diff --git a/Taskfile.yml b/Taskfile.yml
index 2c9229dad51..bf85db4656c 100644
--- a/Taskfile.yml
+++ b/Taskfile.yml
@@ -914,13 +914,31 @@ tasks:
       - |
         OPENAPI_SHA="$(tr -d '[:space:]' < "{{.ROOT_DIR}}/.codegen/_openapi_sha")"
         BUILD_DIR="$(mktemp -d "${TMPDIR:-/tmp}/databricks-cli-universe.XXXXXX")"
-        trap 'rm -rf -- "$BUILD_DIR"' EXIT HUP INT TERM
+        # go-task's embedded shell (mvdan.cc/sh) only accepts EXIT/ERR in trap,
+        # not signal names, so cleanup is on normal/errexit exit only.
+        trap 'rm -rf -- "$BUILD_DIR"' EXIT
 
         echo "Creating temporary Universe checkout at ${OPENAPI_SHA}..."
         git clone --quiet --shared --no-checkout "{{.UNIVERSE_DIR}}" "$BUILD_DIR/universe"
+
+        # `git clone --shared` does not carry over partial-clone/promisor config.
+        # If UNIVERSE_DIR is a blobless (filter=blob:none) clone, the shared
+        # object store lacks the file blobs the checkout below needs, and the
+        # temp clone has no promisor remote to fetch them on demand. Mirror the
+        # source's promisor config onto origin (pointed at the upstream remote)
+        # so missing blobs are lazily fetched during checkout. No-op for a full
+        # clone, where nothing is missing.
+        UNIVERSE_REMOTE="$(git -C "{{.UNIVERSE_DIR}}" remote get-url origin)"
+        UNIVERSE_FILTER="$(git -C "{{.UNIVERSE_DIR}}" config --get remote.origin.partialclonefilter || true)"
+        if [ -n "$UNIVERSE_FILTER" ]; then
+          git -C "$BUILD_DIR/universe" remote set-url origin "$UNIVERSE_REMOTE"
+          git -C "$BUILD_DIR/universe" config remote.origin.promisor true
+          git -C "$BUILD_DIR/universe" config remote.origin.partialclonefilter "$UNIVERSE_FILTER"
+          git -C "$BUILD_DIR/universe" config extensions.partialClone origin
+        fi
+
         if ! git -C "$BUILD_DIR/universe" cat-file -e "${OPENAPI_SHA}^{commit}" 2>/dev/null; then
           echo "Fetching the missing Universe commit from the upstream remote..."
-          UNIVERSE_REMOTE="$(git -C "{{.UNIVERSE_DIR}}" remote get-url origin)"
           git -C "$BUILD_DIR/universe" fetch --no-tags "$UNIVERSE_REMOTE" master
         fi
         git -C "$BUILD_DIR/universe" checkout --quiet --detach "$OPENAPI_SHA"