diff --git a/dist/src/smart-extractor.js b/dist/src/smart-extractor.js
index aa0fcb85..43fb9f60 100644
--- a/dist/src/smart-extractor.js
+++ b/dist/src/smart-extractor.js
@@ -7,7 +7,7 @@
  */
 import { buildExtractionPrompt, buildDedupPrompt, buildMergePrompt, } from "./extraction-prompts.js";
 import { AdmissionController, } from "./admission-control.js";
-import { ALWAYS_MERGE_CATEGORIES, MERGE_SUPPORTED_CATEGORIES, TEMPORAL_VERSIONED_CATEGORIES, normalizeCategory, } from "./memory-categories.js";
+import { ALWAYS_MERGE_CATEGORIES, getStorageCategoryForMemoryCategory, MERGE_SUPPORTED_CATEGORIES, TEMPORAL_VERSIONED_CATEGORIES, normalizeCategory, } from "./memory-categories.js";
 import { isMetaFrustrationNoise, isNoise } from "./noise-filter.js";
 import { appendRelation, buildSmartMetadata, deriveFactKey, parseSmartMetadata, stringifySmartMetadata, parseSupportInfo, updateSupportStats, } from "./smart-metadata.js";
 import { isUserMdExclusiveMemory, } from "./workspace-boundary.js";
@@ -1149,23 +1149,17 @@ export class SmartExtractor {
     /**
      * Map 6-category to existing 5-category store type for backward compatibility.
      */
+    /**
+     * Map a smart register onto its legacy storage category, delegating to the
+     * shared SMART_TO_STORAGE_CATEGORY constant (memory-categories) so the
+     * mapping has a single source of truth. Note: "reflection" is a legacy
+     * storage category minted only by the reflection writer and is deliberately
+     * absent from this map; smart extraction never produces reflection rows.
+     * The "other" fallback covers non-union values arriving from untyped
+     * callers at runtime, matching the old switch's default arm.
+     */
     mapToStoreCategory(category) {
-        switch (category) {
-            case "profile":
-                return "fact";
-            case "preferences":
-                return "preference";
-            case "entities":
-                return "entity";
-            case "events":
-                return "decision";
-            case "cases":
-                return "fact";
-            case "patterns":
-                return "other";
-            default:
-                return "other";
-        }
+        return getStorageCategoryForMemoryCategory(category) ?? "other";
     }
     /**
      * Get default importance score by category.
diff --git a/src/memory-categories.ts b/src/memory-categories.ts
index 6b4c9249..809c0327 100644
--- a/src/memory-categories.ts
+++ b/src/memory-categories.ts
@@ -31,7 +31,13 @@ export const TOOL_MEMORY_CATEGORIES = [
 export type MemoryCategory = (typeof MEMORY_CATEGORIES)[number];
 export type LegacyMemoryCategory = (typeof LEGACY_MEMORY_CATEGORIES)[number];
 
-const SMART_TO_STORAGE_CATEGORY: Record<MemoryCategory, LegacyMemoryCategory> = {
+/**
+ * Storage categories that smart registers map onto. "reflection" is minted
+ * only by the reflection writer and is deliberately absent from this map.
+ */
+export type SmartStorageCategory = Exclude<LegacyMemoryCategory, "reflection">;
+
+const SMART_TO_STORAGE_CATEGORY: Record<MemoryCategory, SmartStorageCategory> = {
   profile: "fact",
   preferences: "preference",
   entities: "entity",
@@ -172,7 +178,7 @@ export function resolveCategoryFilterCandidates(requestedCategory: string): stri
 
 export function getStorageCategoryForMemoryCategory(
   category: MemoryCategory,
-): LegacyMemoryCategory {
+): SmartStorageCategory {
   return SMART_TO_STORAGE_CATEGORY[category];
 }
 
diff --git a/src/smart-extractor.ts b/src/smart-extractor.ts
index e92c41b3..aafa3116 100644
--- a/src/smart-extractor.ts
+++ b/src/smart-extractor.ts
@@ -27,6 +27,7 @@ import {
   type ExtractionStats,
   type MemoryCategory,
   ALWAYS_MERGE_CATEGORIES,
+  getStorageCategoryForMemoryCategory,
   MERGE_SUPPORTED_CATEGORIES,
   MEMORY_CATEGORIES,
   TEMPORAL_VERSIONED_CATEGORIES,
@@ -1759,25 +1760,19 @@ export class SmartExtractor {
   /**
    * Map 6-category to existing 5-category store type for backward compatibility.
    */
+  /**
+   * Map a smart register onto its legacy storage category, delegating to the
+   * shared SMART_TO_STORAGE_CATEGORY constant (memory-categories) so the
+   * mapping has a single source of truth. Note: "reflection" is a legacy
+   * storage category minted only by the reflection writer and is deliberately
+   * absent from this map; smart extraction never produces reflection rows.
+   * The "other" fallback covers non-union values arriving from untyped
+   * callers at runtime, matching the old switch's default arm.
+   */
   private mapToStoreCategory(
     category: MemoryCategory,
   ): "preference" | "fact" | "decision" | "entity" | "other" {
-    switch (category) {
-      case "profile":
-        return "fact";
-      case "preferences":
-        return "preference";
-      case "entities":
-        return "entity";
-      case "events":
-        return "decision";
-      case "cases":
-        return "fact";
-      case "patterns":
-        return "other";
-      default:
-        return "other";
-    }
+    return getStorageCategoryForMemoryCategory(category) ?? "other";
   }
 
   /**