/**
 * Lightweight savings receipts for caveman compression (and related prompt
 * shaping). No /healthz parity with transponder — just process counters and
 * an opt-in log line under CURSOR_OPENCODE_SAVINGS=1 (also fires when
 * CURSOR_OPENCODE_DEBUG_CODEMODE=1). Lines go to the plugin log file
 * (see src/log.ts), not stderr/TUI.
 */
export interface SavingsReceipts {
    /** Bytes removed from client-tool description prose (code-description). */
    cavemanSaved: number;
    /** Bytes removed from the OpenCode-supplied system prompt (proxy Run build). */
    cavemanSystemSaved: number;
    /** Number of compressProse calls that saved >0 bytes (tools). */
    cavemanToolCalls: number;
    /** Number of compressProse calls that saved >0 bytes (system). */
    cavemanSystemCalls: number;
}
export declare function getSavingsReceipts(): SavingsReceipts;
export declare function resetSavingsReceipts(): void;
/** Record tool-description prose savings (code-description path). */
export declare function noteCavemanToolSavings(savedBytes: number): void;
/** Record system-prompt prose savings (proxy Run build). */
export declare function noteCavemanSystemSavings(savedBytes: number): void;
/**
 * Emit a one-line summary receipt (call at turn boundaries or from tests).
 * No-op unless SAVINGS/DEBUG_CODEMODE is on.
 */
export declare function logSavingsReceipt(label?: string, env?: Record<string, string | undefined>): void;