diff --git a/languages/rs-ownership.md b/languages/rs-ownership.md
index dd5f708..9e50307 100644
--- a/languages/rs-ownership.md
+++ b/languages/rs-ownership.md
@@ -1,5 +1,8 @@
 # Rust Ownership — Derived Application
 
+**TL;DR** — Atelier — first-principles docs-as-code engineering framework. This file explains how to stand it up and who to contact; the machinery detail stays lower under Details.
+
+
 > Applies Atelier's domain principles to Rust's ownership model specifically. Rust's distinctive strength (Send/Sync, lifetimes, borrowing) earns a dedicated ownership doc rather than an `rs-types.md`.
 > Derives from `domains/` docs; introduces no new P-rules (D-063).
 > See `languages/rust.md` for the language first-principles stub.