diff --git a/README.md b/README.md
index 9e9c289..ac36eb7 100644
--- a/README.md
+++ b/README.md
@@ -101,6 +101,8 @@ If you've debugged a Reticulum interop problem and the answer wasn't in the upst
 
 Add a worked test vector to `test-vectors/` if the finding is byte-level.
 
+## Provenance
+This project is a fork (June 8, 2026) of https://github.com/thatSFguy/reticulum-specifications.  thatSFguy's approach was to use Claude, I use Codex and have applied the approach I used for the LXMF-specification project here.
 ## License
 
 [CC BY 4.0](LICENSE) — use freely, attribution appreciated.