Function evictOne

design/src/daemon.ts:155–171

()

// LRU eviction. Prefers `done` boards as victims so an active regen doesn't
// vanish mid-flight. Returns the evicted id, or null when the map fits.
function evictOne(): string | null {
  if (boards.size <= MAX_BOARDS) return null;
  let oldestDone: Board | null = null;
  let oldestAny: Board | null = null;
  for (const b of boards.values()) {
    if (b.state === "done") {
      if (!oldestDone || b.lastTouched < oldestDone.lastTouched) oldestDone = b;
    }
    if (!oldestAny || b.lastTouched < oldestAny.lastTouched) oldestAny = b;
  }
  const victim = oldestDone || oldestAny;
  if (!victim) return null;
  boards.delete(victim.id);
  boardMutex.delete(victim.id);
  dlog(`evicted board ${victim.id} state=${victim.state}`);
  return victim.id;
}

function evictUntilUnderCap(): void {
  while (boards.size > MAX_BOARDS) {