diff --git a/docs/architecture/service-orchestration-boundary.md b/docs/architecture/service-orchestration-boundary.md
new file mode 100644
index 0000000..5fb9d1d
--- /dev/null
+++ b/docs/architecture/service-orchestration-boundary.md
@@ -0,0 +1,13 @@
+# Thalos Service Orchestration Boundary
+
+## Purpose
+Constrain thalos-service to orchestration responsibilities after thalos-domain extraction.
+
+## Service Responsibilities
+- Coordinate identity use-case flow
+- Delegate policy/token decisions to thalos-domain abstractions
+- Adapt transport contracts
+
+## Prohibited Responsibilities
+- Owning identity decision policies
+- Owning persistence decision concerns
diff --git a/docs/migration/domain-delegation-plan.md b/docs/migration/domain-delegation-plan.md
new file mode 100644
index 0000000..d62f61d
--- /dev/null
+++ b/docs/migration/domain-delegation-plan.md
@@ -0,0 +1,10 @@
+# Thalos Domain Delegation Plan
+
+## Delegation Model
+- Use cases invoke thalos-domain abstractions for policy and token decisions.
+- Service adapters retain technical contract mapping only.
+
+## Transition Steps
+1. Replace in-service decision branches with domain calls.
+2. Keep service contract shapes stable.
+3. Validate orchestration-only responsibilities.
diff --git a/docs/migration/identity-service-regression-checks.md b/docs/migration/identity-service-regression-checks.md
new file mode 100644
index 0000000..37bf0a8
--- /dev/null
+++ b/docs/migration/identity-service-regression-checks.md
@@ -0,0 +1,10 @@
+# Identity Service Regression Checks
+
+## Checks
+- Service no longer contains policy/token decision branches.
+- Service still orchestrates required dependencies.
+- Transport contract outputs remain stable.
+
+## Evidence
+- Updated architecture docs
+- Delegation map confirmation
diff --git a/src/Thalos.Service.Application/Adapters/IIdentityCapabilityContractAdapter.cs b/src/Thalos.Service.Application/Adapters/IIdentityCapabilityContractAdapter.cs
deleted file mode 100644
index 8ac98a7..0000000
--- a/src/Thalos.Service.Application/Adapters/IIdentityCapabilityContractAdapter.cs
+++ /dev/null
@@ -1,26 +0,0 @@
-using Thalos.Service.Identity.Abstractions.Contracts;
-
-namespace Thalos.Service.Application.Adapters;
-
-/// <summary>
-/// Defines adapter boundary for integrating identity contracts into policy use cases.
-/// </summary>
-public interface IIdentityCapabilityContractAdapter
-{
-    /// <summary>
-    /// Creates a transport-neutral context request for policy evaluation.
-    /// </summary>
-    /// <param name="identityRequest">Identity policy request.</param>
-    /// <returns>Identity policy context request.</returns>
-    IdentityPolicyContextRequest CreatePolicyContext(EvaluateIdentityPolicyRequest identityRequest);
-
-    /// <summary>
-    /// Maps policy context response into identity policy response.
-    /// </summary>
-    /// <param name="identityRequest">Identity policy request.</param>
-    /// <param name="contextResponse">Identity policy context response.</param>
-    /// <returns>Identity policy response.</returns>
-    EvaluateIdentityPolicyResponse MapPolicyResponse(
-        EvaluateIdentityPolicyRequest identityRequest,
-        IdentityPolicyContextResponse contextResponse);
-}
diff --git a/src/Thalos.Service.Application/Adapters/IIdentityPolicyGrpcContractAdapter.cs b/src/Thalos.Service.Application/Adapters/IIdentityPolicyGrpcContractAdapter.cs
index 1eee486..d34f77c 100644
--- a/src/Thalos.Service.Application/Adapters/IIdentityPolicyGrpcContractAdapter.cs
+++ b/src/Thalos.Service.Application/Adapters/IIdentityPolicyGrpcContractAdapter.cs
@@ -1,5 +1,5 @@
 using Thalos.Service.Application.Grpc;
-using Thalos.Service.Identity.Abstractions.Contracts;
+using BuildingBlock.Identity.Contracts.Requests;
 
 namespace Thalos.Service.Application.Adapters;
 
diff --git a/src/Thalos.Service.Application/Adapters/IdentityCapabilityContractAdapter.cs b/src/Thalos.Service.Application/Adapters/IdentityCapabilityContractAdapter.cs
deleted file mode 100644
index 45c8f37..0000000
--- a/src/Thalos.Service.Application/Adapters/IdentityCapabilityContractAdapter.cs
+++ /dev/null
@@ -1,29 +0,0 @@
-using Thalos.Service.Identity.Abstractions.Contracts;
-
-namespace Thalos.Service.Application.Adapters;
-
-/// <summary>
-/// Default adapter implementation for identity policy contract composition.
-/// </summary>
-public sealed class IdentityCapabilityContractAdapter : IIdentityCapabilityContractAdapter
-{
-    /// <inheritdoc />
-    public IdentityPolicyContextRequest CreatePolicyContext(EvaluateIdentityPolicyRequest identityRequest)
-    {
-        return new IdentityPolicyContextRequest(
-            identityRequest.SubjectId,
-            identityRequest.TenantId,
-            identityRequest.PermissionCode);
-    }
-
-    /// <inheritdoc />
-    public EvaluateIdentityPolicyResponse MapPolicyResponse(
-        EvaluateIdentityPolicyRequest identityRequest,
-        IdentityPolicyContextResponse contextResponse)
-    {
-        return new EvaluateIdentityPolicyResponse(
-            identityRequest.SubjectId,
-            identityRequest.PermissionCode,
-            contextResponse.ContextSatisfied);
-    }
-}
diff --git a/src/Thalos.Service.Application/Adapters/IdentityPolicyGrpcContractAdapter.cs b/src/Thalos.Service.Application/Adapters/IdentityPolicyGrpcContractAdapter.cs
index fe4435d..ebfde41 100644
--- a/src/Thalos.Service.Application/Adapters/IdentityPolicyGrpcContractAdapter.cs
+++ b/src/Thalos.Service.Application/Adapters/IdentityPolicyGrpcContractAdapter.cs
@@ -1,5 +1,5 @@
 using Thalos.Service.Application.Grpc;
-using Thalos.Service.Identity.Abstractions.Contracts;
+using BuildingBlock.Identity.Contracts.Requests;
 
 namespace Thalos.Service.Application.Adapters;
 
diff --git a/src/Thalos.Service.Application/DependencyInjection/ThalosServiceRuntimeServiceCollectionExtensions.cs b/src/Thalos.Service.Application/DependencyInjection/ThalosServiceRuntimeServiceCollectionExtensions.cs
index 9d53fc0..27d9023 100644
--- a/src/Thalos.Service.Application/DependencyInjection/ThalosServiceRuntimeServiceCollectionExtensions.cs
+++ b/src/Thalos.Service.Application/DependencyInjection/ThalosServiceRuntimeServiceCollectionExtensions.cs
@@ -1,6 +1,7 @@
 using Core.Blueprint.Common.DependencyInjection;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.DependencyInjection.Extensions;
+using Thalos.Domain.Decisions;
 using Thalos.DAL.DependencyInjection;
 using Thalos.Service.Application.Adapters;
 using Thalos.Service.Application.Ports;
@@ -22,8 +23,9 @@ public static class ThalosServiceRuntimeServiceCollectionExtensions
     {
         services.AddBlueprintRuntimeCore();
         services.AddThalosDalRuntime();
+        services.TryAddSingleton<IIdentityPolicyDecisionService, IdentityPolicyDecisionService>();
+        services.TryAddSingleton<IIdentityTokenDecisionService, IdentityTokenDecisionService>();
 
-        services.TryAddSingleton<IIdentityCapabilityContractAdapter, IdentityCapabilityContractAdapter>();
         services.TryAddSingleton<IIdentityPolicyGrpcContractAdapter, IdentityPolicyGrpcContractAdapter>();
 
         services.TryAddSingleton<IIdentityTokenReadPort, IdentityTokenReadPortDalAdapter>();
diff --git a/src/Thalos.Service.Application/Ports/IIdentityPolicyContextReadPort.cs b/src/Thalos.Service.Application/Ports/IIdentityPolicyContextReadPort.cs
index 45f8b4e..3801c54 100644
--- a/src/Thalos.Service.Application/Ports/IIdentityPolicyContextReadPort.cs
+++ b/src/Thalos.Service.Application/Ports/IIdentityPolicyContextReadPort.cs
@@ -1,4 +1,5 @@
-using Thalos.Service.Identity.Abstractions.Contracts;
+using BuildingBlock.Identity.Contracts.Requests;
+using Thalos.Domain.Contracts;
 
 namespace Thalos.Service.Application.Ports;
 
@@ -12,5 +13,5 @@ public interface IIdentityPolicyContextReadPort
     /// </summary>
     /// <param name="request">Identity policy context request.</param>
     /// <returns>Identity policy context response.</returns>
-    Task<IdentityPolicyContextResponse> ReadPolicyContextAsync(IdentityPolicyContextRequest request);
+    Task<IdentityPolicyContextData> ReadPolicyContextAsync(IdentityPolicyContextRequest request);
 }
diff --git a/src/Thalos.Service.Application/Ports/IIdentityTokenReadPort.cs b/src/Thalos.Service.Application/Ports/IIdentityTokenReadPort.cs
index c513044..fc4b8bf 100644
--- a/src/Thalos.Service.Application/Ports/IIdentityTokenReadPort.cs
+++ b/src/Thalos.Service.Application/Ports/IIdentityTokenReadPort.cs
@@ -1,4 +1,5 @@
-using Thalos.Service.Identity.Abstractions.Contracts;
+using BuildingBlock.Identity.Contracts.Requests;
+using Thalos.Domain.Contracts;
 
 namespace Thalos.Service.Application.Ports;
 
@@ -12,5 +13,5 @@ public interface IIdentityTokenReadPort
     /// </summary>
     /// <param name="request">Token request contract.</param>
     /// <returns>Token response contract.</returns>
-    Task<IssueIdentityTokenResponse> IssueTokenAsync(IssueIdentityTokenRequest request);
+    Task<IdentityTokenData> ReadTokenAsync(IssueIdentityTokenRequest request);
 }
diff --git a/src/Thalos.Service.Application/Ports/IdentityPolicyContextReadPortDalAdapter.cs b/src/Thalos.Service.Application/Ports/IdentityPolicyContextReadPortDalAdapter.cs
index 1e1fe2e..d66caa9 100644
--- a/src/Thalos.Service.Application/Ports/IdentityPolicyContextReadPortDalAdapter.cs
+++ b/src/Thalos.Service.Application/Ports/IdentityPolicyContextReadPortDalAdapter.cs
@@ -1,7 +1,8 @@
 using Core.Blueprint.Common.Runtime;
+using BuildingBlock.Identity.Contracts.Requests;
 using Thalos.DAL.Contracts;
 using Thalos.DAL.Repositories;
-using Thalos.Service.Identity.Abstractions.Contracts;
+using Thalos.Domain.Contracts;
 
 namespace Thalos.Service.Application.Ports;
 
@@ -13,7 +14,7 @@ public sealed class IdentityPolicyContextReadPortDalAdapter(
     IBlueprintSystemClock clock) : IIdentityPolicyContextReadPort
 {
     /// <inheritdoc />
-    public async Task<IdentityPolicyContextResponse> ReadPolicyContextAsync(IdentityPolicyContextRequest request)
+    public async Task<IdentityPolicyContextData> ReadPolicyContextAsync(IdentityPolicyContextRequest request)
     {
         var policyLookupRequest = new IdentityPolicyLookupRequest(
             CreateEnvelope(),
@@ -24,7 +25,11 @@ public sealed class IdentityPolicyContextReadPortDalAdapter(
         var policyRecord = await identityRepository.ReadIdentityPolicyAsync(policyLookupRequest);
         if (policyRecord is null)
         {
-            return new IdentityPolicyContextResponse(request.SubjectId, request.PermissionCode, false);
+            return new IdentityPolicyContextData(
+                request.SubjectId,
+                request.PermissionCode,
+                false,
+                []);
         }
 
         var permissionSetRequest = new IdentityPermissionSetLookupRequest(
@@ -33,13 +38,15 @@ public sealed class IdentityPolicyContextReadPortDalAdapter(
             request.TenantId);
 
         var permissions = await identityRepository.ReadPermissionSetAsync(permissionSetRequest);
-        var permissionMatched = permissions.Any(permission =>
-            string.Equals(permission.PermissionCode, request.PermissionCode, StringComparison.OrdinalIgnoreCase));
+        var grantedPermissions = permissions
+            .Select(permission => permission.PermissionCode)
+            .ToArray();
 
-        return new IdentityPolicyContextResponse(
+        return new IdentityPolicyContextData(
             request.SubjectId,
             request.PermissionCode,
-            policyRecord.ContextSatisfied && permissionMatched);
+            policyRecord.ContextSatisfied,
+            grantedPermissions);
     }
 
     private IdentityContractEnvelope CreateEnvelope()
diff --git a/src/Thalos.Service.Application/Ports/IdentityTokenReadPortDalAdapter.cs b/src/Thalos.Service.Application/Ports/IdentityTokenReadPortDalAdapter.cs
index 0cc98ed..834ec48 100644
--- a/src/Thalos.Service.Application/Ports/IdentityTokenReadPortDalAdapter.cs
+++ b/src/Thalos.Service.Application/Ports/IdentityTokenReadPortDalAdapter.cs
@@ -1,7 +1,8 @@
 using Core.Blueprint.Common.Runtime;
+using BuildingBlock.Identity.Contracts.Requests;
 using Thalos.DAL.Contracts;
 using Thalos.DAL.Repositories;
-using Thalos.Service.Identity.Abstractions.Contracts;
+using Thalos.Domain.Contracts;
 
 namespace Thalos.Service.Application.Ports;
 
@@ -13,7 +14,7 @@ public sealed class IdentityTokenReadPortDalAdapter(
     IBlueprintSystemClock clock) : IIdentityTokenReadPort
 {
     /// <inheritdoc />
-    public async Task<IssueIdentityTokenResponse> IssueTokenAsync(IssueIdentityTokenRequest request)
+    public async Task<IdentityTokenData> ReadTokenAsync(IssueIdentityTokenRequest request)
     {
         var lookupRequest = new IdentityTokenLookupRequest(
             CreateEnvelope(),
@@ -23,10 +24,10 @@ public sealed class IdentityTokenReadPortDalAdapter(
         var tokenRecord = await identityRepository.ReadIdentityTokenAsync(lookupRequest);
         if (tokenRecord is null)
         {
-            return new IssueIdentityTokenResponse(string.Empty, 0);
+            return new IdentityTokenData(null, null);
         }
 
-        return new IssueIdentityTokenResponse(tokenRecord.Token, tokenRecord.ExpiresInSeconds);
+        return new IdentityTokenData(tokenRecord.Token, tokenRecord.ExpiresInSeconds);
     }
 
     private IdentityContractEnvelope CreateEnvelope()
diff --git a/src/Thalos.Service.Application/Thalos.Service.Application.csproj b/src/Thalos.Service.Application/Thalos.Service.Application.csproj
index bdb0db0..e2f9a55 100644
--- a/src/Thalos.Service.Application/Thalos.Service.Application.csproj
+++ b/src/Thalos.Service.Application/Thalos.Service.Application.csproj
@@ -6,7 +6,8 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="10.0.0" />
+    <ProjectReference Include="..\..\..\building-block-identity\src\BuildingBlock.Identity.Contracts\BuildingBlock.Identity.Contracts.csproj" />
+    <ProjectReference Include="..\..\..\thalos-domain\src\Thalos.Domain\Thalos.Domain.csproj" />
     <ProjectReference Include="..\..\..\thalos-dal\src\Thalos.DAL\Thalos.DAL.csproj" />
-    <ProjectReference Include="..\Thalos.Service.Identity.Abstractions\Thalos.Service.Identity.Abstractions.csproj" />
   </ItemGroup>
 </Project>
diff --git a/src/Thalos.Service.Application/UseCases/EvaluateIdentityPolicyUseCase.cs b/src/Thalos.Service.Application/UseCases/EvaluateIdentityPolicyUseCase.cs
index 4255e88..ef645c4 100644
--- a/src/Thalos.Service.Application/UseCases/EvaluateIdentityPolicyUseCase.cs
+++ b/src/Thalos.Service.Application/UseCases/EvaluateIdentityPolicyUseCase.cs
@@ -1,6 +1,7 @@
-using Thalos.Service.Application.Adapters;
+using BuildingBlock.Identity.Contracts.Requests;
+using BuildingBlock.Identity.Contracts.Responses;
 using Thalos.Service.Application.Ports;
-using Thalos.Service.Identity.Abstractions.Contracts;
+using Thalos.Domain.Decisions;
 
 namespace Thalos.Service.Application.UseCases;
 
@@ -8,16 +9,16 @@ namespace Thalos.Service.Application.UseCases;
 /// Default orchestration implementation for identity policy evaluation.
 /// </summary>
 public sealed class EvaluateIdentityPolicyUseCase(
-    IIdentityCapabilityContractAdapter contractAdapter,
+    IIdentityPolicyDecisionService decisionService,
     IIdentityPolicyContextReadPort policyContextReadPort)
     : IEvaluateIdentityPolicyUseCase
 {
     /// <inheritdoc />
     public async Task<EvaluateIdentityPolicyResponse> HandleAsync(EvaluateIdentityPolicyRequest request)
     {
-        var policyContextRequest = contractAdapter.CreatePolicyContext(request);
-        var policyContextResponse = await policyContextReadPort.ReadPolicyContextAsync(policyContextRequest);
+        var policyContextRequest = decisionService.BuildPolicyContextRequest(request);
+        var policyContextData = await policyContextReadPort.ReadPolicyContextAsync(policyContextRequest);
 
-        return contractAdapter.MapPolicyResponse(request, policyContextResponse);
+        return decisionService.Evaluate(request, policyContextData);
     }
 }
diff --git a/src/Thalos.Service.Application/UseCases/IEvaluateIdentityPolicyUseCase.cs b/src/Thalos.Service.Application/UseCases/IEvaluateIdentityPolicyUseCase.cs
index e503608..f51c09a 100644
--- a/src/Thalos.Service.Application/UseCases/IEvaluateIdentityPolicyUseCase.cs
+++ b/src/Thalos.Service.Application/UseCases/IEvaluateIdentityPolicyUseCase.cs
@@ -1,4 +1,5 @@
-using Thalos.Service.Identity.Abstractions.Contracts;
+using BuildingBlock.Identity.Contracts.Requests;
+using BuildingBlock.Identity.Contracts.Responses;
 
 namespace Thalos.Service.Application.UseCases;
 
diff --git a/src/Thalos.Service.Application/UseCases/IIssueIdentityTokenUseCase.cs b/src/Thalos.Service.Application/UseCases/IIssueIdentityTokenUseCase.cs
index a7a4a06..34ddc03 100644
--- a/src/Thalos.Service.Application/UseCases/IIssueIdentityTokenUseCase.cs
+++ b/src/Thalos.Service.Application/UseCases/IIssueIdentityTokenUseCase.cs
@@ -1,4 +1,5 @@
-using Thalos.Service.Identity.Abstractions.Contracts;
+using BuildingBlock.Identity.Contracts.Requests;
+using BuildingBlock.Identity.Contracts.Responses;
 
 namespace Thalos.Service.Application.UseCases;
 
diff --git a/src/Thalos.Service.Application/UseCases/IssueIdentityTokenUseCase.cs b/src/Thalos.Service.Application/UseCases/IssueIdentityTokenUseCase.cs
index a94c145..2fb6caf 100644
--- a/src/Thalos.Service.Application/UseCases/IssueIdentityTokenUseCase.cs
+++ b/src/Thalos.Service.Application/UseCases/IssueIdentityTokenUseCase.cs
@@ -1,17 +1,22 @@
+using BuildingBlock.Identity.Contracts.Requests;
+using BuildingBlock.Identity.Contracts.Responses;
 using Thalos.Service.Application.Ports;
-using Thalos.Service.Identity.Abstractions.Contracts;
+using Thalos.Domain.Decisions;
 
 namespace Thalos.Service.Application.UseCases;
 
 /// <summary>
 /// Default orchestration implementation for identity token issuance.
 /// </summary>
-public sealed class IssueIdentityTokenUseCase(IIdentityTokenReadPort readPort)
+public sealed class IssueIdentityTokenUseCase(
+    IIdentityTokenReadPort readPort,
+    IIdentityTokenDecisionService decisionService)
     : IIssueIdentityTokenUseCase
 {
     /// <inheritdoc />
-    public Task<IssueIdentityTokenResponse> HandleAsync(IssueIdentityTokenRequest request)
+    public async Task<IssueIdentityTokenResponse> HandleAsync(IssueIdentityTokenRequest request)
     {
-        return readPort.IssueTokenAsync(request);
+        var tokenData = await readPort.ReadTokenAsync(request);
+        return decisionService.BuildIssuedTokenResponse(tokenData);
     }
 }
diff --git a/src/Thalos.Service.Grpc/Services/IdentityRuntimeGrpcService.cs b/src/Thalos.Service.Grpc/Services/IdentityRuntimeGrpcService.cs
index 948cfb6..84c5991 100644
--- a/src/Thalos.Service.Grpc/Services/IdentityRuntimeGrpcService.cs
+++ b/src/Thalos.Service.Grpc/Services/IdentityRuntimeGrpcService.cs
@@ -2,7 +2,7 @@ using Grpc.Core;
 using Thalos.Service.Application.Adapters;
 using Thalos.Service.Application.Grpc;
 using Thalos.Service.Application.UseCases;
-using Thalos.Service.Identity.Abstractions.Contracts;
+using BuildingBlock.Identity.Contracts.Requests;
 
 namespace Thalos.Service.Grpc.Services;
 
diff --git a/src/Thalos.Service.Grpc/Thalos.Service.Grpc.csproj b/src/Thalos.Service.Grpc/Thalos.Service.Grpc.csproj
index 4db7838..c10fc1d 100644
--- a/src/Thalos.Service.Grpc/Thalos.Service.Grpc.csproj
+++ b/src/Thalos.Service.Grpc/Thalos.Service.Grpc.csproj
@@ -14,6 +14,5 @@
   <ItemGroup>
     <Protobuf Include="Protos\identity_runtime.proto" GrpcServices="Server" />
     <ProjectReference Include="..\Thalos.Service.Application\Thalos.Service.Application.csproj" />
-    <ProjectReference Include="..\Thalos.Service.Identity.Abstractions\Thalos.Service.Identity.Abstractions.csproj" />
   </ItemGroup>
 </Project>
diff --git a/tests/Thalos.Service.Application.UnitTests/EvaluateIdentityPolicyUseCaseTests.cs b/tests/Thalos.Service.Application.UnitTests/EvaluateIdentityPolicyUseCaseTests.cs
index 8cb71a9..b9f7697 100644
--- a/tests/Thalos.Service.Application.UnitTests/EvaluateIdentityPolicyUseCaseTests.cs
+++ b/tests/Thalos.Service.Application.UnitTests/EvaluateIdentityPolicyUseCaseTests.cs
@@ -1,7 +1,9 @@
-using Thalos.Service.Application.Adapters;
+using BuildingBlock.Identity.Contracts.Requests;
+using BuildingBlock.Identity.Contracts.Responses;
 using Thalos.Service.Application.Ports;
 using Thalos.Service.Application.UseCases;
-using Thalos.Service.Identity.Abstractions.Contracts;
+using Thalos.Domain.Contracts;
+using Thalos.Domain.Decisions;
 
 namespace Thalos.Service.Application.UnitTests;
 
@@ -11,7 +13,7 @@ public class EvaluateIdentityPolicyUseCaseTests
     public async Task HandleAsync_WhenCalled_UsesIdentityContractsAndReturnsMappedResponse()
     {
         var useCase = new EvaluateIdentityPolicyUseCase(
-            new FakeIdentityCapabilityContractAdapter(),
+            new FakeIdentityPolicyDecisionService(),
             new FakeIdentityPolicyContextReadPort());
 
         var response = await useCase.HandleAsync(new EvaluateIdentityPolicyRequest("subject-1", "tenant-1", "perm.read"));
@@ -21,29 +23,33 @@ public class EvaluateIdentityPolicyUseCaseTests
         Assert.True(response.IsAllowed);
     }
 
-    private sealed class FakeIdentityCapabilityContractAdapter : IIdentityCapabilityContractAdapter
+    private sealed class FakeIdentityPolicyDecisionService : IIdentityPolicyDecisionService
     {
-        public IdentityPolicyContextRequest CreatePolicyContext(EvaluateIdentityPolicyRequest identityRequest)
+        public IdentityPolicyContextRequest BuildPolicyContextRequest(EvaluateIdentityPolicyRequest request)
         {
-            return new IdentityPolicyContextRequest(identityRequest.SubjectId, identityRequest.TenantId, identityRequest.PermissionCode);
+            return new IdentityPolicyContextRequest(request.SubjectId, request.TenantId, request.PermissionCode);
         }
 
-        public EvaluateIdentityPolicyResponse MapPolicyResponse(
-            EvaluateIdentityPolicyRequest identityRequest,
-            IdentityPolicyContextResponse contextResponse)
+        public EvaluateIdentityPolicyResponse Evaluate(
+            EvaluateIdentityPolicyRequest request,
+            IdentityPolicyContextData policyContextData)
         {
             return new EvaluateIdentityPolicyResponse(
-                identityRequest.SubjectId,
-                identityRequest.PermissionCode,
-                contextResponse.ContextSatisfied);
+                request.SubjectId,
+                request.PermissionCode,
+                policyContextData.ContextSatisfied);
         }
     }
 
     private sealed class FakeIdentityPolicyContextReadPort : IIdentityPolicyContextReadPort
     {
-        public Task<IdentityPolicyContextResponse> ReadPolicyContextAsync(IdentityPolicyContextRequest request)
+        public Task<IdentityPolicyContextData> ReadPolicyContextAsync(IdentityPolicyContextRequest request)
         {
-            return Task.FromResult(new IdentityPolicyContextResponse(request.SubjectId, request.PermissionCode, true));
+            return Task.FromResult(new IdentityPolicyContextData(
+                request.SubjectId,
+                request.PermissionCode,
+                true,
+                [request.PermissionCode]));
         }
     }
 }
diff --git a/tests/Thalos.Service.Application.UnitTests/IssueIdentityTokenUseCaseTests.cs b/tests/Thalos.Service.Application.UnitTests/IssueIdentityTokenUseCaseTests.cs
index 50685bf..49282b3 100644
--- a/tests/Thalos.Service.Application.UnitTests/IssueIdentityTokenUseCaseTests.cs
+++ b/tests/Thalos.Service.Application.UnitTests/IssueIdentityTokenUseCaseTests.cs
@@ -1,6 +1,8 @@
+using BuildingBlock.Identity.Contracts.Requests;
 using Thalos.Service.Application.Ports;
 using Thalos.Service.Application.UseCases;
-using Thalos.Service.Identity.Abstractions.Contracts;
+using Thalos.Domain.Contracts;
+using Thalos.Domain.Decisions;
 
 namespace Thalos.Service.Application.UnitTests;
 
@@ -9,8 +11,9 @@ public class IssueIdentityTokenUseCaseTests
     [Fact]
     public async Task HandleAsync_WhenCalled_DelegatesToReadPort()
     {
+        var decisionService = new IdentityTokenDecisionService();
         var port = new FakeIdentityTokenReadPort();
-        var useCase = new IssueIdentityTokenUseCase(port);
+        var useCase = new IssueIdentityTokenUseCase(port, decisionService);
 
         var response = await useCase.HandleAsync(new IssueIdentityTokenRequest("user-1", "tenant-1"));
 
@@ -20,9 +23,9 @@ public class IssueIdentityTokenUseCaseTests
 
     private sealed class FakeIdentityTokenReadPort : IIdentityTokenReadPort
     {
-        public Task<IssueIdentityTokenResponse> IssueTokenAsync(IssueIdentityTokenRequest request)
+        public Task<IdentityTokenData> ReadTokenAsync(IssueIdentityTokenRequest request)
         {
-            return Task.FromResult(new IssueIdentityTokenResponse("token-123", 3600));
+            return Task.FromResult(new IdentityTokenData("token-123", 3600));
         }
     }
 }
diff --git a/tests/Thalos.Service.Application.UnitTests/RuntimeWiringTests.cs b/tests/Thalos.Service.Application.UnitTests/RuntimeWiringTests.cs
index fee3f25..ca99bce 100644
--- a/tests/Thalos.Service.Application.UnitTests/RuntimeWiringTests.cs
+++ b/tests/Thalos.Service.Application.UnitTests/RuntimeWiringTests.cs
@@ -1,9 +1,9 @@
 using Microsoft.Extensions.DependencyInjection;
+using BuildingBlock.Identity.Contracts.Requests;
 using Thalos.Service.Application.Adapters;
 using Thalos.Service.Application.DependencyInjection;
 using Thalos.Service.Application.Grpc;
 using Thalos.Service.Application.UseCases;
-using Thalos.Service.Identity.Abstractions.Contracts;
 
 namespace Thalos.Service.Application.UnitTests;
 
diff --git a/tests/Thalos.Service.Application.UnitTests/Thalos.Service.Application.UnitTests.csproj b/tests/Thalos.Service.Application.UnitTests/Thalos.Service.Application.UnitTests.csproj
index a08db62..0453bd8 100644
--- a/tests/Thalos.Service.Application.UnitTests/Thalos.Service.Application.UnitTests.csproj
+++ b/tests/Thalos.Service.Application.UnitTests/Thalos.Service.Application.UnitTests.csproj
@@ -17,6 +17,5 @@
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\src\Thalos.Service.Application\Thalos.Service.Application.csproj" />
-    <ProjectReference Include="..\..\src\Thalos.Service.Identity.Abstractions\Thalos.Service.Identity.Abstractions.csproj" />
   </ItemGroup>
 </Project>