import Foundation public enum GroqSettingsReader {    public static let apiKeyEnvironmentKey = "GROQ_API_KEY"    public static let apiURLEnvironmentKey = "GROQ_API_URL"     public static func apiKey(        environment: [String: String] = ProcessInfo.processInfo.environment) -> String?    {        self.cleaned(environment[self.apiKeyEnvironmentKey])    }     public static func apiURL(        environment: [String: String] = ProcessInfo.processInfo.environment) -> URL    {        if let override = self.validAPIURL(environment: environment) {            return override        }        return URL(string: "https://api.groq.com/v1")!    }     public static func validateEndpointOverrides(        environment: [String: String] = ProcessInfo.processInfo.environment) throws    {        guard let raw = self.cleaned(environment[self.apiURLEnvironmentKey]) else { return }        guard ProviderEndpointOverrideValidator.normalizedHTTPSURL(from: raw) == nil else { return }        throw GroqSettingsError.invalidEndpointOverride(self.apiURLEnvironmentKey)    }     static func cleaned(_ raw: String?) -> String? {        guard var value = raw?.trimmingCharacters(in: .whitespacesAndNewlines), !value.isEmpty else {            return nil        }        if (value.hasPrefix("\"") && value.hasSuffix("\"")) ||            (value.hasPrefix("'") && value.hasSuffix("'"))        {            value = String(value.dropFirst().dropLast())        }        value = value.trimmingCharacters(in: .whitespacesAndNewlines)        return value.isEmpty ? nil : value    }     private static func validAPIURL(environment: [String: String]) -> URL? {        guard let raw = self.cleaned(environment[self.apiURLEnvironmentKey]) else { return nil }        return ProviderEndpointOverrideValidator.normalizedHTTPSURL(from: raw)    }} public enum GroqSettingsError: LocalizedError, Sendable, Equatable {    case invalidEndpointOverride(String)     public var errorDescription: String? {        switch self {        case let .invalidEndpointOverride(key):            "Groq endpoint override \(key) must use HTTPS or a bare host."        }    }}