diff --git a/.github/workflows/validate-renovate-custom-managers.yml b/.github/workflows/validate-renovate-custom-managers.yml
new file mode 100644
index 00000000..b234666f
--- /dev/null
+++ b/.github/workflows/validate-renovate-custom-managers.yml
@@ -0,0 +1,68 @@
+name: validate-renovate-custom-managers.yml
+on:
+  pull_request:
+    paths:
+      - renovate.json
+      - .github/workflows/validate-renovate-custom-managers.yml
+
+permissions:
+  contents: read
+
+jobs:
+  validate:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+      - name: check
+        run: |
+          root_file="$(mktemp)"
+          git_root="$(git rev-parse --show-toplevel)"
+          jq '[.customManagers | .[] | select(.customType == "regex")]' < "$git_root/renovate.json" > "$root_file"
+          count_item="$(jq 'length' < "$root_file")"
+          all_files_temp="$(mktemp)"
+          find "$(git rev-parse --show-toplevel)" -type f -print0 > "$all_files_temp"
+          # echo "pointer: $all_files_temp"
+          # shellcheck disable=SC2016
+          strip_git_root_query='[inputs | select(length>0)]'\
+          ' | map(. | sub(("^" + '\
+          '($root | reduce ("\\\\", "\\*", "\\^", "\\?", "\\+", "\\.", "\\!", "\\{", "\\}", "\\[", "\\]", "\\$", "\\|", "\\(", "\\)" ) as $c '\
+          '(.; gsub($c; $c)) ) + "/"); "" )) | .[]'
+          all_files_matcher_temp="$(mktemp)"
+          tr '\0' '\n' < "$all_files_temp" | jq --arg root "$git_root" -Rr "$strip_git_root_query" > "$all_files_matcher_temp"
+          item_file="$(mktemp)"
+          err_msg_header="$(tput setab 124)$(tput setaf 15)[ERROR]$(tput sgr0)"
+          errors=""
+          LF=$'\n'
+          # cat "$root_file"
+          for ((of_item=0; of_item < "$count_item"; of_item++)); do
+          grep_temp="$(mktemp)"
+          jq --arg of_item "$of_item" '.[$of_item | tonumber]' < "$root_file" > "$item_file"
+          # echo "item:"
+          # cat "$item_file"
+          # echo "----"
+          count_file_match="$(jq -r '.fileMatch | length' < "$item_file")"
+          for ((of_file_match=0; of_file_match < "$count_file_match"; of_file_match++)); do
+            current_regex="$(jq -r --arg i "$of_file_match" '.fileMatch[$i | tonumber]' < "$item_file")"
+            # echo "regex: $current_regex"
+            grep -aE "$current_regex" < "$all_files_matcher_temp" >> "$grep_temp" || {
+              colored_regex="$(tput setaf 214)${current_regex}$(tput sgr0)"
+              errors="${errors}${err_msg_header} .customManagers[${of_item}].fileMatch[${of_file_match}] (${colored_regex}) does not match to any files.$LF"
+            }
+            done
+          
+            if [ -n "$errors" ]; then break; fi
+            count_string_match="$(jq -r '.matchStrings | length' < "$item_file")"
+            for ((of_string_match=0; of_string_match < "$count_string_match"; of_string_match++)); do
+              current_regex="$(jq -r --arg i "$of_string_match" '.matchStrings[$i | tonumber]' < "$item_file")"
+              xargs grep -Pzo "$current_regex" < "$grep_temp" || {
+                colored_regex="$(tput setaf 214)${current_regex}$(tput sgr0)"
+                errors="${errors}${err_msg_header} .customManagers[${of_item}].matchStrings[${of_string_match}] (${colored_regex}) does not match to following files:$LF$(sed -E 's/^/- /' "$grep_temp")$LF"
+              }
+            done
+            rm "$grep_temp"
+          done
+          
+          if [ -n "$errors" ]; then
+            echo "$errors" >&2
+            exit 1
+          fi