diff --git a/Directory.Build.props b/Directory.Build.props
index 591f9003ab..6984b09245 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -20,6 +20,12 @@
 		<ContinuousIntegrationBuild Condition="'$(CI)' == 'true'">true</ContinuousIntegrationBuild>
 	</PropertyGroup>
 
+	<PropertyGroup Label="SourceLink">
+		<!-- Copilot coding agent sandboxes do not expose repository metadata to SourceLink. -->
+		<EnableSourceControlManagerQueries Condition="'$(COPILOT_AGENT_ACTION)' != ''">false</EnableSourceControlManagerQueries>
+		<EnableSourceLink Condition="'$(COPILOT_AGENT_ACTION)' != ''">false</EnableSourceLink>
+	</PropertyGroup>
+
 	<PropertyGroup Label="Common Build Settings">
 		<IsPackable>true</IsPackable>
 		<Nullable>enable</Nullable>
diff --git a/samples/Ark.MediatorFramework.Sample/Directory.Build.props b/samples/Ark.MediatorFramework.Sample/Directory.Build.props
index 553dc38d7a..cea9bfa4b7 100644
--- a/samples/Ark.MediatorFramework.Sample/Directory.Build.props
+++ b/samples/Ark.MediatorFramework.Sample/Directory.Build.props
@@ -24,6 +24,12 @@
     <ContinuousIntegrationBuild Condition="'$(CI)' == 'true'">true</ContinuousIntegrationBuild>
   </PropertyGroup>
 
+  <PropertyGroup Label="SourceLink">
+    <!-- Copilot coding agent sandboxes do not expose repository metadata to SourceLink. -->
+    <EnableSourceControlManagerQueries Condition="'$(COPILOT_AGENT_ACTION)' != ''">false</EnableSourceControlManagerQueries>
+    <EnableSourceLink Condition="'$(COPILOT_AGENT_ACTION)' != ''">false</EnableSourceLink>
+  </PropertyGroup>
+
   <PropertyGroup Label="Common Build Settings">
     <IsPackable>false</IsPackable>
     <Nullable>enable</Nullable>
diff --git a/samples/Ark.ReferenceProject/Directory.Build.props b/samples/Ark.ReferenceProject/Directory.Build.props
index b314e3aeea..a5f0c503a5 100644
--- a/samples/Ark.ReferenceProject/Directory.Build.props
+++ b/samples/Ark.ReferenceProject/Directory.Build.props
@@ -16,6 +16,12 @@
 		<ContinuousIntegrationBuild Condition="'$(CI)' == 'true'">true</ContinuousIntegrationBuild>
 	</PropertyGroup>
 
+	<PropertyGroup Label="SourceLink">
+		<!-- Copilot coding agent sandboxes do not expose repository metadata to SourceLink. -->
+		<EnableSourceControlManagerQueries Condition="'$(COPILOT_AGENT_ACTION)' != ''">false</EnableSourceControlManagerQueries>
+		<EnableSourceLink Condition="'$(COPILOT_AGENT_ACTION)' != ''">false</EnableSourceLink>
+	</PropertyGroup>
+
   <PropertyGroup Label="Common Build Settings">
 	<IsPackable>false</IsPackable>
 	<Nullable>enable</Nullable>
diff --git a/samples/Ark.ResourceWatcher/Directory.Build.props b/samples/Ark.ResourceWatcher/Directory.Build.props
index 259f5a47dd..b07da691d7 100644
--- a/samples/Ark.ResourceWatcher/Directory.Build.props
+++ b/samples/Ark.ResourceWatcher/Directory.Build.props
@@ -16,6 +16,12 @@
 		<ContinuousIntegrationBuild Condition="'$(CI)' == 'true'">true</ContinuousIntegrationBuild>
 	</PropertyGroup>
 
+	<PropertyGroup Label="SourceLink">
+		<!-- Copilot coding agent sandboxes do not expose repository metadata to SourceLink. -->
+		<EnableSourceControlManagerQueries Condition="'$(COPILOT_AGENT_ACTION)' != ''">false</EnableSourceControlManagerQueries>
+		<EnableSourceLink Condition="'$(COPILOT_AGENT_ACTION)' != ''">false</EnableSourceLink>
+	</PropertyGroup>
+
   <PropertyGroup Label="Common Build Settings">
 	<IsPackable>false</IsPackable>
 	<Nullable>enable</Nullable>