Panewright 0.6.27

Fixed

• The accessibility-debris problem is fixed at both ends (the root of
  the day's lag, orphaned-at-startup apps, and slow menus). Release builds
  of the engine intercepted no signals, so every ordinary restart killed it
  without removing a single AXObserver — depositing debris inside every
  subscribed app, accumulating until the machine's whole accessibility
  layer crawled. The engine now unsubscribes cleanly on SIGTERM, and app
  registration is time-bounded so even a poisoned accessibility layer
  can't wedge the command server. Measured on the debris-laden machine:
  engine answers went from 10.2 seconds to 15 milliseconds. (Existing
  debris in long-running apps clears when they — or the Mac — restart.)