Can't compose user terminal resize logic with Reline's terminal resize logic

[fractaledmind]

Description

I am building a CLI that uses Reline. In this CLI, I render a box at the top of the screen before the readline input:

 ┌──────────────────────────────────────────────────┐
 │                                                  │
 │                                                  │
 └──────────────────────────────────────────────────┘

   > |

I want to ensure that this box looks decent in various terminal window sizes. I am trying to avoid something like this:

 ┌───────────────────────────────────────────────
───┐
 │                                              
    │
 │                                              
    │
 └───────────────────────────────────────────────
───┘

   > |

In order to ensure the box stays decent, I need to react to the terminal window being resized; this means that I need to trap the WINCH signal.

Unfortunately, Reline traps that signal and provides no way for me run my own resize code as well. I expect to be able, in some way, to define my own resize hook that composes with Reline's resize hook.