diff --git a/.github/actions/arcane-deploy/action.sh b/.github/actions/arcane-deploy/action.sh
index f6770bc..82d16b4 100755
--- a/.github/actions/arcane-deploy/action.sh
+++ b/.github/actions/arcane-deploy/action.sh
@@ -16,7 +16,6 @@ AUTO_SYNC="${INPUT_AUTO_SYNC:-true}"
 SYNC_INTERVAL="${INPUT_SYNC_INTERVAL:-5}"
 TRIGGER_SYNC="${INPUT_TRIGGER_SYNC:-true}"
 ENV_VARS="${INPUT_ENV_VARS:-}"
-SYNC_NAME_PREFIX="${INPUT_SYNC_NAME_PREFIX:-${GITHUB_REPOSITORY##*/}}"
 
 # [C1/C2] Mask secrets immediately, before any logging or API calls
 [[ -n "${API_KEY}" ]] && echo "::add-mask::${API_KEY}"
@@ -167,25 +166,18 @@ discover_compose_files() {
 
 # --- Sync Naming ---
 # Derive a sync name from a compose file path.
-# "stacks/myapp/compose.yml" -> "${prefix}-myapp"
-# "compose.yml" (root) -> "${prefix}"
+# "stacks/myapp/compose.yml" -> "myapp"
+# "compose.yml" (root) -> "root"
 sync_name_from_path() {
   local path="$1"
   local dir
   dir=$(dirname "${path}")
 
-  local name
   if [[ "${dir}" == "." ]]; then
-    name="${SYNC_NAME_PREFIX}"
+    echo "root"
   else
-    name=$(basename "${dir}")
-    # Avoid "prefix-prefix" when the directory name matches the prefix
-    if [[ "${name}" != "${SYNC_NAME_PREFIX}" ]]; then
-      name="${SYNC_NAME_PREFIX}-${name}"
-    fi
+    basename "${dir}"
   fi
-
-  echo "${name}"
 }
 
 # --- Repository Management ---
diff --git a/.github/actions/arcane-deploy/action.yml b/.github/actions/arcane-deploy/action.yml
index ddbd567..9f28358 100644
--- a/.github/actions/arcane-deploy/action.yml
+++ b/.github/actions/arcane-deploy/action.yml
@@ -72,11 +72,6 @@ inputs:
     required: false
     default: 'true'
 
-  sync-name-prefix:
-    description: 'Prefix for sync names in Arcane. Defaults to the GitHub repository name.'
-    required: false
-    default: ''
-
   # Workflow environment variables
   env-vars:
     description: 'Environment variables (KEY=VALUE per line) to export to the GitHub Actions runner via $GITHUB_ENV. These are available to subsequent workflow steps, NOT inside deployed containers. Values are automatically masked in logs.'
@@ -117,5 +112,4 @@ runs:
         INPUT_AUTO_SYNC: ${{ inputs.auto-sync }}
         INPUT_SYNC_INTERVAL: ${{ inputs.sync-interval }}
         INPUT_TRIGGER_SYNC: ${{ inputs.trigger-sync }}
-        INPUT_SYNC_NAME_PREFIX: ${{ inputs.sync-name-prefix }}
         INPUT_ENV_VARS: ${{ inputs.env-vars }}