Three layers:

  v86 — src/vmware.js gains the legacy text-clipboard backdoor commands
  (GETSELLENGTH/GETNEXTPIECE/SETSELLENGTH/SETNEXTPIECE, 6–9). The host
  stages bytes via the vmware-clipboard-host bus event; the guest pushes
  via 8/9 and the device emits vmware-clipboard-guest when the buffer
  fills. Same wire protocol as open-vm-tools' pre-RPC copy/paste.
  Committed on the windows95-base fork branch; libv86.js rebuilt here.

  renderer — src/renderer/clipboard.ts polls Electron's clipboard (no
  change event exists), translates host UTF-8/LF ↔ guest CP-1252/CRLF,
  and bounces bytes through the two bus events. Echo-suppressed so a
  value we just wrote does not come back as a change.

  guest — guest-tools/agent/W95TOOLS.EXE is a 22 KB hidden-window agent
  that joins the Win32 clipboard-viewer chain (push-on-copy) and polls
  the backdoor on a 250 ms timer (pull-from-host). Win9x runs ring-3
  with the I/O bitmap wide open, so a plain IN EAX,DX from a user
  process reaches the port — no driver needed. Named for growth: time
  sync and host-initiated shutdown will live here too. Built with Open
  Watcom v2 inside Docker (Makefile + Dockerfile alongside the source);
  subsystem 4.0, no msvcrt, runs on Win95 RTM.

Install: copy \\HOST\TOOLS\agent\W95TOOLS.EXE into the guest and drop a
shortcut in StartUp. Text only, 64 KB cap.