diff --git a/scripts/linux-diag.sh b/scripts/linux-diag.sh
new file mode 100644
index 0000000..6375b31
--- /dev/null
+++ b/scripts/linux-diag.sh
@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+# ant-gui Linux diagnostic. Run on a reporter's machine and paste the
+# output back into the issue. All commands are read-only.
+#
+# Targets the class of errors where GVfs / GIO / libcurl modules fail
+# to load with undefined-symbol complaints (e.g. g_task_set_static_name,
+# nghttp2_option_set_no_rfc9113_leading_and_trailing_ws_validation).
+
+set +e
+
+echo '== /etc/os-release =='
+cat /etc/os-release
+
+echo
+echo '== binary path =='
+BIN="$(readlink -f "$(which ant-gui 2>/dev/null)")"
+if [ -n "$BIN" ]; then
+    echo "$BIN"
+    file "$BIN"
+else
+    echo '(ant-gui not on PATH)'
+fi
+
+echo
+echo '== ldd (glib / gio / curl / nghttp2) =='
+if [ -n "$BIN" ]; then
+    ldd "$BIN" | grep -E 'glib|gio|curl|nghttp2'
+else
+    echo '(no binary — skipping ldd)'
+fi
+
+echo
+echo '== installed package versions =='
+dpkg -l libglib2.0-0 libcurl3-gnutls libnghttp2-14 gvfs dconf-service 2>/dev/null \
+    | awk '/^ii/ {print $2, $3}'
+
+echo
+echo '== upgradable packages =='
+apt list --upgradable 2>/dev/null | grep -E 'glib|gvfs|curl|nghttp2|dconf' \
+    || echo '(none)'
+
+echo
+echo '== apt policy =='
+apt policy libglib2.0-0 libcurl3-gnutls libnghttp2-14 2>/dev/null
+
+echo
+echo '== app config dir =='
+ls -la ~/.config/autonomi/ant-gui/ 2>/dev/null || echo '(no config dir yet)'
+
+echo
+echo '== please also answer in plain text =='
+echo '  (a) Does the file picker open when you click Upload / Download?'
+echo '  (b) Can you import a private key or connect a wallet?'
+echo '  (c) Do uploads actually fail, or do you just see the stderr noise?'