diff --git a/extension/connection-state.mjs b/extension/connection-state.mjs
new file mode 100644
index 0000000..e7b3e35
--- /dev/null
+++ b/extension/connection-state.mjs
@@ -0,0 +1,2 @@
+// Only non-secret UX metadata; never a session, passphrase or unwrapped key.
+export const CONNECTION = 'human-connection:https://persimmons.app';