add plugin agent management tools

app/agent/tools/impl/_plugin_tool_utils.py

@@ -0,0 +1,73 @@
+"""插件 Agent 工具共享辅助方法"""
+
+import json
+from typing import Any, Optional
+
+from app.core.plugin import PluginManager
+
+# 默认只向智能体返回一个可读预览，避免超大插件数据挤爆上下文窗口。
+DEFAULT_PLUGIN_DATA_PREVIEW_CHARS = 12_000
+MAX_PLUGIN_DATA_PREVIEW_CHARS = 50_000
+PLUGIN_DATA_KEY_PREVIEW_LIMIT = 50
+PLUGIN_DATA_TRUNCATION_SUFFIX = "\n...(插件数据内容过长，已截断)"
+
+
+def get_plugin_snapshot(plugin_id: str) -> Optional[dict[str, Any]]:
+    """
+    获取已安装插件的基础信息快照。
+    """
+    plugin_manager = PluginManager()
+    for plugin in plugin_manager.get_local_plugins():
+        if plugin.id == plugin_id:
+            return {
+                "plugin_id": plugin.id,
+                "plugin_name": plugin.plugin_name,
+                "plugin_version": plugin.plugin_version,
+                "state": plugin.state,
+            }
+    return None
+
+
+def clamp_preview_chars(max_chars: Optional[int]) -> int:
+    """
+    约束插件数据预览长度，避免工具结果无限膨胀。
+    """
+    if max_chars is None:
+        return DEFAULT_PLUGIN_DATA_PREVIEW_CHARS
+    return max(512, min(int(max_chars), MAX_PLUGIN_DATA_PREVIEW_CHARS))
+
+
+def serialize_for_agent(value: Any) -> str:
+    """
+    将结果稳定序列化为 JSON 字符串，无法原生序列化的对象退化为字符串。
+    """
+    return json.dumps(value, ensure_ascii=False, indent=2, default=str)
+
+
+def build_preview_payload(value: Any, max_chars: Optional[int]) -> tuple[bool, int, int, str]:
+    """
+    为可能很大的插件数据生成预览结果。
+    """
+    serialized = serialize_for_agent(value)
+    if len(serialized) <= clamp_preview_chars(max_chars):
+        return False, len(serialized), len(serialized), serialized
+
+    preview_limit = clamp_preview_chars(max_chars)
+    preview = serialized[:preview_limit] + PLUGIN_DATA_TRUNCATION_SUFFIX
+    return True, len(serialized), len(preview), preview
+
+
+def reload_plugin_runtime(plugin_id: str) -> None:
+    """
+    重载插件并重新注册其命令、定时任务和 API。
+    """
+    # 这些依赖只在真正执行重载时才导入，避免普通查询工具引入不必要的初始化开销。
+    from app.api.endpoints.plugin import register_plugin_api
+    from app.command import Command
+    from app.scheduler import Scheduler
+
+    plugin_manager = PluginManager()
+    plugin_manager.reload_plugin(plugin_id)
+    Scheduler().update_plugin_job(plugin_id)
+    Command().init_commands(plugin_id)
+    register_plugin_api(plugin_id)