diff --git a/README.md b/README.md
index 3984183..d21c5c3 100644
--- a/README.md
+++ b/README.md
@@ -32,10 +32,10 @@
 brew install mole
 ```
 
-**or by Script:**
+**or by Script, for older macOS or latest code:**
 
 ```bash
-# Append '-s latest' for latest code or '-s 1.17.0' for specific version
+# Use for older macOS or latest code; add '-s latest' for newest, or '-s 1.17.0' for a fixed version.
 curl -fsSL https://raw.githubusercontent.com/tw93/mole/main/install.sh | bash
 ```
 
diff --git a/lib/clean/dev.sh b/lib/clean/dev.sh
index f58be68..a72fb83 100644
--- a/lib/clean/dev.sh
+++ b/lib/clean/dev.sh
@@ -22,16 +22,18 @@ clean_dev_npm() {
     fi
     # Clean pnpm store cache
     local pnpm_default_store=~/Library/pnpm/store
-    if command -v pnpm > /dev/null 2>&1; then
-        clean_tool_cache "pnpm cache" pnpm store prune
+    # Check if pnpm is actually usable (not just Corepack shim)
+    if command -v pnpm > /dev/null 2>&1 && env COREPACK_ENABLE_DOWNLOAD_PROMPT=0 pnpm --version > /dev/null 2>&1; then
+        clean_tool_cache "pnpm cache" env COREPACK_ENABLE_DOWNLOAD_PROMPT=0 pnpm store prune
         local pnpm_store_path
         start_section_spinner "Checking store path..."
-        pnpm_store_path=$(run_with_timeout 2 pnpm store path 2> /dev/null) || pnpm_store_path=""
+        pnpm_store_path=$(run_with_timeout 2 env COREPACK_ENABLE_DOWNLOAD_PROMPT=0 pnpm store path 2> /dev/null) || pnpm_store_path=""
         stop_section_spinner
         if [[ -n "$pnpm_store_path" && "$pnpm_store_path" != "$pnpm_default_store" ]]; then
             safe_clean "$pnpm_default_store"/* "Orphaned pnpm store"
         fi
     else
+        # pnpm not installed or not usable, just clean the default store directory
         safe_clean "$pnpm_default_store"/* "pnpm store"
     fi
     note_activity
diff --git a/lib/clean/project.sh b/lib/clean/project.sh
index 4a99d6e..d0a1fb3 100644
--- a/lib/clean/project.sh
+++ b/lib/clean/project.sh
@@ -307,9 +307,14 @@ scan_purge_targets() {
         return
     fi
     if command -v fd > /dev/null 2>&1; then
+        # Escape regex special characters in target names for fd patterns
+        local escaped_targets=()
+        for target in "${PURGE_TARGETS[@]}"; do
+            escaped_targets+=("$(printf '%s' "$target" | sed -e 's/[][(){}.^$*+?|\\]/\\&/g')")
+        done
         local pattern="($(
             IFS='|'
-            echo "${PURGE_TARGETS[*]}"
+            echo "${escaped_targets[*]}"
         ))"
         local fd_args=(
             "--absolute-path"
diff --git a/scripts/test.sh b/scripts/test.sh
index 627b79e..d6eea56 100755
--- a/scripts/test.sh
+++ b/scripts/test.sh
@@ -50,14 +50,14 @@ if command -v bats > /dev/null 2>&1 && [ -d "tests" ]; then
         set -- tests
     fi
     if [[ -t 1 ]]; then
-        if bats -p "$@"; then
+        if bats -p "$@" | sed -e 's/^ok /OK /' -e 's/^not ok /FAIL /'; then
             printf "${GREEN}${ICON_SUCCESS} Unit tests passed${NC}\n"
         else
             printf "${RED}${ICON_ERROR} Unit tests failed${NC}\n"
             ((FAILED++))
         fi
     else
-        if TERM="${TERM:-xterm-256color}" bats --tap "$@"; then
+        if TERM="${TERM:-xterm-256color}" bats --tap "$@" | sed -e 's/^ok /OK /' -e 's/^not ok /FAIL /'; then
             printf "${GREEN}${ICON_SUCCESS} Unit tests passed${NC}\n"
         else
             printf "${RED}${ICON_ERROR} Unit tests failed${NC}\n"
diff --git a/tests/completion.bats b/tests/completion.bats
index 5f131de..d586bcd 100755
--- a/tests/completion.bats
+++ b/tests/completion.bats
@@ -94,8 +94,8 @@ setup() {
 @test "completion zsh includes command descriptions" {
     run "$PROJECT_ROOT/bin/completion.sh" zsh
     [ "$status" -eq 0 ]
-    [[ "$output" == *"optimize:Free up disk space"* ]]
-    [[ "$output" == *"clean:Remove apps completely"* ]]
+    [[ "$output" == *"optimize:Check and maintain system"* ]]
+    [[ "$output" == *"clean:Free up disk space"* ]]
 }
 
 @test "completion fish generates valid fish script" {
@@ -115,6 +115,7 @@ setup() {
 }
 
 @test "completion auto-install detects zsh" {
+    # shellcheck disable=SC2030,SC2031
     export SHELL=/bin/zsh
 
     # Simulate auto-install (no interaction)
@@ -131,8 +132,10 @@ setup() {
 }
 
 @test "completion auto-install detects already installed" {
+    # shellcheck disable=SC2031
     export SHELL=/bin/zsh
     mkdir -p "$HOME"
+    # shellcheck disable=SC2016
     echo 'eval "$(mole completion zsh)"' > "$HOME/.zshrc"
 
     run "$PROJECT_ROOT/bin/completion.sh"