diff --git a/AGENTS.md b/AGENTS.md
index 392ec16..476330c 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -44,6 +44,15 @@ don't fit a skill's step-by-step flow.
   its blocked stdin). A C++ module change needs an actual rebuild
   (out-of-tree, in the build VM) and redeploying the `.so` — no shortcut.
 
+## Shell pitfalls
+
+`local a=/x b="$a/y"` expands every value before assigning any, so `b` is
+`/y`: `calamares-online.sh` wrote the downloaded `steamify.sh` to
+`/steamify.sh` and `items.json` to a nonexistent `/qml/`, silently (stderr
+went to `/dev/null`), so the Steamify page always ran on build-time rows and
+the Summary had no labels. Declare a variable in its own `local` before
+using it, and send a step's errors to the launcher's log, not `/dev/null`.
+
 ## ISO permissions
 
 `steamify-prepare.sh` fetches `steamify.sh` with `curl -o`, which doesn't
diff --git a/archiso/airootfs/usr/local/bin/calamares-online.sh b/archiso/airootfs/usr/local/bin/calamares-online.sh
index 5b4040c..9642374 100755
--- a/archiso/airootfs/usr/local/bin/calamares-online.sh
+++ b/archiso/airootfs/usr/local/bin/calamares-online.sh
@@ -47,7 +47,10 @@ EOF
     # Steamify: try the newest release before Calamares starts, so the page
     # and the install step both show/use it; keep the ISO's copy (from
     # steamify-prepare.sh) on any failure (no network, GitHub unreachable).
-    local sdir=/usr/local/share/steamify sbin="$sdir/steamify.sh" sqml="$sdir/qml"
+    # Separate statements: `local` expands all its values before assigning
+    # any, so "$sdir" would still be empty in the same one.
+    local sdir=/usr/local/share/steamify
+    local sbin="$sdir/steamify.sh" sqml="$sdir/qml"
     local tmp; tmp="$(mktemp)"
     if curl -fsSL --max-time 20 https://github.com/theupriser/steamify-cachyos/releases/latest/download/steamify.sh -o "$tmp" &&
         grep -q -- '--defaults' "$tmp"; then
@@ -68,7 +71,7 @@ EOF
     # punctuation and text fields Steamify itself writes: nothing here can
     # break out of the property).
     tmp="$(mktemp)"
-    if "$sbin" --defaults --list > "$tmp" 2>/dev/null && [[ -s "$tmp" ]]; then
+    if "$sbin" --defaults --list > "$tmp" 2>> "$log" && [[ -s "$tmp" ]]; then
         { printf 'pragma Singleton\nimport QtQuick\n\nQtObject {\n    readonly property var rows: '
           cat "$tmp"
           printf '\n}\n'