/**
 * Updates the `usageTier` field in the hublaunch config file in-place.
 * Replaces an existing value or inserts the key before the last closing brace.
 * Returns true if the file was written successfully, false otherwise.
 */
export declare function updateUsageTierInConfig(projectRoot: string, tier: 'free' | 'pro'): boolean;
/**
 * Set the `saveCredentials` boolean in the hublaunch config file in-place.
 * Replaces an existing value (active or commented, preserving any trailing
 * comment) or inserts a fully-documented line before the last closing brace.
 * Returns true on success, false when the file is missing or unwritable.
 */
export declare function updateSaveCredentialsInConfig(projectRoot: string, value: boolean): boolean;
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