Pin and verify Dirk model artifacts

experiments/dirk-qwen38/download-model.sh

@@ -2,7 +2,9 @@
 set -Eeuo pipefail
 
 MODEL_DIR=${MODEL_DIR:-/data/models/qwen3.8-27b-dirk}
-BASE_URL=https://huggingface.co/peculiar-ragdoll/Dirk-Qwen3.8-27B-GGUF/resolve/main
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REVISION=12362f2b3d7dc11044e99c9e7e99fb9f530528c0
+BASE_URL="https://huggingface.co/peculiar-ragdoll/Dirk-Qwen3.8-27B-GGUF/resolve/$REVISION"
 MODEL=Dirk-Qwen3.8-27B-UD-Q4_K_XL.gguf
 PROJECTOR=mmproj-F16.gguf
 
@@ -21,8 +23,8 @@ download() {
 
 (
   cd "$MODEL_DIR"
-  sha256sum "$MODEL" "$PROJECTOR" > SHA256SUMS
+  sha256sum -c "$SCRIPT_DIR/MODEL_ARTIFACTS.sha256"
+  cp "$SCRIPT_DIR/MODEL_ARTIFACTS.sha256" SHA256SUMS
 )
 
 printf 'Prepared model files in %s\n' "$MODEL_DIR"
-