A:初版

src/Sharp/Config/DependencyInjection/SystemConfigExtensions.cs

@@ -0,0 +1,45 @@
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
+
+namespace Config;
+
+public interface ISystemConfigAccessor
+{
+    SystemConfig Value { get; }
+}
+
+internal sealed class SystemConfigAccessor : ISystemConfigAccessor, IDisposable
+{
+    private readonly ConfigManager _cm;
+    private readonly IDisposable _subscription;
+    private SystemConfig _current;
+
+    public SystemConfigAccessor(ConfigManager cm)
+    {
+        _cm = cm;
+        _current = cm.Get<SystemConfig>(section: "System", validate: false);
+        _subscription = cm.OnReload(() =>
+        {
+            // Reload on change
+            _current = _cm.Get<SystemConfig>(section: "System", validate: false);
+        });
+    }
+
+    public SystemConfig Value => _current;
+
+    public void Dispose() => _subscription.Dispose();
+}
+
+public static class SystemConfigExtensions
+{
+    /// <summary>
+    /// Registers SystemConfig accessor backed by ConfigManager under the "System" section.
+    /// </summary>
+    public static IServiceCollection AddSystemConfig(this IServiceCollection services, ConfigManager cm)
+    {
+        services.TryAddSingleton(cm);
+        services.TryAddSingleton<ISystemConfigAccessor, SystemConfigAccessor>();
+        return services;
+    }
+}
+

src/Sharp/Config/SystemConfig.cs

@@ -0,0 +1,22 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Config;
+
+/// <summary>
+/// Global system-level configuration, shared across modules.
+/// </summary>
+public sealed class SystemConfig
+{
+    [Required]
+    [RegularExpression(@"^([0-9]{1,3}\.){3}[0-9]{1,3}$|^localhost$|^[a-zA-Z0-9_.-]+$")]
+    public string HTTPIp { get; set; } = "127.0.0.1";
+
+    [Range(1, 65535)]
+    public int HttpPort { get; set; } = 8080;
+
+    [Range(1, 600)]
+    public int TimeoutSeconds { get; set; } = 30;
+
+    public string Scheme { get; set; } = "http";
+}
+