import type { Settings } from "../config/settings.js";
import type { MemoryBackend } from "./types.js";
/**
 * Pick the active memory backend for a Settings instance.
 *
 * Selection rules (single source of truth — every memory consumer routes
 * through this):
 *   - `memory.backend === "hindsight"`  → Hindsight remote memory
 *   - `memory.backend === "mnemopi"`  → local Mnemopi SQLite memory
 *   - `memory.backend === "sharpshooter"` → friction-gated project decision memory
 *   - `memory.backend === "local"`      → local rollout summary pipeline
 *   - everything else                   → no-op
 *
 * `memories.enabled` remains accepted only as a legacy migration input. Once
 * a config is loaded, `memory.backend` is the sole runtime selector.
 */
export declare function resolveMemoryBackend(settings: Settings): Promise<MemoryBackend>;