/**
 * Get the path to agentcore/.env.local.
 * @param configRoot - Optional config root, defaults to finding it automatically
 */
export declare function getEnvPath(configRoot?: string): string;
/**
 * Read agentcore/.env.local.
 */
export declare function readEnvFile(configRoot?: string): Promise<Record<string, string>>;
/**
 * Get a single value from agentcore/.env.local.
 */
export declare function getEnvVar(key: string, configRoot?: string): Promise<string | undefined>;
/**
 * Write to agentcore/.env.local. Merges with existing values by default.
 */
export declare function writeEnvFile(updates: Record<string, string>, configRoot?: string, merge?: boolean): Promise<void>;
/**
 * Set a single value in agentcore/.env.local.
 */
export declare function setEnvVar(key: string, value: string, configRoot?: string): Promise<void>;
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