diff --git a/ephapax-linear/README.md b/ephapax-linear/README.md
index fed1d5b..fbcc037 100644
--- a/ephapax-linear/README.md
+++ b/ephapax-linear/README.md
@@ -23,7 +23,16 @@
 
 Standalone linear/affine discipline checker for the Ephapax language.
 
-## Dual Grammars
+> **Naming note.** This crate is called `ephapax-linear` for historical
+> reasons; it implements **both** L2 modalities (Linear and Affine). The
+> two are not different languages — they are two admissible-derivation
+> regimes over the same syntax and semantics. See
+> [`docs/vision/EPHAPAX-VISION.adoc`](../docs/vision/EPHAPAX-VISION.adoc)
+> for the dyad framing, and
+> [`formal/PRESERVATION-DESIGN.md §5`](../formal/PRESERVATION-DESIGN.md)
+> for the L2 layer in the four-layer architecture.
+
+## Two L2 Modalities
 
 This crate implements two **focused substructural grammars** — two views of the same ephapax syntax, each enforcing a different structural discipline: