The « Micro » editor seems to have a nice plugin for Crystal

[serge-hulne]

Micro :

• https://youtu.be/kqCQLyrEZww
• https://www.cloud savvy it.com/2204/how-to-use-micro-the-better-alternative-to-nano/
• GitHub - zyedidia/micro: A modern and intuitive terminal-based text editor

The Crystal plugin for Micro:

• GitHub - ColinRioux/micro-crystal: Various crystal tools for micro.
• What the plugin provides: micro-crystal/crystal-plugin.md at master · ColinRioux/micro-crystal · GitHub