export declare const OTTO_PROTOCOL_VERSION = 1;
export declare const OTTO_PROTOCOL_MIN_VERSION = 1;
export declare const OTTO_PROTOCOL_MAX_VERSION = 1;
export declare const OTTO_CLIENT_CAPABILITIES: readonly ["projects.list", "remote.owner-session", "remote.upgrade.stage", "remote.daemon.restart"];
export type CompatibilityStatus = 'compatible' | 'limited-legacy' | 'host-too-old' | 'client-too-old' | 'unknown-legacy';
export interface ProtocolDescriptor {
    version?: number;
    minVersion?: number;
    maxVersion?: number;
    capabilities?: readonly string[];
}
export interface CompatibilityResult {
    status: CompatibilityStatus;
    missingCapabilities: string[];
    negotiatedProtocol: number | null;
}
/** Evaluates host/client wire compatibility without consulting product semver. */
export declare function evaluateCompatibility(host: ProtocolDescriptor | null | undefined, client?: ProtocolDescriptor, requiredCapabilities?: readonly string[]): CompatibilityResult;
export interface ClientIdentity {
    name: string;
    version: string;
}
/** Builds first-party identity headers for generated SDK requests. */
export declare function clientIdentityHeaders(identity: ClientIdentity): Record<string, string>;
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