{
  "schema": "anvil-campaign.service-regression-comparison/v1",
  "created_at": "2026-10-05T12:09:12.003450+00:00",
  "gate": "Each midpoint median <=1.10x baseline, all12 complete/owncanary/noerrors",
  "all_passed": true,
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      "artifact": "swift-cache-expanded-service-v2-8k-c1.json",
      "sha256": "9eb7e34447296bdfb8fddd0b6f6f02d2b09a07cf716e1b7faf29b6a558c2db5a",
      "baseline": {
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        "actual_prompt_max": 7433.0,
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        "historical_summary_convention": "nearest-rank p50; original historical summary preserved",
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      "all_canaries_pass": true,
      "midpoint_median_visible_ttft_ms": 3221.9330000007176,
      "midpoint_median_e2e_ms": 3651.734099999885,
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      "artifact": "swift-cache-expanded-service-v2-8k-c4.json",
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        "e2e_median_ms": 3588.9893999992637,
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        "actual_prompt_max": 7433.0,
        "actual_output_min": 142.0,
        "actual_output_max": 1075.0,
        "artifact": "swift-service-v2-8k-c4.json",
        "historical_summary_convention": "nearest-rank p50; original historical summary preserved",
        "midpoint_median_visible_ttft_ms": 3460.7630000000427,
        "midpoint_median_e2e_ms": 3596.1992499996995,
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      "cell": "24k-c1",
      "completed": 12,
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      "all_canaries_pass": true,
      "midpoint_median_visible_ttft_ms": 2951.803899999504,
      "midpoint_median_e2e_ms": 3100.1614999986487,
      "visible_ttft_ratio": 0.9398797740034868,
      "e2e_ratio": 0.9475640772102665,
      "gate_passed": true,
      "prompt_range": [
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      "output_range": [
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      "artifact": "swift-cache-expanded-service-v2-24k-c1.json",
      "sha256": "25c357c31a8f28a8391bcdb7d99df4f83b71f9c9f07babc4c602f4f577a44ab9",
      "baseline": {
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        "ttft_median_ms": 3116.5836000000127,
        "e2e_median_ms": 3256.4419000009366,
        "actual_prompt_min": 22467.0,
        "actual_prompt_max": 22495.0,
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        "actual_output_max": 425.0,
        "artifact": "swift-service-v2-24k-c1.json",
        "historical_summary_convention": "nearest-rank p50; original historical summary preserved",
        "midpoint_median_visible_ttft_ms": 3140.61860000038,
        "midpoint_median_e2e_ms": 3271.7170000005353,
        "sha256": "11a22697f00b96afad33385ba766a67ec17019a6d3a94115ef9439dc160113b6"
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    {
      "cell": "24k-c4",
      "completed": 12,
      "failed": 0,
      "all_canaries_pass": true,
      "midpoint_median_visible_ttft_ms": 8062.267799998153,
      "midpoint_median_e2e_ms": 9448.110150000502,
      "visible_ttft_ratio": 0.840853097961102,
      "e2e_ratio": 0.9624545538267638,
      "gate_passed": true,
      "prompt_range": [
        22467,
        22495
      ],
      "output_range": [
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      "artifact": "swift-cache-expanded-service-v2-24k-c4.json",
      "sha256": "b8ab4832b1965f5a9158605ea6b9bf855b32f1b7cd2ef3f62d45449eb5470c88",
      "baseline": {
        "cell": "24k-c4",
        "completed": 12,
        "ttft_median_ms": 9502.766399999018,
        "e2e_median_ms": 9814.59679999898,
        "actual_prompt_min": 22467.0,
        "actual_prompt_max": 22495.0,
        "actual_output_min": 217.0,
        "actual_output_max": 470.0,
        "artifact": "swift-service-v2-24k-c4.json",
        "historical_summary_convention": "nearest-rank p50; original historical summary preserved",
        "midpoint_median_visible_ttft_ms": 9588.200149999466,
        "midpoint_median_e2e_ms": 9816.68184999944,
        "sha256": "54d4ff42a6d4e481e27aedc68cf1ab445f207685a0c679836a8bbaaca799ac4e"
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  ],
  "limits": [
    "Variable output lengths; no fixed-output decode speed claim",
    "Same ordered cells and request controls; sequential historical baseline versus current expanded, screening not broad performance proof"
  ],
  "method_note": "Recomputed ordinary midpoint medians from both raw request populations; historical baseline summary used nearest-rank p50 and is retained without modification."
}