feat: enhance skill validation with comprehensive checks
Enhanced validate-skills.sh to include: - Better error reporting with per-skill details - Validation of optional fields (license, metadata) - Check for version placement (must be under metadata) - Description quality checks (trigger phrases, related skills) - Improved frontmatter parsing for quoted/unquoted descriptions - File structure validation (optional directories) Currently: 22 passed, 3 warnings (missing related skills references) https://claude.ai/code/session_01DboBqyncsUPg5Z5qpLJx4x
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Claude
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1 changed files with 96 additions and 50 deletions
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@ -4,6 +4,7 @@
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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BLUE='\033[0;34m'
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NC='\033[0m' # No Color
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SKILLS_DIR="skills"
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@ -14,22 +15,27 @@ PASSED=0
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echo "🔍 Auditing Skills Against Agent Skills Specification"
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echo "======================================================"
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echo ""
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echo "Reference: https://agentskills.io/specification.md"
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echo ""
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# Validation rules from CLAUDE.md
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# name: 1-64 chars, lowercase a-z, numbers, hyphens only
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# REQUIRED: name, description
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# OPTIONAL: license, metadata
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# name: 1-64 chars, lowercase a-z, numbers, hyphens only, must match directory
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# description: 1-1024 chars with trigger phrases
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# SKILL.md: under 500 lines
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# Required fields: name, description
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# Optional dirs: references/, scripts/, assets/
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for skill_dir in "$SKILLS_DIR"/*/; do
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skill_name=$(basename "$skill_dir")
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skill_file="$skill_dir/SKILL.md"
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echo -n "📋 $skill_name: "
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skill_errors=()
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skill_warnings=()
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# Check if SKILL.md exists
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if [[ ! -f "$skill_file" ]]; then
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echo -e "${RED}❌ Missing SKILL.md${NC}"
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echo -e "${RED}❌ $skill_name${NC}"
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echo " Missing SKILL.md"
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((ISSUES++))
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continue
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fi
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@ -37,69 +43,109 @@ for skill_dir in "$SKILLS_DIR"/*/; do
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# Extract frontmatter
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frontmatter=$(sed -n '/^---$/,/^---$/p' "$skill_file" | head -n -1 | tail -n +2)
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# Check name field
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# Validate frontmatter exists
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if [[ -z "$frontmatter" ]]; then
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echo -e "${RED}❌ $skill_name${NC}"
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echo " Missing YAML frontmatter (---)"
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((ISSUES++))
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continue
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fi
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# ===== NAME VALIDATION =====
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name_in_file=$(echo "$frontmatter" | grep "^name:" | sed 's/^name: //' | tr -d ' ')
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if [[ -z "$name_in_file" ]]; then
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echo -e "${RED}❌ Missing name in frontmatter${NC}"
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((ISSUES++))
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continue
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skill_errors+=("Missing 'name' field in frontmatter")
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elif [[ "$name_in_file" != "$skill_name" ]]; then
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skill_errors+=("Name mismatch: directory='$skill_name' but frontmatter='$name_in_file'")
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elif ! [[ "$name_in_file" =~ ^[a-z0-9]([a-z0-9-]{0,62}[a-z0-9])?$ ]]; then
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skill_errors+=("Invalid name format: '$name_in_file' (must be lowercase, alphanumeric + hyphens only)")
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elif [[ ${#name_in_file} -lt 1 || ${#name_in_file} -gt 64 ]]; then
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skill_errors+=("Name length invalid: ${#name_in_file} chars (must be 1-64)")
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fi
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# Check name matches directory
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if [[ "$name_in_file" != "$skill_name" ]]; then
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echo -e "${RED}❌ Name mismatch: dir='$skill_name' but frontmatter='$name_in_file'${NC}"
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((ISSUES++))
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continue
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# ===== DESCRIPTION VALIDATION =====
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# Handle both quoted and unquoted descriptions
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description=$(echo "$frontmatter" | grep "^description:" | head -1)
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if [[ $description == *'description: "'* ]]; then
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# Quoted description - extract between quotes
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description=$(echo "$description" | sed 's/^description: "//' | sed 's/"$//')
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else
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# Unquoted description
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description=$(echo "$description" | sed 's/^description: //')
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fi
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# Validate name format: lowercase, alphanumeric, hyphens only
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if ! [[ "$name_in_file" =~ ^[a-z0-9]([a-z0-9-]{0,62}[a-z0-9])?$ ]]; then
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echo -e "${RED}❌ Invalid name format: '$name_in_file'${NC}"
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((ISSUES++))
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continue
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fi
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# Check name length (1-64 chars)
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if [[ ${#name_in_file} -lt 1 || ${#name_in_file} -gt 64 ]]; then
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echo -e "${RED}❌ Name length invalid: ${#name_in_file} chars (must be 1-64)${NC}"
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((ISSUES++))
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continue
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fi
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# Extract description
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description=$(echo "$frontmatter" | grep "^description:" | sed 's/^description: //' | sed 's/^"//' | sed 's/"$//')
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if [[ -z "$description" ]]; then
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echo -e "${RED}❌ Missing description in frontmatter${NC}"
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((ISSUES++))
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continue
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skill_errors+=("Missing 'description' field in frontmatter")
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else
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desc_len=${#description}
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if [[ $desc_len -lt 1 || $desc_len -gt 1024 ]]; then
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skill_errors+=("Description length invalid: $desc_len chars (must be 1-1024)")
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fi
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# Check for trigger phrases (When, when to use, mentions, etc.)
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if ! echo "$description" | grep -qi "when\|mention\|use"; then
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skill_warnings+=("Description lacks clear trigger phrases ('when', 'mention', 'use')")
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fi
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# Check for related skills reference (scope boundaries)
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if ! echo "$description" | grep -qi "see\|for\|ref"; then
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skill_warnings+=("Description lacks related skills reference (e.g., 'For X, see Y')")
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fi
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fi
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# Check description length (1-1024 chars)
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desc_len=${#description}
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if [[ $desc_len -lt 1 || $desc_len -gt 1024 ]]; then
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echo -e "${RED}❌ Description length invalid: $desc_len chars (must be 1-1024)${NC}"
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((ISSUES++))
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continue
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# ===== OPTIONAL FIELDS VALIDATION =====
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license=$(echo "$frontmatter" | grep "^license:" | sed 's/^license: //' | tr -d ' ')
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if [[ -n "$license" && "$license" != "MIT" && "$license" != "Apache-2.0" && "$license" != "ISC" ]]; then
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skill_warnings+=("License '$license' is non-standard (default: MIT)")
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fi
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# Check for trigger phrases in description (at least "also use when" or similar)
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if ! echo "$description" | grep -qi "when\|also\|mention\|use"; then
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echo -e "${YELLOW}⚠️ Warning: Description lacks trigger phrases${NC}"
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((WARNINGS++))
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# Check metadata structure
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metadata=$(echo "$frontmatter" | grep -A 10 "^metadata:")
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if [[ -n "$metadata" ]]; then
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# If metadata exists, check for version placement
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if echo "$frontmatter" | grep -q "^version:"; then
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skill_errors+=("'version' is top-level (should be under 'metadata:')")
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fi
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# Could add more metadata validation here
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fi
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# Count lines in SKILL.md
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# ===== FILE STRUCTURE VALIDATION =====
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line_count=$(wc -l < "$skill_file")
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if [[ $line_count -gt 500 ]]; then
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echo -e "${YELLOW}⚠️ Warning: SKILL.md is $line_count lines (should be <500)${NC}"
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((WARNINGS++))
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skill_warnings+=("SKILL.md is $line_count lines (should be <500, move details to references/)")
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fi
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# All checks passed
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echo -e "${GREEN}✓ Valid${NC}"
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((PASSED++))
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# Check for optional directories
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for optdir in references scripts assets; do
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if [[ -d "$skill_dir/$optdir" ]]; then
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# Just note its presence - no validation required
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:
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fi
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done
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# ===== REPORT RESULTS =====
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if [[ ${#skill_errors[@]} -gt 0 ]]; then
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echo -e "${RED}❌ $skill_name${NC}"
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for error in "${skill_errors[@]}"; do
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echo -e " ${RED}Error:${NC} $error"
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done
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if [[ ${#skill_warnings[@]} -gt 0 ]]; then
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for warning in "${skill_warnings[@]}"; do
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echo -e " ${YELLOW}Warning:${NC} $warning"
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done
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fi
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((ISSUES++))
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elif [[ ${#skill_warnings[@]} -gt 0 ]]; then
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echo -e "${YELLOW}⚠️ $skill_name${NC}"
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for warning in "${skill_warnings[@]}"; do
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echo -e " ${YELLOW}Warning:${NC} $warning"
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done
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((WARNINGS++))
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else
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echo -e "${GREEN}✓ $skill_name${NC}"
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((PASSED++))
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fi
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done
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echo ""
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