import Foundation public enum ClaudeOAuthKeychainReadStrategy: String, Sendable, Codable, CaseIterable {    case securityFramework    case securityCLIExperimental} public enum ClaudeOAuthKeychainReadStrategyPreference {    private static let userDefaultsKey = "claudeOAuthKeychainReadStrategy"     #if DEBUG    @TaskLocal private static var taskOverride: ClaudeOAuthKeychainReadStrategy?    #endif     public static func current(userDefaults: UserDefaults = .standard) -> ClaudeOAuthKeychainReadStrategy {        #if DEBUG        if let taskOverride { return taskOverride }        #endif        if let raw = userDefaults.string(forKey: self.userDefaultsKey) {            return ClaudeOAuthKeychainReadStrategy(rawValue: raw) ?? .securityFramework        }        #if DEBUG        if self.isRunningUnderTests,           ProcessInfo.processInfo.environment["CODEXBAR_ALLOW_TEST_KEYCHAIN_ACCESS"] != "1"        {            return .securityFramework        }        #endif        return .securityCLIExperimental    }     #if DEBUG    private static var isRunningUnderTests: Bool {        let processName = ProcessInfo.processInfo.processName        return processName == "swiftpm-testing-helper"            || processName.hasSuffix("PackageTests")            || ProcessInfo.processInfo.environment["XCTestConfigurationFilePath"] != nil    }     public static func withTaskOverrideForTesting<T>(        _ strategy: ClaudeOAuthKeychainReadStrategy?,        operation: () throws -> T) rethrows -> T    {        try self.$taskOverride.withValue(strategy) {            try operation()        }    }     public static func withTaskOverrideForTesting<T>(        _ strategy: ClaudeOAuthKeychainReadStrategy?,        operation: () async throws -> T) async rethrows -> T    {        try await self.$taskOverride.withValue(strategy) {            try await operation()        }    }     public static var currentTaskOverrideForTesting: ClaudeOAuthKeychainReadStrategy? {        self.taskOverride    }    #endif}