feat(search): add local brave mcp search skill

skills/brave-mcp-search/SKILL.md

@@ -0,0 +1,54 @@
+---
+name: brave-mcp-search
+description: Search the web via the local LAN Brave Search MCP service. Use when the user wants a Brave-backed search result set, a second opinion after SearXNG, or when SearXNG is weak/unavailable.
+metadata:
+  openclaw:
+    requires:
+      bins: ["mcporter", "jq"]
+    emoji: "🦁"
+---
+
+# Brave MCP Search
+
+## Policy
+
+1. Prefer `searxng-local-search` first for normal web lookups.
+2. Use this Brave MCP skill when:
+   - the user explicitly asks for Brave,
+   - SearXNG is unavailable,
+   - or SearXNG results look weak and a second opinion would help.
+3. Label answers clearly as using **Brave MCP**.
+
+## Endpoint
+
+Default local endpoint:
+
+- `http://192.168.153.113:18802/mcp`
+
+You can override with `BRAVE_MCP_URL`.
+
+## Quick usage
+
+```bash
+scripts/search.sh "your query"
+```
+
+With options:
+
+```bash
+scripts/search.sh "your query" '{"country":"US","search_lang":"en","ui_lang":"en-US","count":8}'
+```
+
+Supported common options:
+- `country`
+- `search_lang`
+- `ui_lang`
+- `count`
+- `freshness`
+- `safesearch`
+
+## Notes
+
+- This uses the local Brave MCP service through `mcporter`.
+- It does not configure OpenClaw's built-in `web_search` provider.
+- Native `web_fetch` remains the preferred lightweight fetch tool for page reads.