49 lines
1.9 KiB
C#
49 lines
1.9 KiB
C#
using MAF1.Tools;
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using MAF1.Utils;
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using Microsoft.Agents.AI;
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using Microsoft.Extensions.AI;
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namespace MAF1.Agents.Weather;
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/// <summary>
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/// 「按城市查天气」Agent。真正的 HTTP 查询在 WeatherTools.GetWeather，模型只负责决定调几次工具并写成中文摘要。
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/// </summary>
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public static class WeatherAgent
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{
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/// <summary>创建带 GetWeather 工具的 Agent。instructions 要求每个城市都调工具，禁止编造气温。</summary>
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public static AIAgent Create(AgentFactory factory, WeatherTools weatherTools)
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{
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return factory.CreateAgent(
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name: "WeatherAgent",
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instructions:
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"""
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你负责查询天气。用户给出的每个城市都必须调用一次 GetWeather，不要编造天气。
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用中文汇总所有城市的天气。
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""",
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tools: [AIFunctionFactory.Create(weatherTools.GetWeather)]);
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}
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/// <summary>需要上游把 cities 连到本节点。空列表直接抛错，避免无意义地打 LLM。</summary>
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public static async Task<AgentStepResult> RunAsync(
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AIAgent agent,
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IReadOnlyDictionary<string, object?> inputs,
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CancellationToken cancellationToken = default)
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{
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List<string> cities = AgentInputs.ReadStringList(inputs, "cities");
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if (cities.Count == 0)
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{
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throw new InvalidOperationException("输入 cities 为空。请把上一节点的 cities 连到本节点的 cities。");
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}
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AgentResponse response = await agent.RunAsync(
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$"请查询这些城市的天气：{string.Join("、", cities)}",
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cancellationToken: cancellationToken);
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return new AgentStepResult
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{
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Message = response.Text,
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Inputs = new Dictionary<string, object?> { ["cities"] = cities },
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Outputs = new Dictionary<string, object?> { ["summary"] = response.Text },
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};
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}
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}
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