diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..9b40524
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,22 @@
+name: "CI Full Run"
+on:
+  pull_request:
+    branches:
+      - main
+      - grok/*/*
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Test store
+        uses: ./
+        with:
+          action: "store"
+          storage-host: ""
+      - name: Test load
+        uses: ./
+        with:
+          action: "load"
+          storage-host: ""
diff --git a/action.yml b/action.yml
index 4abdc05..478a15d 100644
--- a/action.yml
+++ b/action.yml
@@ -5,13 +5,13 @@ inputs:
     description: "What to do (store or load)."
     required: true
   storage-host:
-    description: "Storage host in the format [user@]host; it must have password-free SSH key access. If not set, uses CI_STORAGE_HOST environment variable. Must not be empty eventually."
-    required: false
+    description: "Storage host in the format [user@]host; it must have password-free SSH key access."
+    required: true
   storage-dir:
-    description: "Storage directory on the remote host. If not set, uses CI_STORAGE_DIR environment variable. If still empty, uses the ci-storage tool default ~/ci-storage."
+    description: "Storage directory on the remote host. If not set, uses the ci-storage tool default ~/ci-storage."
     required: false
   storage-max-age-sec:
-    description: "Remove slots created earlier than this many seconds ago. If not set, uses CI_STORAGE_MAX_AGE_SEC environment variable. If still empty, uses the ci-storage tool default 4 hours."
+    description: "Remove slots created earlier than this many seconds ago. If not set, uses the ci-storage tool default 4 hours."
     required: false
   slot-id:
     description: 'Id of the slot to store to or load from; use "*" to load a random most recent slot. If empty, uses "$GITHUB_RUN_ID-$GITHUB_RUN_ATTEMPT" value.'
@@ -30,21 +30,14 @@ runs:
   using: "composite"
   steps:
     - name: Run ci-storage ${{ inputs.action }}
-      run: ci-storage \
-        --storage-host="$CI_STORAGE_HOST" \
-        --storage-dir="$CI_STORAGE_DIR" \
-        --storage-max-age-sec="$CI_STORAGE_MAX_AGE_SEC" \
-        --slot-id="$SLOT_ID" \
-        --local-dir="$LOCAL_DIR" \
-        --exclude="$EXCLUDE" \
-        $VERBOSE \
-        "${{ inputs.action }}"
+      run: >
+        ./ci-storage
+        --storage-host="${{ inputs.storage-host || '' }}"
+        --storage-dir="${{ inputs.storage-dir || '' }}"
+        --storage-max-age-sec="${{ inputs.storage-max-age-sec || '' }}"
+        --slot-id="${{ inputs.slot-id || format('{0}-{1}', env.GITHUB_RUN_ID, env.GITHUB_RUN_ATTEMPT) }}"
+        --local-dir="${{ inputs.local-dir || '.' }}"
+        --exclude="${{ inputs.exclude || '' }}"
+        ${{ inputs.verbose && '--verbose' || '' }}
+        ${{ inputs.action }}
       shell: bash
-      env:
-        CI_STORAGE_HOST: ${{ inputs.storage-host || env.CI_STORAGE_HOST || "" }}
-        CI_STORAGE_DIR: ${{ inputs.storage-dir || env.CI_STORAGE_DIR || "" }}
-        CI_STORAGE_MAX_AGE_SEC: ${{ inputs.storage-max-age-sec || env.CI_STORAGE_MAX_AGE_SEC || "" }}
-        SLOT_ID: ${{ inputs.slot-id || format("{0}-{1}", env.GITHUB_RUN_ID, env.GITHUB_RUN_ATTEMPT) }}
-        LOCAL_DIR: ${{ inputs.local-dir || "." }}
-        EXCLUDE: ${{ inputs.exclude || "" }}
-        VERBOSE: ${{ inputs.verbose && "--verbose" || "" }}