import Dispatchimport Foundation #if os(macOS)import Security enum ClaudeOAuthKeychainQueryTiming {    static func copyMatching(_ query: [String: Any]) -> (status: OSStatus, result: AnyObject?, durationMs: Double) {        var result: AnyObject?        let startedAtNs = DispatchTime.now().uptimeNanoseconds        let status = SecItemCopyMatching(query as CFDictionary, &result)        let durationMs = Double(DispatchTime.now().uptimeNanoseconds - startedAtNs) / 1_000_000.0        return (status, result, durationMs)    }     static func backoffIfSlowNoUIQuery(_ durationMs: Double, _ service: String, _ log: CodexBarLogger) -> Bool {        // Intentionally no longer treats "slow" no-UI Keychain queries as a denial. Some systems can have        // non-deterministic timing characteristics that would make this backoff too aggressive and surprising.        //        // Keep this hook so call sites can cheaply log slow queries during debugging without changing behavior.        guard ProviderInteractionContext.current == .background, durationMs > 1000 else { return false }        log.debug(            "Claude keychain no-UI query was slow",            metadata: [                "service": service,                "duration_ms": String(format: "%.2f", durationMs),            ])        return false    }}#endif