feat: update install-skills.sh with --force --yes flags for non-interactive use

- Add -f/--force flag to overwrite existing skills without prompting
- Add -y/--yes flag to skip all existing skills
- Add -g/--global and -p/--project flags for install location
- Skip embedded git repos (cloned external skills) when detecting skills
- Remove interactive prompts in favor of flags

scripts/install-skills.sh

@@ -13,6 +13,34 @@ GLOBAL_SKILLS_DIR="${GLOBAL_DIR}/skills"
 UNIFIED_ENV="${GLOBAL_DIR}/.env"
 REPO_UNIFIED_ENV="${REPO_ROOT}/.env"
 
+# Args
+FORCE=0
+AUTO_YES=0
+INSTALL_GLOBAL=1
+
+usage() {
+    echo "Usage: $0 [OPTIONS]"
+    echo ""
+    echo "Options:"
+    echo "  -f, --force    Overwrite existing skills without prompting"
+    echo "  -y, --yes      Answer yes to all prompts"
+    echo "  -g, --global   Install to global ~/.config/opencode/skills (default)"
+    echo "  -p, --project  Install to project .opencode/skills"
+    echo "  -h, --help     Show this help message"
+    exit 0
+}
+
+while [ $# -gt 0 ]; do
+    case "$1" in
+        -f|--force) FORCE=1; shift ;;
+        -y|--yes) AUTO_YES=1; shift ;;
+        -g|--global) INSTALL_GLOBAL=1; shift ;;
+        -p|--project) INSTALL_GLOBAL=0; shift ;;
+        -h|--help) usage ;;
+        *) shift ;;
+    esac
+done
+
 # Colors
 INFO='\033[0;34m'
 SUCCESS='\033[0;32m'
@@ -32,6 +60,8 @@ get_skills() {
     for dir in "$SKILLS_DIR"/*/; do
         [ -d "$dir" ] || continue
         name=$(basename "$dir")
+        # Skip if it's an embedded git repo (like cloned external skills)
+        [ -d "$dir/.git" ] && continue
         [ -f "$dir/SKILL.md" ] && found="$found $name"
     done
     echo $found
@@ -212,18 +242,12 @@ main() {
     echo ""
     
     # Choose install location
-    line
-    print_info "Install location:"
-    echo "  1) Global (~/.config/opencode/skills)"
-    echo "  2) Project (./.opencode/skills)"
-    line
-    echo -n "Choice [1]: "
-    read choice
-    
-    if [ "$choice" = "2" ]; then
-        TARGET="${REPO_ROOT}/.opencode/skills"
-    else
+    if [ $INSTALL_GLOBAL -eq 1 ]; then
         TARGET="$GLOBAL_SKILLS_DIR"
+        print_info "Installing to global: $TARGET"
+    else
+        TARGET="${REPO_ROOT}/.opencode/skills"
+        print_info "Installing to project: $TARGET"
     fi
     
     mkdir -p "$TARGET"
@@ -236,10 +260,15 @@ main() {
         dest="${TARGET}/${skill}"
         
         if [ -d "$dest" ]; then
-            echo -n "$skill exists. Overwrite? [y/N]: "
-            read ow
-            if [ "$ow" != "y" ] && [ "$ow" != "Y" ]; then
-                print_warning "Skipped $skill"
+            if [ $FORCE -eq 0 ] && [ $AUTO_YES -eq 0 ]; then
+                echo -n "$skill exists. Overwrite? [y/N]: "
+                read ow
+                if [ "$ow" != "y" ] && [ "$ow" != "Y" ]; then
+                    print_warning "Skipped $skill"
+                    continue
+                fi
+            elif [ $AUTO_YES -eq 1 ]; then
+                print_info "Skipping $skill (existing)"
                 continue
             fi
             rm -rf "$dest"