import type { ConfigFile, ConfigDefaults } from './types.js';
/**
 * Read the configuration file.
 * @throws {CliError} When config file exists but cannot be parsed.
 */
export declare const readConfig: () => ConfigFile;
/**
 * Write the configuration file atomically.
 * Uses a temp file + rename to prevent corruption.
 */
export declare const writeConfig: (config: ConfigFile) => void;
/**
 * Get the API key from config or environment.
 * Environment variable LINEAR_API_KEY takes precedence.
 */
export declare const getApiKey: () => string | undefined;
/**
 * Get the API key or throw if not configured.
 * @throws {CliError} When no API key is configured (NOT_AUTHENTICATED).
 */
export declare const requireApiKey: () => string;
/**
 * Save the API key to config with secure permissions.
 */
export declare const saveApiKey: (apiKey: string) => void;
/**
 * Remove the API key from config.
 */
export declare const removeApiKey: () => void;
/**
 * Get the config file path (for display purposes).
 */
export declare const getConfigPath: () => string;
/**
 * Get defaults from config, with migration from legacy defaultTeamId.
 */
export declare const getDefaults: () => ConfigDefaults;
/**
 * Get the default team ID from config.
 * Returns undefined if not configured.
 */
export declare const getDefaultTeamId: () => string | undefined;
/**
 * Get the default team key from config.
 * Returns undefined if not configured.
 */
export declare const getDefaultTeamKey: () => string | undefined;
/**
 * Set a default configuration value.
 */
export declare const setDefault: (key: keyof ConfigDefaults, value: string | undefined) => void;
/**
 * Remove a default configuration value.
 */
export declare const removeDefault: (key: keyof ConfigDefaults) => void;
/**
 * Valid configuration keys that can be set.
 */
export declare const CONFIG_KEYS: readonly ["default-team-id", "default-team-key"];
export type ConfigKey = (typeof CONFIG_KEYS)[number];
/**
 * Map config key to internal defaults key.
 */
export declare const configKeyToDefaultsKey: (key: ConfigKey) => keyof ConfigDefaults;
/**
 * Check if a key is a valid config key.
 */
export declare const isValidConfigKey: (key: string) => key is ConfigKey;