feat: make web search a built-in tool

agent/protocol/agent.py

@@ -99,19 +99,24 @@ class Agent:
     def get_full_system_prompt(self, skill_filter=None) -> str:
         """
         Get the full system prompt including skills.
-        
+
         Note: Skills are now built into the system prompt by PromptBuilder,
         so we just return the base prompt directly. This method is kept for
         backward compatibility.
-        
+
         :param skill_filter: Optional list of skill names to include (deprecated)
         :return: Complete system prompt
         """
-        # Skills are now included in system_prompt by PromptBuilder
+        prompt = self.system_prompt
+
+        # Rebuild tool list section to reflect current self.tools
+        prompt = self._rebuild_tool_list_section(prompt)
+
         # If runtime_info contains dynamic time function, rebuild runtime section
         if self.runtime_info and callable(self.runtime_info.get('_get_current_time')):
-            return self._rebuild_runtime_section(self.system_prompt)
-        return self.system_prompt
+            prompt = self._rebuild_runtime_section(prompt)
+
+        return prompt
     
     def _rebuild_runtime_section(self, prompt: str) -> str:
         """
@@ -161,7 +166,31 @@ class Agent:
         except Exception as e:
             logger.warning(f"Failed to rebuild runtime section: {e}")
             return prompt
-    
+
+    def _rebuild_tool_list_section(self, prompt: str) -> str:
+        """
+        Rebuild the tool list inside the '## 工具系统' section so that it
+        always reflects the current ``self.tools`` (handles dynamic add/remove
+        of conditional tools like web_search).
+        """
+        import re
+        from agent.prompt.builder import _build_tooling_section
+
+        try:
+            if not self.tools:
+                return prompt
+
+            new_lines = _build_tooling_section(self.tools, "zh")
+            new_section = "\n".join(new_lines).rstrip("\n")
+
+            # Replace existing tooling section
+            pattern = r'## 工具系统\s*\n.*?(?=\n## |\Z)'
+            updated = re.sub(pattern, new_section, prompt, count=1, flags=re.DOTALL)
+            return updated
+        except Exception as e:
+            logger.warning(f"Failed to rebuild tool list section: {e}")
+            return prompt
+
     def refresh_skills(self):
         """Refresh the loaded skills."""
         if self.skill_manager:

agent/tools/__init__.py

@@ -45,16 +45,25 @@ def _import_optional_tools():
         )
     except Exception as e:
         logger.error(f"[Tools] Scheduler tool failed to load: {e}")
-    
-    
+
+    # WebSearch Tool (conditionally loaded based on API key availability at init time)
+    try:
+        from agent.tools.web_search.web_search import WebSearch
+        tools['WebSearch'] = WebSearch
+    except ImportError as e:
+        logger.error(f"[Tools] WebSearch not loaded - missing dependency: {e}")
+    except Exception as e:
+        logger.error(f"[Tools] WebSearch failed to load: {e}")
+
     return tools
 
 # Load optional tools
 _optional_tools = _import_optional_tools()
 EnvConfig = _optional_tools.get('EnvConfig')
 SchedulerTool = _optional_tools.get('SchedulerTool')
+WebSearch = _optional_tools.get('WebSearch')
 GoogleSearch = _optional_tools.get('GoogleSearch')
-FileSave = _optional_tools.get('FileSave') 
+FileSave = _optional_tools.get('FileSave')
 Terminal = _optional_tools.get('Terminal')
 
 
@@ -92,6 +101,7 @@ __all__ = [
     'MemoryGetTool',
     'EnvConfig',
     'SchedulerTool',
+    'WebSearch',
     # Optional tools (may be None if dependencies not available)
     # 'BrowserTool'
 ]

agent/tools/scheduler/scheduler_tool.py

@@ -20,7 +20,8 @@ class SchedulerTool(BaseTool):
     
     name: str = "scheduler"
     description: str = (
-        "创建、查询和管理定时任务。支持固定消息和AI任务两种类型。\n\n"
+        "创建、查询和管理定时任务（提醒、周期性任务等）。\n\n"
+        "⚠️ 重要：仅当需要「定时/提醒/每天/每周/X分钟后/X点」等延迟或周期执行时才使用此工具。"
         "使用方法：\n"
         "- 创建：action='create', name='任务名', message/ai_task='内容', schedule_type='once/interval/cron', schedule_value='...'\n"
         "- 查询：action='list' / action='get', task_id='任务ID'\n"
@@ -53,7 +54,7 @@ class SchedulerTool(BaseTool):
             },
             "ai_task": {
                 "type": "string",
-                "description": "AI任务描述 (与message二选一)，如'搜索今日新闻'、'查询天气'"
+                "description": "AI任务描述 (与message二选一)，用于定时让AI执行的任务"
             },
             "schedule_type": {
                 "type": "string",

agent/tools/web_search/__init__.py

@@ -0,0 +1,3 @@
+from agent.tools.web_search.web_search import WebSearch
+
+__all__ = ["WebSearch"]

agent/tools/web_search/web_search.py

@@ -0,0 +1,322 @@
+"""
+Web Search tool - Search the web using Bocha or LinkAI search API.
+Supports two backends with unified response format:
+  1. Bocha Search (primary, requires BOCHA_API_KEY)
+  2. LinkAI Search (fallback, requires LINKAI_API_KEY)
+"""
+
+import os
+import json
+from typing import Dict, Any, Optional
+
+import requests
+
+from agent.tools.base_tool import BaseTool, ToolResult
+from common.log import logger
+
+
+# Default timeout for API requests (seconds)
+DEFAULT_TIMEOUT = 30
+
+
+class WebSearch(BaseTool):
+    """Tool for searching the web using Bocha or LinkAI search API"""
+
+    name: str = "web_search"
+    description: str = (
+        "Search the web for current information, news, research topics, or any real-time data. "
+        "Returns web page titles, URLs, snippets, and optional summaries. "
+        "Use this when the user asks about recent events, needs fact-checking, or wants up-to-date information."
+    )
+
+    params: dict = {
+        "type": "object",
+        "properties": {
+            "query": {
+                "type": "string",
+                "description": "Search query string"
+            },
+            "count": {
+                "type": "integer",
+                "description": "Number of results to return (1-50, default: 10)"
+            },
+            "freshness": {
+                "type": "string",
+                "description": (
+                    "Time range filter. Options: "
+                    "'noLimit' (default), 'oneDay', 'oneWeek', 'oneMonth', 'oneYear', "
+                    "or date range like '2025-01-01..2025-02-01'"
+                )
+            },
+            "summary": {
+                "type": "boolean",
+                "description": "Whether to include text summary for each result (default: false)"
+            }
+        },
+        "required": ["query"]
+    }
+
+    def __init__(self, config: dict = None):
+        self.config = config or {}
+        self._backend = None  # Will be resolved on first execute
+
+    @staticmethod
+    def is_available() -> bool:
+        """Check if web search is available (at least one API key is configured)"""
+        return bool(os.environ.get("BOCHA_API_KEY") or os.environ.get("LINKAI_API_KEY"))
+
+    def _resolve_backend(self) -> Optional[str]:
+        """
+        Determine which search backend to use.
+        Priority: Bocha > LinkAI
+
+        :return: 'bocha', 'linkai', or None
+        """
+        if os.environ.get("BOCHA_API_KEY"):
+            return "bocha"
+        if os.environ.get("LINKAI_API_KEY"):
+            return "linkai"
+        return None
+
+    def execute(self, args: Dict[str, Any]) -> ToolResult:
+        """
+        Execute web search
+
+        :param args: Search parameters (query, count, freshness, summary)
+        :return: Search results
+        """
+        query = args.get("query", "").strip()
+        if not query:
+            return ToolResult.fail("Error: 'query' parameter is required")
+
+        count = args.get("count", 10)
+        freshness = args.get("freshness", "noLimit")
+        summary = args.get("summary", False)
+
+        # Validate count
+        if not isinstance(count, int) or count < 1 or count > 50:
+            count = 10
+
+        # Resolve backend
+        backend = self._resolve_backend()
+        if not backend:
+            return ToolResult.fail(
+                "Error: No search API key configured. "
+                "Please set BOCHA_API_KEY or LINKAI_API_KEY using env_config tool.\n"
+                "  - Bocha Search: https://open.bocha.cn\n"
+                "  - LinkAI Search: https://link-ai.tech"
+            )
+
+        try:
+            if backend == "bocha":
+                return self._search_bocha(query, count, freshness, summary)
+            else:
+                return self._search_linkai(query, count, freshness)
+        except requests.Timeout:
+            return ToolResult.fail(f"Error: Search request timed out after {DEFAULT_TIMEOUT}s")
+        except requests.ConnectionError:
+            return ToolResult.fail("Error: Failed to connect to search API")
+        except Exception as e:
+            logger.error(f"[WebSearch] Unexpected error: {e}", exc_info=True)
+            return ToolResult.fail(f"Error: Search failed - {str(e)}")
+
+    def _search_bocha(self, query: str, count: int, freshness: str, summary: bool) -> ToolResult:
+        """
+        Search using Bocha API
+
+        :param query: Search query
+        :param count: Number of results
+        :param freshness: Time range filter
+        :param summary: Whether to include summary
+        :return: Formatted search results
+        """
+        api_key = os.environ.get("BOCHA_API_KEY", "")
+        url = "https://api.bocha.cn/v1/web-search"
+
+        headers = {
+            "Authorization": f"Bearer {api_key}",
+            "Content-Type": "application/json",
+            "Accept": "application/json"
+        }
+
+        payload = {
+            "query": query,
+            "count": count,
+            "freshness": freshness,
+            "summary": summary
+        }
+
+        logger.debug(f"[WebSearch] Bocha search: query='{query}', count={count}")
+
+        response = requests.post(url, headers=headers, json=payload, timeout=DEFAULT_TIMEOUT)
+
+        if response.status_code == 401:
+            return ToolResult.fail("Error: Invalid BOCHA_API_KEY. Please check your API key.")
+        if response.status_code == 403:
+            return ToolResult.fail("Error: Bocha API - insufficient balance. Please top up at https://open.bocha.cn")
+        if response.status_code == 429:
+            return ToolResult.fail("Error: Bocha API rate limit reached. Please try again later.")
+        if response.status_code != 200:
+            return ToolResult.fail(f"Error: Bocha API returned HTTP {response.status_code}")
+
+        data = response.json()
+
+        # Check API-level error code
+        api_code = data.get("code")
+        if api_code is not None and api_code != 200:
+            msg = data.get("msg") or "Unknown error"
+            return ToolResult.fail(f"Error: Bocha API error (code={api_code}): {msg}")
+
+        # Extract and format results
+        return self._format_bocha_results(data, query)
+
+    def _format_bocha_results(self, data: dict, query: str) -> ToolResult:
+        """
+        Format Bocha API response into unified result structure
+
+        :param data: Raw API response
+        :param query: Original query
+        :return: Formatted ToolResult
+        """
+        search_data = data.get("data", {})
+        web_pages = search_data.get("webPages", {})
+        pages = web_pages.get("value", [])
+
+        if not pages:
+            return ToolResult.success({
+                "query": query,
+                "backend": "bocha",
+                "total": 0,
+                "results": [],
+                "message": "No results found"
+            })
+
+        results = []
+        for page in pages:
+            result = {
+                "title": page.get("name", ""),
+                "url": page.get("url", ""),
+                "snippet": page.get("snippet", ""),
+                "siteName": page.get("siteName", ""),
+                "datePublished": page.get("datePublished") or page.get("dateLastCrawled", ""),
+            }
+            # Include summary only if present
+            if page.get("summary"):
+                result["summary"] = page["summary"]
+            results.append(result)
+
+        total = web_pages.get("totalEstimatedMatches", len(results))
+
+        return ToolResult.success({
+            "query": query,
+            "backend": "bocha",
+            "total": total,
+            "count": len(results),
+            "results": results
+        })
+
+    def _search_linkai(self, query: str, count: int, freshness: str) -> ToolResult:
+        """
+        Search using LinkAI plugin API
+
+        :param query: Search query
+        :param count: Number of results
+        :param freshness: Time range filter
+        :return: Formatted search results
+        """
+        api_key = os.environ.get("LINKAI_API_KEY", "")
+        url = "https://api.link-ai.tech/v1/plugin/execute"
+
+        headers = {
+            "Content-Type": "application/json",
+            "Authorization": f"Bearer {api_key}"
+        }
+
+        payload = {
+            "code": "web-search",
+            "args": {
+                "query": query,
+                "count": count,
+                "freshness": freshness
+            }
+        }
+
+        logger.debug(f"[WebSearch] LinkAI search: query='{query}', count={count}")
+
+        response = requests.post(url, headers=headers, json=payload, timeout=DEFAULT_TIMEOUT)
+
+        if response.status_code == 401:
+            return ToolResult.fail("Error: Invalid LINKAI_API_KEY. Please check your API key.")
+        if response.status_code != 200:
+            return ToolResult.fail(f"Error: LinkAI API returned HTTP {response.status_code}")
+
+        data = response.json()
+
+        if not data.get("success"):
+            msg = data.get("message") or "Unknown error"
+            return ToolResult.fail(f"Error: LinkAI search failed: {msg}")
+
+        return self._format_linkai_results(data, query)
+
+    def _format_linkai_results(self, data: dict, query: str) -> ToolResult:
+        """
+        Format LinkAI API response into unified result structure.
+        LinkAI returns the search data in data.data field, which follows
+        the same Bing-compatible format as Bocha.
+
+        :param data: Raw API response
+        :param query: Original query
+        :return: Formatted ToolResult
+        """
+        raw_data = data.get("data", "")
+
+        # LinkAI may return data as a JSON string
+        if isinstance(raw_data, str):
+            try:
+                raw_data = json.loads(raw_data)
+            except (json.JSONDecodeError, TypeError):
+                # If data is plain text, return it as a single result
+                return ToolResult.success({
+                    "query": query,
+                    "backend": "linkai",
+                    "total": 1,
+                    "count": 1,
+                    "results": [{"content": raw_data}]
+                })
+
+        # If the response follows Bing-compatible structure
+        if isinstance(raw_data, dict):
+            web_pages = raw_data.get("webPages", {})
+            pages = web_pages.get("value", [])
+
+            if pages:
+                results = []
+                for page in pages:
+                    result = {
+                        "title": page.get("name", ""),
+                        "url": page.get("url", ""),
+                        "snippet": page.get("snippet", ""),
+                        "siteName": page.get("siteName", ""),
+                        "datePublished": page.get("datePublished") or page.get("dateLastCrawled", ""),
+                    }
+                    if page.get("summary"):
+                        result["summary"] = page["summary"]
+                    results.append(result)
+
+                total = web_pages.get("totalEstimatedMatches", len(results))
+                return ToolResult.success({
+                    "query": query,
+                    "backend": "linkai",
+                    "total": total,
+                    "count": len(results),
+                    "results": results
+                })
+
+        # Fallback: return raw data
+        return ToolResult.success({
+            "query": query,
+            "backend": "linkai",
+            "total": 1,
+            "count": 1,
+            "results": [{"content": str(raw_data)}]
+        })

bridge/agent_bridge.py

@@ -494,39 +494,70 @@ class AgentBridge:
     
     def refresh_all_skills(self) -> int:
         """
-        Refresh skills in all agent instances after environment variable changes.
-        This allows hot-reload of skills without restarting the agent.
-        
+        Refresh skills and conditional tools in all agent instances after
+        environment variable changes. This allows hot-reload without restarting.
+
         Returns:
             Number of agent instances refreshed
         """
         import os
         from dotenv import load_dotenv
         from config import conf
-        
+
         # Reload environment variables from .env file
         workspace_root = expand_path(conf().get("agent_workspace", "~/cow"))
         env_file = os.path.join(workspace_root, '.env')
-        
+
         if os.path.exists(env_file):
             load_dotenv(env_file, override=True)
             logger.info(f"[AgentBridge] Reloaded environment variables from {env_file}")
-        
+
         refreshed_count = 0
-        
-        # Refresh default agent
-        if self.default_agent and hasattr(self.default_agent, 'skill_manager'):
-            self.default_agent.skill_manager.refresh_skills()
-            refreshed_count += 1
-            logger.info("[AgentBridge] Refreshed skills in default agent")
-        
-        # Refresh all session agents
+
+        # Collect all agent instances to refresh
+        agents_to_refresh = []
+        if self.default_agent:
+            agents_to_refresh.append(("default", self.default_agent))
         for session_id, agent in self.agents.items():
-            if hasattr(agent, 'skill_manager'):
+            agents_to_refresh.append((session_id, agent))
+
+        for label, agent in agents_to_refresh:
+            # Refresh skills
+            if hasattr(agent, 'skill_manager') and agent.skill_manager:
                 agent.skill_manager.refresh_skills()
-                refreshed_count += 1
-        
+
+            # Refresh conditional tools (e.g. web_search depends on API keys)
+            self._refresh_conditional_tools(agent)
+
+            refreshed_count += 1
+
         if refreshed_count > 0:
-            logger.info(f"[AgentBridge] Refreshed skills in {refreshed_count} agent instance(s)")
-        
-        return refreshed_count
+            logger.info(f"[AgentBridge] Refreshed skills & tools in {refreshed_count} agent instance(s)")
+
+        return refreshed_count
+
+    @staticmethod
+    def _refresh_conditional_tools(agent):
+        """
+        Add or remove conditional tools based on current environment variables.
+        For example, web_search should only be present when BOCHA_API_KEY or
+        LINKAI_API_KEY is set.
+        """
+        try:
+            from agent.tools.web_search.web_search import WebSearch
+
+            has_tool = any(t.name == "web_search" for t in agent.tools)
+            available = WebSearch.is_available()
+
+            if available and not has_tool:
+                # API key was added - inject the tool
+                tool = WebSearch()
+                tool.model = agent.model
+                agent.tools.append(tool)
+                logger.info("[AgentBridge] web_search tool added (API key now available)")
+            elif not available and has_tool:
+                # API key was removed - remove the tool
+                agent.tools = [t for t in agent.tools if t.name != "web_search"]
+                logger.info("[AgentBridge] web_search tool removed (API key no longer available)")
+        except Exception as e:
+            logger.debug(f"[AgentBridge] Failed to refresh conditional tools: {e}")

bridge/agent_initializer.py

@@ -219,13 +219,20 @@ class AgentInitializer:
         
         for tool_name in tool_manager.tool_classes.keys():
             try:
+                # Skip web_search if no API key is available
+                if tool_name == "web_search":
+                    from agent.tools.web_search.web_search import WebSearch
+                    if not WebSearch.is_available():
+                        logger.debug("[AgentInitializer] WebSearch skipped - no BOCHA_API_KEY or LINKAI_API_KEY")
+                        continue
+
                 # Special handling for EnvConfig tool
                 if tool_name == "env_config":
                     from agent.tools import EnvConfig
                     tool = EnvConfig({"agent_bridge": self.agent_bridge})
                 else:
                     tool = tool_manager.create_tool(tool_name)
-                
+
                 if tool:
                     # Apply workspace config to file operation tools
                     if tool_name in ['read', 'write', 'edit', 'bash', 'grep', 'find', 'ls']: