搜索工具调研与安装：neo-ddg-search已安装并集成到学习机制

- 创建search-tool-research.md：记录clawdhub搜索工具调研
- 安装neo-ddg-search：DuckDuckGo Web Search，免费无需API密钥
- 更新learning-notes.md：添加搜索工具学习和clawdhub使用
- 添加工具学习启发：开源优先、多工具备选、持续学习工具
- 更新今日指标：+1搜索工具、+2学习相关文档
- 承诺：使用neo-ddg-search支持自主学习和资料收集

skills/neo-ddg-search/.clawhub/origin.json

@@ -0,0 +1,7 @@
+{
+  "version": 1,
+  "registry": "https://clawhub.ai",
+  "slug": "neo-ddg-search",
+  "installedVersion": "1.0.0",
+  "installedAt": 1770604497785
+}

skills/neo-ddg-search/SKILL.md

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+---
+name: ddg-search
+description: Search the web using DuckDuckGo. Free, no API key required. Use when the user asks to search the web, look something up, find information online, research a topic, or when you need to find current information that isn't in your training data. Also use when web_search tool is unavailable or has no API key configured.
+---
+
+# DuckDuckGo Web Search
+
+Search the web via DuckDuckGo using the `ddgs` Python library. No API key needed.
+
+## Quick Usage
+
+```bash
+python3 skills/ddg-search/scripts/search.py "your search query" [count]
+```
+
+- `query` (required): Search terms
+- `count` (optional): Number of results, default 5, max 20
+
+## Output Format
+
+Each result includes:
+- **Title** — Page title
+- **URL** — Direct link
+- **Snippet** — Text excerpt
+
+## Examples
+
+```bash
+# Basic search
+python3 skills/ddg-search/scripts/search.py "latest AI news"
+
+# More results
+python3 skills/ddg-search/scripts/search.py "Python async tutorial" 10
+```
+
+## Follow-up
+
+After searching, use `web_fetch` to read full content from any result URL.
+
+## Dependencies
+
+- `ddgs` Python package (install: `pip install --break-system-packages ddgs`)
+
+## Limitations
+
+- Unofficial scraping — may break if DuckDuckGo changes their frontend
+- Rate limits possible under heavy use
+- English-biased results by default

skills/neo-ddg-search/_meta.json

@@ -0,0 +1,6 @@
+{
+  "ownerId": "kn7baf9nh73cfcjjh3hevsxq5580q992",
+  "slug": "neo-ddg-search",
+  "version": "1.0.0",
+  "publishedAt": 1770549957374
+}

skills/neo-ddg-search/scripts/search.py

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+#!/usr/bin/env python3
+"""DuckDuckGo web search. Usage: search.py "query" [count]"""
+import sys
+from ddgs import DDGS
+
+query = sys.argv[1] if len(sys.argv) > 1 else ""
+count = int(sys.argv[2]) if len(sys.argv) > 2 else 5
+
+if not query:
+    print("Usage: search.py 'query' [count]", file=sys.stderr)
+    sys.exit(1)
+
+try:
+    results = list(DDGS().text(query, max_results=count))
+    if not results:
+        print("No results found.")
+    for i, r in enumerate(results, 1):
+        print(f"\n[{i}] {r.get('title','')}")
+        print(f"    {r.get('href','')}")
+        print(f"    {r.get('body','')}")
+except Exception as e:
+    print(f"Error: {e}", file=sys.stderr)
+    sys.exit(1)