frank-large: swap to stock llama.cpp serving Qwen3.8-27B UD-Q8_K_XL with DFlash2

Replace the Kairic Edge ROCmFPX build with the unsloth b11030 stock
llama.cpp prebuilt (ROCm gfx1151) serving unsloth/Qwen3.8-27B-GGUF:
UD-Q8_K_XL (a 27B dense model, 31.5 GiB) with the z-lab DFlash2 Q4_K_M
drafter (depth 4) on the gfx1151 iGPU.

Serving shape: one 262,144-token conversation, q8_0 KV (the build lacks
fp8), text-only, greedy sampling, Qwen-Sharp v22.4.0 template.

- scripts/serve-frank-large.sh: stock llama.cpp + DFlash2 spec decode
- scripts/frank-large.env: new model/drafter/runtime, 262144 ctx / 1 slot
- scripts/download-frank-large.sh: per-file fetch, verify mode, idempotent
- scripts/frank-large.service: updated description
- scripts/deploy-remote.sh: updated pkill pattern + asset gates
- tests/frank_large_unit.bats: new model/runtime/spec assertions
- docs: new runbook (active), Kairic Edge runbook retired (rollback target)

Co-Authored-By: Claude <noreply@anthropic.com>

scripts/download-frank-large.sh

@@ -0,0 +1,89 @@
+#!/usr/bin/env bash
+# Download the frank-large payload on Dankclaw:
+#   - unsloth/Qwen3.8-27B-GGUF:UD-Q8_K_XL (the 27B dense main GGUF)
+#   - z-lab/Qwen3.8-27B-DFlash2-GGUF:Q4_K_M (the DFlash2 drafter)
+#
+#   bash scripts/download-frank-large.sh
+#   bash scripts/download-frank-large.sh --verify-only
+#
+# Integrity: every file is checked against its declared byte count and sha256
+# (the values below are the LFS oids from the Hub, 2026-09-21). An HF token
+# at ~/.cache/huggingface/token is used when present to clear the anonymous
+# rate limit on a 31 GB transfer.
+#
+# Layout after a successful run (MODEL_DIR):
+#   Qwen3.8-27B-UD-Q8_K_XL.gguf        31457991680  main GGUF
+#   Qwen3.8-27B-DFlash2-Q4_K_M.gguf    1143006816  DFlash2 drafter
+set -euo pipefail
+
+MODEL_DIR="/home/dank/models/Qwen3.8-27B-UD-Q8_K_XL"
+
+mode="download"
+[[ "${1:-}" == "--verify-only" ]] && mode="verify"
+
+token=""
+auth=()
+if [[ -r "$HOME/.cache/huggingface/token" ]]; then
+    token="$(tr -d '[:space:]' < "$HOME/.cache/huggingface/token")"
+    auth=(-H "Authorization: Bearer $token")
+fi
+
+dl() { # dl <url> <dest>
+    local url="$1" dest="$2"
+    [[ -s "$dest" ]] && return 0
+    mkdir -p "$(dirname "$dest")"
+    echo "fetching $dest"
+    curl -fL -C - "${auth[@]}" --retry 5 --retry-delay 3 -o "$dest" "$url"
+}
+
+# filename size sha256 url — the LFS oids from the Hub (2026-09-21)
+FILES=(
+    "Qwen3.8-27B-UD-Q8_K_XL.gguf 31457991680 af36ecb6b5db1407953345b746c14ac93f0657dda413910b4348683a2d990377 https://huggingface.co/unsloth/Qwen3.8-27B-GGUF/resolve/main/Qwen3.8-27B-UD-Q8_K_XL.gguf"
+    "Qwen3.8-27B-DFlash2-Q4_K_M.gguf 1143006816 1a25c56858e1ebe93f2718ac1d49d1151f9323325c1bbfd6209370f4db131ebd https://huggingface.co/z-lab/Qwen3.8-27B-DFlash2-GGUF/resolve/main/Qwen3.8-27B-DFlash2-Q4_K_M.gguf"
+)
+
+# Verify each file's byte count and sha256 (idempotent: a complete file is
+# re-checked, not re-downloaded).
+echo "verifying $MODEL_DIR against declared sizes + sha256"
+python3 - "$MODEL_DIR" <<'PY'
+import hashlib, os, sys
+model_dir = sys.argv[1]
+# (rel, size, sha256) triples — the LFS oids from the Hub (2026-09-21).
+specs = {
+    "Qwen3.8-27B-UD-Q8_K_XL.gguf": (31457991680, "af36ecb6b5db1407953345b746c14ac93f0657dda413910b4348683a2d990377"),
+    "Qwen3.8-27B-DFlash2-Q4_K_M.gguf": (1143006816, "1a25c56858e1ebe93f2718ac1d49d1151f9323325c1bbfd6209370f4db131ebd"),
+}
+ok = True
+for rel, (size, sha) in specs.items():
+    dest = os.path.join(model_dir, rel)
+    if not os.path.isfile(dest):
+        print(f"  MISSING {rel}")
+        ok = False
+        continue
+    actual_size = os.path.getsize(dest)
+    if actual_size != size:
+        print(f"  SIZE MISMATCH {rel}: {actual_size} != {size}")
+        ok = False
+        continue
+    h = hashlib.sha256()
+    with open(dest, "rb") as f:
+        for chunk in iter(lambda: f.read(1 << 24), b""):
+            h.update(chunk)
+    actual_sha = h.hexdigest()
+    if actual_sha != sha:
+        print(f"  SHA256 MISMATCH {rel}: {actual_sha}")
+        ok = False
+        continue
+    print(f"  OK {rel} ({actual_size} bytes)")
+if not ok:
+    sys.exit(1)
+PY
+
+if [[ "$mode" == "download" ]]; then
+    for line in "${FILES[@]}"; do
+        read -r rel _ _ url <<<"$line"
+        dl "$url" "$MODEL_DIR/$rel"
+    done
+fi
+
+echo "frank-large payload complete: $MODEL_DIR"