import type { OpenAIMessage } from './langchain-adapter';
import type { ChatCompletionTool, ChatCompletionToolChoice } from './provider';
import type { ChatAnthropic } from '@langchain/anthropic';
import type { BaseMessage } from '@langchain/core/messages';
export default class AnthropicAdapter {
    static convertMessages(messages: OpenAIMessage[]): BaseMessage[];
    /** Cast `as string` works around LangChain's AnthropicToolChoice missing `disable_parallel_tool_use`. */
    static bindTools(model: ChatAnthropic, tools: ChatCompletionTool[], { toolChoice, parallelToolCalls, }: {
        toolChoice?: ChatCompletionToolChoice;
        parallelToolCalls?: boolean;
    }): ChatAnthropic;
    /**
     * Convert OpenAI tool_choice to Anthropic format, applying parallel tool restriction.
     *
     * Converts to LangChain format first, then applies `disable_parallel_tool_use`
     * when `parallelToolCalls` is explicitly `false` (not just falsy — `undefined` means
     * no restriction).
     */
    private static convertToolChoice;
    /**
     * Merge all system messages into a single one placed first.
     *
     * Anthropic only allows a single system message at the beginning of the conversation.
     */
    private static mergeSystemMessages;
}
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