/**
 * Credential file loader.
 *
 * Reads credentials written by the Falcon CLI's `neubird login` command.
 * Schema matches Falcon's internal/config/credentials.go (ace_creds, access_token,
 * raven_url, expires_at). Path resolution matches Falcon's internal/config/dir.go:
 * XDG_CONFIG_HOME (if set) or $HOME/.config, then /neubird/neubird.json
 * — with profile variants at /neubird/neubird-<profile>.json.
 */
export interface CredentialFile {
    /** Decoded from ace_creds when present. */
    email?: string;
    /** Decoded from ace_creds when present. */
    password?: string;
    /** Raw JWT from the file's access_token field. */
    accessToken?: string;
    /** From the file's raven_url field. */
    baseUrl?: string;
    /** From the file's expires_at field (unix seconds). */
    expiresAt?: number;
    /** Absolute path of the file that was read. */
    path: string;
}
/**
 * Resolve the NeuBird config directory.
 *
 * Mirrors Falcon's internal/config/dir.go so this server finds the file
 * `neubird login` writes on every platform:
 *   - Windows: %APPDATA%\neubird\   (Go's os.UserConfigDir())
 *   - Unix:    $XDG_CONFIG_HOME/neubird/  or  $HOME/.config/neubird/
 *
 * Returns null if no home/appdata directory can be determined.
 */
export declare function configDir(): string | null;
/**
 * Resolve the credential file path for the given profile, falling back to the
 * unnamed (default) profile file if a profile-specific file does not exist.
 * Returns null if no file is found or the config directory is unknown.
 */
export declare function resolveCredentialPath(profile?: string): string | null;
/**
 * Load and parse the credentials file.
 *
 * Throws when a file exists but cannot be parsed — the caller should surface
 * this rather than silently falling back, since a corrupted file almost
 * certainly needs human attention.
 *
 * Returns null when no file is found (expected case on first run).
 */
export declare function loadCredentialFile(profile?: string): CredentialFile | null;