Ask your agent to write it up. Paste the prompt. It writes a RECIPE.md: the brief another agent could build your layout from. See Pasture's.
Push it to a public GitHub repo with the topic herdr-layout. Each layout is a folder with layouts/<name>.json, its mods/, the RECIPE.md and a preview.png. One repo can hold several.
It shows up here within the hour, under Community.
Layouts aren't reviewed by Herdr: your agent reads every file before it adds one. Community pictures are screened before they appear.
prompt
Read ~/.config/herdr-app/AGENTS.md, then write a RECIPE.md for my <name> layout the way it describes: a brief another agent could build it from with an empty folder. Put the layout, its mods, the recipe and a screenshot named preview.png in one folder, push it to a public GitHub repo and add the topic herdr-layout.