type CollapseStats = { collapsedSpans: number stagedSpans: number health: { totalErrors: number totalEmptySpawns: number emptySpawnWarningEmitted: boolean } } const EMPTY_STATS: CollapseStats = { collapsedSpans: 0, stagedSpans: 0, health: { totalErrors: 0, totalEmptySpawns: 0, emptySpawnWarningEmitted: false, }, } export function getStats(): CollapseStats { return EMPTY_STATS } export function subscribe(_listener: () => void): () => void { return () => {} }