diff --git a/scripts/deploy_vllm_patches.sh b/scripts/deploy_vllm_patches.sh
new file mode 100755
index 0000000..44faf47
--- /dev/null
+++ b/scripts/deploy_vllm_patches.sh
@@ -0,0 +1,55 @@
+#!/bin/bash
+# Deploy modified vLLM Python files from third_party/ to site-packages.
+#
+# Usage: bash scripts/deploy_vllm_patches.sh [HOST]
+#   HOST: ssh alias (default: dash0). Use "local" for local deployment.
+#
+# This copies only the Python files we've modified — C extensions and
+# everything else come from the pip-installed vllm package.
+
+set -euo pipefail
+
+HOST="${1:-dash0}"
+PROJECT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+VLLM_SRC="$PROJECT_DIR/third_party/vllm/vllm"
+
+# Files modified relative to vllm/ package root
+PATCHED_FILES=(
+    "distributed/kv_transfer/kv_connector/v1/mooncake/mooncake_connector.py"
+    "distributed/kv_transfer/kv_connector/v1/mooncake/mooncake_utils.py"
+    "v1/core/sched/scheduler.py"
+)
+
+if [ "$HOST" = "local" ]; then
+    VENV_SITE=$("$PROJECT_DIR/.venv/bin/python" -c "import site; print(site.getsitepackages()[0])")
+    DST="$VENV_SITE/vllm"
+    echo "Deploying to local: $DST"
+    for f in "${PATCHED_FILES[@]}"; do
+        cp -v "$VLLM_SRC/$f" "$DST/$f"
+    done
+else
+    # Find site-packages on remote
+    VENV_SITE=$(ssh "$HOST" "~/agentic-kv/.venv/bin/python -c \"import site; print(site.getsitepackages()[0])\"")
+    DST="$VENV_SITE/vllm"
+    echo "Deploying to $HOST:$DST"
+    for f in "${PATCHED_FILES[@]}"; do
+        scp "$VLLM_SRC/$f" "$HOST:$DST/$f"
+    done
+fi
+
+echo "Deployed ${#PATCHED_FILES[@]} patched files."
+
+# Verify
+if [ "$HOST" = "local" ]; then
+    "$PROJECT_DIR/.venv/bin/python" -c "
+import vllm.distributed.kv_transfer.kv_connector.v1.mooncake.mooncake_utils as m
+print('mooncake_utils:', m.__file__)
+print('has estimate_hit:', hasattr(m.MooncakeBootstrapServer, 'estimate_hit'))
+"
+else
+    ssh "$HOST" "~/agentic-kv/.venv/bin/python -c \"
+import vllm.distributed.kv_transfer.kv_connector.v1.mooncake.mooncake_utils as m
+print('mooncake_utils:', m.__file__)
+print('has estimate_hit:', hasattr(m.MooncakeBootstrapServer, 'estimate_hit'))
+\""
+fi