diff --git a/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Transport/BundleNameMap.cs b/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Transport/BundleNameMap.cs
new file mode 100644
index 00000000..467962b9
--- /dev/null
+++ b/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Transport/BundleNameMap.cs
@@ -0,0 +1,53 @@
+namespace ZB.MOM.WW.ScadaBridge.Commons.Types.Transport;
+
+/// <summary>
+/// How a source-environment site or connection referenced by an incoming bundle is
+/// resolved against the destination environment during import.
+/// </summary>
+public enum MappingAction
+{
+    /// <summary>Bind the source name to an existing destination site/connection
+    /// (the corresponding <c>Target*</c> identifier is required).</summary>
+    MapToExisting,
+
+    /// <summary>Create a new destination site/connection from the bundle's payload
+    /// (the corresponding <c>Target*</c> identifier is left null).</summary>
+    CreateNew,
+}
+
+/// <summary>
+/// Resolves one site referenced by an incoming bundle (M8 site/instance-scoped
+/// transport). <paramref name="TargetSiteIdentifier"/> is required when
+/// <paramref name="Action"/> is <see cref="MappingAction.MapToExisting"/> and null
+/// when it is <see cref="MappingAction.CreateNew"/>.
+/// </summary>
+public sealed record SiteMapping(
+    string SourceSiteIdentifier,
+    MappingAction Action,
+    string? TargetSiteIdentifier);
+
+/// <summary>
+/// Resolves one data connection (scoped to a source site) referenced by an incoming
+/// bundle. <paramref name="TargetConnectionName"/> is required when
+/// <paramref name="Action"/> is <see cref="MappingAction.MapToExisting"/> and null
+/// when it is <see cref="MappingAction.CreateNew"/>.
+/// </summary>
+public sealed record ConnectionMapping(
+    string SourceSiteIdentifier,
+    string SourceConnectionName,
+    MappingAction Action,
+    string? TargetConnectionName);
+
+/// <summary>
+/// The operator-supplied resolution of every source-environment site and connection
+/// name an incoming bundle references, applied during import. Crosses the Central UI ⇆
+/// ManagementActor boundary via System.Text.Json.
+/// </summary>
+public sealed record BundleNameMap(
+    IReadOnlyList<SiteMapping> Sites,
+    IReadOnlyList<ConnectionMapping> Connections)
+{
+    /// <summary>An empty map (no site or connection mappings).</summary>
+    public static BundleNameMap Empty { get; } =
+        new(Array.Empty<SiteMapping>(), Array.Empty<ConnectionMapping>());
+}
diff --git a/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Transport/BundleSummary.cs b/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Transport/BundleSummary.cs
index 328a682e..5397980e 100644
--- a/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Transport/BundleSummary.cs
+++ b/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Transport/BundleSummary.cs
@@ -10,4 +10,9 @@ public sealed record BundleSummary(
     int DbConnections,
     int NotificationLists,
     int SmtpConfigs,
-    int ApiMethods);
+    int ApiMethods,
+    // Additive (M8 A1): site/instance-scoped artifacts. Defaulted to 0 so manifests
+    // written by older exporters (which omit these JSON properties) deserialize fine.
+    int Sites = 0,
+    int DataConnections = 0,
+    int Instances = 0);
diff --git a/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Transport/ExportSelection.cs b/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Transport/ExportSelection.cs
index b0d2d622..051e6413 100644
--- a/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Transport/ExportSelection.cs
+++ b/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Transport/ExportSelection.cs
@@ -13,4 +13,15 @@ public sealed record ExportSelection(
     IReadOnlyList<int> NotificationListIds,
     IReadOnlyList<int> SmtpConfigurationIds,
     IReadOnlyList<int> ApiMethodIds,
-    bool IncludeDependencies);
+    bool IncludeDependencies,
+    // Additive (M8 A1): site/instance-scoped export. Defaulted to empty so every
+    // existing positional caller keeps compiling; older callers select no sites/instances.
+    IReadOnlyList<int>? SiteIds = null,
+    IReadOnlyList<int>? InstanceIds = null)
+{
+    /// <summary>Sites selected for site/instance-scoped export (M8). Never null.</summary>
+    public IReadOnlyList<int> SiteIds { get; init; } = SiteIds ?? Array.Empty<int>();
+
+    /// <summary>Instances selected for site/instance-scoped export (M8). Never null.</summary>
+    public IReadOnlyList<int> InstanceIds { get; init; } = InstanceIds ?? Array.Empty<int>();
+}
diff --git a/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Transport/ImportPreview.cs b/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Transport/ImportPreview.cs
index 35914147..c0fa855b 100644
--- a/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Transport/ImportPreview.cs
+++ b/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Transport/ImportPreview.cs
@@ -11,6 +11,40 @@ public sealed record ImportPreviewItem(
     string? FieldDiffJson,
     string? BlockerReason);
 
+/// <summary>
+/// A site reference in an incoming bundle that the operator must resolve before import
+/// (M8 A1). <paramref name="AutoMatchTargetIdentifier"/> is the destination site the
+/// importer auto-matched by identifier, or null when no match was found.
+/// </summary>
+public sealed record RequiredSiteMapping(
+    string SourceSiteIdentifier,
+    string SourceSiteName,
+    string? AutoMatchTargetIdentifier);
+
+/// <summary>
+/// A connection reference (scoped to a source site) in an incoming bundle that the
+/// operator must resolve before import (M8 A1). <paramref name="AutoMatchTargetName"/>
+/// is the destination connection the importer auto-matched by name, or null when no
+/// match was found.
+/// </summary>
+public sealed record RequiredConnectionMapping(
+    string SourceSiteIdentifier,
+    string SourceConnectionName,
+    string? AutoMatchTargetName);
+
 public sealed record ImportPreview(
     Guid SessionId,
-    IReadOnlyList<ImportPreviewItem> Items);
+    IReadOnlyList<ImportPreviewItem> Items,
+    // Additive (M8 A1): site/connection references the operator must resolve before
+    // applying. Defaulted to empty so every existing positional caller keeps compiling.
+    IReadOnlyList<RequiredSiteMapping>? RequiredSiteMappings = null,
+    IReadOnlyList<RequiredConnectionMapping>? RequiredConnectionMappings = null)
+{
+    /// <summary>Site references the operator must resolve before import (M8). Never null.</summary>
+    public IReadOnlyList<RequiredSiteMapping> RequiredSiteMappings { get; init; } =
+        RequiredSiteMappings ?? Array.Empty<RequiredSiteMapping>();
+
+    /// <summary>Connection references the operator must resolve before import (M8). Never null.</summary>
+    public IReadOnlyList<RequiredConnectionMapping> RequiredConnectionMappings { get; init; } =
+        RequiredConnectionMappings ?? Array.Empty<RequiredConnectionMapping>();
+}
diff --git a/tests/ZB.MOM.WW.ScadaBridge.Commons.Tests/Types/Transport/BundleNameMapTests.cs b/tests/ZB.MOM.WW.ScadaBridge.Commons.Tests/Types/Transport/BundleNameMapTests.cs
new file mode 100644
index 00000000..ea12f9a9
--- /dev/null
+++ b/tests/ZB.MOM.WW.ScadaBridge.Commons.Tests/Types/Transport/BundleNameMapTests.cs
@@ -0,0 +1,127 @@
+using System.Text.Json;
+using ZB.MOM.WW.ScadaBridge.Commons.Types.Transport;
+
+namespace ZB.MOM.WW.ScadaBridge.Commons.Tests.Types.Transport;
+
+/// <summary>
+/// M8 A1: focused shape / value-equality / round-trip tests for the Transport (#24)
+/// name-mapping DTOs — <see cref="SiteMapping"/>, <see cref="ConnectionMapping"/>,
+/// and <see cref="BundleNameMap"/>. These records cross the Central UI ⇆ ManagementActor
+/// boundary (and may be persisted in an import session) via System.Text.Json, so a
+/// positional/tuple slip would silently mis-map sites/connections during import.
+/// Uses plain <see cref="JsonSerializer"/> (no dependency on the Transport project's
+/// BundleJsonOptions) per the A1 task contract.
+/// </summary>
+public sealed class BundleNameMapTests
+{
+    private static readonly JsonSerializerOptions JsonOpts = new(JsonSerializerDefaults.Web);
+
+    [Fact]
+    public void Empty_HasNoSitesOrConnections()
+    {
+        var map = BundleNameMap.Empty;
+
+        Assert.Empty(map.Sites);
+        Assert.Empty(map.Connections);
+    }
+
+    [Fact]
+    public void Empty_IsStableInstance()
+    {
+        // The Empty singleton must be reusable without aliasing surprises.
+        Assert.Same(BundleNameMap.Empty, BundleNameMap.Empty);
+    }
+
+    [Fact]
+    public void SiteMapping_ValueEquality_HoldsForIdenticalFields()
+    {
+        var a = new SiteMapping("site-east", MappingAction.MapToExisting, "site-1");
+        var b = new SiteMapping("site-east", MappingAction.MapToExisting, "site-1");
+
+        Assert.Equal(a, b);
+        Assert.Equal(a.GetHashCode(), b.GetHashCode());
+    }
+
+    [Fact]
+    public void SiteMapping_ValueEquality_DiffersWhenActionDiffers()
+    {
+        var mapTo = new SiteMapping("site-east", MappingAction.MapToExisting, "site-1");
+        var createNew = new SiteMapping("site-east", MappingAction.CreateNew, null);
+
+        Assert.NotEqual(mapTo, createNew);
+    }
+
+    [Fact]
+    public void ConnectionMapping_ValueEquality_HoldsForIdenticalFields()
+    {
+        var a = new ConnectionMapping("site-east", "OPC-Main", MappingAction.MapToExisting, "OPC-Primary");
+        var b = new ConnectionMapping("site-east", "OPC-Main", MappingAction.MapToExisting, "OPC-Primary");
+
+        Assert.Equal(a, b);
+        Assert.Equal(a.GetHashCode(), b.GetHashCode());
+    }
+
+    [Fact]
+    public void MapToExisting_CarriesNonNullTarget()
+    {
+        var site = new SiteMapping("site-east", MappingAction.MapToExisting, "site-1");
+        var conn = new ConnectionMapping("site-east", "OPC-Main", MappingAction.MapToExisting, "OPC-Primary");
+
+        Assert.Equal(MappingAction.MapToExisting, site.Action);
+        Assert.NotNull(site.TargetSiteIdentifier);
+        Assert.Equal("site-1", site.TargetSiteIdentifier);
+
+        Assert.Equal(MappingAction.MapToExisting, conn.Action);
+        Assert.NotNull(conn.TargetConnectionName);
+        Assert.Equal("OPC-Primary", conn.TargetConnectionName);
+    }
+
+    [Fact]
+    public void CreateNew_LeavesTargetNull()
+    {
+        var site = new SiteMapping("site-west", MappingAction.CreateNew, null);
+        var conn = new ConnectionMapping("site-west", "OPC-Aux", MappingAction.CreateNew, null);
+
+        Assert.Null(site.TargetSiteIdentifier);
+        Assert.Null(conn.TargetConnectionName);
+    }
+
+    [Fact]
+    public void BundleNameMap_JsonRoundTrip_PreservesSitesAndConnections()
+    {
+        var map = new BundleNameMap(
+            Sites: new[]
+            {
+                new SiteMapping("site-east", MappingAction.MapToExisting, "site-1"),
+                new SiteMapping("site-west", MappingAction.CreateNew, null),
+            },
+            Connections: new[]
+            {
+                new ConnectionMapping("site-east", "OPC-Main", MappingAction.MapToExisting, "OPC-Primary"),
+                new ConnectionMapping("site-west", "OPC-Aux", MappingAction.CreateNew, null),
+            });
+
+        var json = JsonSerializer.Serialize(map, JsonOpts);
+        var rt = JsonSerializer.Deserialize<BundleNameMap>(json, JsonOpts);
+
+        Assert.NotNull(rt);
+        // BundleNameMap's record Equals is reference-based over its IReadOnlyList members,
+        // and JSON deserialization yields List<T> rather than the original T[] — so the
+        // collections never reference-equal. The records *within* the lists have proper
+        // value-equality, so compare element-wise (SequenceEqual uses SiteMapping/
+        // ConnectionMapping value-equality).
+        Assert.True(map.Sites.SequenceEqual(rt!.Sites));
+        Assert.True(map.Connections.SequenceEqual(rt.Connections));
+    }
+
+    [Fact]
+    public void BundleNameMap_Empty_JsonRoundTrip_PreservesEmptiness()
+    {
+        var json = JsonSerializer.Serialize(BundleNameMap.Empty, JsonOpts);
+        var rt = JsonSerializer.Deserialize<BundleNameMap>(json, JsonOpts);
+
+        Assert.NotNull(rt);
+        Assert.Empty(rt!.Sites);
+        Assert.Empty(rt.Connections);
+    }
+}