diff --git a/src/main/kotlin/cc/unitmesh/cf/domains/DomainDispatcher.kt b/src/main/kotlin/cc/unitmesh/cf/domains/DomainDispatcher.kt
index f9bfe981..b90e0e1a 100644
--- a/src/main/kotlin/cc/unitmesh/cf/domains/DomainDispatcher.kt
+++ b/src/main/kotlin/cc/unitmesh/cf/domains/DomainDispatcher.kt
@@ -1,27 +1,31 @@
 package cc.unitmesh.cf.domains
 
-import cc.unitmesh.cf.core.Domain
 import cc.unitmesh.cf.factory.process.DomainDetector
 import cc.unitmesh.cf.factory.process.DomainDetectorPlaceholder
 import cc.unitmesh.cf.infrastructure.cache.CachedEmbedding
 import cc.unitmesh.cf.infrastructure.llms.embedding.Embedding
-import org.springframework.stereotype.Component
 import org.reflections.Reflections
-import org.reflections.scanners.SubTypesScanner
+import org.springframework.stereotype.Component
 
 @Component
 class DomainDispatcher(
     private val cachedEmbedding: CachedEmbedding,
 ) {
+    val cachedDomains: MutableList<Class<out DomainDetector>> = mutableListOf()
     fun dispatch(question: String): DomainDetector {
         val question: Embedding = cachedEmbedding.createEmbedding(question)
         return DomainDetectorPlaceholder()
     }
 
     fun lookupDomains(): List<Class<out DomainDetector>> {
-        val reflections = Reflections(DomainDispatcher::class.java.`package`.name, SubTypesScanner(false))
+        if (cachedDomains.isNotEmpty()) {
+            return cachedDomains
+        }
 
-        return reflections.getSubTypesOf(DomainDetector::class.java)
+        val domains = Reflections(DomainDispatcher::class.java.`package`.name).getSubTypesOf(DomainDetector::class.java)
             .toList()
+
+        this.cachedDomains.addAll(domains)
+        return domains
     }
 }
\ No newline at end of file
diff --git a/src/test/kotlin/cc/unitmesh/cf/domains/DomainDispatcherTest.kt b/src/test/kotlin/cc/unitmesh/cf/domains/DomainDispatcherTest.kt
index 59d47826..54daae23 100644
--- a/src/test/kotlin/cc/unitmesh/cf/domains/DomainDispatcherTest.kt
+++ b/src/test/kotlin/cc/unitmesh/cf/domains/DomainDispatcherTest.kt
@@ -1,13 +1,11 @@
 package cc.unitmesh.cf.domains
 
 import cc.unitmesh.cf.infrastructure.cache.CachedEmbedding
-import io.kotest.matchers.ints.shouldBeGreaterThan
 import io.kotest.matchers.ints.shouldBeGreaterThanOrEqual
 import io.mockk.MockKAnnotations
 import io.mockk.impl.annotations.MockK
 import io.mockk.junit5.MockKExtension
 import org.junit.jupiter.api.BeforeEach
-import org.junit.jupiter.api.Disabled
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.extension.ExtendWith