bench: add prod2048 config (runner batch sizes on chat profile); docs: ubatch 4096 results

AGENTS.md

@@ -137,7 +137,11 @@ The runtime routes qualified prompt and verification shapes through the
 RDNA 3.5 native IU4 matrix instruction. The build uses the release script
 against the private TheRock ROCm 7.15 SDK kept in the retired ling3-ciru
 venv. The model files (GGUF + FFN/GDN/GDN-Output .pfs, 26.05 GiB) live in
-`/home/dank/models/Kairic-Qwen3.8-27B-IU4-Edge/`.
+`/home/dank/models/Kairic-Qwen3.8-27B-IU4-Edge/`. The production profile
+adds batch 4096 / ubatch 4096, `--no-mmap`, and reasoning on (deepseek
+format, preserve_thinking) on top of the pinned runner. Ubatch 4096 slows
+prefill ~25% versus ubatch 2048 with no decode change; see
+docs/kairic-edge.md before changing the batch profile.
 
 **Release gap — CK `config.h`:** the pinned CK commit ships only
 `config.h.in`; the release script and guide never generate
@@ -210,7 +214,7 @@ graph TD
 
 - `sudo` on both boxes needs a tty. Remote sudo steps fail non-interactively. Use `echo '<password>' | sudo -S <command>`.
 - Never run `pkill -f` with a pattern that appears in your own command line. It kills your ssh session. Use `pkill -x <exact-name>`.
-- Model load is slow: Dankserver loads the 30.6 GB Q6_K_P through RAM (`--no-mmap`, MoE experts on CPU) in a few minutes cold; Dankclaw Kairic loads the 26.05 GiB payload in a few minutes (page-cache warm). Health returns 503 while loading. Do not kill the process. `deploy.sh` waits up to 20 minutes on both targets (see `HEALTH_WAIT`).
+- Model load is slow: Dankserver loads the 30.6 GB Q6_K_P through RAM (`--no-mmap`, MoE experts on CPU) in a few minutes cold; Dankclaw Kairic loads the 26.05 GiB payload in ~12 s with a warm page cache, a few minutes cold. Health returns 503 while loading. Do not kill the process. `deploy.sh` waits up to 20 minutes on both targets (see `HEALTH_WAIT`).
 - A client abort and a server release look different in the journal. A client abort logs `W srv stop: cancel task, id_task = N`. A natural stop (EOS or limit) logs only `slot release` with `truncated = 0`. The server never preempts a running generation; when all slots are busy, new tasks defer into a queue. See the 2026-08-13 incident in [docs/deployment.md](docs/deployment.md).
 - Retired hardware history: the Dankserver 35B cuBLAS crash and the DFlash premature-EOS bug are historical; see [docs/dankserver-vram-growth.md](docs/dankserver-vram-growth.md) and [docs/qwen3.8-spec-matrix.md](docs/qwen3.8-spec-matrix.md). The FastFlowLM NPU endpoint is retired; see [docs/FastFlowLM NPU Inference.md](docs/FastFlowLM%20NPU%20Inference.md).