diff --git a/Agents.md b/Agents.md
index d21d466..44c34f4 100644
--- a/Agents.md
+++ b/Agents.md
@@ -544,6 +544,10 @@ Add keys to `Info.plist` that bridge xcconfig values to Swift:
 
 #### Step 5: Create Swift Interface
 
+**Why this is needed:** Swift code cannot read xcconfig files directly. The xcconfig values flow through Info.plist, and this Swift file provides a clean API to access them at runtime. Without this file, you'd have to call `Bundle.main.object(forInfoDictionaryKey:)` everywhere you need an identifier.
+
+**When to use:** Any Swift code that needs App Group identifiers, CloudKit containers, custom domains, or other configuration values must use `AppIdentifiers.*` instead of hardcoding strings.
+
 Create `Configuration/AppIdentifiers.swift`:
 
 ```swift
@@ -746,3 +750,4 @@ Then clean build (⇧⌘K) and rebuild. Everything updates automatically—inclu
 - Verify that documentation reflects any new functionality.
 - Check for duplicate code before submitting.
 - Ensure all new files follow the one-type-per-file rule.
+
diff --git a/Blackjack/Blackjack.xcodeproj/project.pbxproj b/Blackjack/Blackjack.xcodeproj/project.pbxproj
index e0b5d46..e7b8cc1 100644
--- a/Blackjack/Blackjack.xcodeproj/project.pbxproj
+++ b/Blackjack/Blackjack.xcodeproj/project.pbxproj
@@ -31,9 +31,8 @@
 		EA5ADA2F2EF9CC2C0040CB90 /* Blackjack.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Blackjack.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		EA5ADA3C2EF9CC2D0040CB90 /* BlackjackTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = BlackjackTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		EA5ADA462EF9CC2D0040CB90 /* BlackjackUITests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = BlackjackUITests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
-		EACONFIG001000000000000 /* Base.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Blackjack/Configuration/Base.xcconfig; sourceTree = SOURCE_ROOT; };
-		EACONFIG002000000000000 /* Debug.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Blackjack/Configuration/Debug.xcconfig; sourceTree = SOURCE_ROOT; };
-		EACONFIG003000000000000 /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Blackjack/Configuration/Release.xcconfig; sourceTree = SOURCE_ROOT; };
+		EACONFIG002000000000000 /* Blackjack/Configuration/Debug.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Blackjack/Configuration/Debug.xcconfig; sourceTree = SOURCE_ROOT; };
+		EACONFIG003000000000000 /* Blackjack/Configuration/Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Blackjack/Configuration/Release.xcconfig; sourceTree = SOURCE_ROOT; };
 /* End PBXFileReference section */
 
 /* Begin PBXFileSystemSynchronizedRootGroup section */
@@ -80,6 +79,15 @@
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		EA39BD632F1EB1D70073D1E1 /* Recovered References */ = {
+			isa = PBXGroup;
+			children = (
+				EACONFIG002000000000000 /* Blackjack/Configuration/Debug.xcconfig */,
+				EACONFIG003000000000000 /* Blackjack/Configuration/Release.xcconfig */,
+			);
+			name = "Recovered References";
+			sourceTree = "<group>";
+		};
 		EA5ADA262EF9CC2C0040CB90 = {
 			isa = PBXGroup;
 			children = (
@@ -87,6 +95,7 @@
 				EA5ADA3F2EF9CC2D0040CB90 /* BlackjackTests */,
 				EA5ADA492EF9CC2D0040CB90 /* BlackjackUITests */,
 				EA5ADA302EF9CC2C0040CB90 /* Products */,
+				EA39BD632F1EB1D70073D1E1 /* Recovered References */,
 			);
 			sourceTree = "<group>";
 		};
@@ -285,7 +294,7 @@
 /* Begin XCBuildConfiguration section */
 		EA5ADA4E2EF9CC2D0040CB90 /* Debug */ = {
 			isa = XCBuildConfiguration;
-			baseConfigurationReference = EACONFIG002000000000000 /* Debug.xcconfig */;
+			baseConfigurationReference = EACONFIG002000000000000 /* Blackjack/Configuration/Debug.xcconfig */;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
@@ -349,7 +358,7 @@
 		};
 		EA5ADA4F2EF9CC2D0040CB90 /* Release */ = {
 			isa = XCBuildConfiguration;
-			baseConfigurationReference = EACONFIG003000000000000 /* Release.xcconfig */;
+			baseConfigurationReference = EACONFIG003000000000000 /* Blackjack/Configuration/Release.xcconfig */;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;