import type { ChatMessage, NativeToolCall, ReasoningArtifact, ReasoningBlock } from "../types.js";
import { collapseOversizedToolHistory, MAX_RETAINED_COMPLETED_TOOL_ARGUMENT_CHARS, PROTOCOL_PLACEHOLDER_MARKER } from "./tool-history-projection.js";
export { collapseOversizedToolHistory, MAX_RETAINED_COMPLETED_TOOL_ARGUMENT_CHARS, PROTOCOL_PLACEHOLDER_MARKER, };
export declare function toolCallIdsInHistory(messages: readonly ChatMessage[]): Set<string>;
export declare function ensureUniqueToolCallIds(calls: readonly NativeToolCall[], reservedIds?: ReadonlySet<string>): NativeToolCall[];
export declare function slimNativeToolCallsForHistory(toolCalls: readonly NativeToolCall[]): NativeToolCall[];
export declare function appendAssistantWithTools(messages: ChatMessage[], text: string, toolCalls: NativeToolCall[], reasoningBlock?: ReasoningBlock | undefined, reasoningArtifacts?: readonly ReasoningArtifact[] | undefined): void;
export declare function appendToolResult(messages: ChatMessage[], toolCallId: string, content: string, name?: string, ok?: boolean): void;
export declare function hasOrphanToolMessages(messages: ChatMessage[]): boolean;
export declare function missingToolResultIds(messages: ChatMessage[]): string[];
export declare function fillMissingToolResults(messages: ChatMessage[], toolCalls: NativeToolCall[], reason?: string): number;
export declare function allToolCallsHaveResults(messages: ChatMessage[]): boolean;
export declare function expandKeepStartForToolPairs(messages: ChatMessage[], keepStart: number): number;
export declare function validateToolProtocol(messages: readonly ChatMessage[]): string[];
export declare function assertValidToolProtocol(messages: readonly ChatMessage[]): void;
export declare function formatProtocolPlaceholder(name: string, id: string): string;
export declare function repairToolProtocol(messages: ChatMessage[]): number;
export declare function projectToolHistory(messages: readonly ChatMessage[]): {
    messages: ChatMessage[];
    changed: boolean;
    repairs: number;
};