/** Hermes built-in caps when config.yaml is absent. */
export declare const MEMORY_CHAR_LIMIT = 2200;
export declare const USER_CHAR_LIMIT = 1375;
/** Internal markers — skip re-append when already present. */
export declare const INJECTION_MARKER_BEGIN = "<!-- pi-using-hermes-memories:begin -->";
export declare const INJECTION_MARKER_END = "<!-- pi-using-hermes-memories:end -->";
export type MemorySnapshot = {
    memoryText: string | null;
    userText: string | null;
    memoryPath: string;
    userPath: string;
    warnings: string[];
    /** Pre-rendered Hermes-shaped blocks (stable for the session). */
    rendered: string;
};
export type RenderSnapshotInput = {
    memoryText: string | null;
    userText: string | null;
    memoryLimit?: number;
    userLimit?: number;
};
export type SnapshotLimits = {
    memoryLimit?: number;
    userLimit?: number;
};
/**
 * Short Hermes-compatible guidance appended before the snapshot blocks.
 * Describes how the injected memories are used (tool CRUD lands later).
 */
export declare function memoryGuidanceText(): string;
export declare function renderSnapshotBlock(input: RenderSnapshotInput): string;
/** Load MEMORY.md / USER.md once for the session (call from session_start). */
export declare function loadMemorySnapshot(memoryDirectory: string, limits?: SnapshotLimits): MemorySnapshot;
/**
 * Append guidance + frozen snapshot to Pi's system prompt.
 * Preserves `systemPrompt` as a byte-for-byte prefix. Skips if marker present.
 */
export declare function appendMemoryToSystemPrompt(systemPrompt: string, snapshot: MemorySnapshot, guidance?: string): string;
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