "TR-A002",
  "type": "machine_emitted_sandbox_trace",
  "emitted_by": "scripts/generate-tr-a002.mjs (Origin trace emitter)",
  "label": "Machine-emitted by the Origin trace emitter over one SIMULATED, SANDBOXED agent workflow. Every event is committed to a real SHA-256 hash chain; the final event seals the chain. Not a customer deployment, not production SaaS, not a performance claim. The payments.refund side effect executes in a sandbox only — no live money moves. Scenario inputs are simulated. Timestamps are deterministic pseudo-timestamps.",
  "scenario": "refund exception handling",
  "agent": "payments-ops-agent",
  "policy": {
    "id": "refund-cap-v0.3",
    "rules": [
      "auto-allow refunds <= $250.00",
      "require human approval for refunds > $250.00 and <= $500.00",
      "deny / block refunds above the approved scope"
    ]
  },
  "risk_owner": "payments-on-call",
  "proxy_tool": "payments.refund",
  "sandbox": true,
  "hash_spec": {
    "algorithm": "sha256",
    "canonicalization": "event_hash = SHA-256 hex of the canonical JSON of the event (all fields except event_hash, including prev_hash). Canonical JSON: object keys sorted lexicographically at every level, UTF-8, JSON separators ',' and ':', no whitespace.",
    "genesis_prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
    "final_digest_is": "the event_hash of the sealing event (evidence.digest_sealed), which commits the chain root of events 1–11.",
    "verify": "npm run proof:verify"
  },
  "event_count": 12,
  "final_digest": "ca1d4690206e4dcf3d654b907d02d2bccf9bcdc16ddc555071fec21874578b32",
  "log_digest": "91bbdf8dd38214a254c5c775a09fc9a449ed499f6a59ce3fc449a5bd928ccbf9",
  "events": [
    {
      "seq": 1,
      "event_id": "evt_001",
      "ts": "2026-07-04T17:00:00.000Z",
      "actor": "payments-ops-agent",
      "action": "proposal.created",
      "tool": "payments.refund",
      "policy_id": null,
      "verdict": null,
      "approver": null,
      "side_effect": {
        "tool": "payments.refund",
        "amount_usd": 480,
        "target": "order_8842",
        "executed": false
      },
      "sandbox": true,
      "detail": "Agent proposed a refund of $480.00 for order_8842 on the dispute-exception path.",
      "prev_hash": "0000000000000000000000000000000000000000000000000000000000000000",
      "event_hash": "8fa159f391851f662390bcd4f43d7aa3b47c5634bae8e5fd887c93b424e0c57b"
    },
    {
      "seq": 2,
      "event_id": "evt_002",
      "ts": "2026-07-04T17:00:03.000Z",
      "actor": "origin-policy-gate",
      "action": "policy.evaluated",
      "tool": "payments.refund",
      "policy_id": "refund-cap-v0.3",
      "verdict": null,
      "approver": null,
      "side_effect": null,
      "sandbox": true,
      "detail": "Evaluated the proposal against refund-cap-v0.3: $480.00 is above the $250.00 auto-allow cap and within the $500.00 approval ceiling.",
      "prev_hash": "8fa159f391851f662390bcd4f43d7aa3b47c5634bae8e5fd887c93b424e0c57b",
      "event_hash": "eb0e62da71ad316c6c974cfac4564305f684f8457d3d4ed119fca62daa28c4ea"
    },
    {
      "seq": 3,
      "event_id": "evt_003",
      "ts": "2026-07-04T17:00:06.000Z",
      "actor": "origin-policy-gate",
      "action": "verdict.require_approval",
      "tool": "payments.refund",
      "policy_id": "refund-cap-v0.3",
      "verdict": "require_approval",
      "approver": "payments-on-call",
      "side_effect": null,
      "sandbox": true,
      "detail": "Verdict: require human approval — amount falls in the $250.00–$500.00 approval band. Risk owner: payments-on-call.",
      "prev_hash": "eb0e62da71ad316c6c974cfac4564305f684f8457d3d4ed119fca62daa28c4ea",
      "event_hash": "2370499ffa83fbd67c07d4b6accccf1fd7df0693453cc2d45b4a1870305c84b0"
    },
    {
      "seq": 4,
      "event_id": "evt_004",
      "ts": "2026-07-04T17:00:09.000Z",
      "actor": "origin-proxy",
      "action": "proxy.held",
      "tool": "payments.refund",
      "policy_id": "refund-cap-v0.3",
      "verdict": "require_approval",
      "approver": "payments-on-call",
      "side_effect": {
        "tool": "payments.refund",
        "amount_usd": 480,
        "target": "order_8842",
        "executed": false,
        "held": true
      },
      "sandbox": true,
      "detail": "Side effect held at the tool-call proxy — payments.refund was not dispatched while approval is pending.",
      "prev_hash": "2370499ffa83fbd67c07d4b6accccf1fd7df0693453cc2d45b4a1870305c84b0",
      "event_hash": "025c9a8445ab27c17e28d2d23c5daf562c166465035e11e0b728bdd10bbb0e86"
    },
    {
      "seq": 5,
      "event_id": "evt_005",
      "ts": "2026-07-04T17:00:12.000Z",
      "actor": "origin-proxy",
      "action": "approval.requested",
      "tool": null,
      "policy_id": "refund-cap-v0.3",
      "verdict": null,
      "approver": "payments-on-call",
      "side_effect": null,
      "sandbox": true,
      "detail": "Approval requested from payments-on-call with the proposal, the policy verdict, and the exact side-effect scope.",
      "prev_hash": "025c9a8445ab27c17e28d2d23c5daf562c166465035e11e0b728bdd10bbb0e86",
      "event_hash": "91c98d41e2c18a520a30bc35f3d54210324985733da5aeb0d35c0cf3204748e6"
    },
    {
      "seq": 6,
      "event_id": "evt_006",
      "ts": "2026-07-04T17:00:15.000Z",
      "actor": "payments-on-call",
      "action": "approval.granted",
      "tool": null,
      "policy_id": "refund-cap-v0.3",
      "verdict": "approved",
      "approver": "payments-on-call",
      "side_effect": null,
      "sandbox": true,
      "detail": "Human approver payments-on-call granted the refund of $480.00 on order_8842.",
      "prev_hash": "91c98d41e2c18a520a30bc35f3d54210324985733da5aeb0d35c0cf3204748e6",
      "event_hash": "a36fbfe3e0777da5a56ff36afb1984d5c7087a1cfd1f88e931466bdfae1f670b"
    },
    {
      "seq": 7,
      "event_id": "evt_007",
      "ts": "2026-07-04T17:00:18.000Z",
      "actor": "origin-proxy",
      "action": "proxy.executed_sandbox",
      "tool": "payments.refund",
      "policy_id": "refund-cap-v0.3",
      "verdict": "approved",
      "approver": "payments-on-call",
      "side_effect": {
        "tool": "payments.refund",
        "amount_usd": 480,
        "target": "order_8842",
        "executed": true,
        "sandbox": true,
        "live_money": false
      },
      "sandbox": true,
      "detail": "Executed in the sandbox — a simulated payments.refund of $480.00 on order_8842. No live money moved.",
      "prev_hash": "a36fbfe3e0777da5a56ff36afb1984d5c7087a1cfd1f88e931466bdfae1f670b",
      "event_hash": "e977481264f83939001e7625fa33ae1e206626665e02c8662389c5706f183367"
    },
    {
      "seq": 8,
      "event_id": "evt_008",
      "ts": "2026-07-04T17:00:21.000Z",
      "actor": "origin-recorder",
      "action": "action.recorded",
      "tool": null,
      "policy_id": "refund-cap-v0.3",
      "verdict": "approved",
      "approver": "payments-on-call",
      "side_effect": null,
      "sandbox": true,
      "detail": "Recorded the executed action to the audit chain with its approver, policy verdict, and side-effect scope.",
      "prev_hash": "e977481264f83939001e7625fa33ae1e206626665e02c8662389c5706f183367",
      "event_hash": "ac5ff382654889aa5fd1e5f885edbb5b74d8c3f505139e16d2457ceea89ce947"
    },
    {
      "seq": 9,
      "event_id": "evt_009",
      "ts": "2026-07-04T17:00:24.000Z",
      "actor": "payments-ops-agent",
      "action": "retry.proposed_over_scope",
      "tool": "payments.refund",
      "policy_id": null,
      "verdict": null,
      "approver": null,
      "side_effect": {
        "tool": "payments.refund",
        "amount_usd": 920,
        "target": "order_8842",
        "executed": false
      },
      "sandbox": true,
      "detail": "Agent proposed a second refund of $920.00 on order_8842 — above the $500.00 approval ceiling.",
      "prev_hash": "ac5ff382654889aa5fd1e5f885edbb5b74d8c3f505139e16d2457ceea89ce947",
      "event_hash": "65c10aa7e05bfb2f4e7ff5e3e22fdb643fa14ad5704e418ede993c8630e031ae"
    },
    {
      "seq": 10,
      "event_id": "evt_010",
      "ts": "2026-07-04T17:00:27.000Z",
      "actor": "origin-policy-gate",
      "action": "verdict.deny_or_block",
      "tool": "payments.refund",
      "policy_id": "refund-cap-v0.3",
      "verdict": "deny",
      "approver": null,
      "side_effect": null,
      "sandbox": true,
      "detail": "Verdict: deny — $920.00 exceeds the $500.00 approval ceiling. Over the approved scope.",
      "prev_hash": "65c10aa7e05bfb2f4e7ff5e3e22fdb643fa14ad5704e418ede993c8630e031ae",
      "event_hash": "89eef0a0876b22e98fb41166cbbea474acdf94969d5383ea767d3e46f6b2323f"
    },
    {
      "seq": 11,
      "event_id": "evt_011",
      "ts": "2026-07-04T17:00:30.000Z",
      "actor": "origin-proxy",
      "action": "proxy.blocked",
      "tool": "payments.refund",
      "policy_id": "refund-cap-v0.3",
      "verdict": "deny",
      "approver": null,
      "side_effect": {
        "tool": "payments.refund",
        "amount_usd": 920,
        "target": "order_8842",
        "executed": false,
        "blocked": true
      },
      "sandbox": true,
      "detail": "Side effect BLOCKED at the proxy — the over-scope refund was never dispatched. The block itself is recorded.",
      "prev_hash": "89eef0a0876b22e98fb41166cbbea474acdf94969d5383ea767d3e46f6b2323f",
      "event_hash": "3af6a34d3035faa9aa599c035dde7ae1e10d37e517df5e617cc6319ed0236453"
    },
    {
      "seq": 12,
      "event_id": "evt_012",
      "ts": "2026-07-04T17:00:33.000Z",
      "actor": "origin-recorder",
      "action": "evidence.digest_sealed",
      "tool": null,
      "policy_id": "refund-cap-v0.3",
      "verdict": null,
      "approver": null,
      "side_effect": null,
      "sandbox": true,
      "detail": "Evidence package sealed — the hash chain over the preceding 11 events is committed to the final digest.",
      "chain_root": "3af6a34d3035faa9aa599c035dde7ae1e10d37e517df5e617cc6319ed0236453",
      "prev_hash": "3af6a34d3035faa9aa599c035dde7ae1e10d37e517df5e617cc6319ed0236453",
      "event_hash": "ca1d4690206e4dcf3d654b907d02d2bccf9bcdc16ddc555071fec21874578b32"
    }
  ]
}