Help me add 5e Lair Actions

[cas206]

Any suggestions on how to add lair actions using the default 5e layout? The simplest would be to add action snippets to each creature that gets lair actions.

Monster manual has them separated from monster stat blocks and they can apply to a group of creatures (i.e. dragons). So I think a better solution is a snippet linking to an article about a specific type of creatures layer actions with action details. Where would you place said article? Layout suggestions?

Which would you do? Leaning toward the first (KISS) even though some repetition will be required.