Pin and verify Dirk model artifacts

experiments/dirk-qwen38/MODEL_ARTIFACTS.sha256

@@ -0,0 +1,2 @@
+d1ad2472a147caa1111bae5ec710331dc50692d62ebbdb3fbc54d421c4e209bc  Dirk-Qwen3.8-27B-UD-Q4_K_XL.gguf
+cbb841a9ee0636b2ec172f5bb8df2ea8dfeb01e90fe7c6126581d662a0b4e43e  mmproj-F16.gguf

experiments/dirk-qwen38/README.md

@@ -8,6 +8,7 @@ production router profile and never stops or restarts production services.
 
 - Main model: `Dirk-Qwen3.8-27B-UD-Q4_K_XL.gguf` (about 17.6 GB)
 - Vision projector: `mmproj-F16.gguf`
+- Pinned Hugging Face revision: `12362f2b3d7dc11044e99c9e7e99fb9f530528c0`
 - Runtime: existing `mike-ai/llama.cpp:local`
 - Test endpoint: `127.0.0.1:5004`
 - Results: `/data/benchmarks/dirk-qwen38/`
@@ -47,3 +48,5 @@ GPU memory, context recall, tool calling, code quality and total tokens needed
 to finish the task. Do not promote Dirk unless it matches the base model on
 technical correctness and improves real Hermes task completion.
 
+Expected SHA-256 checksums are stored in `MODEL_ARTIFACTS.sha256`.
+

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"
-