/**
 * context — tiered memory context loader, inspired by Hermes Agent's
 * OpenViking memory provider (L0 → L1 → L2 progressive loading).
 *
 * Three tiers trade latency for richness:
 *
 *   L0  ~100 tokens  Top-3 memories by salience × FSRS retrievability.
 *                    Names + first 80 chars of definition only.
 *                    Designed to be injected into every system prompt with
 *                    near-zero latency (no LLM call, one vector search).
 *
 *   L1  ~2k tokens   Semantic top-15 with full definitions, tags, and
 *                    immediate graph edges (one hop). Suitable for the
 *                    working memory section of a system prompt or a
 *                    context-window refresh mid-conversation.
 *
 *   L2  full         Multi-anchor retrieval across 4 query reformulations
 *                    with Borda-count consensus, spreading activation (2
 *                    hops), and full memory metadata including provenance
 *                    and FSRS state. Use when you need the richest possible
 *                    recall and can tolerate extra latency.
 *
 * All tiers use HyDE query expansion by default (disable with hyde: false).
 * Results are always filtered to faded=false and sorted by composite score.
 */
import type { ToolDefinition } from '../mcp/tools.js';
export declare const contextTool: ToolDefinition;
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