MetalamaVsxDependencies: add 2026.1 product family

Mirrors the 2026.0 definition with UpstreamProductFamily set to V2026_0.Family
and the Metalama dependency pointing at MetalamaDependencies.V2026_1.Metalama.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: PostSharpAgent

src/PostSharp.Engineering.BuildTools/Dependencies/Definitions/MetalamaVsxDependencies.V2026_1.cs

@@ -0,0 +1,81 @@
+// Copyright (c) SharpCrafters s.r.o. See the LICENSE.md file in the root directory of this repository root for details.
+
+using JetBrains.Annotations;
+using PostSharp.Engineering.BuildTools.Build;
+using PostSharp.Engineering.BuildTools.ContinuousIntegration.Model;
+using PostSharp.Engineering.BuildTools.Dependencies.Model;
+using PostSharp.Engineering.BuildTools.Tools.TeamCity;
+using System;
+
+namespace PostSharp.Engineering.BuildTools.Dependencies.Definitions;
+
+public static partial class MetalamaVsxDependencies
+{
+    // ReSharper disable once InconsistentNaming
+
+    [PublicAPI]
+    public static class V2026_1
+    {
+        private class MetalamaVsxDependencyDefinition : DependencyDefinition
+        {
+            public MetalamaVsxDependencyDefinition(
+                string dependencyName,
+                VcsProvider vcsProvider,
+                MetalamaGitHubOrganization? organization,
+                bool isVersioned = true,
+                string? parentCiProjectId = null,
+                string? customCiProjectName = null,
+                string? customBranch = null,
+                string? customReleaseBranch = null,
+                string? customRepositoryName = null,
+                bool pullRequestRequiresStatusCheck = true,
+                string? vcsRootProjectId = null )
+                : base(
+                    Family,
+                    dependencyName,
+                    customBranch ?? $"develop/{Family.Version}",
+                    customReleaseBranch ?? $"release/{Family.Version}",
+                    MetalamaDependencies.CreateMetalamaVcsRepository(
+                        customRepositoryName ?? dependencyName,
+                        vcsProvider,
+                        organization,
+                        customBranch == null && customReleaseBranch == null
+                            ? null
+                            : $"DefaultBranch_{dependencyName.Replace( ".", "", StringComparison.Ordinal )}" ),
+                    TeamCityHelper.CreateConfiguration(
+                        parentCiProjectId == null
+                            ? TeamCityHelper.GetProjectId( dependencyName, _projectName, Family.Version )
+                            : TeamCityHelper.GetProjectIdWithParentProjectId( dependencyName, parentCiProjectId ),
+                        isVersioned,
+                        pullRequestRequiresStatusCheck: pullRequestRequiresStatusCheck,
+                        vcsRootProjectId: vcsRootProjectId ),
+                    isVersioned ) { }
+        }
+
+        public static ProductFamily Family { get; } = new( _projectName, "2026.1", DevelopmentDependencies.Family )
+        {
+            UpstreamProductFamily = V2026_0.Family
+
+            // DownstreamProductFamily = V2026_2.Family
+        };
+
+        public static DependencyDefinition MetalamaVsx { get; } =
+            new MetalamaVsxDependencyDefinition(
+                "Metalama.Vsx",
+                VcsProvider.GitHub,
+                MetalamaGitHubOrganization.Metalama )
+            {
+                PackagePatterns = ["Metalama.Repacked"],
+                Dependencies =
+                [
+                    DevelopmentDependencies.PostSharpEngineering,
+                    MetalamaDependencies.V2026_1.Metalama,
+                    PostSharpDependencies.V2026_0.PostSharp.ToDependency(
+                        new ConfigurationSpecific<BuildConfiguration>(
+                            BuildConfiguration.Release,
+                            BuildConfiguration.Release,
+                            BuildConfiguration.Release ) )
+                ]
+            };
+    }
+}