/**
 * pi-reasonix — Main extension entry point.
 *
 * A pi extension that applies DeepSeek-native optimisations harvested from
 * Reasonix (esengine/DeepSeek-Reasonix):
 *
 *   Pillar 1 — Cache-First Loop (prefix stabilisation → ~94% cache hit)
 *   Pillar 2 — Tool-Call Repair (scavenge, flatten, truncation, storm)
 *   Pillar 3 — Cost Control (turn-end compaction, flash-first)
 *
 * The extension activates automatically when the current model is a
 * DeepSeek model (deepseek-chat, deepseek-reasoner, deepseek-v4, etc.).
 *
 * Detection happens at three levels:
 *   1. Init-time: reads pi's defaultModel from settings.json
 *   2. model_select: fires when user switches model via /model
 *   3. before_provider_request: fires before each API call (fallback)
 */
import type { ExtensionAPI } from "@earendil-works/Pi-coding-agent";
export default function (pi: ExtensionAPI): Promise<void>;