diff --git a/agents/skills/migrations.md b/agents/skills/migrations.md
index 08e3710e..4cae6668 100644
--- a/agents/skills/migrations.md
+++ b/agents/skills/migrations.md
@@ -126,7 +126,7 @@ New migration format:
 - Start with an `echo` describing what the migration does.
 - Use `$OMARCHY_PATH` to reference the Omarchy directory.
 - Be idempotent. Check existing state before changing it.
-- Exit 75 when a temporary condition must leave the migration pending without blocking later migrations. `omarchy-migrate` continues the queue, does not write that migration's completion marker, and retries it on a later run. Other non-zero statuses still abort the migration run.
+- When a temporary condition must leave the migration pending without blocking later migrations, write `$OMARCHY_MIGRATION_DEFER_TOKEN` to `$OMARCHY_MIGRATION_DEFER_FILE`, then exit 75. `omarchy-migrate` requires both signals before it continues the queue without writing that migration's completion marker. An unmarked exit 75 is an ordinary failure and aborts the run, so a child command returning `EX_TEMPFAIL` cannot accidentally defer a migration forever.
 - Use helper commands such as `omarchy-cmd-present`, `omarchy-cmd-missing`,
   `omarchy-pkg-add`, `omarchy-pkg-drop`, `omarchy-pkg-present`, and
   `omarchy-pkg-missing` when appropriate.
diff --git a/bin/omarchy-migrate b/bin/omarchy-migrate
index 85f694b5..59791789 100755
--- a/bin/omarchy-migrate
+++ b/bin/omarchy-migrate
@@ -91,18 +91,28 @@ while IFS=$'\t' read -r name file marker; do
 
   if [[ ! -f $marker ]]; then
     echo -e "\e[32m\nRunning migration (${name%.sh})\e[0m"
-    if OMARCHY_PATH="$OMARCHY_PATH" bash -euo pipefail "$file"; then
+    defer_file=$(mktemp "$STATE_DIR/.defer.XXXXXX")
+    defer_token="$BASHPID-$RANDOM-$RANDOM"
+    migration_status=0
+
+    if OMARCHY_PATH="$OMARCHY_PATH" \
+      OMARCHY_MIGRATION_DEFER_FILE="$defer_file" \
+      OMARCHY_MIGRATION_DEFER_TOKEN="$defer_token" \
+      bash -euo pipefail "$file"; then
       mkdir -p "$(dirname "$marker")"
       touch "$marker"
     else
       migration_status=$?
-      if (( migration_status == 75 )); then
+      if (( migration_status == 75 )) && [[ $(<"$defer_file") == "$defer_token" ]]; then
         deferred+=("$name")
         echo "Migration ${name%.sh} was deferred and will be retried later."
       else
+        rm -f "$defer_file"
         exit "$migration_status"
       fi
     fi
+
+    rm -f "$defer_file"
   fi
 done < <(migration_entries)
 
diff --git a/bin/omarchy-provision-owner b/bin/omarchy-provision-owner
index fc0f219e..d300d1de 100755
--- a/bin/omarchy-provision-owner
+++ b/bin/omarchy-provision-owner
@@ -788,7 +788,7 @@ configure_login() {
 # After=) is what makes it deterministic — no sleep/race against SDDM's startup.
 install_autologin_once_cleanup() {
   local unit=omarchy-provision-autologin-once.service
-  cat >"/etc/systemd/system/$unit" <<'UNIT'
+  sed "s|@UNIT@|$unit|g" >"/etc/systemd/system/$unit" <<'UNIT'
 [Unit]
 Description=Drop the first-boot autologin before the next login
 Before=display-manager.service
@@ -797,7 +797,7 @@ ConditionPathExists=/etc/sddm.conf.d/autologin.conf
 [Service]
 Type=oneshot
 ExecStart=/usr/bin/rm -f /etc/sddm.conf.d/autologin.conf
-ExecStartPost=/usr/bin/rm -f /etc/systemd/system/graphical.target.wants/omarchy-provision-autologin-once.service /etc/systemd/system/omarchy-provision-autologin-once.service
+ExecStartPost=/usr/bin/rm -f /etc/systemd/system/graphical.target.wants/@UNIT@ /etc/systemd/system/@UNIT@
 
 [Install]
 WantedBy=graphical.target
diff --git a/migrations/1787946619.sh b/migrations/1787946619.sh
index 4344503a..be89acfe 100644
--- a/migrations/1787946619.sh
+++ b/migrations/1787946619.sh
@@ -10,9 +10,17 @@ as_root() {
   fi
 }
 
+defer_privileged_repair() {
+  echo "Cannot remove the legacy privileged udev rule; omarchy-migrate will retry it later." >&2
+  if [[ -n ${OMARCHY_MIGRATION_DEFER_FILE:-} && -n ${OMARCHY_MIGRATION_DEFER_TOKEN:-} ]]; then
+    printf '%s\n' "$OMARCHY_MIGRATION_DEFER_TOKEN" >"$OMARCHY_MIGRATION_DEFER_FILE"
+  fi
+  exit 75
+}
+
 # Omarchy 3 generated these two rules with an unquoted heredoc, so the installing
-# user's $HOME was expanded and the file on disk names
-# /home/<user>/.local/share/omarchy/bin/<command>. udev runs RUN+= as root, and
+# user's $HOME was expanded and the file on disk names that absolute home path.
+# udev runs RUN+= as root, and
 # ~/.local/share/omarchy is a symlink that same unprivileged user owns: replacing
 # it with a tree of their own and provoking a power_supply event runs their code
 # as root. Quattro ships the rules as 99-omarchy-*.rules under /usr/bin, but the
@@ -32,7 +40,7 @@ as_root() {
 # path in a comment, and so does a legacy file already repointed at /usr/bin.
 rule_runs_from_home() {
   local file="$1" binary="$2"
-  local pattern="^(/home/[^/]+|/root)/\\.local/share/omarchy/bin/$binary\$"
+  local pattern="^/.+/\\.local/share/omarchy/bin/$binary\$"
   local line logical="" rest command word
   local -a words
 
@@ -68,7 +76,7 @@ rule_runs_from_home() {
       # argument. Compare whole words so no substring stands in for the path.
       read -ra words <<<"$command"
       for word in "${words[@]}"; do
-        if [[ $word =~ $pattern || $word == "$HOME/.local/share/omarchy/bin/$binary" ]]; then
+        if [[ $word =~ $pattern ]]; then
           return 0
         fi
       done
@@ -84,7 +92,9 @@ for legacy_rule in "99-power-profile.rules:omarchy-powerprofiles-set" "99-wifi-p
   rule_file="$rules_dir/${legacy_rule%%:*}"
 
   if [[ -f $rule_file ]] && rule_runs_from_home "$rule_file" "${legacy_rule##*:}"; then
-    as_root rm -f "$rule_file"
+    if ! as_root rm -f "$rule_file"; then
+      defer_privileged_repair
+    fi
     removed=1
   fi
 done
diff --git a/migrations/1788025225.sh b/migrations/1788025225.sh
index 3eeddb0d..d7dbb785 100644
--- a/migrations/1788025225.sh
+++ b/migrations/1788025225.sh
@@ -115,10 +115,10 @@ sudoers_hash_is_active() {
 # one line that is unmistakably this grant: its own self-cleanup. One
 # hand-written line anywhere in the file and it is not ours to delete.
 first_run_sudoers_is_generated() {
-  local spec_pattern='^[^[:space:]]+ ALL=\(ALL\) NOPASSWD: (.+)$'
+  local spec_pattern='^([^[:space:]]+) ALL=\(ALL\) NOPASSWD: (.+)$'
   local marker_pattern='^/bin/rm -f /home/[^/]+/\.local/state/omarchy/first-run\.mode$'
-  local line command
-  local seen_any=0 seen_marker=0
+  local line user command generated_user=""
+  local seen_any=0 seen_marker=0 seen_spec=0
 
   while IFS= read -r line; do
     seen_any=1
@@ -140,7 +140,13 @@ first_run_sudoers_is_generated() {
     if [[ ! $line =~ $spec_pattern ]]; then
       return 1
     fi
-    command=${BASH_REMATCH[1]}
+    user=${BASH_REMATCH[1]}
+    command=${BASH_REMATCH[2]}
+    if [[ -n $generated_user && $user != "$generated_user" ]]; then
+      return 1
+    fi
+    generated_user=$user
+    seen_spec=1
 
     case "$command" in
       "/usr/bin/systemctl" | "/usr/bin/ufw" | "/usr/bin/ufw-docker" | \
@@ -162,7 +168,7 @@ first_run_sudoers_is_generated() {
     return 1
   done < <(active_lines sudoers)
 
-  (( seen_any && seen_marker ))
+  (( seen_any && seen_marker && seen_spec ))
 }
 
 # bin/omarchy-install-tailscale (2025-08-22 to 2026-02-02) ran
@@ -202,7 +208,7 @@ tsui_sudoers_is_generated() {
 plymouth_unit_runs_from_home() {
   local binary="omarchy-plymouth-shutdown-sync"
   local exec_stop_pattern='^ExecStop[[:space:]]*=[[:space:]]*(.*)$'
-  local home_pattern="^(/home/[^/]+|/root)/\\.local/share/omarchy/bin/$binary\$"
+  local home_pattern="^/.+/\\.local/share/omarchy/bin/$binary\$"
   local line word
   local -a words
   local matched=1
@@ -229,7 +235,7 @@ plymouth_unit_runs_from_home() {
       word=${word:1}
     done
 
-    if [[ $word =~ $home_pattern || $word == "$HOME/.local/share/omarchy/bin/$binary" ]]; then
+    if [[ $word =~ $home_pattern ]]; then
       # Non-empty ExecStop= assignments append to the command list. Once a
       # vulnerable command is present it stays live until an empty assignment
       # explicitly resets the list; a later packaged command does not replace it.
@@ -249,6 +255,9 @@ tsui_sudoers="$sudoers_dir/tsui"
 
 defer_privileged_repair() {
   echo "Cannot complete the privileged installer-artifact repair; omarchy-migrate will retry it later." >&2
+  if [[ -n ${OMARCHY_MIGRATION_DEFER_FILE:-} && -n ${OMARCHY_MIGRATION_DEFER_TOKEN:-} ]]; then
+    printf '%s\n' "$OMARCHY_MIGRATION_DEFER_TOKEN" >"$OMARCHY_MIGRATION_DEFER_FILE"
+  fi
   exit 75
 }
 
diff --git a/test/shell.d/fixtures/privileged-heredoc/annotated-special-parameter-before-home.sh b/test/shell.d/fixtures/privileged-heredoc/annotated-special-parameter-before-home.sh
new file mode 100644
index 00000000..5f4d50a2
--- /dev/null
+++ b/test/shell.d/fixtures/privileged-heredoc/annotated-special-parameter-before-home.sh
@@ -0,0 +1,5 @@
+# omarchy:heredoc-expands paths=none -- the positional argument is a scalar
+sudo tee /etc/omarchy/example.conf <<EOF
+argument=$1
+command=$HOME/.local/share/omarchy/bin/example
+EOF
diff --git a/test/shell.d/fixtures/privileged-heredoc/route-continued-pipeline.sh b/test/shell.d/fixtures/privileged-heredoc/route-continued-pipeline.sh
new file mode 100644
index 00000000..54e3f29c
--- /dev/null
+++ b/test/shell.d/fixtures/privileged-heredoc/route-continued-pipeline.sh
@@ -0,0 +1,4 @@
+cat <<EOF |
+command=$HOME/.local/share/omarchy/bin/example
+EOF
+  sudo tee /etc/omarchy/example.conf
diff --git a/test/shell.d/fixtures/privileged-heredoc/route-install-hop-alias.sh b/test/shell.d/fixtures/privileged-heredoc/route-install-hop-alias.sh
new file mode 100644
index 00000000..fbaab243
--- /dev/null
+++ b/test/shell.d/fixtures/privileged-heredoc/route-install-hop-alias.sh
@@ -0,0 +1,6 @@
+tmp=/tmp/omarchy-generated
+copy=$tmp
+cat >"$tmp" <<EOF
+command=$HOME/.local/share/omarchy/bin/example
+EOF
+sudo install -m644 "$copy" /etc/omarchy/example.conf
diff --git a/test/shell.d/fixtures/privileged-heredoc/route-install-hop-braced.sh b/test/shell.d/fixtures/privileged-heredoc/route-install-hop-braced.sh
new file mode 100644
index 00000000..afa12bd2
--- /dev/null
+++ b/test/shell.d/fixtures/privileged-heredoc/route-install-hop-braced.sh
@@ -0,0 +1,5 @@
+tmp=/tmp/omarchy-generated
+cat >"$tmp" <<EOF
+command=$HOME/.local/share/omarchy/bin/example
+EOF
+sudo install -m644 "${tmp}" /etc/omarchy/example.conf
diff --git a/test/shell.d/legacy-power-udev-rules-migration-test.sh b/test/shell.d/legacy-power-udev-rules-migration-test.sh
index 6751edda..0f38fce8 100755
--- a/test/shell.d/legacy-power-udev-rules-migration-test.sh
+++ b/test/shell.d/legacy-power-udev-rules-migration-test.sh
@@ -29,6 +29,15 @@ STUB
 
 chmod +x "$test_dir/bin/"*
 
+mkdir -p "$test_dir/failing-bin"
+cat >"$test_dir/failing-bin/sudo" <<'STUB'
+#!/bin/bash
+
+echo "sudo: a terminal is required to read the password" >&2
+exit 1
+STUB
+chmod +x "$test_dir/failing-bin/sudo"
+
 export CALLS="$test_dir/calls"
 
 rules_dir="$test_dir/rules.d"
@@ -189,17 +198,41 @@ run_migration
   fail "migration keeps a legacy filename already repointed at /usr/bin"
 pass "migration keeps a legacy filename already repointed at /usr/bin"
 
-# Homes are not all under /home, so the running user's own home counts too, and
-# the argument the later variants passed must not hide the path.
+# Homes are not all under /home, and a different account may run this
+# machine-wide repair after the installer account has gone away.
 reset_machine
 cat >"$wifi_rule" <<RULE
-SUBSYSTEM=="power_supply", ATTR{type}=="Mains", ATTR{online}=="0", RUN+="/usr/bin/systemd-run --no-block --collect --unit=omarchy-wifi-powersave-on $home_dir/.local/share/omarchy/bin/omarchy-wifi-powersave on"
+SUBSYSTEM=="power_supply", ATTR{type}=="Mains", ATTR{online}=="0", RUN+="/usr/bin/systemd-run --no-block --collect --unit=omarchy-wifi-powersave-on /srv/retired-installer/.local/share/omarchy/bin/omarchy-wifi-powersave on"
 RULE
 run_migration
 
 [[ ! -e $wifi_rule ]] ||
-  fail "migration removes a rule that runs out of a home outside /home" "$(cat "$wifi_rule")"
-pass "migration removes a rule that runs out of a home outside /home"
+  fail "migration removes another user's rule rooted outside /home" "$(cat "$wifi_rule")"
+pass "migration removes another user's rule rooted outside /home"
+
+# A user who cannot elevate must leave this repair pending without preventing
+# later migrations from running. Once another account removes the machine-wide
+# file, the next retry can complete without sudo.
+reset_machine
+write_vulnerable_wifi_rule
+defer_file="$test_dir/defer-signal"
+defer_token="legacy-udev-repair"
+: >"$defer_file"
+
+set +e
+HOME="$home_dir" \
+  OMARCHY_UDEV_RULES_DIR="$rules_dir" \
+  OMARCHY_MIGRATION_DEFER_FILE="$defer_file" \
+  OMARCHY_MIGRATION_DEFER_TOKEN="$defer_token" \
+  PATH="$test_dir/failing-bin:$PATH" \
+  bash -euo pipefail "$migration" >"$test_dir/defer.out" 2>&1
+defer_status=$?
+set -e
+
+(( defer_status == 75 )) || fail "migration defers when sudo cannot remove a vulnerable rule" "status=$defer_status"
+[[ -e $wifi_rule ]] || fail "migration keeps the vulnerable rule when its elevated removal fails"
+[[ $(<"$defer_file") == "$defer_token" ]] || fail "migration authenticates its deferral to the runner"
+pass "migration defers instead of blocking the queue when removal cannot elevate"
 
 # Nothing named the wrong binary is ours: the same path with a different command
 # is a rule this migration cannot claim to know anything about.
diff --git a/test/shell.d/migrate-scope-test.sh b/test/shell.d/migrate-scope-test.sh
index ba499f0a..d31240b9 100644
--- a/test/shell.d/migrate-scope-test.sh
+++ b/test/shell.d/migrate-scope-test.sh
@@ -83,6 +83,7 @@ mkdir -p "$deferred_root/migrations" "$deferred_home"
 
 cat >"$deferred_root/migrations/100-deferred.sh" <<'SH'
 echo deferred >>"$TEST_CALLS"
+printf '%s\n' "$OMARCHY_MIGRATION_DEFER_TOKEN" >"$OMARCHY_MIGRATION_DEFER_FILE"
 exit 75
 SH
 cat >"$deferred_root/migrations/200-after.sh" <<'SH'
@@ -111,3 +112,32 @@ grep -q '^100-deferred\.sh$' "$test_tmp/deferred-pending.out" ||
 ! grep -q '^200-after\.sh$' "$test_tmp/deferred-pending.out" ||
   fail "migration runner does not report the completed later migration as pending"
 pass "migration runner reports only the deferred migration as pending"
+
+raw_75_root="$test_tmp/raw-75-omarchy"
+raw_75_home="$test_tmp/raw-75-home"
+raw_75_calls="$test_tmp/raw-75-calls"
+mkdir -p "$raw_75_root/migrations" "$raw_75_home"
+
+cat >"$raw_75_root/migrations/100-child-tempfail.sh" <<'SH'
+echo child-tempfail >>"$TEST_CALLS"
+bash -c 'exit 75'
+SH
+cat >"$raw_75_root/migrations/200-after.sh" <<'SH'
+echo after-tempfail >>"$TEST_CALLS"
+SH
+
+set +e
+HOME="$raw_75_home" \
+OMARCHY_PATH="$raw_75_root" \
+TEST_CALLS="$raw_75_calls" \
+  "$ROOT/bin/omarchy-migrate" >"$test_tmp/raw-75.out" 2>"$test_tmp/raw-75.err"
+raw_75_status=$?
+set -e
+
+(( raw_75_status == 75 )) ||
+  fail "migration runner preserves an unmarked child exit 75" "status=$raw_75_status"
+grep -q '^child-tempfail$' "$raw_75_calls" || fail "migration runner starts the exit-75 child"
+! grep -q '^after-tempfail$' "$raw_75_calls" || fail "migration runner stops after an unmarked exit 75"
+[[ ! -f $raw_75_home/.local/state/omarchy/migrations/100-child-tempfail.sh ]] ||
+  fail "migration runner leaves an unmarked exit-75 migration incomplete"
+pass "migration runner does not mistake a child EX_TEMPFAIL for intentional deferral"
diff --git a/test/shell.d/privileged-heredoc-test.sh b/test/shell.d/privileged-heredoc-test.sh
index f02be8c1..0bbe1abf 100755
--- a/test/shell.d/privileged-heredoc-test.sh
+++ b/test/shell.d/privileged-heredoc-test.sh
@@ -50,14 +50,14 @@ USER_WRITABLE_VARS=(HOME PWD OLDPWD TMPDIR OMARCHY_PATH OMARCHY_INSTALL
 WRITE_COMMANDS=(tee dd install cp mv)
 ELEVATORS=(sudo as_root pkexec doas run0)
 
-# A dollar the installing user's shell would act on: $name, ${name} or $(cmd).
+# A dollar the installing user's shell would act on: $name, ${name}, $1, or $(cmd).
 # Kept in a variable because an unquoted `(` inside a bracket expression is a
 # syntax error in [[ =~ ]].
-EXPANSION_RE='\$[A-Za-z_{(]'
+EXPANSION_RE='\$[A-Za-z_{(0-9@*#?$!-]'
 
 # One pattern for every expansion form, shared by masking and name extraction
 # so the two stay in lockstep.
-EXPANSION_SCAN_RE='^([^$]*)\$(\{[^}]*\}|\([^)]*\)|[A-Za-z_][A-Za-z0-9_]*(\[[^]]*\])?)(.*)$'
+EXPANSION_SCAN_RE='^([^$]*)\$(\{[^}]*\}|\([^)]*\)|[A-Za-z_][A-Za-z0-9_]*(\[[^]]*\])?|[0-9@*#?$!-])(.*)$'
 
 # Stand-in name for a command substitution, which has no variable to report.
 COMMAND_SUBSTITUTION="command-substitution"
@@ -145,11 +145,14 @@ mask_and_names() {
       body=${body#[\#!]}
       if [[ $body =~ ^([A-Za-z_][A-Za-z0-9_]*) ]]; then
         name=${BASH_REMATCH[1]}
+      elif [[ $body =~ ^[0-9@*#?$!-]$ ]]; then
+        name="shell-parameter"
       else
         name=$COMMAND_SUBSTITUTION
       fi
     else
       name=${body%%\[*}
+      [[ $name =~ ^[A-Za-z_] ]] || name="shell-parameter"
     fi
 
     names+=("$name")
@@ -418,6 +421,28 @@ command_destinations() {
   fi
 }
 
+# Does LINE carry the same resolved value as DEST? Compare resolved tokens rather
+# than source spelling so $tmp, ${tmp}, and an alias assigned from either form
+# all identify the same scratch file.
+line_carries_destination() {
+  local line="$1" dest="$2" resolved token candidate
+  local -a tokens=()
+
+  resolved=$(resolve_value "$dest")
+  line=${line//\"/ }
+  line=${line//\'/ }
+  read -r -a tokens <<<"$line"
+
+  for token in "${tokens[@]}"; do
+    token=${token#[<>]}
+    token=${token%;}
+    candidate=$(resolve_value "$token")
+    [[ $candidate == "$resolved" ]] && return 0
+  done
+
+  return 1
+}
+
 # Does the heredoc on this line reach a root-owned file? Either directly, or in
 # one hop: written to a scratch file that a later install/cp/mv carries into a
 # privileged directory.
@@ -450,7 +475,7 @@ privileged_destination() {
       while ((follow < ${#scan_lines[@]})); do
         hop=${scan_lines[follow]}
         follow=$((follow + 1))
-        [[ $hop == *"$dest"* ]] || continue
+        line_carries_destination "$hop" "$dest" || continue
         [[ $hop =~ (^|[[:space:]])(install|cp|mv)([[:space:]]|$) ]] || continue
         while IFS= read -r hop_dest; do
           [[ $hop_dest == $'\002elevated' ]] && continue
@@ -475,6 +500,31 @@ privileged_destination() {
   return 1
 }
 
+# A pipeline may put the command consuming a heredoc after its terminator:
+#
+#   cat <<EOF |
+#   body
+#   EOF
+#     sudo tee /etc/file
+#
+# Join only while the command is syntactically continued, leaving unrelated
+# commands below the heredoc to be scanned independently.
+continued_heredoc_command() {
+  local command="$1" next="$2"
+  local -n source_lines="$3"
+
+  while [[ $command =~ (\|\||&&|\|)[[:space:]]*$ ]] && ((next < ${#source_lines[@]})); do
+    while ((next < ${#source_lines[@]})) && [[ ${source_lines[next]} =~ ^[[:space:]]*(#.*)?$ ]]; do
+      next=$((next + 1))
+    done
+    ((next < ${#source_lines[@]})) || break
+    command+=" ${source_lines[next]}"
+    next=$((next + 1))
+  done
+
+  printf '%s' "$command"
+}
+
 # Count the \001 placeholders in a masked token.
 count_placeholders() {
   local text="$1" count=0
@@ -523,7 +573,7 @@ scan_file() {
   local file="$1" display="${2:-$1}"
   local -a lines=()
   local index lineno line scan rest raw operator match prefix guard slot delim candidate candidate_delim body_start
-  local body_text unescaped destination body_line masked_line token name
+  local body_text unescaped destination destination_command body_line masked_line token name
   local declared_paths annotation look shown_paths shown_plain count next slots terminated
   local hd_re='(<<-?)[[:space:]]*("[A-Za-z_][A-Za-z0-9_]*"|'"'"'[A-Za-z_][A-Za-z0-9_]*'"'"'|[A-Za-z_][A-Za-z0-9_]*)'
 
@@ -611,7 +661,8 @@ scan_file() {
       unescaped=$(strip_escapes "$body_text")
       [[ $unescaped =~ $EXPANSION_RE || $unescaped == *'`'* ]] || continue
 
-      destination=$(privileged_destination "$line" "$index" lines) || continue
+      destination_command=$(continued_heredoc_command "$line" "$index" lines)
+      destination=$(privileged_destination "$destination_command" "$index" lines) || continue
 
       # Sort the expansions into the ones that bake a path into the file and
       # the ones that only interpolate a scalar.
@@ -802,6 +853,9 @@ fixture_flags shutdown-unit-home-execstop.sh \
 fixture_flags annotated-paths-none-still-fails.sh \
   "an annotation claiming paths=none cannot silence a baked \$HOME path" \
   "declares paths=none but the path-shaped expansions are HOME"
+fixture_flags annotated-special-parameter-before-home.sh \
+  "a shell special parameter cannot hide a later baked \$HOME path" \
+  "declares paths=none but the path-shaped expansions are HOME"
 
 # A path can hide one or more hops away from the heredoc. In each of these the
 # token in the body has no slash and the value never resolves to a literal path,
@@ -824,6 +878,12 @@ fixture_flags route-variable-path.sh \
   "flags an elevated write whose destination is a variable resolving under /etc"
 fixture_flags route-install-hop.sh \
   "flags a scratch file that install(1) later copies into /usr"
+fixture_flags route-install-hop-braced.sh \
+  "flags a scratch-file hop whose variable uses braces at the privileged copy"
+fixture_flags route-install-hop-alias.sh \
+  "flags a scratch-file hop carried through an alias variable"
+fixture_flags route-continued-pipeline.sh \
+  "flags a privileged pipeline command continued after the heredoc terminator"
 fixture_flags route-dash-delimiter.sh "flags an indented <<- heredoc"
 fixture_flags route-append-redirect.sh "flags an append redirect into /etc"
 fixture_flags arithmetic-left-shift-before-heredoc.sh \
diff --git a/test/shell.d/retired-installer-artifacts-migration-test.sh b/test/shell.d/retired-installer-artifacts-migration-test.sh
index 83f42881..1769649e 100755
--- a/test/shell.d/retired-installer-artifacts-migration-test.sh
+++ b/test/shell.d/retired-installer-artifacts-migration-test.sh
@@ -207,6 +207,19 @@ run_migration
 assert_changed_nothing "migration changes nothing for a hand-written first-run file"
 pass "migration keeps a first-run file carrying a hand-written rule"
 
+# The installer wrote one account name consistently. A whitelisted command for
+# another user is an administrator extension, not part of the generated body.
+reset_machine
+printf '%s\n' "${first_run_variants[-1]}" >"$first_run"
+printf '%%wheel ALL=(ALL) NOPASSWD: /usr/bin/systemctl\n' >>"$first_run"
+before=$(cat "$first_run")
+run_migration
+
+[[ -e $first_run ]] || fail "migration keeps a generated file extended for another sudoers user"
+[[ $(cat "$first_run") == "$before" ]] ||
+  fail "migration leaves a generated file extended for another user byte for byte"
+pass "migration does not delete an administrator grant that uses a generated command"
+
 # Nothing in this file ties it to Omarchy's first run: no self-cleanup line.
 reset_machine
 cat >"$first_run" <<'EOF'
@@ -301,14 +314,16 @@ reload_at=$(grep -n '^systemctl daemon-reload$' "$CALLS" | cut -d: -f1)
   fail "migration disables before removing and reloads last" "$(cat "$CALLS")"
 pass "migration disables the unit, removes it, then reloads systemd in that order"
 
-# Homes are not all under /home.
+# Homes are not all under /home, and the account running this machine-wide
+# repair may not be the account that installed the unit.
 reset_machine
-write_plymouth_unit "$home_dir/.local/share/omarchy/bin/omarchy-plymouth-shutdown-sync"
+write_plymouth_unit "/srv/retired-installer/.local/share/omarchy/bin/omarchy-plymouth-shutdown-sync"
 run_migration
 
 [[ ! -e $plymouth_unit ]] ||
-  fail "migration removes a shutdown unit rooted in a home outside /home"
-pass "migration removes a shutdown unit rooted in a home outside /home"
+  fail "migration removes another user's shutdown unit rooted outside /home"
+[[ -e $machine_marker ]] || fail "migration marks the cross-user Plymouth repair complete"
+pass "migration removes another user's shutdown unit rooted outside /home"
 
 reset_machine
 write_plymouth_unit "/usr/bin/omarchy-plymouth-shutdown-sync"