diff --git a/docs/offscale-plugin.md b/docs/offscale-plugin.md
index c09aba57..75eb9075 100644
--- a/docs/offscale-plugin.md
+++ b/docs/offscale-plugin.md
@@ -6,6 +6,11 @@ plugin system. Correct it in place; it is meant to be edited, not archived.
 Offscale is Headscale extracted into a plugin. It is the pilot: chosen because it is a genuine vertical
 slice (schema + backend router + sidecar + frontend screen + capabilities) without being pathological.
 
+**The name is not a rename.** Offscale is Headscale _plus the Companion_ — an API and UI that ship beside
+the Headscale server and add what Headscale itself does not do, the invite flow being the first of them.
+Calling it Headscale would undersell it and calling it a fork would be wrong: the server underneath is
+stock. The distinct name marks a distinct product, not a badge on someone else's.
+
 Related, and older: `sidecar-app-store.md` is the origin design and is largely implemented despite its
 "Nothing implemented" header. `sidecar-topology.md` is where the runtime shape was going.