diff --git a/Tests/FirebladeECSTests/Generated/FamilyTests.generated.swift b/Tests/FirebladeECSTests/Generated/FamilyTests.generated.swift
index a00cad9..2b6a2a8 100644
--- a/Tests/FirebladeECSTests/Generated/FamilyTests.generated.swift
+++ b/Tests/FirebladeECSTests/Generated/FamilyTests.generated.swift
@@ -25,6 +25,20 @@ final class Family1Tests: XCTestCase {
         XCTAssertEqual(entity[\Comp1.value], 0)
     }
 
+    func testMemberCreationBuilder() {
+        let family = nexus.family(requires: Comp1.self)
+        XCTAssertTrue(family.isEmpty)
+        let entity = family.createMember {
+            Comp1(0)
+        }
+        XCTAssertEqual(family.count, 1)
+        XCTAssertEqual(entity.numComponents, 1)
+        XCTAssertEqual(nexus.numFamilies, 1)
+        XCTAssertEqual(nexus.numEntities, 1)
+        XCTAssertEqual(nexus.numComponents, 1)
+        XCTAssertEqual(entity[\Comp1.value], 0)
+    }
+
     func testComponentIteration() {
         let family = nexus.family(requires: Comp1.self)
         XCTAssertTrue(family.isEmpty)
@@ -157,6 +171,22 @@ final class Family2Tests: XCTestCase {
         XCTAssertEqual(entity[\Comp2.value], 1)
     }
 
+    func testMemberCreationBuilder() {
+        let family = nexus.family(requiresAll: Comp1.self, Comp2.self)
+        XCTAssertTrue(family.isEmpty)
+        let entity = family.createMember {
+            Comp1(0)
+            Comp2(1)
+        }
+        XCTAssertEqual(family.count, 1)
+        XCTAssertEqual(entity.numComponents, 2)
+        XCTAssertEqual(nexus.numFamilies, 1)
+        XCTAssertEqual(nexus.numEntities, 1)
+        XCTAssertEqual(nexus.numComponents, 2)
+        XCTAssertEqual(entity[\Comp1.value], 0)
+        XCTAssertEqual(entity[\Comp2.value], 1)
+    }
+
     func testComponentIteration() {
         let family = nexus.family(requiresAll: Comp1.self, Comp2.self)
         XCTAssertTrue(family.isEmpty)
@@ -295,6 +325,24 @@ final class Family3Tests: XCTestCase {
         XCTAssertEqual(entity[\Comp3.value], 2)
     }
 
+    func testMemberCreationBuilder() {
+        let family = nexus.family(requiresAll: Comp1.self, Comp2.self, Comp3.self)
+        XCTAssertTrue(family.isEmpty)
+        let entity = family.createMember {
+            Comp1(0)
+            Comp2(1)
+            Comp3(2)
+        }
+        XCTAssertEqual(family.count, 1)
+        XCTAssertEqual(entity.numComponents, 3)
+        XCTAssertEqual(nexus.numFamilies, 1)
+        XCTAssertEqual(nexus.numEntities, 1)
+        XCTAssertEqual(nexus.numComponents, 3)
+        XCTAssertEqual(entity[\Comp1.value], 0)
+        XCTAssertEqual(entity[\Comp2.value], 1)
+        XCTAssertEqual(entity[\Comp3.value], 2)
+    }
+
     func testComponentIteration() {
         let family = nexus.family(requiresAll: Comp1.self, Comp2.self, Comp3.self)
         XCTAssertTrue(family.isEmpty)
@@ -439,6 +487,26 @@ final class Family4Tests: XCTestCase {
         XCTAssertEqual(entity[\Comp4.value], 3)
     }
 
+    func testMemberCreationBuilder() {
+        let family = nexus.family(requiresAll: Comp1.self, Comp2.self, Comp3.self, Comp4.self)
+        XCTAssertTrue(family.isEmpty)
+        let entity = family.createMember {
+            Comp1(0)
+            Comp2(1)
+            Comp3(2)
+            Comp4(3)
+        }
+        XCTAssertEqual(family.count, 1)
+        XCTAssertEqual(entity.numComponents, 4)
+        XCTAssertEqual(nexus.numFamilies, 1)
+        XCTAssertEqual(nexus.numEntities, 1)
+        XCTAssertEqual(nexus.numComponents, 4)
+        XCTAssertEqual(entity[\Comp1.value], 0)
+        XCTAssertEqual(entity[\Comp2.value], 1)
+        XCTAssertEqual(entity[\Comp3.value], 2)
+        XCTAssertEqual(entity[\Comp4.value], 3)
+    }
+
     func testComponentIteration() {
         let family = nexus.family(requiresAll: Comp1.self, Comp2.self, Comp3.self, Comp4.self)
         XCTAssertTrue(family.isEmpty)
@@ -589,6 +657,28 @@ final class Family5Tests: XCTestCase {
         XCTAssertEqual(entity[\Comp5.value], 4)
     }
 
+    func testMemberCreationBuilder() {
+        let family = nexus.family(requiresAll: Comp1.self, Comp2.self, Comp3.self, Comp4.self, Comp5.self)
+        XCTAssertTrue(family.isEmpty)
+        let entity = family.createMember {
+            Comp1(0)
+            Comp2(1)
+            Comp3(2)
+            Comp4(3)
+            Comp5(4)
+        }
+        XCTAssertEqual(family.count, 1)
+        XCTAssertEqual(entity.numComponents, 5)
+        XCTAssertEqual(nexus.numFamilies, 1)
+        XCTAssertEqual(nexus.numEntities, 1)
+        XCTAssertEqual(nexus.numComponents, 5)
+        XCTAssertEqual(entity[\Comp1.value], 0)
+        XCTAssertEqual(entity[\Comp2.value], 1)
+        XCTAssertEqual(entity[\Comp3.value], 2)
+        XCTAssertEqual(entity[\Comp4.value], 3)
+        XCTAssertEqual(entity[\Comp5.value], 4)
+    }
+
     func testComponentIteration() {
         let family = nexus.family(requiresAll: Comp1.self, Comp2.self, Comp3.self, Comp4.self, Comp5.self)
         XCTAssertTrue(family.isEmpty)
@@ -745,6 +835,30 @@ final class Family6Tests: XCTestCase {
         XCTAssertEqual(entity[\Comp6.value], 5)
     }
 
+    func testMemberCreationBuilder() {
+        let family = nexus.family(requiresAll: Comp1.self, Comp2.self, Comp3.self, Comp4.self, Comp5.self, Comp6.self)
+        XCTAssertTrue(family.isEmpty)
+        let entity = family.createMember {
+            Comp1(0)
+            Comp2(1)
+            Comp3(2)
+            Comp4(3)
+            Comp5(4)
+            Comp6(5)
+        }
+        XCTAssertEqual(family.count, 1)
+        XCTAssertEqual(entity.numComponents, 6)
+        XCTAssertEqual(nexus.numFamilies, 1)
+        XCTAssertEqual(nexus.numEntities, 1)
+        XCTAssertEqual(nexus.numComponents, 6)
+        XCTAssertEqual(entity[\Comp1.value], 0)
+        XCTAssertEqual(entity[\Comp2.value], 1)
+        XCTAssertEqual(entity[\Comp3.value], 2)
+        XCTAssertEqual(entity[\Comp4.value], 3)
+        XCTAssertEqual(entity[\Comp5.value], 4)
+        XCTAssertEqual(entity[\Comp6.value], 5)
+    }
+
     func testComponentIteration() {
         let family = nexus.family(requiresAll: Comp1.self, Comp2.self, Comp3.self, Comp4.self, Comp5.self, Comp6.self)
         XCTAssertTrue(family.isEmpty)
@@ -907,6 +1021,32 @@ final class Family7Tests: XCTestCase {
         XCTAssertEqual(entity[\Comp7.value], 6)
     }
 
+    func testMemberCreationBuilder() {
+        let family = nexus.family(requiresAll: Comp1.self, Comp2.self, Comp3.self, Comp4.self, Comp5.self, Comp6.self, Comp7.self)
+        XCTAssertTrue(family.isEmpty)
+        let entity = family.createMember {
+            Comp1(0)
+            Comp2(1)
+            Comp3(2)
+            Comp4(3)
+            Comp5(4)
+            Comp6(5)
+            Comp7(6)
+        }
+        XCTAssertEqual(family.count, 1)
+        XCTAssertEqual(entity.numComponents, 7)
+        XCTAssertEqual(nexus.numFamilies, 1)
+        XCTAssertEqual(nexus.numEntities, 1)
+        XCTAssertEqual(nexus.numComponents, 7)
+        XCTAssertEqual(entity[\Comp1.value], 0)
+        XCTAssertEqual(entity[\Comp2.value], 1)
+        XCTAssertEqual(entity[\Comp3.value], 2)
+        XCTAssertEqual(entity[\Comp4.value], 3)
+        XCTAssertEqual(entity[\Comp5.value], 4)
+        XCTAssertEqual(entity[\Comp6.value], 5)
+        XCTAssertEqual(entity[\Comp7.value], 6)
+    }
+
     func testComponentIteration() {
         let family = nexus.family(requiresAll: Comp1.self, Comp2.self, Comp3.self, Comp4.self, Comp5.self, Comp6.self, Comp7.self)
         XCTAssertTrue(family.isEmpty)
@@ -1075,6 +1215,34 @@ final class Family8Tests: XCTestCase {
         XCTAssertEqual(entity[\Comp8.value], 7)
     }
 
+    func testMemberCreationBuilder() {
+        let family = nexus.family(requiresAll: Comp1.self, Comp2.self, Comp3.self, Comp4.self, Comp5.self, Comp6.self, Comp7.self, Comp8.self)
+        XCTAssertTrue(family.isEmpty)
+        let entity = family.createMember {
+            Comp1(0)
+            Comp2(1)
+            Comp3(2)
+            Comp4(3)
+            Comp5(4)
+            Comp6(5)
+            Comp7(6)
+            Comp8(7)
+        }
+        XCTAssertEqual(family.count, 1)
+        XCTAssertEqual(entity.numComponents, 8)
+        XCTAssertEqual(nexus.numFamilies, 1)
+        XCTAssertEqual(nexus.numEntities, 1)
+        XCTAssertEqual(nexus.numComponents, 8)
+        XCTAssertEqual(entity[\Comp1.value], 0)
+        XCTAssertEqual(entity[\Comp2.value], 1)
+        XCTAssertEqual(entity[\Comp3.value], 2)
+        XCTAssertEqual(entity[\Comp4.value], 3)
+        XCTAssertEqual(entity[\Comp5.value], 4)
+        XCTAssertEqual(entity[\Comp6.value], 5)
+        XCTAssertEqual(entity[\Comp7.value], 6)
+        XCTAssertEqual(entity[\Comp8.value], 7)
+    }
+
     func testComponentIteration() {
         let family = nexus.family(requiresAll: Comp1.self, Comp2.self, Comp3.self, Comp4.self, Comp5.self, Comp6.self, Comp7.self, Comp8.self)
         XCTAssertTrue(family.isEmpty)
diff --git a/Tests/FirebladeECSTests/XCTestManifests.swift b/Tests/FirebladeECSTests/XCTestManifests.swift
index ea23498..26801e8 100644
--- a/Tests/FirebladeECSTests/XCTestManifests.swift
+++ b/Tests/FirebladeECSTests/XCTestManifests.swift
@@ -57,7 +57,8 @@ extension Family1Tests {
         ("testFamilyDecoding", testFamilyDecoding),
         ("testFamilyEncoding", testFamilyEncoding),
         ("testFamilyFailDecoding", testFamilyFailDecoding),
-        ("testMemberCreation", testMemberCreation)
+        ("testMemberCreation", testMemberCreation),
+        ("testMemberCreationBuilder", testMemberCreationBuilder)
     ]
 }
 
@@ -72,7 +73,8 @@ extension Family2Tests {
         ("testFamilyDecoding", testFamilyDecoding),
         ("testFamilyEncoding", testFamilyEncoding),
         ("testFamilyFailDecoding", testFamilyFailDecoding),
-        ("testMemberCreation", testMemberCreation)
+        ("testMemberCreation", testMemberCreation),
+        ("testMemberCreationBuilder", testMemberCreationBuilder)
     ]
 }
 
@@ -87,7 +89,8 @@ extension Family3Tests {
         ("testFamilyDecoding", testFamilyDecoding),
         ("testFamilyEncoding", testFamilyEncoding),
         ("testFamilyFailDecoding", testFamilyFailDecoding),
-        ("testMemberCreation", testMemberCreation)
+        ("testMemberCreation", testMemberCreation),
+        ("testMemberCreationBuilder", testMemberCreationBuilder)
     ]
 }
 
@@ -102,7 +105,8 @@ extension Family4Tests {
         ("testFamilyDecoding", testFamilyDecoding),
         ("testFamilyEncoding", testFamilyEncoding),
         ("testFamilyFailDecoding", testFamilyFailDecoding),
-        ("testMemberCreation", testMemberCreation)
+        ("testMemberCreation", testMemberCreation),
+        ("testMemberCreationBuilder", testMemberCreationBuilder)
     ]
 }
 
@@ -117,7 +121,8 @@ extension Family5Tests {
         ("testFamilyDecoding", testFamilyDecoding),
         ("testFamilyEncoding", testFamilyEncoding),
         ("testFamilyFailDecoding", testFamilyFailDecoding),
-        ("testMemberCreation", testMemberCreation)
+        ("testMemberCreation", testMemberCreation),
+        ("testMemberCreationBuilder", testMemberCreationBuilder)
     ]
 }
 
@@ -132,7 +137,8 @@ extension Family6Tests {
         ("testFamilyDecoding", testFamilyDecoding),
         ("testFamilyEncoding", testFamilyEncoding),
         ("testFamilyFailDecoding", testFamilyFailDecoding),
-        ("testMemberCreation", testMemberCreation)
+        ("testMemberCreation", testMemberCreation),
+        ("testMemberCreationBuilder", testMemberCreationBuilder)
     ]
 }
 
@@ -147,7 +153,8 @@ extension Family7Tests {
         ("testFamilyDecoding", testFamilyDecoding),
         ("testFamilyEncoding", testFamilyEncoding),
         ("testFamilyFailDecoding", testFamilyFailDecoding),
-        ("testMemberCreation", testMemberCreation)
+        ("testMemberCreation", testMemberCreation),
+        ("testMemberCreationBuilder", testMemberCreationBuilder)
     ]
 }
 
@@ -162,7 +169,8 @@ extension Family8Tests {
         ("testFamilyDecoding", testFamilyDecoding),
         ("testFamilyEncoding", testFamilyEncoding),
         ("testFamilyFailDecoding", testFamilyFailDecoding),
-        ("testMemberCreation", testMemberCreation)
+        ("testMemberCreation", testMemberCreation),
+        ("testMemberCreationBuilder", testMemberCreationBuilder)
     ]
 }