diff --git a/src/brainy.ts b/src/brainy.ts
index b09aa189..c43cfcce 100644
--- a/src/brainy.ts
+++ b/src/brainy.ts
@@ -1603,7 +1603,8 @@ export class Brainy<T = any> implements BrainyInterface<T> {
       limit: params.limit,
       type: params.type,
       where: params.where,
-      service: params.service
+      service: params.service,
+      includeVFS: params.includeVFS  // v4.4.0: Pass through VFS filtering
     })
   }
 
diff --git a/src/types/brainy.types.ts b/src/types/brainy.types.ts
index 260be1e4..1f54622a 100644
--- a/src/types/brainy.types.ts
+++ b/src/types/brainy.types.ts
@@ -235,6 +235,7 @@ export interface SimilarParams<T = any> {
   type?: NounType | NounType[]    // Restrict to types
   where?: Partial<T>               // Additional filters
   service?: string                 // Multi-tenancy
+  includeVFS?: boolean             // v4.4.0: Include VFS entities (default: false)
 }
 
 /**
diff --git a/src/vfs/VirtualFileSystem.ts b/src/vfs/VirtualFileSystem.ts
index a3ab2968..74e6b35a 100644
--- a/src/vfs/VirtualFileSystem.ts
+++ b/src/vfs/VirtualFileSystem.ts
@@ -954,7 +954,8 @@ export class VirtualFileSystem implements IVirtualFileSystem {
       type: [NounType.File, NounType.Document, NounType.Media],
       limit: options?.limit || 10,
       offset: options?.offset,
-      explain: options?.explain
+      explain: options?.explain,
+      includeVFS: true  // v4.4.0: VFS search must include VFS entities!
     }
 
     // Add path filter if specified
@@ -1001,7 +1002,8 @@ export class VirtualFileSystem implements IVirtualFileSystem {
       to: entityId,
       limit: options?.limit || 10,
       threshold: options?.threshold || 0.7,
-      type: [NounType.File, NounType.Document, NounType.Media]
+      type: [NounType.File, NounType.Document, NounType.Media],
+      includeVFS: true  // v4.4.0: VFS similarity search must include VFS entities!
     })
 
     return results.map(r => {
@@ -2315,7 +2317,8 @@ export class VirtualFileSystem implements IVirtualFileSystem {
         ...query.where,
         vfsType: 'entity'
       },
-      limit: query.limit || 100
+      limit: query.limit || 100,
+      includeVFS: true  // v4.4.0: VFS entity search must include VFS entities!
     }
 
     if (query.type) {
diff --git a/src/vfs/semantic/projections/AuthorProjection.ts b/src/vfs/semantic/projections/AuthorProjection.ts
index 4376c5fc..8c35781a 100644
--- a/src/vfs/semantic/projections/AuthorProjection.ts
+++ b/src/vfs/semantic/projections/AuthorProjection.ts
@@ -31,7 +31,8 @@ export class AuthorProjection extends BaseProjectionStrategy {
         vfsType: 'file',
         owner: authorName
       },
-      limit: 1000
+      limit: 1000,
+      includeVFS: true  // v4.4.0: Must include VFS entities!
     }
 
     // Filter by filename if subpath specified
@@ -58,7 +59,8 @@ export class AuthorProjection extends BaseProjectionStrategy {
         vfsType: 'file',
         owner: authorName
       },
-      limit: 1000
+      limit: 1000,
+      includeVFS: true  // v4.4.0: Must include VFS entities!
     })
 
     return this.extractIds(results)
@@ -75,7 +77,8 @@ export class AuthorProjection extends BaseProjectionStrategy {
         vfsType: 'file',
         owner: { $exists: true }
       },
-      limit
+      limit,
+      includeVFS: true  // v4.4.0: Must include VFS entities!
     })
 
     return results.map(r => r.entity as VFSEntity)
diff --git a/src/vfs/semantic/projections/TagProjection.ts b/src/vfs/semantic/projections/TagProjection.ts
index 24b6bbd6..97e737b2 100644
--- a/src/vfs/semantic/projections/TagProjection.ts
+++ b/src/vfs/semantic/projections/TagProjection.ts
@@ -31,7 +31,8 @@ export class TagProjection extends BaseProjectionStrategy {
         vfsType: 'file',
         tags: { contains: tagName }  // BFO operator for array contains
       },
-      limit: 1000
+      limit: 1000,
+      includeVFS: true  // v4.4.0: Must include VFS entities!
     }
 
     // Filter by filename if subpath specified
@@ -58,7 +59,8 @@ export class TagProjection extends BaseProjectionStrategy {
         vfsType: 'file',
         tags: { contains: tagName }  // BFO operator
       },
-      limit: 1000
+      limit: 1000,
+      includeVFS: true  // v4.4.0: Must include VFS entities!
     })
 
     return this.extractIds(results)
@@ -74,7 +76,8 @@ export class TagProjection extends BaseProjectionStrategy {
         vfsType: 'file',
         tags: { exists: true }  // BFO operator
       },
-      limit
+      limit,
+      includeVFS: true  // v4.4.0: Must include VFS entities!
     })
 
     return results.map(r => r.entity as VFSEntity)
diff --git a/src/vfs/semantic/projections/TemporalProjection.ts b/src/vfs/semantic/projections/TemporalProjection.ts
index faf79d4c..ba83ff04 100644
--- a/src/vfs/semantic/projections/TemporalProjection.ts
+++ b/src/vfs/semantic/projections/TemporalProjection.ts
@@ -78,7 +78,8 @@ export class TemporalProjection extends BaseProjectionStrategy {
           lessEqual: endOfDay.getTime()        // BFO operator
         }
       },
-      limit: 1000
+      limit: 1000,
+      includeVFS: true  // v4.4.0: Must include VFS entities!
     })
 
     return this.extractIds(results)
@@ -95,7 +96,8 @@ export class TemporalProjection extends BaseProjectionStrategy {
         vfsType: 'file',
         modified: { greaterEqual: oneDayAgo }  // BFO operator
       },
-      limit
+      limit,
+      includeVFS: true  // v4.4.0: Must include VFS entities!
     })
 
     return results.map(r => r.entity as VFSEntity)