diff --git a/lib/common.sh b/lib/common.sh
index 209e62d..1e0bc2f 100644
--- a/lib/common.sh
+++ b/lib/common.sh
@@ -871,6 +871,55 @@ ini_set() {
   mv "$tmpfile" "$file"
 }
 
+# Copy all key=value pairs from one INI section into a new section.
+# Usage: ini_copy_section "file" "source_section" "dest_section"
+ini_copy_section() {
+  local file="$1" src="$2" dst="$3"
+  # Read source section into arrays first (ini_set rewrites the file)
+  local in_section=false line k v
+  local keys=() vals=()
+  while IFS= read -r line; do
+    line="${line#"${line%%[![:space:]]*}"}"
+    line="${line%"${line##*[![:space:]]}"}"
+    [[ -z "$line" || "$line" == \#* ]] && continue
+    if [[ "$line" =~ ^\[([^]]+)\] ]]; then
+      if [[ "${BASH_REMATCH[1]}" == "$src" ]]; then in_section=true; else $in_section && break; fi
+      continue
+    fi
+    if $in_section && [[ "$line" =~ ^([^=]+)=(.*) ]]; then
+      k="${BASH_REMATCH[1]}"; v="${BASH_REMATCH[2]}"
+      k="${k#"${k%%[![:space:]]*}"}"; k="${k%"${k##*[![:space:]]}"}"
+      v="${v#"${v%%[![:space:]]*}"}"; v="${v%"${v##*[![:space:]]}"}"
+      keys+=("$k"); vals+=("$v")
+    fi
+  done < "$file"
+  # Now write to destination section
+  local i
+  for i in "${!keys[@]}"; do
+    ini_set "$file" "$dst" "${keys[$i]}" "${vals[$i]}"
+  done
+}
+
+# Remove an entire INI section (header + all keys until next section).
+# Usage: ini_remove_section "file" "section_name"
+ini_remove_section() {
+  local file="$1" section="$2"
+  local tmpfile in_section=false
+  tmpfile=$(mktemp)
+  while IFS= read -r line; do
+    if [[ "$line" =~ ^[[:space:]]*\[([^]]+)\] ]]; then
+      if [[ "${BASH_REMATCH[1]}" == "$section" ]]; then
+        in_section=true; continue
+      else
+        in_section=false
+      fi
+    fi
+    $in_section && continue
+    printf '%s\n' "$line" >> "$tmpfile"
+  done < "$file"
+  mv "$tmpfile" "$file"
+}
+
 # ---------------------------------------------------------------------------
 # Install manifest — tracks what each setup script installs for rollback
 # ---------------------------------------------------------------------------