diff --git a/.github/workflows/check-repositories.yml b/.github/workflows/check-repositories.yml
new file mode 100644
index 00000000..72893d17
--- /dev/null
+++ b/.github/workflows/check-repositories.yml
@@ -0,0 +1,46 @@
+name: DARMA repositories check
+
+# Runs at 00:00 UTC on day 1 of every month
+on:
+  # schedule:
+  #   - cron: '0 0 1 * *'
+  push:
+    branches:
+      - 1-validate-required-workflows-usage-across-repositories
+
+concurrency:
+  group: ${{ github.event.repository.name }}-${{ github.ref }}-${{ github.workflow }}
+  cancel-in-progress: True
+
+jobs:
+  list_repositories:
+    name: List repositories
+    runs-on: ubuntu-latest
+    env:
+      GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: List repositories
+        id: list-repositories
+        run: |
+          REPOSITORIES=$(bash ci/list_repositories.sh)
+          echo "repositories=$(echo $REPOSITORIES)" >> $GITHUB_OUTPUT
+    outputs:
+      repositories: ${{ steps.list-repositories.outputs.repositories }}
+
+  check_repository:
+    name: Check repository (${{ matrix.repository.name }})
+    runs-on: ubuntu-latest
+    needs: list_repositories
+    env:
+      GH_TOKEN: ${{ secrets.ISSUE_CREATION_1}}
+    strategy:
+      fail-fast: false
+      matrix:
+        repository: ${{ fromJson(needs.list_repositories.outputs.repositories ) }}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Check repositories
+        run: |
+          bash ./ci/check_repository.sh ${{ matrix.repository.name }}
diff --git a/.github/workflows/matchers/shell.json b/.github/workflows/matchers/shell.json
new file mode 100644
index 00000000..c52c79e0
--- /dev/null
+++ b/.github/workflows/matchers/shell.json
@@ -0,0 +1,31 @@
+{
+    "problemMatcher": [
+      {
+        "owner": "shell-error",
+        "severity": "error",
+        "pattern": [
+          {
+            "regexp": "^[error]:\\s(.+)$"
+          }
+        ]
+      },
+      {
+        "owner": "shell-warning",
+        "severity": "warning",
+        "pattern": [
+          {
+            "regexp": "^[warning]:\\s(.+)$"
+          }
+        ]
+      },
+      {
+        "owner": "shell-notice",
+        "severity": "notice",
+        "pattern": [
+          {
+            "regexp": "^[notice]:\\s(.+)$"
+          }
+        ]
+      }
+    ]
+  }
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index ed8ebf58..c2e544e2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-__pycache__
\ No newline at end of file
+__pycache__
+ci/repositories.json
diff --git a/ci/check_repository.sh b/ci/check_repository.sh
new file mode 100644
index 00000000..646864df
--- /dev/null
+++ b/ci/check_repository.sh
@@ -0,0 +1,101 @@
+#!/bin/bash
+
+# Check that a repository is compliant:
+# - all expected workflows are present
+
+CURRENT_DIR="$(dirname -- "$(realpath -- "$0")")" # Current directory
+PARENT_DIR="$(dirname "$CURRENT_DIR")"
+WORKING_DIR="$PARENT_DIR/output"
+ORG=DARMA-tasking
+REPOSITORY=$1
+EXPECTED_WORKFLOWS=( \
+find-unsigned-commits \
+check-commit-format \
+find-trailing-whitespace \
+check-pr-fixes-issue \
+action-git-diff-check \
+)
+
+# Clean
+rm -rf $WORKING_DIR
+mkdir -p $WORKING_DIR
+
+# Initialize
+N_ERRORS=0
+TSSTART=$(date +%s)
+echo "$ORG/$REPOSITORY > Cloning repository...";
+git clone https://github.com/$ORG/$REPOSITORY $WORKING_DIR/$REPOSITORY >/dev/null 2>&1
+
+# Directory containing workflow files
+WORKFLOWS_DIR="$WORKING_DIR/$REPOSITORY/.github/workflows"
+FOUND_WORKFLOWS=()
+
+# Check workflows
+if [ ! -d "$WORKFLOWS_DIR" ]; then
+    echo "[error] Workflow directory '$WORKFLOWS_DIR' does not exist."
+    exit 1
+fi
+
+for file in "$WORKFLOWS_DIR"/*.yml; do
+    if [ ! -f "$file" ]; then
+        continue
+    fi
+
+    # Check each file for the current workflow
+    for w in "${EXPECTED_WORKFLOWS[@]}"; do
+        if grep -qE "uses: .*/$w" "$file"; then
+            if [[ ! " ${FOUND_WORKFLOWS[@]} " =~ " $w " ]]; then
+                FOUND_WORKFLOWS+=("$w")
+                echo "[ok] Found workflow '$w' in file '${file#$WORKING_DIR/}'"
+            fi
+        fi
+    done
+
+    # Exit if all workflows are found
+    if [ ${#FOUND_WORKFLOWS[@]} -eq ${#EXPECTED_WORKFLOWS[@]} ]; then
+        break
+    fi
+done
+
+# Find any missing workflows
+MISSING_WORKFLOWS=()
+if [ ${#FOUND_WORKFLOWS[@]} -ne ${#EXPECTED_WORKFLOWS[@]} ]; then
+    echo "[error] Missing workflows:"
+    for w in "${EXPECTED_WORKFLOWS[@]}"; do
+        if [[ ! " ${FOUND_WORKFLOWS[@]} " =~ " $w " ]]; then
+            echo "  - $w"
+            MISSING_WORKFLOWS+=("$w")
+            ((N_ERRORS++))
+        fi
+    done
+else
+    echo "[ok] All expected workflows are present."
+fi
+
+# Finalize
+TSEND=$(date +%s)
+TSDURATION=$(( $TSEND - $TSSTART ))
+if [[ $N_ERRORS -gt 0 ]]; then
+    echo "Creating an issue in $REPOSITORY to add missing workflows..."
+
+    if [ ${#MISSING_WORKFLOWS[@]} -gt 0 ]; then
+        ISSUE_TITLE="[workflows] Missing Actions"
+        ISSUE_BODY="The following actions are missing from the repository:"
+        for w in "${MISSING_WORKFLOWS[@]}"; do
+            ISSUE_BODY+=$'\n- '"$w"
+        done
+
+        gh issue create \
+            --repo "$ORG/$REPOSITORY" \
+            --title "$ISSUE_TITLE" \
+            --body "$ISSUE_BODY"
+    fi
+else
+    echo "[success] repository checks OK."
+fi
+echo "$WORKING_DIR/$REPOSITORY has been processed in $TSDURATION seconds."
+echo "--------------------------------------------------";
+
+if [[ $N_ERRORS -gt 0 ]]; then
+    exit 1
+fi
diff --git a/ci/list_repositories.sh b/ci/list_repositories.sh
new file mode 100644
index 00000000..ae33654d
--- /dev/null
+++ b/ci/list_repositories.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# List the repositories in the DARMA-tasking organization - in JSON format -
+# that need to be checked
+
+ORG=DARMA-tasking
+EXCLUDE='[
+    "DARMA-tasking.github.io",
+    "find-unsigned-commits",
+    "check-commit-format",
+    "find-trailing-whitespace",
+    "check-pr-fixes-issue",
+    "vt-sample-project",
+    "parallel-for-transformer",
+    "detector",
+    "workflows"
+]'
+JQ="$EXCLUDE as \$blacklist | .[] | select(.isFork | not) | select(.name as \$in | \$blacklist | index(\$in) | not)"
+gh repo list $ORG --json name,defaultBranchRef,isFork --jq "$JQ" | jq -s 'sort_by(.name)'