diff --git a/claude_desktop/rootfs/etc/cont-init.d/22-persistent_cache.sh b/claude_desktop/rootfs/etc/cont-init.d/22-persistent_cache.sh
new file mode 100644
index 0000000000..44c5174052
--- /dev/null
+++ b/claude_desktop/rootfs/etc/cont-init.d/22-persistent_cache.sh
@@ -0,0 +1,58 @@
+#!/usr/bin/with-contenv bashio
+# shellcheck shell=bash
+set -e
+
+# 20-folders.sh is shared with the Webtop add-ons and historically redirects
+# XDG_CACHE_HOME to /tmp/cache. This Claude-specific follow-up runs before the
+# graphical longruns and moves general application caches back under the
+# persistent home. Removing config.yaml's `tmpfs: true` then ensures Chromium,
+# Electron, Mesa and other cache pages are reclaimable filesystem cache instead
+# of permanently charged cgroup shmem.
+LOCATION="$(getent passwd abc 2> /dev/null | cut -d: -f6 || true)"
+if [ -z "$LOCATION" ] || [ "$LOCATION" = "/" ]; then
+    bashio::log.warning "Unable to resolve abc home; leaving XDG cache configuration unchanged"
+    exit 0
+fi
+
+CACHE_DIR="$LOCATION/.cache"
+if [ -L "$CACHE_DIR" ]; then
+    rm -f "$CACHE_DIR"
+fi
+mkdir -p "$CACHE_DIR"
+chown "$(id -u abc):$(id -g abc)" "$CACHE_DIR"
+chmod 700 "$CACHE_DIR"
+
+CACHE_DIR="$CACHE_DIR" python3 - <<'PY'
+import os
+import re
+from pathlib import Path
+
+cache = os.environ["CACHE_DIR"]
+quoted = cache.replace("\\", "\\\\").replace('"', '\\"')
+replacement = f'export XDG_CACHE_HOME="{quoted}"'
+
+for path in Path("/etc/s6-overlay/s6-rc.d").glob("*/run"):
+    try:
+        text = path.read_text()
+    except (OSError, UnicodeDecodeError):
+        continue
+    updated = re.sub(r"^export XDG_CACHE_HOME=.*$", replacement, text, flags=re.MULTILINE)
+    if updated != text:
+        path.write_text(updated)
+
+bashrc = Path.home() / ".bashrc"
+if bashrc.exists():
+    text = bashrc.read_text()
+    updated = re.sub(r"^export XDG_CACHE_HOME=.*$", replacement, text, flags=re.MULTILINE)
+    if updated != text:
+        bashrc.write_text(updated)
+PY
+
+S6_ENVDIR="/run/s6/container_environment"
+mkdir -p "$S6_ENVDIR"
+printf '%s' "$CACHE_DIR" > "$S6_ENVDIR/XDG_CACHE_HOME"
+
+# Safe here: no graphical longrun has started yet, and the former directory was
+# only a boot-created target for the now-removed persistent-home symlink.
+rm -rf /tmp/cache
+bashio::log.info "Application cache moved from RAM-backed /tmp to $CACHE_DIR"