diff --git a/docs/hrx.md b/docs/hrx.md
index b6dffedb0..b877cb368 100644
--- a/docs/hrx.md
+++ b/docs/hrx.md
@@ -162,6 +162,14 @@ were observed.
   5.4K-token prompt in a new process 4.46 -> 3.43 s, first short prompt 0.47 -> 0.22 s, with
   identical output. `GGML_HRX_JIT_CACHE=0` turns it off; it is off while a Loom sanitizer is set.
   Deleting the directory is always safe.
+- **Fused residual scale (llama.cpp #35).** ZAYA scales both residual branches twice per layer,
+  `(x + bx) * sx + (r + br) * sr`, which ran as up to nine ADD / MUL dispatches per layer. Each side
+  now runs as one dispatch (`common.res_scale_pair.*`, `ops/res_scale_pair_f32.loom`): 3,366 -> 3,165
+  dispatches per token, bitwise the same output, ZAYA1-8B HRX0 decode 67.0 -> ~69.6 tok/s and
+  pp512 2,109 -> 2,183. `GGML_HRX_DISABLE_DISPATCH=res_scale_pair` turns it off. At decode most of
+  a ZAYA token is small dispatches and the ~1.8 us gaps between them, not matmuls; the profiler
+  (`HRX_PROFILE_MODE=dispatch`) shows which ones. Profile through `llama-server`: `llama-bench`
+  under the profiler fails.
 
 ### Known issues on `HRX0`
 
diff --git a/registry/architectures.json b/registry/architectures.json
index 3c2a20c5a..1c404230a 100644
--- a/registry/architectures.json
+++ b/registry/architectures.json
@@ -2,7 +2,7 @@
  "about": "HF architecture -> GGUF architecture and the backends whose code accepts it. Generated by tools/registry_build.py from the pinned sources; do not edit.",
  "sources": {
   "llama.cpp (vulkan)": "cecf3ee01d9d99378e98bfea95f51cac714b04b8",
-  "llama.cpp (hrx)": "b408831d6beffabfb054f69748ad57338f054cce",
+  "llama.cpp (hrx)": "45c17708344627b0731ff28d4075da65a3bfa6ff",
   "zinc": "29bc350ac4cbf9f110ec628b9e177ea04ac816fb"
  },
  "counts": {
diff --git a/third_party/llama.cpp b/third_party/llama.cpp
index b408831d6..45c177083 160000
--- a/third_party/llama.cpp
+++ b/third_party/llama.cpp
@@ -1 +1 @@
-Subproject commit b408831d6beffabfb054f69748ad57338f054cce
+Subproject commit 45c17708344627b0731ff28d4075da65a3bfa6ff