update licensing to add GPLv3 for code

1 files changed, 14 insertions, 6 deletions

diff --git a/preamble.typ b/preamble.typ
index efd2f85..b285afc 100644
--- a/preamble.typ
+++ b/preamble.typ
@@ -34,7 +34,10 @@
     if counter(page).get().first() > 1 {
       grid(
         columns: (1fr, 1fr),
-        align(left, text(8pt)[SAME Analog Modular Ecosystem]), align(right, text(8pt)[CC BY-SA 4.0 - CERN-OHL-S-2.0+]),
+        align(left, text(8pt)[SAME Analog Modular Ecosystem]),
+        align(right, text(
+          8pt,
+        )[CC BY-SA 4.0 -- CERN-OHL-S-2.0+ -- GPLv3.0 or later]),
       )
     }
   },
@@ -71,14 +74,19 @@
 / SPDX-FileCopyrightText: 2026 Denis Chevalier \<perso\@denischevalier.fr>
 / SPDX-License-Identifier: CC-BY-SA-4.0
 / SPDX-License-Identifier: CERN-OHL-S-2.0+
+/ SPDX-License-Identifier: GPL-3.0-or-later
 
-The text, figures, tables, and mathematical content of this specification are
-licensed under CC BY-SA 4.0. If a later version of CC BY-SA is published, the
-author grants permission to distribute this work under that later version as
-well.
+The prose, explanatory text, rendered figures, tables, and mathematical
+content of this specification are licensed under CC BY-SA 4.0. If a later
+version of CC BY-SA is published, the author grants permission to distribute
+this work under that later version as well.
 
 Hardware designs contained herein (schematics, PCB layouts, mechanical
-drawings) are licensed under CERN-OHL-S-2.0+.
+drawings, and CAD models) are licensed under CERN-OHL-S-2.0+.
+
+All executable code, helper libraries (`lib/*`), metrology assertions, and
+embedded verification scripts throughout the source documents are licensed
+under the GNU General Public License v3.0 or later (GPL-3.0-or-later).
 
 // Toc
 #outline(