diff --git a/SECURITY_AUDIT.md b/SECURITY_AUDIT.md
index 4aa089c..7bec259 100644
--- a/SECURITY_AUDIT.md
+++ b/SECURITY_AUDIT.md
@@ -93,9 +93,14 @@ Even with `sudo`, these paths are **unconditionally blocked**:
 /bin, /sbin, /usr    # Core binaries
 /etc, /var           # System configuration
 /Library/Extensions  # Kernel extensions
+/private             # System-private directories
 ```
 
-**Exception:** `/System/Library/Caches/com.apple.coresymbolicationd/data` (safe, rebuildable cache).
+**Exceptions:**
+
+- `/System/Library/Caches/com.apple.coresymbolicationd/data` (safe, rebuildable cache)
+- `/private/tmp`, `/private/var/tmp`, `/private/var/log`, `/private/var/folders`
+- `/private/var/db/diagnostics`, `/private/var/db/DiagnosticPipeline`, `/private/var/db/powerlog`, `/private/var/db/reportmemoryexception`
 
 **Code:** `lib/core/file_ops.sh:60-78`
 
@@ -161,6 +166,7 @@ For user-selected app removal:
 - **Safety Limit:** 3-char minimum (prevents "Go" matching "Google")
 - **Disabled:** Fuzzy matching and wildcard expansion for short names.
 - **User Confirmation:** Required before deletion.
+- **Receipt Scans:** BOM-derived files are limited to safe system prefixes and filtered by `should_protect_path()`.
 
 **Code:** `lib/clean/apps.sh:uninstall_app()`
 
diff --git a/lib/core/app_protection.sh b/lib/core/app_protection.sh
index 4770bad..98b753a 100755
--- a/lib/core/app_protection.sh
+++ b/lib/core/app_protection.sh
@@ -13,7 +13,7 @@ _MOLE_CORE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 [[ -z "${MOLE_BASE_LOADED:-}" ]] && source "$_MOLE_CORE_DIR/base.sh"
 
 # Declare WHITELIST_PATTERNS if not already set (used by is_path_whitelisted)
-if ! declare -p WHITELIST_PATTERNS &>/dev/null; then
+if ! declare -p WHITELIST_PATTERNS &> /dev/null; then
     declare -a WHITELIST_PATTERNS=()
 fi
 
diff --git a/lib/uninstall/batch.sh b/lib/uninstall/batch.sh
index 8ee9b69..843af7f 100755
--- a/lib/uninstall/batch.sh
+++ b/lib/uninstall/batch.sh
@@ -363,7 +363,7 @@ batch_uninstall_applications() {
 
     # Perform uninstallations with per-app progress feedback
     local success_count=0 failed_count=0
-    local brew_apps_removed=0  # Track successful brew uninstalls for autoremove tip
+    local brew_apps_removed=0 # Track successful brew uninstalls for autoremove tip
     local -a failed_items=()
     local -a success_items=()
     local current_index=0
@@ -573,7 +573,7 @@ batch_uninstall_applications() {
     # Auto-run brew autoremove if Homebrew casks were uninstalled
     if [[ $brew_apps_removed -gt 0 ]]; then
         local autoremove_output removed_count
-        autoremove_output=$(HOMEBREW_NO_ENV_HINTS=1 brew autoremove 2>/dev/null) || true
+        autoremove_output=$(HOMEBREW_NO_ENV_HINTS=1 brew autoremove 2> /dev/null) || true
         removed_count=$(printf '%s\n' "$autoremove_output" | grep -c "^Uninstalling" || true)
         removed_count=${removed_count:-0}
         if [[ $removed_count -gt 0 ]]; then
diff --git a/lib/uninstall/brew.sh b/lib/uninstall/brew.sh
index a749e6a..3811079 100644
--- a/lib/uninstall/brew.sh
+++ b/lib/uninstall/brew.sh
@@ -18,13 +18,13 @@ resolve_path() {
     [[ -e "$p" ]] || return 1
 
     # macOS 12.3+ and Linux have realpath
-    if realpath "$p" 2>/dev/null; then
+    if realpath "$p" 2> /dev/null; then
         return 0
     fi
 
     # Fallback: use cd -P to resolve directory, then append basename
     local dir base
-    dir=$(cd -P "$(dirname "$p")" 2>/dev/null && pwd) || return 1
+    dir=$(cd -P "$(dirname "$p")" 2> /dev/null && pwd) || return 1
     base=$(basename "$p")
     echo "$dir/$base"
 }
@@ -87,9 +87,9 @@ _detect_cask_via_caskroom_search() {
         [[ -d "$room" ]] || continue
         while IFS= read -r match; do
             [[ -n "$match" ]] || continue
-            token=$(_extract_cask_token_from_path "$match" 2>/dev/null) || continue
+            token=$(_extract_cask_token_from_path "$match" 2> /dev/null) || continue
             [[ -n "$token" ]] && tokens+=("$token")
-        done < <(find "$room" -maxdepth 3 -name "$app_bundle_name" 2>/dev/null)
+        done < <(find "$room" -maxdepth 3 -name "$app_bundle_name" 2> /dev/null)
     done
 
     # Need at least one token
@@ -101,7 +101,7 @@ _detect_cask_via_caskroom_search() {
 
     # Only succeed if exactly one unique token found and it's installed
     if ((${#uniq[@]} == 1)) && [[ -n "${uniq[0]}" ]]; then
-        HOMEBREW_NO_ENV_HINTS=1 brew list --cask 2>/dev/null | grep -qxF "${uniq[0]}" || return 1
+        HOMEBREW_NO_ENV_HINTS=1 brew list --cask 2> /dev/null | grep -qxF "${uniq[0]}" || return 1
         echo "${uniq[0]}"
         return 0
     fi
@@ -115,7 +115,7 @@ _detect_cask_via_symlink_check() {
     [[ -L "$app_path" ]] || return 1
 
     local target
-    target=$(readlink "$app_path" 2>/dev/null) || return 1
+    target=$(readlink "$app_path" 2> /dev/null) || return 1
     _extract_cask_token_from_path "$target"
 }
 
@@ -127,10 +127,10 @@ _detect_cask_via_brew_list() {
     app_name_lower=$(echo "${app_bundle_name%.app}" | LC_ALL=C tr '[:upper:]' '[:lower:]')
 
     local cask_name
-    cask_name=$(HOMEBREW_NO_ENV_HINTS=1 brew list --cask 2>/dev/null | grep -Fix "$app_name_lower") || return 1
+    cask_name=$(HOMEBREW_NO_ENV_HINTS=1 brew list --cask 2> /dev/null | grep -Fix "$app_name_lower") || return 1
 
     # Verify this cask actually owns this app path
-    HOMEBREW_NO_ENV_HINTS=1 brew info --cask "$cask_name" 2>/dev/null | grep -qF "$app_path" || return 1
+    HOMEBREW_NO_ENV_HINTS=1 brew info --cask "$cask_name" 2> /dev/null | grep -qF "$app_path" || return 1
     echo "$cask_name"
 }
 
@@ -185,7 +185,7 @@ brew_uninstall_cask() {
 
     # Verify removal
     local cask_gone=true app_gone=true
-    HOMEBREW_NO_ENV_HINTS=1 brew list --cask 2>/dev/null | grep -qxF "$cask_name" && cask_gone=false
+    HOMEBREW_NO_ENV_HINTS=1 brew list --cask 2> /dev/null | grep -qxF "$cask_name" && cask_gone=false
     [[ -n "$app_path" && -e "$app_path" ]] && app_gone=false
 
     # Success: uninstall worked and both are gone, or already uninstalled