/**
 * Anthropic provider expressed as a declarative `WireFormatConfig`.
 *
 * The existing `AnthropicProvider` class stays as the production path until
 * the rest of the registry switches over — both produce the same canonical
 * StreamEvent[]. The per-message logic here is extracted verbatim from
 * `parseAnthropicStream` in `../anthropic.ts`, just split into a stateful
 * `parseStreamEvent` call instead of an async generator loop.
 */
import type { StopReason, Usage } from '@wrongstack/core/types';
type BlockKind = 'text' | 'tool_use' | 'thinking' | 'unknown';
export interface AnthropicStreamState {
    model: string;
    usage: Usage;
    stopReason: StopReason;
    started: boolean;
    stopped: boolean;
    /**
     * Provenance: true once any event supplied an explicit
     * `cache_creation_input_tokens` aggregate. While true, the TTL-split
     * derivation in `mergeAnthropicUsage` must not overwrite
     * `usage.cacheWrite` — the gateway's authoritative aggregate outranks any
     * sum derived from the (possibly partial) ephemeral buckets on later
     * events. Optional so external constructors of this state stay valid;
     * undefined behaves as false.
     */
    cacheWriteFromAggregate?: boolean | undefined;
    blocks: Map<number, {
        kind: BlockKind;
        id?: string | undefined;
        name?: string | undefined;
        chunks: string[];
    }>;
}
export declare const anthropicWireFormat: import("../wire-format.js").WireFormatConfig<AnthropicStreamState>;
export {};
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