Drop home snapshots, limit root shots to just 5, no btrfs quotas

cc @ryanrhughes

default/snapper/root

@@ -0,0 +1,8 @@
+# Omarchy snapshots root only for pre-update recovery — kept to 5, no timeline
+SUBVOLUME="/"
+FSTYPE="btrfs"
+
+NUMBER_LIMIT="5"
+NUMBER_LIMIT_IMPORTANT="5"
+
+TIMELINE_CREATE="no"

install/login/limine-snapper.sh

@@ -50,26 +50,14 @@ EOF
   # We overwrite the whole thing knowing the limine-update will add the entries for us
   sudo cp $OMARCHY_PATH/default/limine/limine.conf /boot/limine.conf
 
-  # Match Snapper configs if not installing from the ISO
-  if [[ -z ${OMARCHY_CHROOT_INSTALL:-} ]]; then
+  # Only snapshot root — /home is user data; rolling it back loses user work
   if ! sudo snapper list-configs 2>/dev/null | grep -q "root"; then
     sudo snapper -c root create-config /
   fi
+  sudo cp $OMARCHY_PATH/default/snapper/root /etc/snapper/configs/root
 
-    if ! sudo snapper list-configs 2>/dev/null | grep -q "home"; then
-      sudo snapper -c home create-config /home
-    fi
-  fi
-
-  # Enable quota to allow space-aware algorithms to work
-  sudo btrfs quota enable /
-
-  # Tweak default Snapper configs
-  sudo sed -i 's/^TIMELINE_CREATE="yes"/TIMELINE_CREATE="no"/' /etc/snapper/configs/{root,home}
-  sudo sed -i 's/^NUMBER_LIMIT="50"/NUMBER_LIMIT="5"/' /etc/snapper/configs/{root,home}
-  sudo sed -i 's/^NUMBER_LIMIT_IMPORTANT="10"/NUMBER_LIMIT_IMPORTANT="5"/' /etc/snapper/configs/{root,home}
-  sudo sed -i 's/^SPACE_LIMIT="0.5"/SPACE_LIMIT="0.3"/' /etc/snapper/configs/{root,home}
-  sudo sed -i 's/^FREE_LIMIT="0.2"/FREE_LIMIT="0.3"/' /etc/snapper/configs/{root,home}
+  # Disable btrfs quotas — full qgroup accounting is a major performance drag
+  sudo btrfs quota disable / 2>/dev/null || true
 
   chrootable_systemctl_enable limine-snapper-sync.service
 fi

migrations/1776927490.sh

@@ -0,0 +1,50 @@
+echo "Drop /home snapshots, btrfs quotas, and timeline snapshots (keep 5 root snapshots, never more)"
+
+if ! omarchy-cmd-present snapper btrfs; then
+  exit 0
+fi
+
+# Disable btrfs quotas first — every subvolume delete below would otherwise update
+# all qgroups, which is exactly the performance drag we're removing.
+sudo btrfs quota disable / 2>/dev/null || true
+
+# Remove the home config, all its snapshots, and the .snapshots subvolume.
+# If the snapshots look like someone's been using them manually (pre/post pairs,
+# userdata tags, freeform descriptions), ask before destroying.
+if sudo snapper list-configs 2>/dev/null | grep -q "home"; then
+  drop_home="yes"
+
+  if sudo snapper -c home --csvout list 2>/dev/null | \
+     awk -F, 'NR>1 && ($6=="pre" || $6=="post" || $13!="" || ($12!="current" && $12!="timeline" && $12 !~ /^[0-9]+\.[0-9]+\.[0-9]+/))' | \
+     grep -q .; then
+    gum confirm "Drop unused /home snapshots for better performance?" || drop_home="no"
+  fi
+
+  if [[ $drop_home == "yes" ]]; then
+    sudo snapper -c home list --columns number 2>/dev/null | awk 'NR>2 && $1 != "0" {print $1}' | \
+      xargs -r sudo snapper -c home delete 2>/dev/null
+    sudo snapper -c home delete-config 2>/dev/null
+
+    if [[ -d /home/.snapshots ]]; then
+      for snap in /home/.snapshots/*/snapshot; do
+        [[ -d $snap ]] && sudo btrfs subvolume delete "$snap" 2>/dev/null
+      done
+      sudo rm -rf /home/.snapshots/* 2>/dev/null
+      sudo btrfs subvolume delete /home/.snapshots 2>/dev/null
+    fi
+  fi
+fi
+
+# Ensure root config exists and matches our shipped defaults
+if ! sudo snapper list-configs 2>/dev/null | grep -q "root"; then
+  sudo snapper -c root create-config /
+fi
+sudo cp $OMARCHY_PATH/default/snapper/root /etc/snapper/configs/root
+
+# Delete all timeline snapshots — we only want pre-update (cleanup=number) snapshots
+sudo snapper -c root list --columns number,cleanup 2>/dev/null | \
+  awk '$3 == "timeline" {print $1}' | \
+  xargs -r sudo snapper -c root delete 2>/dev/null
+
+# Enforce NUMBER_LIMIT=5 on any existing number snapshots beyond the new cap
+sudo snapper -c root cleanup number 2>/dev/null