import type { CompletionRequest, CompletionResult, CompletionStreamEvent, TransportId } from './types.js';
export interface NormalizedToolDefinition {
    name: string;
    description?: string;
    parameters?: Record<string, unknown>;
}
export interface NormalizedToolCall {
    id: string;
    name: string;
    arguments: string | Record<string, unknown>;
}
export interface NormalizedCostRecord {
    inputTokens: number;
    outputTokens: number;
    cacheReadTokens?: number;
    cacheWriteTokens?: number;
    model?: string;
    provider?: string;
}
export interface CodecCapabilities {
    supportsTools: boolean;
    supportsStreaming: boolean;
    supportsTokenCounting: boolean;
    costTracking: boolean;
    toolSchemaFormat: 'openai' | 'anthropic' | 'google' | 'none';
}
export interface TransportCodec {
    readonly transportId: TransportId;
    readonly capabilities: CodecCapabilities;
    decodeRequest(body: Record<string, unknown>): CompletionRequest;
    encodeResult(result: CompletionResult): unknown;
    encodeStreamChunk(event: CompletionStreamEvent): string;
    normalizeTools?(tools: unknown[]): NormalizedToolDefinition[];
    denormalizeTools?(tools: NormalizedToolDefinition[]): unknown[];
    extractCostRecord?(result: CompletionResult): NormalizedCostRecord | undefined;
}