import type { ITestResult, IPlanLine, ISnapshotData, IErrorBlock, ITestEvent } from './protocol.types.js';
/**
 * ProtocolEmitter generates Protocol V2 messages
 * This class is used by tapbundle to emit test results in the new protocol format
 */
export declare class ProtocolEmitter {
    /**
     * Emit protocol version header
     */
    emitProtocolHeader(): string;
    /**
     * Emit TAP version line
     */
    emitTapVersion(version?: number): string;
    /**
     * Emit test plan
     */
    emitPlan(plan: IPlanLine): string;
    /**
     * Emit a test result
     */
    emitTest(result: ITestResult): string[];
    /**
     * Emit a comment line
     */
    emitComment(comment: string): string;
    /**
     * Emit bailout
     */
    emitBailout(reason: string): string;
    /**
     * Emit snapshot data
     */
    emitSnapshot(snapshot: ISnapshotData): string[];
    /**
     * Emit error block
     */
    emitError(error: IErrorBlock): string[];
    /**
     * Emit test event
     */
    emitEvent(event: ITestEvent): string;
    /**
     * Check if metadata should be inline
     */
    private shouldUseInlineMetadata;
    /**
     * Create inline metadata string
     */
    private createInlineMetadata;
    /**
     * Create block metadata lines
     */
    private createBlockMetadata;
}