diff --git a/CompatibilityTesting/Frameworks/AttributeGraph.xcframework/maccatalyst-arm64_arm64e_x86_64/AttributeGraph.framework/Headers/AGVersion.h b/CompatibilityTesting/Frameworks/AttributeGraph.xcframework/maccatalyst-arm64_arm64e_x86_64/AttributeGraph.framework/Headers/AGVersion.h
new file mode 100644
index 0000000..bb66cd2
--- /dev/null
+++ b/CompatibilityTesting/Frameworks/AttributeGraph.xcframework/maccatalyst-arm64_arm64e_x86_64/AttributeGraph.framework/Headers/AGVersion.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#include <AttributeGraph/AGBase.h>
+
+AG_EXTERN_C_BEGIN
+
+AG_EXPORT const uint32_t AGVersion AG_SWIFT_NAME(version);
+
+AG_EXTERN_C_END
diff --git a/CompatibilityTesting/Frameworks/AttributeGraph.xcframework/maccatalyst-arm64_arm64e_x86_64/AttributeGraph.framework/Headers/AttributeGraph.h b/CompatibilityTesting/Frameworks/AttributeGraph.xcframework/maccatalyst-arm64_arm64e_x86_64/AttributeGraph.framework/Headers/AttributeGraph.h
index b53cfd7..fc20870 100644
--- a/CompatibilityTesting/Frameworks/AttributeGraph.xcframework/maccatalyst-arm64_arm64e_x86_64/AttributeGraph.framework/Headers/AttributeGraph.h
+++ b/CompatibilityTesting/Frameworks/AttributeGraph.xcframework/maccatalyst-arm64_arm64e_x86_64/AttributeGraph.framework/Headers/AttributeGraph.h
@@ -25,4 +25,5 @@
 #include <AttributeGraph/AGType.h>
 #include <AttributeGraph/AGUniqueID.h>
 #include <AttributeGraph/AGValue.h>
+#include <AttributeGraph/AGVersion.h>
 #include <AttributeGraph/AGWeakAttribute.h>
diff --git a/CompatibilityTesting/Frameworks/AttributeGraph.xcframework/macos-arm64_arm64e_x86_64/AttributeGraph.framework/Versions/A/Headers/AGVersion.h b/CompatibilityTesting/Frameworks/AttributeGraph.xcframework/macos-arm64_arm64e_x86_64/AttributeGraph.framework/Versions/A/Headers/AGVersion.h
new file mode 100644
index 0000000..bb66cd2
--- /dev/null
+++ b/CompatibilityTesting/Frameworks/AttributeGraph.xcframework/macos-arm64_arm64e_x86_64/AttributeGraph.framework/Versions/A/Headers/AGVersion.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#include <AttributeGraph/AGBase.h>
+
+AG_EXTERN_C_BEGIN
+
+AG_EXPORT const uint32_t AGVersion AG_SWIFT_NAME(version);
+
+AG_EXTERN_C_END
diff --git a/CompatibilityTesting/Frameworks/AttributeGraph.xcframework/macos-arm64_arm64e_x86_64/AttributeGraph.framework/Versions/A/Headers/AttributeGraph.h b/CompatibilityTesting/Frameworks/AttributeGraph.xcframework/macos-arm64_arm64e_x86_64/AttributeGraph.framework/Versions/A/Headers/AttributeGraph.h
index b53cfd7..fc20870 100644
--- a/CompatibilityTesting/Frameworks/AttributeGraph.xcframework/macos-arm64_arm64e_x86_64/AttributeGraph.framework/Versions/A/Headers/AttributeGraph.h
+++ b/CompatibilityTesting/Frameworks/AttributeGraph.xcframework/macos-arm64_arm64e_x86_64/AttributeGraph.framework/Versions/A/Headers/AttributeGraph.h
@@ -25,4 +25,5 @@
 #include <AttributeGraph/AGType.h>
 #include <AttributeGraph/AGUniqueID.h>
 #include <AttributeGraph/AGValue.h>
+#include <AttributeGraph/AGVersion.h>
 #include <AttributeGraph/AGWeakAttribute.h>
diff --git a/Sources/ComputeCxx/Version/Version.c b/Sources/ComputeCxx/Version/Version.c
new file mode 100644
index 0000000..31705eb
--- /dev/null
+++ b/Sources/ComputeCxx/Version/Version.c
@@ -0,0 +1,3 @@
+#include "ComputeCxx/IAGVersion.h"
+
+const uint32_t IAGVersion = 0x00020021; // 2.0.33
diff --git a/Sources/ComputeCxx/include/ComputeCxx/ComputeCxx.h b/Sources/ComputeCxx/include/ComputeCxx/ComputeCxx.h
index 4bbc5cd..91d982e 100644
--- a/Sources/ComputeCxx/include/ComputeCxx/ComputeCxx.h
+++ b/Sources/ComputeCxx/include/ComputeCxx/ComputeCxx.h
@@ -25,4 +25,5 @@
 #include <ComputeCxx/IAGType.h>
 #include <ComputeCxx/IAGUniqueID.h>
 #include <ComputeCxx/IAGValue.h>
+#include <ComputeCxx/IAGVersion.h>
 #include <ComputeCxx/IAGWeakAttribute.h>
diff --git a/Sources/ComputeCxx/include/ComputeCxx/IAGVersion.h b/Sources/ComputeCxx/include/ComputeCxx/IAGVersion.h
new file mode 100644
index 0000000..00b661d
--- /dev/null
+++ b/Sources/ComputeCxx/include/ComputeCxx/IAGVersion.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#include <ComputeCxx/IAGBase.h>
+
+IAG_EXTERN_C_BEGIN
+
+IAG_EXPORT const uint32_t IAGVersion IAG_SWIFT_NAME(version);
+
+IAG_EXTERN_C_END
diff --git a/Tests/ComputeTests/Shared/Version/VersionTests.swift b/Tests/ComputeTests/Shared/Version/VersionTests.swift
new file mode 100644
index 0000000..2221fdb
--- /dev/null
+++ b/Tests/ComputeTests/Shared/Version/VersionTests.swift
@@ -0,0 +1,21 @@
+import Testing
+
+@Suite
+struct VersionTests {
+    @Test
+    func versionConstant() {
+        #if COMPATIBILITY_TESTS
+        if #available(macOS 26, iOS 26, tvOS 26, watchOS 26, *) {
+            #expect(version == 0x20021)
+        } else {
+            // not tested yet
+        }
+        #else
+        #if CompatibilityModeAttributeGraphV6
+        #expect(version == 0x2001e)
+        #else
+        #expect(version == 0x20021)
+        #endif
+        #endif
+    }
+}