diff --git a/shared/static/scripts/sx-browser.js b/shared/static/scripts/sx-browser.js
index 398f705..64b8fcd 100644
--- a/shared/static/scripts/sx-browser.js
+++ b/shared/static/scripts/sx-browser.js
@@ -14,7 +14,7 @@
   // =========================================================================
 
   var NIL = Object.freeze({ _nil: true, toString: function() { return "nil"; } });
-  var SX_VERSION = "2026-03-07T00:20:00Z";
+  var SX_VERSION = "2026-03-07T00:33:33Z";
 
   function isNil(x) { return x === NIL || x === null || x === undefined; }
   function isSxTruthy(x) { return x !== false && !isNil(x); }
@@ -178,7 +178,6 @@
   function envMerge(base, overlay) { return merge(base, overlay); }
 
   function dictSet(d, k, v) { d[k] = v; return v; }
-  PRIMITIVES["dict-set!"] = dictSet;
   function dictGet(d, k) { var v = d[k]; return v !== undefined ? v : NIL; }
 
   // Render-expression detection — lets the evaluator delegate to the active adapter.
@@ -316,6 +315,7 @@
   PRIMITIVES["nth"] = function(c, n) { return c && n >= 0 && n < c.length ? c[n] : NIL; };
   PRIMITIVES["cons"] = function(x, c) { return [x].concat(c || []); };
   PRIMITIVES["append"] = function(c, x) { return (c || []).concat([x]); };
+  PRIMITIVES["append!"] = function(arr, x) { arr.push(x); return arr; };
   PRIMITIVES["chunk-every"] = function(c, n) {
     var r = []; for (var i = 0; i < c.length; i += n) r.push(c.slice(i, i + n)); return r;
   };
@@ -342,6 +342,7 @@
     for (var i = 1; i < arguments.length; i++) delete out[arguments[i]];
     return out;
   };
+  PRIMITIVES["dict-set!"] = function(d, k, v) { d[k] = v; return v; };
   PRIMITIVES["into"] = function(target, coll) {
     if (Array.isArray(target)) return Array.isArray(coll) ? coll.slice() : Object.entries(coll);
     var r = {}; for (var i = 0; i < coll.length; i++) { var p = coll[i]; if (Array.isArray(p) && p.length >= 2) r[p[0]] = p[1]; }
@@ -453,7 +454,6 @@
   var range = PRIMITIVES["range"];
   function zip(a, b) { var r = []; for (var i = 0; i < Math.min(a.length, b.length); i++) r.push([a[i], b[i]]); return r; }
   function append_b(arr, x) { arr.push(x); return arr; }
-  PRIMITIVES["append!"] = append_b;
   var apply = function(f, args) { return f.apply(null, args); };
 
   // Additional primitive aliases used by adapter/engine transpiled code
diff --git a/shared/sx/ref/bootstrap_js.py b/shared/sx/ref/bootstrap_js.py
index 739b9a3..d87bc97 100644
--- a/shared/sx/ref/bootstrap_js.py
+++ b/shared/sx/ref/bootstrap_js.py
@@ -1500,6 +1500,7 @@ PRIMITIVES_JS_MODULES: dict[str, str] = {
   PRIMITIVES["nth"] = function(c, n) { return c && n >= 0 && n < c.length ? c[n] : NIL; };
   PRIMITIVES["cons"] = function(x, c) { return [x].concat(c || []); };
   PRIMITIVES["append"] = function(c, x) { return (c || []).concat([x]); };
+  PRIMITIVES["append!"] = function(arr, x) { arr.push(x); return arr; };
   PRIMITIVES["chunk-every"] = function(c, n) {
     var r = []; for (var i = 0; i < c.length; i += n) r.push(c.slice(i, i + n)); return r;
   };
@@ -1527,6 +1528,7 @@ PRIMITIVES_JS_MODULES: dict[str, str] = {
     for (var i = 1; i < arguments.length; i++) delete out[arguments[i]];
     return out;
   };
+  PRIMITIVES["dict-set!"] = function(d, k, v) { d[k] = v; return v; };
   PRIMITIVES["into"] = function(target, coll) {
     if (Array.isArray(target)) return Array.isArray(coll) ? coll.slice() : Object.entries(coll);
     var r = {}; for (var i = 0; i < coll.length; i++) { var p = coll[i]; if (Array.isArray(p) && p.length >= 2) r[p[0]] = p[1]; }
@@ -1712,7 +1714,6 @@ PLATFORM_JS_PRE = '''
   function envMerge(base, overlay) { return merge(base, overlay); }
 
   function dictSet(d, k, v) { d[k] = v; return v; }
-  PRIMITIVES["dict-set!"] = dictSet;
   function dictGet(d, k) { var v = d[k]; return v !== undefined ? v : NIL; }
 
   // Render-expression detection — lets the evaluator delegate to the active adapter.
@@ -1792,7 +1793,6 @@ PLATFORM_JS_POST = '''
   var range = PRIMITIVES["range"];
   function zip(a, b) { var r = []; for (var i = 0; i < Math.min(a.length, b.length); i++) r.push([a[i], b[i]]); return r; }
   function append_b(arr, x) { arr.push(x); return arr; }
-  PRIMITIVES["append!"] = append_b;
   var apply = function(f, args) { return f.apply(null, args); };
 
   // Additional primitive aliases used by adapter/engine transpiled code