{
  "schema_version": 2,
  "transport": "HTTP",
  "workload": "fastapi-upstream-items",
  "provenance": {
    "repository": "fastapi/full-stack-fastapi-template",
    "commit": "b1125d8839482cb7bbae603ddc6d0081bf87532e",
    "original_model_blob": "181acf2bf16b4285becb5a5626cf3aa56210211e",
    "patched_model_sha256": "7f9f207c3cb6c71edfbb25e43b8006e96acf994e09a044e39a519280f6ea7ae7",
    "lock_sha256": "4a46cbffbb76f1fcfdb77e50d2106d183fda30a6b178da5f2e2dd5079801dda9",
    "change": "v2 Item.title maps to physical column display_title; API title stays unchanged"
  },
  "application_factory": "__main__:integration.<locals>.UpstreamApplication",
  "applications": [
    {
      "version": "v1",
      "pid": 134,
      "transport": "HTTP"
    },
    {
      "version": "v2",
      "pid": 187,
      "transport": "HTTP"
    },
    {
      "version": "v1",
      "pid": 240,
      "transport": "HTTP",
      "phase": "rollback"
    }
  ],
  "run_id": "764d92a0-8bda-487d-b198-aadae9eb899f",
  "scenario": "breaking",
  "commit": "2ec32c7eb316c4f1cedf6e92a27b3e240de55c60",
  "pipeline_url": "https://gitlab.com/gitlab-ai-hackathon/transcend-october-2026/43208246/showcase/-/pipelines/2980660966",
  "created_at": "2026-10-23T10:35:10.048077+00:00",
  "fixture_sha256": "3cf598c14f3b744723e71c3e2896a24b370373192d89db147df166b0162fb55c",
  "checks": [
    {
      "id": "applications_started",
      "stage": "baseline",
      "version": "v1",
      "operation": "Start independent old HTTP application",
      "status": "PASS",
      "duration_ms": 2044.2
    },
    {
      "id": "baseline_read",
      "stage": "baseline",
      "version": "v1",
      "operation": "Read existing project item",
      "status": "PASS",
      "duration_ms": 25.25
    },
    {
      "id": "baseline_write",
      "stage": "baseline",
      "version": "v1",
      "operation": "Create and read project item",
      "status": "PASS",
      "duration_ms": 14.91
    },
    {
      "id": "migration",
      "stage": "migration",
      "version": "-",
      "operation": "Apply candidate SQL",
      "status": "PASS",
      "duration_ms": 1.77
    },
    {
      "id": "new_application_started",
      "stage": "target",
      "version": "v2",
      "operation": "Start independent new HTTP application",
      "status": "PASS",
      "duration_ms": 1075.49
    },
    {
      "id": "new_read",
      "stage": "target",
      "version": "v2",
      "operation": "Read migrated project item",
      "status": "PASS",
      "duration_ms": 25.56
    },
    {
      "id": "new_write",
      "stage": "target",
      "version": "v2",
      "operation": "Create and read project item",
      "status": "PASS",
      "duration_ms": 282.94
    },
    {
      "id": "old_read",
      "stage": "rollout",
      "version": "v1",
      "operation": "Read migrated project item",
      "status": "FAIL",
      "sqlstate": "42703",
      "failure_kind": "compatibility",
      "duration_ms": 6.33
    },
    {
      "id": "old_write",
      "stage": "rollout",
      "version": "v1",
      "operation": "Create and read project item",
      "status": "FAIL",
      "sqlstate": "42703",
      "failure_kind": "compatibility",
      "duration_ms": 5.22
    },
    {
      "id": "old_to_new",
      "stage": "mixed",
      "version": "v1 \u2192 v2",
      "operation": "Old creates; new reads",
      "status": "FAIL",
      "sqlstate": "42703",
      "failure_kind": "compatibility",
      "duration_ms": 5.31
    },
    {
      "id": "new_to_old",
      "stage": "mixed",
      "version": "v2 \u2192 v1",
      "operation": "New creates; old reads",
      "status": "FAIL",
      "sqlstate": "42703",
      "failure_kind": "compatibility",
      "duration_ms": 296.06
    },
    {
      "id": "new_update_to_old",
      "stage": "mixed",
      "version": "v2 \u2192 v1",
      "operation": "New updates; old reads",
      "status": "FAIL",
      "sqlstate": "42703",
      "failure_kind": "compatibility",
      "duration_ms": 285.83
    },
    {
      "id": "old_update_to_new",
      "stage": "mixed",
      "version": "v1 \u2192 v2",
      "operation": "Old updates; new reads",
      "status": "FAIL",
      "sqlstate": "42703",
      "failure_kind": "compatibility",
      "duration_ms": 4.88
    },
    {
      "id": "rollback_restart",
      "stage": "app_rollback",
      "version": "v1",
      "operation": "Stop both apps; restart v1; verify new process identity",
      "status": "PASS",
      "duration_ms": 1434.11
    },
    {
      "id": "rollback_read",
      "stage": "app_rollback",
      "version": "v1",
      "operation": "Read latest acknowledged value after rollout",
      "status": "FAIL",
      "sqlstate": "42703",
      "failure_kind": "compatibility",
      "duration_ms": 23.89
    },
    {
      "id": "rollback_new_data",
      "stage": "app_rollback",
      "version": "v1",
      "operation": "Read data committed by v2",
      "status": "FAIL",
      "sqlstate": "42703",
      "failure_kind": "compatibility",
      "duration_ms": 4.61
    }
  ],
  "completed": true,
  "cleanup_ok": true,
  "limitations": [
    "Synthetic project item records only; no production data or traffic.",
    "Two independent instances of the pinned upstream FastAPI backend with real login and item CRUD routes; synthetic data.",
    "Sequential interleavings; no concurrent transactions or load test.",
    "No lock-duration, large backfill, replication, or production deployment verification.",
    "Rollback means returning to v1 code on the migrated schema, not undoing SQL.",
    "GO applies only to this fixture and these declared probes."
  ],
  "cleanup_evidence": {
    "schema": "acceptance_848806ee3971476b9b1f301037c41b0d",
    "schema_state": "removed",
    "applications_stopped": true,
    "connection_closed": true
  },
  "postgres_version": 160015,
  "verdict": "BLOCK"
}