/**
 * Pi Statusline Extension
 *
 * Custom footer showing model, cost, context usage, git branch, and lines changed.
 * Also writes tmux status files (working/waiting/idle) for tmux integration.
 *
 * Tmux status integration:
 *   - Writes state to ~/.cache/pi-status/<session>.status
 *   - States: working, done, idle
 *
 * Custom footer showing:
 *   - Model name with icon
 *   - Session cost
 *   - Lines added/removed
 *   - Context window usage bar
 *   - Git branch
 */
import type { ExtensionAPI } from '@earendil-works/pi-coding-agent';
export default function (pi: ExtensionAPI): void;