/**
 * Capture settings the browser extension is allowed to change.
 *
 * This is an explicit allowlist with clamped ranges. The previous
 * implementation spread an arbitrary request body over its global settings
 * object, which let any caller repoint the screenshot directory or set an
 * unbounded log limit and exhaust memory.
 */
export interface CaptureSettings {
    /** Maximum entries retained per log category. */
    logLimit: number;
    /** Character budget for a single query response. */
    queryLimit: number;
    /** Maximum length of any individual captured string. */
    stringSizeLimit: number;
    /** Maximum serialised size of a single captured entry. */
    maxLogSize: number;
    /**
     * Byte budget for a screenshot. The browser degrades format and scale until
     * the capture fits, so an image never blows the client's context window or
     * overruns the transport's read buffer.
     */
    screenshotMaxBytes: number;
    showRequestHeaders: boolean;
    showResponseHeaders: boolean;
}
export declare const LIMITS: {
    readonly logLimit: {
        readonly min: 1;
        readonly max: 5000;
        readonly default: 500;
    };
    readonly queryLimit: {
        readonly min: 1000;
        readonly max: 500000;
        readonly default: 30000;
    };
    readonly stringSizeLimit: {
        readonly min: 100;
        readonly max: 100000;
        readonly default: 500;
    };
    readonly maxLogSize: {
        readonly min: 1000;
        readonly max: 1000000;
        readonly default: 20000;
    };
    readonly screenshotMaxBytes: {
        readonly min: 50000;
        readonly max: 9000000;
        readonly default: 3000000;
    };
};
export declare const DEFAULT_SETTINGS: Readonly<CaptureSettings>;
/**
 * Produces a new settings object from `current` plus whatever of `patch` is
 * recognised. Unknown keys, wrong types and out-of-range values are discarded
 * rather than rejected, so a well-meaning client with a stale field still works.
 */
export declare function mergeSettings(current: Readonly<CaptureSettings>, patch: unknown): CaptureSettings;