https://gitlab.synchro.net/main/sbbs/-/commit/4af502dcf316b308bd5de71a  
  Modified Files:  
   src/doors/syncretro/M2_INPUT.md M3_MULTICORE.md M4_AUDIO.md  
  Log Message:  
  syncretro: record what the milestone docs' deferred items became  
    
  M2_INPUT.md, M3_MULTICORE.md and M4_AUDIO.md are the design record the  
  door's code cites by section for its defaults, its measurements and its  
  rejected alternatives, so their "Deferred, with reasons" tails get read  
  as current. Several of those items have since shipped while still  
  reading as open work:  
    
  - the volume hotkey (M4) -- '+'/'-' walking a 0..100 percent  
  - the CP437 text tier (M2) -- charset taken from the client, F4 cycles  
  - core options and save states (M3) -- the option store, and suspend as  
    an automatic per-user snapshot  
  - the NES install (M3), which had no cartridges and no xtrn.ini entry  
  - the Intellivision keypad's end-to-end semantics (M2), blocked at the  
    time on a BIOS the install now carries  
    
  Each item keeps its original reasoning and gains what actually happened,  
  including where that differs from the plan: save-state hotkeys and a save  
  UI are still open, and a descriptor-derived per-game legend was answered  
  from the other end by games.ini, for the console that sends no  
  descriptors at all. Two section cross-references corrected in passing.  
    
  Co-Authored-By: Claude Opus 5 (1M context)   
  --- SBBSecho 3.37-Linux  
   * Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)