/**
 * Project Memory
 *
 * Persistent memory file (.ralph/memory.md) that survives across separate `ralph run` invocations.
 * The agent can learn project conventions, tool preferences, and patterns over time.
 */
/**
 * Read the project memory file.
 * Returns undefined if no memory exists yet.
 */
export declare function readProjectMemory(cwd: string, dotDir?: string): string | undefined;
/**
 * Append an entry to the project memory file.
 */
export declare function appendProjectMemory(cwd: string, entry: string, dotDir?: string): void;
/**
 * Format memory content as a prompt section for injection into agent context.
 */
export declare function formatMemoryPrompt(memory: string, dotDir?: string): string;
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