diff --git a/components/core/CMakeLists.txt b/components/core/CMakeLists.txt
index 320475355a..394bb2c8a2 100644
--- a/components/core/CMakeLists.txt
+++ b/components/core/CMakeLists.txt
@@ -473,6 +473,7 @@ set(SOURCE_FILES_unitTest
         src/clp/ffi/ir_stream/protocol_constants.hpp
         src/clp/ffi/ir_stream/Serializer.cpp
         src/clp/ffi/ir_stream/Serializer.hpp
+        src/clp/ffi/ir_stream/search/AstEvaluationResult.hpp
         src/clp/ffi/ir_stream/search/NewProjectedSchemaTreeNodeCallbackReq.hpp
         src/clp/ffi/ir_stream/utils.cpp
         src/clp/ffi/ir_stream/utils.hpp
diff --git a/components/core/src/clp/ffi/ir_stream/search/AstEvaluationResult.hpp b/components/core/src/clp/ffi/ir_stream/search/AstEvaluationResult.hpp
new file mode 100644
index 0000000000..d018b363d0
--- /dev/null
+++ b/components/core/src/clp/ffi/ir_stream/search/AstEvaluationResult.hpp
@@ -0,0 +1,20 @@
+#ifndef CLP_FFI_IR_STREAM_SEARCH_ASTEVALUATIONRESULT_HPP
+#define CLP_FFI_IR_STREAM_SEARCH_ASTEVALUATIONRESULT_HPP
+
+#include <cstdint>
+
+namespace clp::ffi::ir_stream::search {
+/**
+ * Enum representing the result of evaluating a search AST.
+ */
+enum class AstEvaluationResult : uint8_t {
+    True,
+    False,
+
+    // The AST evaluation is intentionally skipped because it belongs to a pruned branch of the
+    // parent tree.
+    Pruned,
+};
+}  // namespace clp::ffi::ir_stream::search
+
+#endif  // CLP_FFI_IR_STREAM_SEARCH_ASTEVALUATIONRESULT_HPP