diff --git a/wasm/bindings/symbol_editor_embind.cpp b/wasm/bindings/symbol_editor_embind.cpp
new file mode 100644
index 0000000..ecbdf39
--- /dev/null
+++ b/wasm/bindings/symbol_editor_embind.cpp
@@ -0,0 +1,31 @@
+/*
+ * Embind bindings for KiCad symbol_editor WASM.
+ *
+ * Picked up automatically by scripts/kicad/build-kicad-target.sh when building
+ * the symbol_editor app (it compiles wasm/bindings/<app>_embind.cpp if present).
+ *
+ * The symbol editor is the eeschema kiface launched with
+ * TOP_FRAME=FRAME_SCH_SYMBOL_EDITOR, so it links the same
+ * eeschema_kiface_objects as eeschema — including files-io.cpp, whose save
+ * chokepoint references kicadCollabOnSave. eeschema gets the definition from
+ * eeschema_embind.cpp; this TU provides it for the symbol_editor link.
+ * eeschema's other bindings are not pulled in here: they assume a
+ * SCH_EDIT_FRAME top frame, which this app doesn't have.
+ */
+
+#ifdef __EMSCRIPTEN__
+#include <emscripten.h>
+
+// C++ → JS save notification (standalone-hardening save routing). Called from
+// the kicad fork's save chokepoints after a successful write to MEMFS, so the
+// web app can route the saved bytes onward (API upload, local-disk write-back,
+// download). No-op without a JS listener.
+extern "C" void kicadCollabOnSave( const char* aPath )
+{
+    EM_ASM( {
+        if( window.kicadCollab && window.kicadCollab.onSave )
+            window.kicadCollab.onSave( UTF8ToString( $0 ) );
+    }, aPath );
+}
+
+#endif // __EMSCRIPTEN__