/**
 * Turn Timer Extension
 *
 * Shows how long a complete run took — from the moment you send a message
 * until the agent settles and is awaiting your next message. This spans
 * every LLM response, tool call, and tool result in the run, so a turn
 * with multiple tool-call rounds still produces a single timer row.
 *
 * Uses agent_start/agent_settled and renders the result as a custom
 * transcript entry that does NOT participate in LLM context, so it never
 * pollutes the conversation and /copy (which reads only assistant message
 * text) never picks it up.
 */
import type { ExtensionAPI } from '@earendil-works/pi-coding-agent';
export default function turnTimer(pi: ExtensionAPI): void;