diff --git a/index.html b/index.html
index f87a441..412dcd8 100644
--- a/index.html
+++ b/index.html
@@ -13,6 +13,32 @@
   <body>
 
 <script>
+/* potential paths, from the most traditional to the most exotic
+	https://developer.mozilla.org/en-US/docs/Glossary/Scope
+	https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy
+	https://tc39.es/ecma262/#sec-code-realms
+		https://tc39.es/proposal-shadowrealm/
+
+this starts to look like an "excuse" though for complexity and/or exploring novelty of the language itself and its execution environment
+	the goal remains to
+		efficiently modify the current environment
+			which from experience requires
+				affordances (assumed here as solved, via e.g keyboard typing, <a-console>, jxr, etc) to code
+				a safe environment
+					thus allowing e.g rollback
+						so far jxr/javascript is executed within a try { eval() } block as
+							alternatively eval?.( generatedCodeToEval ) 
+								// forcing global scope but fails, at least result is undefined in that scope
+								in code-generation branch
+								also in nodal branch
+					this is currently not supported
+						namely the context is not saved and can't be replaced back after a failure
+						one has to exit XR (if the bug or new behavior is breaking)
+						reload the page
+				until now refreshing has been the way to rollback
+					some explorations via undo in the speech branch
+
+*/
 
 AFRAME.registerComponent('realm', {
 	// beyond the visual and self-editable aspect of https://git.benetou.fr/utopiah/text-code-xr-engine/src/branch/scaffolding generalizing it and make it, hopefully, safe.
