{
 "date": "2026-10-21",
 "change": "three-domain validation of the role path and directional hybrid protocol; GPU-suite reference models DeepEP's BF16 reduction tree",
 "native_source_sha256": "2c4456e0e7eb8d20cac168527fd8bd009f29f173553bf4bdd08c2f736c16abee",
 "topology": "3 waldorf nodes x 2 NVIDIA H200 (gf41fb2, gf48cf2, gf49e9c), InfiniBand GIN, physical domain [3, 2], 6 ranks",
 "layouts": {
  "--ffn-ranks 2": "1 FFN domain + 2 Attention domains (directional)",
  "--ffn-ranks 4": "2 FFN domains + 1 Attention domain (directional)",
  "--ffn-ranks 1 / 3": "mixed-role domains (union hybrid)"
 },
 "correctness": {
  "result": "14/14 three-domain cases pass (BF16/FP8 x f2/f4 hybrid small/large, generic controls, direct small, f1/f3 small); the two-domain f2 large case also passes with the new reference",
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 },
 "reference_note": "With more than one FFN domain, DeepEP's hybrid combine rounds each FFN domain's partial to BF16 before the cross-domain sum. The suite's previous single-rounding reference therefore failed by one BF16 ulp (0.25 at ~40) on 16 boundary-straddling rows of the f4 large case, identically for Masked (generic), the union hybrid control and the directional protocol. The reference now rounds once per stage (FFN rank, FFN domain when hybrid, total); it equals the previous reference whenever intermediates are exact.",
 "screen": {
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  "native_source_sha256": {
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   "union_hybrid": "2c4456e0e7eb8d20cac168527fd8bd009f29f173553bf4bdd08c2f736c16abee",
   "masked": "2c4456e0e7eb8d20cac168527fd8bd009f29f173553bf4bdd08c2f736c16abee"
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  "arms": {
   "afd": {
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   "union_hybrid": {
    "_label": "xh",
    "_env": {
     "AFDEP_UNION_HYBRID": "1"
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   },
   "masked": {
    "_label": "xh",
    "role_aware": false
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  "passthrough": [
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   "--routing",
   "random",
   "--hidden",
   "2048",
   "--ffn-ranks",
   "2",
   "--attention-ranks",
   "4",
   "--experts",
   "128",
   "--tokens",
   "1",
   "8",
   "32",
   "128",
   "512",
   "2048",
   "--capacity",
   "2048",
   "--blocks",
   "6",
   "--hybrid",
   "on"
  ],
  "processes": [
   {
    "order": [
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    "median_us": {
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  "table": [
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   {
    "tokens": 512,
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  ],
  "note": "The two-FFN-domain screen interrupted by preemption was repeated on a new pod set (two_ffn_domains)."
 },
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