frank-large: Q4_K_XL payload + 4 x 163840 sessions (f16 KV)

Frank's call. Payload: ajgazin's abliterated Swift-1.5 UD-Q8_K_XL (29.3 GiB,
SWIFT OPEN LICENSE) -> unsloth/Qwen3.8-27B-GGUF UD-Q4_K_XL (16.35 GiB,
sha256 3f227079...b01e, vanilla/Apache-2.0). NOTE: the endpoint is no longer
uncensored — that was one of the reasons for the Swift payload on 2026-09-28.

New fetcher scripts/download-frank-large-q4.sh (no auth header: repo is public
and ungated; size + sha256 verified after transfer). The speculative drafter
and its fetcher are unchanged.

Shape: --sessions 4 --context 163840 with unquantized KV. gufo exposes no KV
quantization lever (execution_policy.hpp pins kv_cache_storage to kFp16), so
f16 is inherent.

KV arithmetic: f16 KV = 64 KiB/token (16 full-attention layers x 4 KV heads x
256 head_dim x 2 x 2B; the other 48 layers are linear-attention with a
per-sequence fp32 state). 4 x 163840 = 655,360 tokens = 40.0 GiB KV, each
session exactly 10 GiB. Budget ~62 GiB of the 114 GiB GTT.

Seam retargeted (FETCH -> the q4 script, TARGET_STUB, context/sessions pins).

tests/frank_large_unit.bats

@@ -19,13 +19,13 @@ load helpers
 ENV_FILE="$REPO_ROOT/scripts/frank-large.env"
 UNIT="$REPO_ROOT/scripts/frank-large.service"
 SERVE="$REPO_ROOT/scripts/serve-frank-large.sh"
-FETCH="$REPO_ROOT/scripts/download-frank-large-swift.sh"
+FETCH="$REPO_ROOT/scripts/download-frank-large-q4.sh"
 DRAFTER_FETCH="$REPO_ROOT/scripts/download-frank-large.sh"
 BUILD="$REPO_ROOT/scripts/build-gufo.sh"
 REMOTE_DEPLOY="$REPO_ROOT/scripts/deploy-remote.sh"
 # The deployed target's filename, kept here so a rename in the env file and a
 # rename in this stub cannot drift apart unnoticed.
-TARGET_STUB="Swift-1.5-Qwen3.8-27B-Uncensored-Dynamic-MTP-UD-Q8_K_XL.gguf"
+TARGET_STUB="Qwen3.8-27B-UD-Q4_K_XL.gguf"
 setup() {
     STAGE="$(mktemp -d)"
     RUNTIME_DIR="$STAGE/gufo"
@@ -144,8 +144,10 @@ argv_value() {
     [ "$(argv_value --served-model-name)" = "frank-large" ]
     [ "$(argv_value --host)" = "0.0.0.0" ]
     [ "$(argv_value --port)" = "7770" ]
-    [ "$(argv_value --context)" -eq 262144 ]
-    [ "$(argv_value --sessions)" -eq 1 ]
+    # 2026-10-01: four sessions x 163840 context (Frank's "4x 160k"), f16 KV.
+    # 163840 tokens x 64 KiB/token = 10 GiB of KV per session exactly.
+    [ "$(argv_value --context)" -eq 163840 ]
+    [ "$(argv_value --sessions)" -eq 4 ]
     [ "$(argv_value --speculative)" = "dflash2" ]
     [ "$(argv_value --draft-tokens)" -gt 0 ]
     [ "$(argv_value --draft-policy)" = "adaptive" ]
@@ -222,7 +224,7 @@ argv_value() {
     # so a plain grep stayed green after the URL was repointed at another
     # repository -- the script would then download something the serve script
     # never asked for.
-    grep -qE '^URL="https://huggingface\.co/ajgazin/Swift-1\.5-Qwen3\.8-27B-Uncensored-Dynamic-MTP-GGUF/resolve/main/' "$FETCH"
+    grep -qE '^URL="https://huggingface\.co/unsloth/Qwen3\.8-27B-GGUF/resolve/main/' "$FETCH"
     grep -qE 'https://huggingface\.co/z-lab/Qwen3\.8-27B-DFlash2-GGUF/resolve/main/' "$DRAFTER_FETCH"
     for f in "$FETCH" "$DRAFTER_FETCH"; do
         # -f so an HTTP error is a failure rather than a small "artifact";
@@ -252,9 +254,10 @@ argv_value() {
 }
 
 @test "the drafter is still fetched by the script that carries its Hub repo" {
-    # Guards a future "simplification" that folds the drafter into the Swift
-    # script and silently orphans the artifact the serve script still points
-    # at via DRAFTER_DIR.
+    # Guards a future "simplification" that folds the drafter into the
+    # payload-fetch script and silently orphans the artifact the serve script
+    # still points at via DRAFTER_DIR. The literal drafter name must not
+    # appear in that script AT ALL, comments included.
     grep -q 'Qwen3.8-27B-UD-Q8_K_XL' "$DRAFTER_FETCH"
     ! grep -q 'DFlash2' "$FETCH"
 }