diff --git a/AG/AttributeGraph.xcframework/ios-arm64-arm64e/AttributeGraph.framework/Headers/AGWeakAttribute.h b/AG/AttributeGraph.xcframework/ios-arm64-arm64e/AttributeGraph.framework/Headers/AGWeakAttribute.h
index 1bfe921b..0efc34a3 100644
--- a/AG/AttributeGraph.xcframework/ios-arm64-arm64e/AttributeGraph.framework/Headers/AGWeakAttribute.h
+++ b/AG/AttributeGraph.xcframework/ios-arm64-arm64e/AttributeGraph.framework/Headers/AGWeakAttribute.h
@@ -28,6 +28,10 @@ AG_EXPORT
 AG_REFINED_FOR_SWIFT
 AGAttribute AGWeakAttributeGetAttribute(AGWeakAttribute weakAttribute);
 
+AG_EXPORT
+AG_REFINED_FOR_SWIFT
+AGValue AGGraphGetWeakValue(AGWeakAttribute weakAttribute, AGValueOptions options, AGTypeID type);
+
 AG_EXTERN_C_END
 
 AG_ASSUME_NONNULL_END
diff --git a/AG/AttributeGraph.xcframework/ios-arm64-x86_64-simulator/AttributeGraph.framework/Headers/AGWeakAttribute.h b/AG/AttributeGraph.xcframework/ios-arm64-x86_64-simulator/AttributeGraph.framework/Headers/AGWeakAttribute.h
index 1bfe921b..0efc34a3 100644
--- a/AG/AttributeGraph.xcframework/ios-arm64-x86_64-simulator/AttributeGraph.framework/Headers/AGWeakAttribute.h
+++ b/AG/AttributeGraph.xcframework/ios-arm64-x86_64-simulator/AttributeGraph.framework/Headers/AGWeakAttribute.h
@@ -28,6 +28,10 @@ AG_EXPORT
 AG_REFINED_FOR_SWIFT
 AGAttribute AGWeakAttributeGetAttribute(AGWeakAttribute weakAttribute);
 
+AG_EXPORT
+AG_REFINED_FOR_SWIFT
+AGValue AGGraphGetWeakValue(AGWeakAttribute weakAttribute, AGValueOptions options, AGTypeID type);
+
 AG_EXTERN_C_END
 
 AG_ASSUME_NONNULL_END
diff --git a/AG/AttributeGraph.xcframework/macos-arm64e-arm64-x86_64/AttributeGraph.framework/Headers/AGWeakAttribute.h b/AG/AttributeGraph.xcframework/macos-arm64e-arm64-x86_64/AttributeGraph.framework/Headers/AGWeakAttribute.h
index 1bfe921b..0efc34a3 100644
--- a/AG/AttributeGraph.xcframework/macos-arm64e-arm64-x86_64/AttributeGraph.framework/Headers/AGWeakAttribute.h
+++ b/AG/AttributeGraph.xcframework/macos-arm64e-arm64-x86_64/AttributeGraph.framework/Headers/AGWeakAttribute.h
@@ -28,6 +28,10 @@ AG_EXPORT
 AG_REFINED_FOR_SWIFT
 AGAttribute AGWeakAttributeGetAttribute(AGWeakAttribute weakAttribute);
 
+AG_EXPORT
+AG_REFINED_FOR_SWIFT
+AGValue AGGraphGetWeakValue(AGWeakAttribute weakAttribute, AGValueOptions options, AGTypeID type);
+
 AG_EXTERN_C_END
 
 AG_ASSUME_NONNULL_END
diff --git a/AG/Sources/Headers/AGWeakAttribute.h b/AG/Sources/Headers/AGWeakAttribute.h
index 1bfe921b..0efc34a3 100644
--- a/AG/Sources/Headers/AGWeakAttribute.h
+++ b/AG/Sources/Headers/AGWeakAttribute.h
@@ -28,6 +28,10 @@ AG_EXPORT
 AG_REFINED_FOR_SWIFT
 AGAttribute AGWeakAttributeGetAttribute(AGWeakAttribute weakAttribute);
 
+AG_EXPORT
+AG_REFINED_FOR_SWIFT
+AGValue AGGraphGetWeakValue(AGWeakAttribute weakAttribute, AGValueOptions options, AGTypeID type);
+
 AG_EXTERN_C_END
 
 AG_ASSUME_NONNULL_END
diff --git a/Package.swift b/Package.swift
index 12733999..94cede14 100644
--- a/Package.swift
+++ b/Package.swift
@@ -169,7 +169,7 @@ if attributeGraphCondition {
     openGraphShimsTarget.dependencies.append("OpenGraph")
 }
 
-let compatibilityTestCondition = envEnable("OPENGRAPH_COMPATIBILITY_TEST", default: true)
+let compatibilityTestCondition = envEnable("OPENGRAPH_COMPATIBILITY_TEST")
 if compatibilityTestCondition && attributeGraphCondition {
     openGraphCompatibilityTestTarget.dependencies.append("AttributeGraph")
     var swiftSettings: [SwiftSetting] = (openGraphCompatibilityTestTarget.swiftSettings ?? [])
diff --git a/Plugins/UpdateModule/UpdateModuleCommand.swift b/Plugins/UpdateModule/UpdateModuleCommand.swift
index b45ffb3d..e26600b0 100644
--- a/Plugins/UpdateModule/UpdateModuleCommand.swift
+++ b/Plugins/UpdateModule/UpdateModuleCommand.swift
@@ -12,7 +12,7 @@ struct UpdateModuleCommand: CommandPlugin {
     func performCommand(context: PackagePlugin.PluginContext, arguments: [String]) async throws {
         #if compiler(>=6.0) // Skip build on WASI 5.10
         let process = Process()
-        process.executableURL = try context.tool(named: "zsh").url
+        process.executableURL = try context.tool(named: "bash").url
         process.arguments = ["AG/update.sh"]
         try process.run()
         process.waitUntilExit()
diff --git a/Sources/OpenGraph/Attribute/Weak/WeakAttribute.swift b/Sources/OpenGraph/Attribute/Weak/WeakAttribute.swift
index 3e918d1c..eaa99f97 100644
--- a/Sources/OpenGraph/Attribute/Weak/WeakAttribute.swift
+++ b/Sources/OpenGraph/Attribute/Weak/WeakAttribute.swift
@@ -49,7 +49,11 @@ public struct WeakAttribute<Value> {
     }
     
     public var value: Value? {
-        attribute?.value
+        OGGraphGetWeakValue(base, type: Value.self)
+            .value
+            // TO BE CONFIRMED
+            .assumingMemoryBound(to: Value?.self)
+            .pointee
     }
     
     public func changedValue(options: OGValueOptions = []) -> (value: Value, changed: Bool)? {
@@ -62,3 +66,8 @@ extension WeakAttribute: Hashable {}
 extension WeakAttribute: CustomStringConvertible {
     public var description: String { base.description }
 }
+
+@_silgen_name("OGGraphGetWeakValue")
+@inline(__always)
+@inlinable
+func OGGraphGetWeakValue<Value>(_ attribute: AnyWeakAttribute, options: OGValueOptions = [], type: Value.Type = Value.self) -> OGValue
diff --git a/Sources/OpenGraph_SPI/Attribute/OGWeakAttribute.cpp b/Sources/OpenGraph_SPI/Attribute/OGWeakAttribute.cpp
index d45bfc49..686c5474 100644
--- a/Sources/OpenGraph_SPI/Attribute/OGWeakAttribute.cpp
+++ b/Sources/OpenGraph_SPI/Attribute/OGWeakAttribute.cpp
@@ -16,3 +16,8 @@ OGAttribute OGWeakAttributeGetAttribute(OGWeakAttribute weakAttribute) {
     // TODO
     return OGAttributeNil;
 }
+
+OGValue OGGraphGetWeakValue(OGWeakAttribute weakAttribute, OGValueOptions options, OGTypeID type) {
+    // TODO
+    return {nullptr, false};
+}
diff --git a/Sources/OpenGraph_SPI/Attribute/OGWeakAttribute.h b/Sources/OpenGraph_SPI/Attribute/OGWeakAttribute.h
index e19537cc..fce42dd4 100644
--- a/Sources/OpenGraph_SPI/Attribute/OGWeakAttribute.h
+++ b/Sources/OpenGraph_SPI/Attribute/OGWeakAttribute.h
@@ -28,6 +28,10 @@ OG_EXPORT
 OG_REFINED_FOR_SWIFT
 OGAttribute OGWeakAttributeGetAttribute(OGWeakAttribute weakAttribute);
 
+OG_EXPORT
+OG_REFINED_FOR_SWIFT
+OGValue OGGraphGetWeakValue(OGWeakAttribute weakAttribute, OGValueOptions options, OGTypeID type);
+
 OG_EXTERN_C_END
 
 OG_ASSUME_NONNULL_END