diff --git a/MAF1.Core/Agents/AgentStepResult.cs b/MAF1.Core/Agents/AgentStepResult.cs
index 72a806a..ab11c7e 100644
--- a/MAF1.Core/Agents/AgentStepResult.cs
+++ b/MAF1.Core/Agents/AgentStepResult.cs
@@ -2,6 +2,10 @@ using System.Text.Json;
 
 namespace MAF1.Agents;
 
+/// <summary>
+/// 一次 Agent 执行的统一结果。网页编排器和进程外插件都用这套字段，方便画布把输出接到下一节点。
+/// Message 是给日志看的原文；Outputs 才是下游节点真正读取的端口数据。
+/// </summary>
 public sealed class AgentStepResult
 {
     public string Message { get; init; } = "";
@@ -9,8 +13,12 @@ public sealed class AgentStepResult
     public Dictionary<string, object?> Outputs { get; init; } = new(StringComparer.OrdinalIgnoreCase);
 }
 
+/// <summary>
+/// 从图 JSON / 插件 stdin 读入参。值可能是 string、数组，也可能是 System.Text.Json 反序列化后的 JsonElement。
+/// </summary>
 public static class AgentInputs
 {
+    /// <summary>按端口名读一个字符串；没有该键则返回 null。</summary>
     public static string? ReadString(IReadOnlyDictionary<string, object?> inputs, string key)
     {
         if (!inputs.TryGetValue(key, out object? value) || value is null)
@@ -26,6 +34,7 @@ public static class AgentInputs
         return value.ToString();
     }
 
+    /// <summary>读城市列表：支持 JSON 数组、["a","b"] 风格，或用顿号/逗号分隔的一串文字。</summary>
     public static List<string> ReadStringList(IReadOnlyDictionary<string, object?> inputs, string key)
     {
         if (!inputs.TryGetValue(key, out object? value) || value is null)
diff --git a/MAF1.Core/Agents/FileCity/CityExtraction.cs b/MAF1.Core/Agents/FileCity/CityExtraction.cs
index 097f2d1..916d0e8 100644
--- a/MAF1.Core/Agents/FileCity/CityExtraction.cs
+++ b/MAF1.Core/Agents/FileCity/CityExtraction.cs
@@ -2,6 +2,9 @@ using System.Text.Json.Serialization;
 
 namespace MAF1.Agents.FileCity;
 
+/// <summary>
+/// FileCity Agent 约定输出的 JSON 形状。hasValidCities 会驱动边条件，也会触发「缺城市时等人确认」。
+/// </summary>
 public sealed class CityExtraction
 {
     [JsonPropertyName("hasValidCities")]
diff --git a/MAF1.Core/Agents/FileCity/FileCityAgent.cs b/MAF1.Core/Agents/FileCity/FileCityAgent.cs
index b610454..5eb60ed 100644
--- a/MAF1.Core/Agents/FileCity/FileCityAgent.cs
+++ b/MAF1.Core/Agents/FileCity/FileCityAgent.cs
@@ -6,8 +6,13 @@ using Microsoft.Extensions.AI;
 
 namespace MAF1.Agents.FileCity;
 
+/// <summary>
+/// 「读文件抽城市」Agent。学习路径：Create 注册工具和系统提示 → RunAsync 调模型 → Parse 把模型文本收成结构化结果。
+/// CLI、网页系统节点、file-city 插件三处都调用同一套逻辑，避免各写一份 prompt。
+/// </summary>
 public static class FileCityAgent
 {
+    /// <summary>创建带 ReadTextFile 工具的聊天 Agent。模型必须先读文件，不能凭文件名猜内容。</summary>
     public static AIAgent Create(AgentFactory factory)
     {
         return factory.CreateAgent(
@@ -26,6 +31,7 @@ public static class FileCityAgent
             tools: [AIFunctionFactory.Create(FileTools.ReadTextFile)]);
     }
 
+    /// <summary>跑一轮：读 filePath 输入，把解析后的 cities / hasValidCities 放进 Outputs。</summary>
     public static async Task<AgentStepResult> RunAsync(
         AIAgent agent,
         IReadOnlyDictionary<string, object?> inputs,
@@ -50,6 +56,7 @@ public static class FileCityAgent
         };
     }
 
+    /// <summary>从模型原文里抠 JSON。模型偶尔会包 Markdown 代码块，所以先走 JsonText.UnwrapObject。</summary>
     public static CityExtraction Parse(string text)
     {
         try
diff --git a/MAF1.Core/Agents/Weather/WeatherAgent.cs b/MAF1.Core/Agents/Weather/WeatherAgent.cs
index 489d464..522bc47 100644
--- a/MAF1.Core/Agents/Weather/WeatherAgent.cs
+++ b/MAF1.Core/Agents/Weather/WeatherAgent.cs
@@ -5,8 +5,12 @@ using Microsoft.Extensions.AI;
 
 namespace MAF1.Agents.Weather;
 
+/// <summary>
+/// 「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。
+/// </summary>
 public static class WeatherAgent
 {
+    /// <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>
     public static AIAgent Create(AgentFactory factory, WeatherTools weatherTools)
     {
         return factory.CreateAgent(
@@ -19,6 +23,7 @@ public static class WeatherAgent
             tools: [AIFunctionFactory.Create(weatherTools.GetWeather)]);
     }
 
+    /// <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>
     public static async Task<AgentStepResult> RunAsync(
         AIAgent agent,
         IReadOnlyDictionary<string, object?> inputs,
diff --git a/MAF1.Core/Decisions/DecisionModels.cs b/MAF1.Core/Decisions/DecisionModels.cs
index 8bba520..9ef4f7b 100644
--- a/MAF1.Core/Decisions/DecisionModels.cs
+++ b/MAF1.Core/Decisions/DecisionModels.cs
@@ -2,6 +2,10 @@ using MAF1.Agents;
 
 namespace MAF1.Decisions;
 
+/// <summary>
+/// 工作流暂停时发给人或 UI 的确认请求。必须带 DefaultOptionId，超时就采用它。
+/// CLI 和 Web 共用这一套，避免两套文案分叉。
+/// </summary>
 public sealed class DecisionRequest
 {
     public string Id { get; set; } = "";
@@ -14,6 +18,7 @@ public sealed class DecisionRequest
     public DateTimeOffset Deadline { get; set; }
 }
 
+/// <summary>一个可选项。RequiresText=true 时前端会显示输入框（例如改填城市）。</summary>
 public sealed class DecisionOption
 {
     public string Id { get; set; } = "";
@@ -24,6 +29,7 @@ public sealed class DecisionOption
     public bool IsDefault { get; set; }
 }
 
+/// <summary>人的选择或超时结果。TimedOut=true 时一律按默认方案处理，忽略 Text。</summary>
 public sealed class DecisionAnswer
 {
     public string OptionId { get; set; } = "";
@@ -31,12 +37,14 @@ public sealed class DecisionAnswer
     public bool TimedOut { get; set; }
 }
 
+/// <summary>缺城市场景下的两个方案 id，前后端都硬编码这两个字符串。</summary>
 public static class DecisionOptionIds
 {
     public const string Stop = "stop";
     public const string QueryCities = "query-cities";
 }
 
+/// <summary>工厂：生成「没有读到城市」这一类确认。网页 runner 和 CLI executor 都调用 Create。</summary>
 public static class EmptyCityDecision
 {
     public static DecisionRequest Create(string nodeId, string? reason, int timeoutSeconds)
@@ -72,6 +80,7 @@ public static class EmptyCityDecision
         };
     }
 
+    /// <summary>用户选「改查其它城市」且解析出至少一个城市名时返回 true。</summary>
     public static bool TryContinueWithCities(DecisionAnswer answer, out List<string> cities)
     {
         cities = [];
diff --git a/MAF1.Core/PluginContract/PluginManifest.cs b/MAF1.Core/PluginContract/PluginManifest.cs
index 2592323..17be9b6 100644
--- a/MAF1.Core/PluginContract/PluginManifest.cs
+++ b/MAF1.Core/PluginContract/PluginManifest.cs
@@ -2,6 +2,10 @@ using System.Text.Json.Serialization;
 
 namespace MAF1.PluginContract;
 
+/// <summary>
+/// 每个插件目录里的 plugin.json。网页宿主扫描这个文件来画节点端口，不会加载插件 DLL。
+/// Id 会出现在画布节点的 Type 上。
+/// </summary>
 public sealed class PluginManifest
 {
     public string Id { get; set; } = "";
@@ -16,12 +20,14 @@ public sealed class PluginManifest
     public List<PluginPort> Outputs { get; set; } = [];
 }
 
+/// <summary>如何启动插件进程。Command 可以是相对插件目录的 exe，或 dotnet + dll。</summary>
 public sealed class PluginLaunch
 {
     public string Command { get; set; } = "";
     public List<string> Args { get; set; } = [];
 }
 
+/// <summary>画布上的一个输入或输出端口。Name 必须和代码里读写的字段一致。</summary>
 public sealed class PluginPort
 {
     public string Name { get; set; } = "";
@@ -30,6 +36,7 @@ public sealed class PluginPort
     public bool Required { get; set; }
 }
 
+/// <summary>插件声明「我需要哪种凭据」。宿主按 Type 注入，Key 不进流程图 JSON。</summary>
 public sealed class PluginCredentialNeed
 {
     public string Name { get; set; } = "";
@@ -38,6 +45,7 @@ public sealed class PluginCredentialNeed
     public string Description { get; set; } = "";
 }
 
+/// <summary>宿主写入插件 stdin 的整包请求：业务输入 + 凭据。</summary>
 public sealed class PluginRequest
 {
     public Dictionary<string, object?> Inputs { get; set; } = new(StringComparer.OrdinalIgnoreCase);
@@ -46,6 +54,7 @@ public sealed class PluginRequest
     public Dictionary<string, PluginCredentialPayload> Credentials { get; set; } = new(StringComparer.OrdinalIgnoreCase);
 }
 
+/// <summary>实际的 endpoint / apiKey / model。只在宿主→插件进程之间传递。</summary>
 public sealed class PluginCredentialPayload
 {
     public string Id { get; set; } = "";
@@ -56,6 +65,7 @@ public sealed class PluginCredentialPayload
     public Dictionary<string, string> Extra { get; set; } = new(StringComparer.OrdinalIgnoreCase);
 }
 
+/// <summary>插件 JSON 统一 camelCase，和网页前端字段名对齐。</summary>
 public static class PluginJson
 {
     public static readonly System.Text.Json.JsonSerializerOptions Options = new()
diff --git a/MAF1.Core/PluginContract/PluginStdio.cs b/MAF1.Core/PluginContract/PluginStdio.cs
index f8890e6..47ba2de 100644
--- a/MAF1.Core/PluginContract/PluginStdio.cs
+++ b/MAF1.Core/PluginContract/PluginStdio.cs
@@ -4,8 +4,13 @@ using Microsoft.Extensions.Configuration;
 
 namespace MAF1.PluginContract;
 
+/// <summary>
+/// 进程外插件的 stdio 协议：宿主把 PluginRequest JSON 写入 stdin，插件把输出 JSON 写到 stdout。
+/// 学习时对照 PluginProcessRunner：那边启动进程、写 stdin、读 stdout。
+/// </summary>
 public static class PluginStdio
 {
+    /// <summary>插件入口第一步：读完 stdin 再干活。宿主写完会关闭 stdin。</summary>
     public static async Task<PluginRequest> ReadRequestAsync(CancellationToken cancellationToken = default)
     {
         using Stream stdin = Console.OpenStandardInput();
@@ -20,6 +25,7 @@ public static class PluginStdio
         return request ?? new PluginRequest();
     }
 
+    /// <summary>把 Outputs 写成一行 JSON。不要往 stdout 打日志，日志请走 stderr。</summary>
     public static async Task WriteOutputsAsync(Dictionary<string, object?> outputs, CancellationToken cancellationToken = default)
     {
         string json = JsonSerializer.Serialize(outputs, PluginJson.Options);
@@ -27,6 +33,7 @@ public static class PluginStdio
         await Console.Out.FlushAsync(cancellationToken);
     }
 
+    /// <summary>把宿主注入的 LLM 凭据写进环境变量，这样 AgentFactory.Load 能读到 Key。</summary>
     public static void ApplyCredentialsToEnvironment(IReadOnlyDictionary<string, PluginCredentialPayload> credentials)
     {
         foreach (KeyValuePair<string, PluginCredentialPayload> pair in credentials)
@@ -49,6 +56,9 @@ public static class PluginStdio
         }
     }
 
+    /// <summary>
+    /// 插件自己读天气等配置时用。优先 MAF1_CONTENT_ROOT（宿主 exe 目录），否则向上找 appsettings.json。
+    /// </summary>
     public static IConfiguration LoadHostConfiguration()
     {
         string contentRoot = Environment.GetEnvironmentVariable("MAF1_CONTENT_ROOT");
diff --git a/MAF1.Core/Tools/FileTools.cs b/MAF1.Core/Tools/FileTools.cs
index f1e7403..ea57822 100644
--- a/MAF1.Core/Tools/FileTools.cs
+++ b/MAF1.Core/Tools/FileTools.cs
@@ -3,6 +3,10 @@ using System.Text;
 
 namespace MAF1.Tools;
 
+/// <summary>
+/// 给 LLM 调用的本地读文件工具。Description 属性会进工具 schema，模型据此决定何时调用。
+/// 路径解析会试当前目录、exe 目录、以及 MAF1_CONTENT_ROOT（插件进程由宿主注入）。
+/// </summary>
 public static class FileTools
 {
     [Description("Read the full UTF-8 text of a local file. Always call this before judging city names.")]
@@ -28,6 +32,7 @@ public static class FileTools
         return File.ReadAllText(resolved, Encoding.UTF8);
     }
 
+    /// <summary>相对路径时依次试 cwd、exe 目录、内容根、再往上两级父目录（适配 bin/Debug/netX）。</summary>
     private static string? Resolve(string path)
     {
         if (Path.IsPathRooted(path) && File.Exists(path))
diff --git a/MAF1.Core/Tools/WeatherOptions.cs b/MAF1.Core/Tools/WeatherOptions.cs
index 8fa4d37..5b18381 100644
--- a/MAF1.Core/Tools/WeatherOptions.cs
+++ b/MAF1.Core/Tools/WeatherOptions.cs
@@ -1,5 +1,6 @@
 namespace MAF1.Tools;
 
+/// <summary>对应 appsettings.json 的 Weather 段。CLI 和 Web 各自有一份配置文件。</summary>
 public sealed class WeatherOptions
 {
     public string Provider { get; set; } = "Wttr";
diff --git a/MAF1.Core/Tools/WeatherTools.cs b/MAF1.Core/Tools/WeatherTools.cs
index 9775b68..042b62f 100644
--- a/MAF1.Core/Tools/WeatherTools.cs
+++ b/MAF1.Core/Tools/WeatherTools.cs
@@ -4,6 +4,10 @@ using System.Text.Json;
 
 namespace MAF1.Tools;
 
+/// <summary>
+/// 天气 HTTP 实现。Agent 通过 GetWeather 间接调用这里，而不是自己拼 URL。
+/// Provider=Wttr 免费无需 Key；OpenWeather 需要 ApiKey。
+/// </summary>
 public sealed class WeatherTools(WeatherOptions options, HttpClient http)
 {
     [Description("Look up live weather for a city or location. Always call this instead of guessing.")]
@@ -82,6 +86,7 @@ public sealed class WeatherTools(WeatherOptions options, HttpClient http)
             : $"{name}：{description}，气温 {temp:0.#}°C，湿度 {humidity}%";
     }
 
+    /// <summary>把 appsettings 里的 URL 模板换成真实地址。城市名要做 Uri.EscapeDataString。</summary>
     private string Expand(string template, string location, string? apiKey)
     {
         return template
@@ -90,6 +95,7 @@ public sealed class WeatherTools(WeatherOptions options, HttpClient http)
             .Replace("{apiKey}", apiKey ?? "", StringComparison.OrdinalIgnoreCase);
     }
 
+    /// <summary>带超时和 User-Agent。部分天气站点会拒绝没有 UA 的请求。</summary>
     public static HttpClient CreateHttpClient()
     {
         HttpClient http = new() { Timeout = TimeSpan.FromSeconds(20) };
diff --git a/MAF1.Core/Utils/AgentFactory.cs b/MAF1.Core/Utils/AgentFactory.cs
index 446b5f0..bd948d1 100644
--- a/MAF1.Core/Utils/AgentFactory.cs
+++ b/MAF1.Core/Utils/AgentFactory.cs
@@ -8,6 +8,10 @@ using OpenAI.Chat;
 
 namespace MAF1.Utils;
 
+/// <summary>
+/// 创建聊天 Agent 的工厂。根据 Endpoint 判断走 Azure OpenAI 还是 OpenAI 兼容接口（DeepSeek 等）。
+/// 密钥优先级：appsettings Llm → 环境变量。浏览器永远拿不到 Key。
+/// </summary>
 public sealed class AgentFactory
 {
     private readonly ChatClient _chatClient;
@@ -48,11 +52,13 @@ public sealed class AgentFactory
             .GetChatClient(model);
     }
 
+    /// <summary>把 ChatClient 包成 Microsoft.Agents.AI 的 AIAgent，并挂上 tools。</summary>
     public AIAgent CreateAgent(string name, string instructions, IList<AITool>? tools = null)
     {
         return _chatClient.AsAIAgent(instructions: instructions, name: name, tools: tools);
     }
 
+    /// <summary>合并配置文件和环境变量。插件进程里环境变量通常由宿主写入。</summary>
     public static LlmOptions Load(IConfiguration config)
     {
         LlmOptions options = config.GetSection("Llm").Get<LlmOptions>() ?? new LlmOptions();
@@ -85,6 +91,7 @@ public sealed class AgentFactory
             || host.Contains("services.ai.azure.com", StringComparison.OrdinalIgnoreCase);
     }
 
+    /// <summary>OpenAI 兼容 API 要求 base URL 以 /v1 结尾，用户常只填到域名。</summary>
     private static Uri ToOpenAICompatibleEndpoint(string endpoint)
     {
         string trimmed = endpoint.TrimEnd('/');
diff --git a/MAF1.Core/Utils/JsonText.cs b/MAF1.Core/Utils/JsonText.cs
index 75a7e8d..6c66ee3 100644
--- a/MAF1.Core/Utils/JsonText.cs
+++ b/MAF1.Core/Utils/JsonText.cs
@@ -1,5 +1,8 @@
 namespace MAF1.Utils;
 
+/// <summary>
+/// 从模型回复里抽出 JSON 对象。模型常包 ```json ... ```，或在前后加说明文字。
+/// </summary>
 public static class JsonText
 {
     public static string UnwrapObject(string text)
diff --git a/MAF1.Core/Utils/LlmOptions.cs b/MAF1.Core/Utils/LlmOptions.cs
index 15e88a4..ed1d46c 100644
--- a/MAF1.Core/Utils/LlmOptions.cs
+++ b/MAF1.Core/Utils/LlmOptions.cs
@@ -1,5 +1,6 @@
 namespace MAF1.Utils;
 
+/// <summary>LLM 连接信息。不要把真实 ApiKey 提交进 git。</summary>
 public sealed class LlmOptions
 {
     public string ApiKey { get; set; } = "";
diff --git a/MAF1.Core/Utils/WindowsConsole.cs b/MAF1.Core/Utils/WindowsConsole.cs
index cd679c6..82a4c00 100644
--- a/MAF1.Core/Utils/WindowsConsole.cs
+++ b/MAF1.Core/Utils/WindowsConsole.cs
@@ -3,6 +3,9 @@ using System.Text;
 
 namespace MAF1.Utils;
 
+/// <summary>
+/// Windows 控制台默认代码页容易把中文打成乱码。启动时切到 UTF-8，并打开 VT 序列（彩色输出用）。
+/// </summary>
 public static class WindowsConsole
 {
     private const uint Utf8CodePage = 65001;
diff --git a/MAF1.Web/PluginHost/CredentialStore.cs b/MAF1.Web/PluginHost/CredentialStore.cs
index 4c593b4..0fc3f88 100644
--- a/MAF1.Web/PluginHost/CredentialStore.cs
+++ b/MAF1.Web/PluginHost/CredentialStore.cs
@@ -4,6 +4,7 @@ using Microsoft.Extensions.Configuration;
 
 namespace MAF1.Plugins;
 
+/// <summary>内存中的完整凭据。只给插件进程用，不要序列化给浏览器。</summary>
 public sealed class CredentialRecord
 {
     public string Id { get; init; } = "";
@@ -15,6 +16,7 @@ public sealed class CredentialRecord
     public Dictionary<string, string> Extra { get; init; } = new(StringComparer.OrdinalIgnoreCase);
 }
 
+/// <summary>GET /api/credentials 的形状：有没有 Key 用布尔值表示，不返回 Key 本身。</summary>
 public sealed class CredentialPublicView
 {
     public string Id { get; init; } = "";
@@ -25,6 +27,9 @@ public sealed class CredentialPublicView
     public bool HasApiKey { get; init; }
 }
 
+/// <summary>
+/// 从 Llm 段和 Credentials 段组装凭据。节点 config.credentialId 默认 llm-default。
+/// </summary>
 public sealed class CredentialStore
 {
     private readonly IConfiguration _config;
@@ -64,6 +69,7 @@ public sealed class CredentialStore
         }
     }
 
+    /// <summary>给前端的列表。Endpoint 目前未打码（学习项目）；ApiKey 绝不会出现在这里。</summary>
     public IReadOnlyList<CredentialPublicView> ListPublic()
         => _named.Values
             .OrderBy(item => item.Id, StringComparer.OrdinalIgnoreCase)
diff --git a/MAF1.Web/PluginHost/NodeCatalogService.cs b/MAF1.Web/PluginHost/NodeCatalogService.cs
index b1762d9..e5099b5 100644
--- a/MAF1.Web/PluginHost/NodeCatalogService.cs
+++ b/MAF1.Web/PluginHost/NodeCatalogService.cs
@@ -3,6 +3,7 @@ using MAF1.Web;
 
 namespace MAF1.Plugins;
 
+/// <summary>一次目录快照：系统节点 + 插件节点合并后的 Nodes 列表给画布用。</summary>
 public sealed class NodeCatalogSnapshot
 {
     public string PluginsRoot { get; init; } = "";
@@ -13,6 +14,7 @@ public sealed class NodeCatalogSnapshot
     public IReadOnlyList<LoadedPlugin> LoadedPlugins { get; init; } = [];
 }
 
+/// <summary>把扫描结果和 AgentCatalog 拼在一起。同名时插件覆盖系统实现。</summary>
 public sealed class NodeCatalogService(PluginScanner scanner)
 {
     public NodeCatalogSnapshot Load()
diff --git a/MAF1.Web/PluginHost/PluginOptions.cs b/MAF1.Web/PluginHost/PluginOptions.cs
index 9198598..231636f 100644
--- a/MAF1.Web/PluginHost/PluginOptions.cs
+++ b/MAF1.Web/PluginHost/PluginOptions.cs
@@ -2,6 +2,7 @@ using Microsoft.Extensions.Configuration;
 
 namespace MAF1.Plugins;
 
+/// <summary>Plugins:Directory 相对网页 exe，不是源码树里的 plugins/ 文件夹。</summary>
 public sealed class PluginOptions
 {
     public string Directory { get; set; } = "plugins";
@@ -21,6 +22,7 @@ public sealed class PluginOptions
         => config.GetSection("Plugins").Get<PluginOptions>() ?? new PluginOptions();
 }
 
+/// <summary>扫描成功后的一个插件：目录 + 已解析的 plugin.json。</summary>
 public sealed class LoadedPlugin
 {
     public required string FolderName { get; init; }
@@ -28,6 +30,7 @@ public sealed class LoadedPlugin
     public required PluginContract.PluginManifest Manifest { get; init; }
 }
 
+/// <summary>扫描问题，前端左侧「扫描说明」会显示。error 的插件不会进画布。</summary>
 public sealed class CatalogIssue
 {
     public string Level { get; init; } = "error";
diff --git a/MAF1.Web/PluginHost/PluginProcessRunner.cs b/MAF1.Web/PluginHost/PluginProcessRunner.cs
index 6f9ad07..aafcaef 100644
--- a/MAF1.Web/PluginHost/PluginProcessRunner.cs
+++ b/MAF1.Web/PluginHost/PluginProcessRunner.cs
@@ -6,6 +6,10 @@ using MAF1.Utils;
 
 namespace MAF1.Plugins;
 
+/// <summary>
+/// 启动子进程跑插件：stdin 写 PluginRequest，stdout 读输出 JSON，超时 Kill。
+/// 这是「进程外 Agent」的完整示例，对照 FileCityPlugin/Program.cs 一起看。
+/// </summary>
 public sealed class PluginProcessRunner(PluginOptions options, CredentialStore credentials)
 {
     public async Task<Dictionary<string, object?>> RunAsync(
@@ -97,6 +101,7 @@ public sealed class PluginProcessRunner(PluginOptions options, CredentialStore c
         return map;
     }
 
+    /// <summary>工作目录=插件文件夹；环境变量带上 OPENAI_* 和 MAF1_CONTENT_ROOT。</summary>
     private ProcessStartInfo CreateStartInfo(LoadedPlugin plugin, Dictionary<string, PluginCredentialPayload> payload)
     {
         string command = plugin.Manifest.Launch.Command;
diff --git a/MAF1.Web/PluginHost/PluginScanner.cs b/MAF1.Web/PluginHost/PluginScanner.cs
index 8fb331d..7aee669 100644
--- a/MAF1.Web/PluginHost/PluginScanner.cs
+++ b/MAF1.Web/PluginHost/PluginScanner.cs
@@ -3,6 +3,9 @@ using MAF1.PluginContract;
 
 namespace MAF1.Plugins;
 
+/// <summary>
+/// 扫描 exe 旁边的 plugins/*/plugin.json。源码目录 Plugins/ 不会被运行时直接读到，要先 build 复制到输出目录。
+/// </summary>
 public sealed class PluginScanner(PluginOptions options)
 {
     public PluginScanResult Scan()
diff --git a/MAF1.Web/Program.cs b/MAF1.Web/Program.cs
index fcc4125..2ab16ce 100644
--- a/MAF1.Web/Program.cs
+++ b/MAF1.Web/Program.cs
@@ -1,3 +1,5 @@
+// 网页入口：Minimal API + wwwroot 静态文件。浏览器只调 REST，不接触 API Key。
+// 学习顺序建议：/api/catalog → 画布 → POST /api/run → 若 needsDecision 再 POST /api/run/{id}/decide。
 using MAF1.Decisions;
 using MAF1.Utils;
 using MAF1.Web;
@@ -16,6 +18,7 @@ WebApplication app = builder.Build();
 app.UseDefaultFiles();
 app.UseStaticFiles();
 
+// 左侧节点列表：系统内置 + 扫描到的插件。
 app.MapGet("/api/catalog", (AgentRuntime runtime) =>
 {
     var snapshot = runtime.Catalog.Load();
@@ -28,14 +31,17 @@ app.MapGet("/api/catalog", (AgentRuntime runtime) =>
         issues = snapshot.Issues,
     };
 });
+// 给下拉框用的凭据列表（不含原始 Key）。
 app.MapGet("/api/credentials", (AgentRuntime runtime) => runtime.Credentials.ListPublic());
 app.MapGet("/api/status", (AgentRuntime runtime) => new
 {
     weatherProvider = runtime.WeatherProvider,
     pluginsRoot = runtime.PluginsRoot,
 });
+// 提交画布 JSON。可能一次跑完，也可能返回 status=needsDecision。
 app.MapPost("/api/run", (WorkflowGraph graph, AgentRuntime runtime, CancellationToken cancellationToken)
     => runtime.Runner.RunAsync(graph, cancellationToken));
+// 超时后前端轮询最终结果。
 app.MapGet("/api/run/{runId}", (string runId, AgentRuntime runtime) =>
 {
     WorkflowRunResult? result = runtime.Runner.Get(runId);
@@ -43,6 +49,7 @@ app.MapGet("/api/run/{runId}", (string runId, AgentRuntime runtime) =>
         ? Results.NotFound(new WorkflowRunResult { Ok = false, Status = WorkflowRunStatus.Failed, Error = "找不到这次运行。" })
         : Results.Ok(result);
 });
+// 用户点确认：optionId=stop 或 query-cities（可带 text 城市名）。
 app.MapPost("/api/run/{runId}/decide", (string runId, DecisionAnswer answer, AgentRuntime runtime, CancellationToken cancellationToken)
     => runtime.Runner.DecideAsync(runId, answer, cancellationToken));
 
diff --git a/MAF1.Web/Web/AgentCatalog.cs b/MAF1.Web/Web/AgentCatalog.cs
index 51cc007..b3aa123 100644
--- a/MAF1.Web/Web/AgentCatalog.cs
+++ b/MAF1.Web/Web/AgentCatalog.cs
@@ -2,6 +2,7 @@ using MAF1.PluginContract;
 
 namespace MAF1.Web;
 
+/// <summary>画布上一个端口的元数据，前端用来渲染圆点和检查器文案。</summary>
 public sealed class PortInfo
 {
     public string Name { get; init; } = "";
@@ -10,6 +11,9 @@ public sealed class PortInfo
     public bool Required { get; init; }
 }
 
+/// <summary>
+/// 一种可放到画布上的节点类型。Origin=system 走进程内 Handler；Origin=plugin 走独立进程。
+/// </summary>
 public sealed class AgentTypeInfo
 {
     public string Type { get; init; } = "";
@@ -30,6 +34,7 @@ public sealed class AgentTypeInfo
     public IReadOnlyList<PluginCredentialNeed> Credentials { get; init; } = [];
 }
 
+/// <summary>系统节点绑定到哪个 C# 实现。插件节点 Handler 保持 None。</summary>
 public enum SystemHandler
 {
     None = 0,
@@ -37,6 +42,9 @@ public enum SystemHandler
     Weather,
 }
 
+/// <summary>
+/// 写死在宿主里的两种系统节点。插件 id 若与 Type 冲突，运行时优先插件进程。
+/// </summary>
 public static class AgentCatalog
 {
     public static AgentTypeInfo? FindSystem(string type)
diff --git a/MAF1.Web/Web/AgentRuntime.cs b/MAF1.Web/Web/AgentRuntime.cs
index 2ab3d08..da7efd0 100644
--- a/MAF1.Web/Web/AgentRuntime.cs
+++ b/MAF1.Web/Web/AgentRuntime.cs
@@ -8,6 +8,10 @@ using Microsoft.Extensions.Configuration;
 
 namespace MAF1.Web;
 
+/// <summary>
+/// 网页进程的组合根：把 LLM、两个系统 Agent、插件扫描/启动子进程、图执行器绑在一起。
+/// ASP.NET 把它注册成 Singleton，一次请求里不要 new 第二份。
+/// </summary>
 public sealed class AgentRuntime
 {
     public AgentRuntime(IConfiguration config)
diff --git a/MAF1.Web/Web/ConfigurableWorkflowRunner.cs b/MAF1.Web/Web/ConfigurableWorkflowRunner.cs
index 2721ba3..ec38b6d 100644
--- a/MAF1.Web/Web/ConfigurableWorkflowRunner.cs
+++ b/MAF1.Web/Web/ConfigurableWorkflowRunner.cs
@@ -9,6 +9,11 @@ using Microsoft.Agents.AI;
 
 namespace MAF1.Web;
 
+/// <summary>
+/// 网页自己的图执行器（不是 Microsoft Agents AI Workflow）。
+/// 流程：拓扑排序 → 按边接线组装输入 → 跑系统节点或插件进程 → 若抽城市失败则暂停等人。
+/// 和 CLI 对照：这里用 DAG + when 条件，CLI 用 WorkflowBuilder 的 Executor 图。
+/// </summary>
 public sealed class ConfigurableWorkflowRunner(
     AIAgent fileCityAgent,
     AIAgent weatherAgent,
@@ -17,6 +22,7 @@ public sealed class ConfigurableWorkflowRunner(
     WorkflowRunStore runs,
     int decisionTimeoutSeconds)
 {
+    /// <summary>这些 config 键不是业务输入端口，接线时不要当 filePath 那样传给 Agent。</summary>
     private static readonly HashSet<string> ReservedConfigKeys = new(StringComparer.OrdinalIgnoreCase)
     {
         "credentialId",
@@ -24,6 +30,7 @@ public sealed class ConfigurableWorkflowRunner(
         "decisionTimeoutSeconds",
     };
 
+    /// <summary>开始一次运行。后面若暂停，用同一 runId 继续 DecideAsync。</summary>
     public async Task<WorkflowRunResult> RunAsync(WorkflowGraph graph, CancellationToken cancellationToken)
     {
         try
@@ -62,6 +69,7 @@ public sealed class ConfigurableWorkflowRunner(
         return await ResolveAsync(session, answer, cancellationToken, session.Pending?.Id);
     }
 
+    /// <summary>从 session.NextIndex 接着跑。条件不满足的节点记 Skipped，不调用 LLM。</summary>
     private async Task<WorkflowRunResult> ContinueAsync(WorkflowSession session, CancellationToken cancellationToken)
     {
         try
@@ -107,6 +115,7 @@ public sealed class ConfigurableWorkflowRunner(
         }
     }
 
+    /// <summary>返回 needsDecision，并在后台倒计时到点后按默认方案 ResolveAsync。</summary>
     private WorkflowRunResult PauseForEmptyCities(WorkflowSession session, WorkflowNode node, NodeRunLog log)
     {
         string? reason = ReadString(log.Outputs, "reason");
@@ -167,6 +176,7 @@ public sealed class ConfigurableWorkflowRunner(
         });
     }
 
+    /// <summary>把确认结果写回该节点的 outputs（例如改写 cities），然后继续后续节点。</summary>
     private async Task<WorkflowRunResult> ResolveAsync(
         WorkflowSession session,
         DecisionAnswer answer,
@@ -319,6 +329,7 @@ public sealed class ConfigurableWorkflowRunner(
             Steps = steps ?? [],
         };
 
+    /// <summary>节点输出了 hasValidCities=false，且后面还有节点时，默认要弹确认。config 可关。</summary>
     private static bool ShouldAskEmptyCities(WorkflowNode node, NodeRunLog log)
     {
         if (log.Skipped)
@@ -340,6 +351,7 @@ public sealed class ConfigurableWorkflowRunner(
         return !ReadBool(log.Outputs, "hasValidCities");
     }
 
+    /// <summary>插件 id 优先于系统节点。系统节点按 Handler 调 FileCityAgent / WeatherAgent。</summary>
     private async Task<NodeRunLog> RunNodeAsync(
         NodeCatalogSnapshot snapshot,
         WorkflowNode node,
@@ -439,6 +451,7 @@ public sealed class ConfigurableWorkflowRunner(
         }
     }
 
+    /// <summary>Kahn 算法拓扑排序。有环则无法确定执行顺序。</summary>
     private static List<string> TopologicalOrder(WorkflowGraph graph)
     {
         Dictionary<string, int> indegree = graph.Nodes.ToDictionary(n => n.Id, _ => 0);
@@ -473,6 +486,7 @@ public sealed class ConfigurableWorkflowRunner(
         return order;
     }
 
+    /// <summary>先填节点 Config，再用入边把上游输出端口覆盖到下游输入端口（连线优先）。</summary>
     private static Dictionary<string, object?> ResolveInputs(
         WorkflowGraph graph,
         WorkflowNode node,
@@ -505,6 +519,7 @@ public sealed class ConfigurableWorkflowRunner(
         return inputs;
     }
 
+    /// <summary>入边 When 不满足则跳过本节点。当前只实现 hasValidCities 这一类条件。</summary>
     private static bool PassEdgeConditions(
         WorkflowGraph graph,
         WorkflowNode node,
diff --git a/MAF1.Web/Web/WorkflowModels.cs b/MAF1.Web/Web/WorkflowModels.cs
index 67eb418..377c986 100644
--- a/MAF1.Web/Web/WorkflowModels.cs
+++ b/MAF1.Web/Web/WorkflowModels.cs
@@ -2,12 +2,14 @@ using MAF1.Decisions;
 
 namespace MAF1.Web;
 
+/// <summary>浏览器 POST /api/run 的图：节点 + 连线。和前端 state.nodes / state.edges 一一对应。</summary>
 public sealed class WorkflowGraph
 {
     public List<WorkflowNode> Nodes { get; set; } = [];
     public List<WorkflowEdge> Edges { get; set; } = [];
 }
 
+/// <summary>画布节点。Config 里可写 filePath、credentialId、decisionTimeoutSeconds 等固定输入。</summary>
 public sealed class WorkflowNode
 {
     public string Id { get; set; } = "";
@@ -18,6 +20,9 @@ public sealed class WorkflowNode
     public Dictionary<string, string> Config { get; set; } = new(StringComparer.OrdinalIgnoreCase);
 }
 
+/// <summary>
+/// 一条边：FromPort → ToPort 传数据。When 是运行条件（hasValidCities / !hasValidCities / 空=始终）。
+/// </summary>
 public sealed class WorkflowEdge
 {
     public string Id { get; set; } = "";
@@ -28,6 +33,7 @@ public sealed class WorkflowEdge
     public string? When { get; set; }
 }
 
+/// <summary>一次运行的状态机：completed / needsDecision / failed。</summary>
 public static class WorkflowRunStatus
 {
     public const string Completed = "completed";
@@ -35,6 +41,7 @@ public static class WorkflowRunStatus
     public const string Failed = "failed";
 }
 
+/// <summary>返回给前端的运行快照。暂停时带 Decision，方便弹出确认框。</summary>
 public sealed class WorkflowRunResult
 {
     public bool Ok { get; set; }
@@ -46,6 +53,7 @@ public sealed class WorkflowRunResult
     public List<NodeRunLog> Steps { get; set; } = [];
 }
 
+/// <summary>单个节点的执行日志，显示在页面底部「运行结果」。</summary>
 public sealed class NodeRunLog
 {
     public string NodeId { get; set; } = "";
diff --git a/MAF1.Web/Web/WorkflowRunStore.cs b/MAF1.Web/Web/WorkflowRunStore.cs
index 2b83ea6..c1326fe 100644
--- a/MAF1.Web/Web/WorkflowRunStore.cs
+++ b/MAF1.Web/Web/WorkflowRunStore.cs
@@ -4,6 +4,10 @@ using MAF1.Plugins;
 
 namespace MAF1.Web;
 
+/// <summary>
+/// 一次可暂停的运行。NextIndex 记住停在第几个节点；Pending 是当前确认请求。
+/// Mutex 防止「用户点击」和「超时自动确认」同时 Continue。
+/// </summary>
 internal sealed class WorkflowSession
 {
     public required string RunId { get; init; }
@@ -22,6 +26,7 @@ internal sealed class WorkflowSession
     public object Sync { get; } = new();
 }
 
+/// <summary>进程内运行字典。服务重启后 runId 会失效，学习项目不做持久化。</summary>
 public sealed class WorkflowRunStore
 {
     private readonly ConcurrentDictionary<string, WorkflowSession> _sessions = new(StringComparer.OrdinalIgnoreCase);
diff --git a/MAF1.Web/wwwroot/css/app.css b/MAF1.Web/wwwroot/css/app.css
index 14d0f62..6c622b3 100644
--- a/MAF1.Web/wwwroot/css/app.css
+++ b/MAF1.Web/wwwroot/css/app.css
@@ -1,3 +1,4 @@
+/* 编排器布局：顶栏、三栏（节点 / 画布 / 检查器）、底部日志、确认弹层。 */
 :root {
     --bg: #0f1419;
     --panel: #171e26;
diff --git a/MAF1.Web/wwwroot/index.html b/MAF1.Web/wwwroot/index.html
index 704ac62..22cb191 100644
--- a/MAF1.Web/wwwroot/index.html
+++ b/MAF1.Web/wwwroot/index.html
@@ -1,4 +1,5 @@
 <!DOCTYPE html>
+<!-- 单页编排器：左节点列表、中画布、右检查器、下日志。逻辑全在 /js/app.js。 -->
 <html lang="zh-CN">
 <head>
   <meta charset="UTF-8" />
@@ -37,6 +38,7 @@
     <h2>运行结果</h2>
     <pre id="log">尚未运行。</pre>
   </section>
+  <!-- 缺城市时的确认层，对应后端 status=needsDecision -->
   <div id="decisionModal" class="modal hidden" aria-hidden="true">
     <div class="dialog">
       <h2>需要你确认</h2>
diff --git a/MAF1.Web/wwwroot/js/app.js b/MAF1.Web/wwwroot/js/app.js
index b91114b..eaf9b36 100644
--- a/MAF1.Web/wwwroot/js/app.js
+++ b/MAF1.Web/wwwroot/js/app.js
@@ -1,3 +1,14 @@
+/**
+ * 可视化编排器前端（无框架）。
+ *
+ * 学习路径：
+ * 1. init → loadCatalog：拉系统节点和插件节点
+ * 2. 示例图 / 拖节点、点端口连线；图数据在 state.nodes / state.edges
+ * 3. runGraph POST /api/run；若 status=needsDecision 弹出确认框
+ * 4. 确认走 /api/run/{id}/decide；超时则 pollRun 等服务端自动采用默认方案
+ *
+ * selected / pending 只用于点击交互。发给后端的 JSON 不含 API Key，只有 credentialId。
+ */
 const state = {
     catalog: [],
     system: [],
@@ -44,6 +55,7 @@ function pickNode(list, inputName) {
     return (list || []).find((item) => item.inputs?.some((p) => p.name === inputName));
 }
 
+/** 生成「抽城市 → 有城市才查天气」的示例图。连线 when=hasValidCities。 */
 function exampleGraph() {
     const fileInfo = pickNode(state.system, "filePath") || pickNode(state.catalog, "filePath");
     const weatherInfo = pickNode(state.plugins, "cities") || pickNode(state.system, "cities") || pickNode(state.catalog, "cities");
@@ -110,6 +122,7 @@ function addNode(type) {
     render();
 }
 
+/** 根据 state 重画节点 DOM；连线是 SVG，在 drawWires。 */
 function render() {
     canvas.innerHTML = "";
     for (const node of state.nodes) {
@@ -172,6 +185,7 @@ function startDrag(e, node) {
     window.addEventListener("mouseup", up);
 }
 
+/** 先点输出端口记下 pending，再点输入端口生成一条边。 */
 function onPort(nodeId, port, dir) {
     if (dir === "out") {
         state.pending = { nodeId, port };
@@ -293,6 +307,7 @@ function renderInspector() {
     };
 }
 
+/** 把画布图交给后端。可能直接完成，也可能弹出 decisionModal。 */
 async function runGraph() {
     closeDecision();
     logEl.textContent = "运行中…";
@@ -379,6 +394,7 @@ function syncDecisionText() {
     }
 }
 
+/** 倒计时到 0 后去 GET 运行结果，因为服务端会自己按默认方案继续。 */
 function startDecisionTimer(deadline) {
     if (decisionTimer) {
         clearInterval(decisionTimer);
@@ -447,6 +463,7 @@ decisionSubmit.onclick = async () => {
     }
 };
 
+/** 拉节点目录和凭据列表，刷新左侧面板。 */
 async function loadCatalog() {
     const [catalog, credentials] = await Promise.all([
         (await fetch("/api/catalog")).json(),
diff --git a/MAF1/CliHost.cs b/MAF1/CliHost.cs
index da1c598..51c32b7 100644
--- a/MAF1/CliHost.cs
+++ b/MAF1/CliHost.cs
@@ -10,6 +10,10 @@ using Microsoft.Extensions.Configuration;
 
 namespace MAF1;
 
+/// <summary>
+/// 命令行宿主：读配置、创建两个 Agent、按 node/edge 选一张工作流图。
+/// node = 判断写在 CityGate 节点里；edge = 判断写在 AddEdge 的 condition 上。两条路缺城市时都会等人确认。
+/// </summary>
 internal static class CliHost
 {
     public static async Task RunAsync(string[] args)
@@ -39,6 +43,7 @@ internal static class CliHost
         Console.WriteLine($"决策等待: {decisionTimeoutSeconds} 秒（超时采用默认方案：结束查询）");
         Console.WriteLine();
 
+        // 同一套 Agent，两张不同的图。对比源码时重点看 CityWeatherWorkflow 里 AddEdge 的差异。
         Workflow workflow = mode == "edge"
             ? CityWeatherWorkflow.BuildEdgeCondition(fileCityAgent, weatherAgent, decisionTimeoutSeconds)
             : CityWeatherWorkflow.BuildNodeCondition(fileCityAgent, weatherAgent, decisionTimeoutSeconds);
@@ -48,6 +53,7 @@ internal static class CliHost
         await WorkflowOrchestration.RunAsync(workflow, label, filePath);
     }
 
+    /// <summary>无参数时默认 node + Data/cities.txt。--cli 是旧兼容前缀，可忽略。</summary>
     private static bool TryParseArgs(string[] args, out string mode, out string filePath)
     {
         mode = "node";
diff --git a/MAF1/Orchestration/ConsoleDecisionPrompt.cs b/MAF1/Orchestration/ConsoleDecisionPrompt.cs
index 22cac8a..3d4e27c 100644
--- a/MAF1/Orchestration/ConsoleDecisionPrompt.cs
+++ b/MAF1/Orchestration/ConsoleDecisionPrompt.cs
@@ -2,6 +2,10 @@ using MAF1.Decisions;
 
 namespace MAF1.Orchestration;
 
+/// <summary>
+/// CLI 版确认框。回车 / 1 = 结束查询；2 = 再输入城市；也可以直接打「成都」。
+/// ReadLine 和超时赛跑：到期返回 TimedOut，工作流走默认方案。
+/// </summary>
 internal static class ConsoleDecisionPrompt
 {
     public static async Task<DecisionAnswer> WaitAsync(DecisionRequest request)
@@ -70,6 +74,7 @@ internal static class ConsoleDecisionPrompt
         return new DecisionAnswer { OptionId = DecisionOptionIds.Stop };
     }
 
+    /// <summary>超时返回 null。注意：超时后后台的 ReadLine 仍可能阻塞，学习项目可接受。</summary>
     private static async Task<string?> ReadLineOrTimeoutAsync(DateTimeOffset deadline)
     {
         TimeSpan remain = deadline - DateTimeOffset.UtcNow;
diff --git a/MAF1/Orchestration/WorkflowOrchestration.cs b/MAF1/Orchestration/WorkflowOrchestration.cs
index 4ca434d..e9ddb34 100644
--- a/MAF1/Orchestration/WorkflowOrchestration.cs
+++ b/MAF1/Orchestration/WorkflowOrchestration.cs
@@ -4,6 +4,10 @@ using Microsoft.Agents.AI.Workflows;
 
 namespace MAF1.Orchestration;
 
+/// <summary>
+/// 把 Workflow 事件打到控制台。核心循环：WatchStreamAsync。
+/// 遇到 RequestInfoEvent 说明图在 RequestPort 上等人，这里弹出 ConsoleDecisionPrompt 再 SendResponseAsync。
+/// </summary>
 public static class WorkflowOrchestration
 {
     public static async Task RunAsync(Workflow workflow, string modeLabel, string filePath)
@@ -13,6 +17,7 @@ public static class WorkflowOrchestration
 
         string prompt = $"请读取这个文件并提取有效城市名：{filePath}";
         await using StreamingRun run = await InProcessExecution.RunStreamingAsync(workflow, prompt);
+        // TurnToken 通知 Agent Executor「可以开始一轮」；emitEvents 才会推送流式文本。
         await run.TrySendMessageAsync(new TurnToken(emitEvents: true));
 
         string? lastExecutorId = null;
@@ -21,6 +26,7 @@ public static class WorkflowOrchestration
             switch (evt)
             {
                 case RequestInfoEvent requestEvent:
+                    // 人机环：工作流挂起 → 控制台询问 → 把 DecisionAnswer 送回 RequestPort。
                     DecisionRequest decision = ReadDecision(requestEvent.Request);
                     DecisionAnswer answer = await ConsoleDecisionPrompt.WaitAsync(decision);
                     await run.SendResponseAsync(requestEvent.Request.CreateResponse(answer));
diff --git a/MAF1/Program.cs b/MAF1/Program.cs
index f0ce8ca..45da5f7 100644
--- a/MAF1/Program.cs
+++ b/MAF1/Program.cs
@@ -1,4 +1,6 @@
-using MAF1;
+// 控制台入口。学习时从这里开始：参数解析 → 组装 Agent → 跑 Microsoft Agents AI Workflow。
+// 可视化编排在另一个项目 MAF1.Web，本进程不听 HTTP。
+using MAF1;
 using MAF1.Utils;
 
 WindowsConsole.EnableUtf8();
diff --git a/MAF1/Workflows/AskCityDecisionExecutor.cs b/MAF1/Workflows/AskCityDecisionExecutor.cs
index 49ee289..9a6ece2 100644
--- a/MAF1/Workflows/AskCityDecisionExecutor.cs
+++ b/MAF1/Workflows/AskCityDecisionExecutor.cs
@@ -5,7 +5,7 @@ using Microsoft.Agents.AI.Workflows;
 namespace MAF1.Workflows;
 
 /// <summary>
-/// 边条件模式：没有城市时不在边上直接结束，而是发出决策请求。
+/// 边条件模式：没有城市时不在边上直接结束，而是发出 DecisionRequest，进入 RequestPort 等人。
 /// </summary>
 internal sealed class AskCityDecisionExecutor(int timeoutSeconds) : Executor<CityExtraction>("AskCityDecision")
 {
diff --git a/MAF1/Workflows/CityGateExecutor.cs b/MAF1/Workflows/CityGateExecutor.cs
index a9d8a8f..9a9542e 100644
--- a/MAF1/Workflows/CityGateExecutor.cs
+++ b/MAF1/Workflows/CityGateExecutor.cs
@@ -5,6 +5,10 @@ using Microsoft.Extensions.AI;
 
 namespace MAF1.Workflows;
 
+/// <summary>
+/// node 模式的闸门：解析 FileCity 文本，有城市就改写成查天气的用户消息；没有就发出确认请求。
+/// 判断发生在这个类内部，所以叫「条件写在节点里」。
+/// </summary>
 internal sealed class CityGateExecutor(int decisionTimeoutSeconds) : ChatProtocolExecutor(
     "CityGate",
     new ChatProtocolExecutorOptions { AutoSendTurnToken = false })
diff --git a/MAF1/Workflows/CityParseExecutor.cs b/MAF1/Workflows/CityParseExecutor.cs
index 5005b57..09f2bb4 100644
--- a/MAF1/Workflows/CityParseExecutor.cs
+++ b/MAF1/Workflows/CityParseExecutor.cs
@@ -5,7 +5,7 @@ using Microsoft.Extensions.AI;
 namespace MAF1.Workflows;
 
 /// <summary>
-/// 边条件模式：这里只解析，不做 if。走哪条边由 AddEdge 的 condition 决定。
+/// 边条件模式：这里只解析 FileCity 文本，不做 if。走哪条边由 AddEdge 的 condition 决定。
 /// </summary>
 internal sealed class CityParseExecutor() : ChatProtocolExecutor(
     "CityParse",
diff --git a/MAF1/Workflows/CityWeatherWorkflow.cs b/MAF1/Workflows/CityWeatherWorkflow.cs
index 2b736d6..6bb704e 100644
--- a/MAF1/Workflows/CityWeatherWorkflow.cs
+++ b/MAF1/Workflows/CityWeatherWorkflow.cs
@@ -5,8 +5,16 @@ using MAF1.Agents.FileCity;
 
 namespace MAF1.Workflows;
 
+/// <summary>
+/// 用 Microsoft.Agents.AI.Workflows 拼「抽城市 → 查天气」两张对照图。
+/// 建议对照 BuildNodeCondition / BuildEdgeCondition：前者 if 在 CityGate 里，后者 if 在边上。
+/// RequestPort 是官方的「向外要一次人工输入」端口，对应网页的 needsDecision。
+/// </summary>
 public static class CityWeatherWorkflow
 {
+    /// <summary>
+    /// 节点内判断：FileCity → CityGate。有城市则 Gate 直接催 Weather；没有则发 DecisionRequest。
+    /// </summary>
     public static Workflow BuildNodeCondition(AIAgent fileCityAgent, AIAgent weatherAgent, int decisionTimeoutSeconds)
     {
         (ExecutorBinding fileCity, ExecutorBinding weather) = BindAgents(fileCityAgent, weatherAgent);
@@ -27,6 +35,9 @@ public static class CityWeatherWorkflow
             .Build();
     }
 
+    /// <summary>
+    /// 边条件：Parse 之后两条边，condition 看 HasValidCities。没有城市走 Ask → RequestPort，而不是直接结束。
+    /// </summary>
     public static Workflow BuildEdgeCondition(AIAgent fileCityAgent, AIAgent weatherAgent, int decisionTimeoutSeconds)
     {
         (ExecutorBinding fileCity, ExecutorBinding weather) = BindAgents(fileCityAgent, weatherAgent);
@@ -49,6 +60,7 @@ public static class CityWeatherWorkflow
             .Build();
     }
 
+    /// <summary>把 AIAgent 嵌进 Workflow。ForwardIncomingMessages=false 避免把上游闲聊原样转给下游。</summary>
     private static (ExecutorBinding FileCity, ExecutorBinding Weather) BindAgents(AIAgent fileCityAgent, AIAgent weatherAgent)
     {
         AIAgentHostOptions agentOptions = new()
diff --git a/Plugins/file-city/Program.cs b/Plugins/file-city/Program.cs
index 3fe660e..bd933bc 100644
--- a/Plugins/file-city/Program.cs
+++ b/Plugins/file-city/Program.cs
@@ -1,3 +1,5 @@
+// 进程外 FileCity 插件。宿主启动本 exe，stdin 给 JSON，stdout 只回输出对象。
+// 业务逻辑全部复用 MAF1.Core 里的 FileCityAgent，这里只做协议适配。
 using MAF1.Agents.FileCity;
 using MAF1.PluginContract;
 using MAF1.Utils;
diff --git a/Plugins/weather/Program.cs b/Plugins/weather/Program.cs
index 009c736..bb3c97d 100644
--- a/Plugins/weather/Program.cs
+++ b/Plugins/weather/Program.cs
@@ -1,3 +1,4 @@
+// 进程外 Weather 插件。同样只做 stdio 适配，天气实现仍在 MAF1.Core。
 using MAF1.Agents.Weather;
 using MAF1.PluginContract;
 using MAF1.Tools;