/**
 * Plan Mode Extension
 *
 * Read-only exploration mode for safe code analysis.
 * When enabled, only read-only tools are available.
 *
 * Features:
 * - /plan command or Ctrl+T to toggle
 * - Mode changes are persisted as invisible messages in session
 */
import type { ExtensionAPI } from "@mariozechner/pi-coding-agent";
export default function planModeExtension(pi: ExtensionAPI): void;
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