Improved Signs 
This mod is only for Fabric/Quilt Servers(or Single-Player) and requires Fabric API or Quilted Fabric API
Features
- Sign Editor: Edit placed signs by shift(sneak) + right-click with an empty hand
- Sign & Item Frame Passthrough: Access chests, shulker boxes, barrels, etc behind signs by right-clicking the sign
- Interact with Item Frames normally by shift(sneak) + right-click
- Signs Retain - Breaking a sign will retain that sign's text, color and glowing. Put the sign in a crafting window to reset it
- Seeing the saved text in your inventory requires installing either this mod or Inspecio on the client
- Sign Copy - Right-clicking a sign with a sign(or stack of signs) in your hand will copy the text to the held signs
- Invisible Item Frames - Use Amethyst Shards to turn item frames invisible
- You can configure it to use Glass Panes instead
- Stop Sign editor from opening when placing new signs
- Flan compatibility for passthrough/editing
- EDITSIGN permission for allowing/disallowing editing of placed signs
- All features are configurable in
config/improvedsigns.json5
Shout-outs
- Original Sign Retain functionality merged from umollu's Sign Retain
- Girafi for the idea for Passthrough Signs. Find their original mod for Forge here
- Jarva for contributing several features to the mod, including Flan support
- Everyone else that has contributed