Add instructions for Nova to query RAG directly

The memory_search tool requires external API keys (OpenAI/Google/Voyage)
which are not configured. This documents that Nova should use the RAG
scripts directly via command line instead.

SKILL.md

@@ -18,6 +18,32 @@ This skill provides a complete RAG (Retrieval-Augmented Generation) system for O
 - 💾 Local ChromaDB storage (no API keys required)
 - 🚀 Automatic AI integration – retrieves context transparently
 
+## For Nova (AI Assistant) - How to Query RAG
+
+**IMPORTANT:** The `memory_search` tool in OpenClaw is a SEPARATE system that requires external API keys (OpenAI/Google/Voyage). Do NOT use it.
+
+**Use the RAG skill scripts directly:**
+
+```bash
+# Quick search (returns top 10 results)
+python3 ~/.openclaw/workspace/skills/rag-openclaw/rag_query.py "your search query"
+
+# Search with type filter
+python3 ~/.openclaw/workspace/skills/rag-openclaw/rag_query.py "SIP voip" --type session
+python3 ~/.openclaw/workspace/skills/rag-openclaw/rag_query.py "porkbun DNS" --type skill
+
+# Check what's indexed
+python3 ~/.openclaw/workspace/skills/rag-openclaw/rag_manage.py stats
+```
+
+**When to use RAG:**
+- Before answering questions about past work, decisions, or context
+- When the user says "remember when..." or "we set up..."
+- When you need to recall configurations, credentials, or setup details
+- Whendebugging - search for how similar issues were solved before
+
+The RAG uses local embeddings (all-MiniLM-L6-v2) and requires no external API keys.
+
 ## Installation
 
 ### Prerequisites