Add list-skills tool for Claude

- Shell script (not .md) that lists all skill names
- Shows paths like 'testing/test-driven-development'
- Helps Claude avoid useless skill searches
- Added to getting-started workflow

skills/getting-started/list-skills

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+# list-skills - Show all available skill names without descriptions
+# For Claude to quickly see what exists before searching
+
+set -euo pipefail
+
+# Detect if running from repo or installed location
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+if [[ "$SCRIPT_DIR" == *"/.claude/plugins/cache/"* ]]; then
+    # Installed as plugin
+    SKILLS_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
+else
+    # Running from repo
+    SKILLS_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
+fi
+
+# Find all SKILL.md files and extract their paths
+find "$SKILLS_DIR" -name "SKILL.md" -type f | \
+    sed "s|$SKILLS_DIR/||; s|/SKILL.md||" | \
+    sort
+
+exit 0