/**
 * [WHO]: storeInsight(), loadRecentInsights(), buildInsightInjection(), projectKeyFromCwd() — project-scoped nanomem insight storage and injection
 * [FROM]: Depends on node:fs, node:path, node:os, packages/mem-core/src/store and packages/mem-core/src/types for validated persistent memory entries
 * [TO]: Consumed by ./index.ts (idle-think extension entry)
 * [HERE]: extensions/builtin/idle-think/insights.ts - persistent insight storage via nanomem knowledge.json
 *
 * Insights are stored in nanomem's knowledge.json with tag "idle-think".
 * This keeps persistence compatible with nanomem's entry migration and
 * avoids injecting notes from unrelated projects.
 */
import type { MemoryEntry } from "../../../packages/mem-core/src/types.js";
export declare function projectKeyFromCwd(cwd: string): string;
/**
 * Store an insight as a nanomem knowledge entry.
 * Entry is tagged "idle-think" for traceability and filtering.
 */
export declare function storeInsight(insightText: string, project: string): Promise<void>;
/**
 * Load recent idle-think insights from nanomem.
 * Returns the last `count` entries, newest first.
 */
export declare function loadRecentInsights(count?: number, project?: string): Promise<MemoryEntry[]>;
/**
 * Build a system prompt injection for before_agent_start.
 * Reads from nanomem (persistent), not session state.
 */
export declare function buildInsightInjection(project?: string): Promise<string | undefined>;