docs(paged): record phase0 decode repro

Record comparable graph-node-traced paged and vLLM decode difference-method artifacts for the GB10 parity reopen.

Assisted-by: Codex:gpt-5

backend/cpp/llama-cpp-localai-paged/docs/GB10_PARITY_PHASE0_RESULTS.md

@@ -33,6 +33,57 @@ Dense paged prefill:
 | 512 | 4 | 32 | 16512 | 16.749 | 978.18 | 0.842 | 152.03 | 17.591 | 938.64 |
 | 2048 | 4 | 32 | 65664 | 63.791 | 1027.35 | 0.687 | 186.29 | 64.479 | 1018.38 |
 
+## Decode Difference-Method Reproduction
+
+Paged llama.cpp artifacts:
+
+- `~/bench/reopen_phase0/paged_decode_nsys/paged_moe_n256_ntg16.nsys-rep`
+- `~/bench/reopen_phase0/paged_decode_nsys/paged_moe_n256_ntg16.bench.log`
+- `~/bench/reopen_phase0/paged_decode_nsys/paged_moe_n256_ntg64.nsys-rep`
+- `~/bench/reopen_phase0/paged_decode_nsys/paged_moe_n256_ntg64.bench.log`
+
+Paged llama.cpp rows:
+
+| PP | TG | B | N_KV | T_PP s | S_PP t/s | T_TG s | S_TG t/s | T s | S t/s |
+|----|----|---|------|--------|----------|--------|----------|-----|-------|
+| 128 | 16 | 256 | 36864 | 14.933 | 2194.39 | 4.502 | 909.80 | 19.435 | 1896.81 |
+| 128 | 64 | 256 | 49152 | 14.949 | 2191.96 | 17.924 | 914.09 | 32.873 | 1495.21 |
+
+Paged difference-method decode:
+
+- Token delta: `256 * (64 - 16) = 12288`
+- Wall delta: `17.924 - 4.502 = 13.422 s`
+- Decode throughput: `915.51 t/s`
+
+vLLM artifacts:
+
+- `~/bench/reopen_phase0/vllm_decode_nsys/vllm_version.txt`
+- `~/bench/reopen_phase0/vllm_decode_nsys/dec_npl256_ntg16.nsys-rep`
+- `~/bench/reopen_phase0/vllm_decode_nsys/dec_npl256_ntg16.run.log`
+- `~/bench/reopen_phase0/vllm_decode_nsys/dec_npl256_ntg16.kern.csv`
+- `~/bench/reopen_phase0/vllm_decode_nsys/dec_npl256_ntg16.gpu_trace.csv`
+- `~/bench/reopen_phase0/vllm_decode_nsys/dec_npl256_ntg64.nsys-rep`
+- `~/bench/reopen_phase0/vllm_decode_nsys/dec_npl256_ntg64.run.log`
+- `~/bench/reopen_phase0/vllm_decode_nsys/dec_npl256_ntg64.kern.csv`
+- `~/bench/reopen_phase0/vllm_decode_nsys/dec_npl256_ntg64.gpu_trace.csv`
+
+vLLM version: `0.23.0`
+
+vLLM profiled rows:
+
+| NSEQ | GEN | Generated tokens | Wall s | Logged tok/s |
+|------|-----|------------------|--------|--------------|
+| 256 | 16 | 4096 | 6.195 | 661.2 |
+| 256 | 64 | 16384 | 17.607 | 930.5 |
+
+vLLM difference-method decode:
+
+- Token delta: `16384 - 4096 = 12288`
+- Wall delta: `17.607 - 6.195 = 11.412 s`
+- Decode throughput: `1076.76 t/s`
+
+Clean reproduced paged/vLLM decode ratio: `85.0%`.
+
 ## Clean Build
 
 First clean build attempt:

docs/superpowers/plans/2026-06-30-gb10-parity-reopen.md

@@ -482,7 +482,12 @@ Commit succeeds.
 **Files:**
 - Modify: `backend/cpp/llama-cpp-localai-paged/docs/GB10_PARITY_PHASE0_RESULTS.md`
 
-- [ ] **Step 1: Dispatch a vLLM harness discovery subagent**
+- [x] **Step 1: Dispatch a vLLM harness discovery subagent**
+
+Result: read-only subagent found prior harnesses
+`/home/mudler/vllm_moe_nsys.sh` and `/home/mudler/vllm_moe_prof.py`, plus a
+concrete `~/highN_vllm_diff` `NSEQ`/`GEN` command sequence using
+`nsys profile --cuda-graph-trace=node`.
 
 Prompt:
 
@@ -496,7 +501,7 @@ Expected:
 Subagent returns a concrete vLLM command sequence or reports that no prior harness exists.
 ```
 
-- [ ] **Step 2: Run paged graph-node-traced decode difference-method**
+- [x] **Step 2: Run paged graph-node-traced decode difference-method**
 
 Run only after DGX preflight passes:
 
@@ -525,7 +530,7 @@ Expected:
 Two `.nsys-rep` files and two `.bench.log` files exist.
 ```
 
-- [ ] **Step 3: Run vLLM graph-node-traced decode difference-method**
+- [x] **Step 3: Run vLLM graph-node-traced decode difference-method**
 
 Use the exact command sequence from Step 1. Required properties:
 
@@ -543,7 +548,7 @@ Expected:
 Two vLLM graph-node-traced artifacts exist and can be reduced by the difference method.
 ```
 
-- [ ] **Step 4: Update Phase 0 results and commit**
+- [x] **Step 4: Update Phase 0 results and commit**
 
 Record paged and vLLM tokens/s using: