export interface TokenBudget {
    /**
     * Tokens reserved for chat messages, including preamble and user input.
     */
    chat: number;
    /**
     * Tokens reserved for context messages.
     */
    context: ChatContextTokenUsage;
}
export interface ChatContextTokenUsage {
    /**
     * Tokens used by user-added context messages.
     */
    user: number;
    /**
     * Tokens used by non-user-specified context messages.
     */
    enhanced: number;
}
export interface TokenUsage extends ChatContextTokenUsage {
    /**
     * Tokens used by the preamble messages.
     */
    preamble: number;
    /**
     * Tokens used by the chat input messages.
     */
    input: number;
}
export type TokenUsageType = ChatTokenUsageType | ContextTokenUsageType;
export type ChatTokenUsageType = 'preamble' | 'input';
export type ContextTokenUsageType = 'user' | 'enhanced';
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