docs: llama.cpp stack at production state (2026-08-16) + sibling-project links

- spec matrix: new 'Production state' section — PP head (RPC0+ROCm0,
  split 0.40/0.60), pool 401400 / n_ctx_slot 200704 live, MTP n_max 4
  over ngram-mod fallback (journal acceptance stats), f16 KV.
  2026-08-15 standalone state marked superseded (Vulkan0 verdict was
  standalone-only; PP head runs ROCm0 by default).
- deployment.md: fix frank-default-large section (MTP not 'no draft',
  ROCm0 not Vulkan0, 200704/slot not 262144, f16 not q8_0 KV,
  serve-pp-head.sh not serve-llama-frank-large.sh).
- PP deployment doc: production-state section; test-day open questions
  resolved with journal evidence.
- index.md: NPU line now qwen3.6-moe:35b-a3b @262k ctx; Sibling
  projects section -> serverAppConfigs.
- AGENTS.md: overview reflects PP+MTP reality; sibling pointer.

docs/Pipeline Parallelism/Qwen3.8 PP Deployment.md

@@ -5,6 +5,33 @@ Split Qwen3.8-27B UD-Q8_K_XL across the Strix Halo iGPU (head) and the RTX
 morning-of runbook. Research background:
 [Qwen3.8 Strix optimizations](../../qwen3.8-strix-optimizations.md).
 
+## Production state (promoted 2026-08-16)
+
+This split is the production `frank-default-large` service (renamed from
+`frank-pp-head`, commit `48142f5`). Current state, verified against the
+live journal (2026-08-16, 15:03 load):
+
+- Split `0.40,0.60` (not the test-day `1,1`): 40% of the layers on the
+  3090 — its maximum under the 2x200700 f16 KV budget — 60% on the iGPU.
+- Pool `401400`, `PARALLEL=2`, live `n_ctx_slot = 200704`.
+- MTP enabled: `--spec-type draft-mtp --spec-draft-n-max 4` + ngram-mod
+  fallback (48/64/24). Journal acceptance: MTP mean len 3.00
+  (per-position 0.730/0.541/0.411/0.323).
+- Head GPU side: **ROCm0** (no `--device` flag; HIP registers before
+  Vulkan). KV at load: 15680 MiB ROCm0 + 9408 MiB RPC0.
+- Unit `frank-default-large.service`, launched through
+  `serve-pp-head.sh` + `frank-default-large.env`.
+
+Open questions from the test day, resolved:
+
+1. MTP (in the last layer group, iGPU side) drafts cleanly across the RPC
+   boundary — see the acceptance figures above.
+2. Two parallel slots hold under production load: 150k-token prompts
+   prefill and generate, slots turn over every few minutes, no RPC
+   faults observed.
+3. Long prompts (~160k tokens) prefill on the ROCm0 side with no
+   RPC-boundary anomaly in production traffic.
+
 ## Topology
 
 ```