anchor.diff:                 Editor                               Operator
                    |                                     |
                    |                                     |
  -        Focus Client                                   |
  +            Focus Client                               |
          /---------------------\                         |
          |  conns     widgets  |                         |
  -       |  sessions           |                         |
  -       |  mux       docs     |                         |
  +       |  fds                |                         |
  +       |  revs      ot state |                         |
          \---------------------/                         |
                    |                                     |
                    |                                     |
  -        Browser  |                             Focus Daemon
  +              Browser                             Focus Server
          /---------------------\                /-----------------\
          | DOM      WebSockets |                | conns     docs  |
  -       | JS       Editor Lib |                |       mux       |
  +       | JS       Editor Lib |                |      descs      |
          \---------------------/                \-----------------/
                    |                                     |
                    |                                     |
  
positive.code: 
  [[A-1]]
  .A-1: Latency
  Vaporpad takes more than 1 second to respond to a request.
  
  [[A-2]]
  .A-2: Durability
  Vaporpad loses history.
  
  [[A-3]]
  .A-3: Availability
  Vaporpad gets DoSed.
  
  [[A-4]]
  .A-4: Confusion
  Vaporpad garbles a pad.
  
  === System Limitations
  
  
negative.code: 
  [[PR-1]]
  .PR-1: Client-Server Architecture
  Vaporpad will use a client-server architecture. ↑[<<N-O-11>>, <<N-I-2>>]
  
  [[PR-2]]
  .PR-2: Reference Code + Protocol
  Vaporpad includes reference client code, reference server code, and a documented protocol spoken between them. ↑[<<N-I-2>>]
  
  [[PR-3]]
  .PR-3: Operational Transformation Theory
  