fix: restrict spec conflict check to directories only

compgen -G matches files and directories; a file like specs/001-notes.md
would false-positive the guardrail. Now iterates matches and checks -d
to ensure only directories trigger a conflict.

Author: daniel-graham

scripts/bash/create-new-feature.sh

@@ -275,11 +275,14 @@ FEATURE_NUM=$(printf "%03d" "$((10#$BRANCH_NUMBER))")
 # Reuses check_existing_branches, which fetches remotes and checks both
 # specs directories and all local/remote branches.
 if [ "$NUMBER_EXPLICIT" = true ]; then
-    # Check for conflict in spec directories
+    # Check for conflict in spec directories (directories only)
     SPEC_CONFLICT=false
-    if compgen -G "$SPECS_DIR/${FEATURE_NUM}-*" > /dev/null 2>&1; then
-        SPEC_CONFLICT=true
-    fi
+    while IFS= read -r spec_path; do
+        if [ -d "$spec_path" ]; then
+            SPEC_CONFLICT=true
+            break
+        fi
+    done < <(compgen -G "$SPECS_DIR/${FEATURE_NUM}-*" 2>/dev/null)
 
     # Check for conflict in git branches (local and remote)
     BRANCH_CONFLICT=false