diff --git a/skills/creating-tasks-through-lunatask/SKILL.md b/skills/creating-tasks-through-lunatask/SKILL.md
index f6c000705e6980557cf6c60cd80ed79a885557e9..5fa3dd19ce21e812c4a2a0681c6388213e834871 100644
--- a/skills/creating-tasks-through-lunatask/SKILL.md
+++ b/skills/creating-tasks-through-lunatask/SKILL.md
@@ -35,6 +35,10 @@ Examples:
 - `Implement ACP event sink in Crush`
 - `Investigate why lune habit track silently fails`
 
+### Area and goal
+
+Area is required. Goal is **optional** — only set one if the user specifies it or the task clearly belongs to an existing goal. Don't guess. The goal cannot be unset through the CLI after creation, so it's better to omit than to get it wrong.
+
 ### Status
 
 New tasks usually get status `later`. When beginning work on a task, update according to workflow, then completed when done (or use `done` subcommand shortcut).