export interface SessionTokens {
    input: number;
    output: number;
    reasoning: number;
    cacheRead: number;
    cacheWrite: number;
    total: number;
}
export declare function getDbPath(): string;
export declare function setDbPath(path: string): void;
export declare function getDbLastError(): string;
export declare function getSessionTokens(sessionId: string): SessionTokens;
export declare function getLatestMessageTokens(sessionId: string): {
    input: number;
    output: number;
    total: number;
} | null;
export declare function getContextWindowUsage(sessionId: string, contextLimit: number): {
    usedTokens: number;
    totalTokens: number;
    percent: number;
} | null;
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