{
 "date": "2026-10-21",
 "change": "Attention domains skip their scale-up barriers in the directional hybrid protocol (no intra-domain state in that mode)",
 "native_source_sha256": "2c4456e0e7eb8d20cac168527fd8bd009f29f173553bf4bdd08c2f736c16abee",
 "topology": "2 waldorf nodes (gf41fb2 FFN, gf48cf2 Attention) x 2 NVIDIA H200, InfiniBand GIN",
 "correctness": {
  "result": "14/14 cross-node cases pass",
  "logs": [
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    "pod": "afdep-v21-xa",
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   {
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    "log": "xvm-f3-hyb-large-n0.log",
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   {
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    "log": "xvm-fp8-direct-large-n0.log",
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   {
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    "log_sha256": "044225a4ac6aa9c88f1997adf1e146d4fff7eb33bcdcff4d4cde7da74594da08"
   },
   {
    "pod": "afdep-v21-xb",
    "log": "xvm-bf16-direct-large-n1.log",
    "log_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
   },
   {
    "pod": "afdep-v21-xb",
    "log": "xvm-bf16-direct-small-n1.log",
    "log_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
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   {
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    "log": "xvm-bf16-generic-n1.log",
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   {
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   {
    "pod": "afdep-v21-xb",
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    "log_sha256": "8ef5712e4c0528c90828542971c1defc073120f864891d6162f6bf9013815dfa"
   },
   {
    "pod": "afdep-v21-xb",
    "log": "xvm-f1-hyb-large-n1.log",
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   },
   {
    "pod": "afdep-v21-xb",
    "log": "xvm-f1-hyb-small-n1.log",
    "log_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
   },
   {
    "pod": "afdep-v21-xb",
    "log": "xvm-f3-hyb-large-n1.log",
    "log_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
   },
   {
    "pod": "afdep-v21-xb",
    "log": "xvm-f3-hyb-small-n1.log",
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   },
   {
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    "log": "xvm-fp8-direct-large-n1.log",
    "log_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
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   {
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   },
   {
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   },
   {
    "pod": "afdep-v21-xb",
    "log": "xvm-fp8-hyb-large-n1.log",
    "log_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
   },
   {
    "pod": "afdep-v21-xb",
    "log": "xvm-fp8-hyb-small-n1.log",
    "log_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
   }
  ]
 },
 "screen": {
  "arms": {
   "head": {
    "_label": "xw"
   },
   "att_nobar": {
    "_label": "xatt"
   }
  },
  "native_source_sha256": {
   "head": "0ef3dfacbd277fc0485a4719ff2aeefebfcd118a779d4f2fb8326ca26f98ca68",
   "att_nobar": "162afd3c52ffe1d65ae2d4d7b5d595931689a11ee9a3f61409f671649b6958a0"
  },
  "passthrough": [
   "--payload",
   "bf16",
   "--routing",
   "random",
   "--hidden",
   "2048",
   "--tokens",
   "1",
   "8",
   "32",
   "128",
   "512",
   "2048",
   "--capacity",
   "2048",
   "--blocks",
   "6",
   "--hybrid",
   "on"
  ],
  "processes": [
   {
    "order": [
     "head",
     "att_nobar"
    ],
    "median_us": {
     "head": {
      "1": 74.80232000350952,
      "8": 82.08407878875732,
      "32": 84.27576065063477,
      "128": 105.61567783355713,
      "512": 203.400239944458,
      "2048": 544.8322296142578
     },
     "att_nobar": {
      "1": 72.87495851516724,
      "8": 80.2675199508667,
      "32": 82.7774429321289,
      "128": 103.73511791229248,
      "512": 201.15063667297363,
      "2048": 542.374382019043
     }
    }
   },
   {
    "order": [
     "att_nobar",
     "head"
    ],
    "median_us": {
     "att_nobar": {
      "1": 72.95543909072876,
      "8": 80.50096035003662,
      "32": 82.99783706665039,
      "128": 104.6339225769043,
      "512": 201.59727096557617,
      "2048": 543.0303382873535
     },
     "head": {
      "1": 74.91736173629761,
      "8": 82.4128007888794,
      "32": 84.59007740020752,
      "128": 105.81096172332764,
      "512": 203.94503593444824,
      "2048": 544.8808670043945
     }
    }
   },
   {
    "order": [
     "head",
     "att_nobar"
    ],
    "median_us": {
     "head": {
      "1": 74.73720073699951,
      "8": 82.13088035583496,
      "32": 84.52672004699707,
      "128": 106.22328281402588,
      "512": 203.21743965148926,
      "2048": 544.632568359375
     },
     "att_nobar": {
      "1": 72.76776075363159,
      "8": 80.26039600372314,
      "32": 82.89999961853027,
      "128": 104.02791976928711,
      "512": 200.98352432250977,
      "2048": 542.6650428771973
     }
    }
   }
  ],
  "table": [
   {
    "tokens": 1,
    "head": {
     "median_us": 74.802,
     "geomean_change_pct": 0.0,
     "repeats_faster": 0
    },
    "att_nobar": {
     "median_us": 72.875,
     "geomean_change_pct": -2.61,
     "repeats_faster": 3
    }
   },
   {
    "tokens": 8,
    "head": {
     "median_us": 82.131,
     "geomean_change_pct": 0.0,
     "repeats_faster": 0
    },
    "att_nobar": {
     "median_us": 80.268,
     "geomean_change_pct": -2.27,
     "repeats_faster": 3
    }
   },
   {
    "tokens": 32,
    "head": {
     "median_us": 84.527,
     "geomean_change_pct": 0.0,
     "repeats_faster": 0
    },
    "att_nobar": {
     "median_us": 82.9,
     "geomean_change_pct": -1.862,
     "repeats_faster": 3
    }
   },
   {
    "tokens": 128,
    "head": {
     "median_us": 105.811,
     "geomean_change_pct": 0.0,
     "repeats_faster": 0
    },
    "att_nobar": {
     "median_us": 104.028,
     "geomean_change_pct": -1.654,
     "repeats_faster": 3
    }
   },
   {
    "tokens": 512,
    "head": {
     "median_us": 203.4,
     "geomean_change_pct": 0.0,
     "repeats_faster": 0
    },
    "att_nobar": {
     "median_us": 201.151,
     "geomean_change_pct": -1.119,
     "repeats_faster": 3
    }
   },
   {
    "tokens": 2048,
    "head": {
     "median_us": 544.832,
     "geomean_change_pct": 0.0,
     "repeats_faster": 0
    },
    "att_nobar": {
     "median_us": 542.665,
     "geomean_change_pct": -0.384,
     "repeats_faster": 3
    }
   }
  ],
  "note": "Tree-isolated arms (each runs from its own tree); the screened variant's digest predates only the LOCAL_CHANGES scope text of the committed tree."
 }
}