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src/Notifier/StellaOps.Notifier/StellaOps.Notifier.Worker/Escalation/EscalationServiceExtensions.cs

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+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace StellaOps.Notifier.Worker.Escalation;
+
+/// <summary>
+/// Extension methods for registering escalation services.
+/// </summary>
+public static class EscalationServiceExtensions
+{
+    /// <summary>
+    /// Adds escalation and on-call services.
+    /// </summary>
+    public static IServiceCollection AddEscalationServices(
+        this IServiceCollection services,
+        IConfiguration configuration)
+    {
+        // Core services
+        services.AddSingleton<IEscalationPolicyService, InMemoryEscalationPolicyService>();
+        services.AddSingleton<IOnCallScheduleService, InMemoryOnCallScheduleService>();
+        services.AddSingleton<IEscalationEngine, EscalationEngine>();
+
+        // Ack bridge
+        services.Configure<AckBridgeOptions>(configuration.GetSection(AckBridgeOptions.SectionName));
+        services.AddSingleton<IAckBridge, AckBridge>();
+
+        // Inbox channels
+        services.AddSingleton<InAppInboxChannel>();
+        services.AddSingleton<CliNotificationChannel>();
+        services.AddSingleton<IInboxChannel>(sp => sp.GetRequiredService<InAppInboxChannel>());
+
+        return services;
+    }
+
+    /// <summary>
+    /// Adds PagerDuty integration.
+    /// </summary>
+    public static IServiceCollection AddPagerDutyIntegration(
+        this IServiceCollection services,
+        IConfiguration configuration)
+    {
+        services.Configure<PagerDutyOptions>(configuration.GetSection(PagerDutyOptions.SectionName));
+        services.AddHttpClient<PagerDutyAdapter>();
+        services.AddSingleton<IExternalIntegrationAdapter, PagerDutyAdapter>(sp =>
+            sp.GetRequiredService<PagerDutyAdapter>());
+
+        return services;
+    }
+
+    /// <summary>
+    /// Adds OpsGenie integration.
+    /// </summary>
+    public static IServiceCollection AddOpsGenieIntegration(
+        this IServiceCollection services,
+        IConfiguration configuration)
+    {
+        services.Configure<OpsGenieOptions>(configuration.GetSection(OpsGenieOptions.SectionName));
+        services.AddHttpClient<OpsGenieAdapter>();
+        services.AddSingleton<IExternalIntegrationAdapter, OpsGenieAdapter>(sp =>
+            sp.GetRequiredService<OpsGenieAdapter>());
+
+        return services;
+    }
+}