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templates/stellaops-plugin-connector/MyConnectorOptionsValidator.cs

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+using Microsoft.Extensions.Options;
+using StellaOps.DependencyInjection.Validation;
+
+namespace StellaOps.Plugin.MyConnector;
+
+/// <summary>
+/// Validates <see cref="MyConnectorOptions"/> configuration.
+/// </summary>
+public sealed class MyConnectorOptionsValidator : OptionsValidatorBase<MyConnectorOptions>
+{
+    protected override string SectionPrefix => MyConnectorOptions.SectionName;
+
+    protected override void ValidateOptions(MyConnectorOptions options, ValidationContext context)
+    {
+        context
+            .RequireNotEmpty(options.BaseUrl, nameof(options.BaseUrl))
+            .RequirePositive(options.TimeoutSeconds, nameof(options.TimeoutSeconds))
+            .RequireInRange(options.MaxRetries, nameof(options.MaxRetries), 0, 10);
+
+        // Validate URL format
+        if (!string.IsNullOrWhiteSpace(options.BaseUrl) &&
+            !Uri.TryCreate(options.BaseUrl, UriKind.Absolute, out _))
+        {
+            context.AddError(nameof(options.BaseUrl), "must be a valid absolute URL.");
+        }
+    }
+}