diff --git a/.github/workflows/check-poetry-task.yml b/.github/workflows/check-poetry-task.yml
new file mode 100644
index 00000000..f3dfea7a
--- /dev/null
+++ b/.github/workflows/check-poetry-task.yml
@@ -0,0 +1,119 @@
+# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/check-poetry-task.md
+name: Check Poetry
+
+on:
+  create:
+  push:
+    paths:
+      - ".github/workflows/check-poetry-task.ya?ml"
+      - "go.mod"
+      - "go.sum"
+      - "poetry.lock"
+      - "pyproject.toml"
+      - "Taskfile.ya?ml"
+  pull_request:
+    paths:
+      - ".github/workflows/check-poetry-task.ya?ml"
+      - "go.mod"
+      - "go.sum"
+      - "poetry.lock"
+      - "pyproject.toml"
+      - "Taskfile.ya?ml"
+  schedule:
+    # Run periodically to catch breakage caused by external changes.
+    - cron: "0 11 * * THU"
+  workflow_dispatch:
+  repository_dispatch:
+
+jobs:
+  run-determination:
+    runs-on: ubuntu-latest
+    permissions: {}
+    outputs:
+      result: ${{ steps.determination.outputs.result }}
+    steps:
+      - name: Determine if the rest of the workflow should run
+        id: determination
+        run: |
+          RELEASE_BRANCH_REGEX="^refs/heads/((v[0-9]+)|([0-9]+\.[0-9]+\.x))$"
+          # The `create` event trigger doesn't support `branches` filters, so it's necessary to use Bash instead.
+          if [[
+            "${{ github.event_name }}" != "create" ||
+            "${{ github.ref }}" =~ $RELEASE_BRANCH_REGEX
+          ]]; then
+            # Run the other jobs.
+            RESULT="true"
+          else
+            # There is no need to run the other jobs.
+            RESULT="false"
+          fi
+
+          echo "result=$RESULT" >>$GITHUB_OUTPUT
+
+  validate:
+    needs: run-determination
+    if: needs.run-determination.outputs.result == 'true'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v5
+
+      - name: Install Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+
+      - name: Install Python
+        uses: actions/setup-python@v5
+        with:
+          python-version-file: pyproject.toml
+
+      - name: Install Task
+        uses: arduino/setup-task@v2
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          version: 3.x
+
+      - name: Validate configuration
+        run: |
+          task \
+            --silent \
+            poetry:validate
+
+  check-sync:
+    needs: run-determination
+    if: needs.run-determination.outputs.result == 'true'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v5
+
+      - name: Install Python
+        uses: actions/setup-python@v5
+        with:
+          python-version-file: pyproject.toml
+
+      - name: Install Task
+        uses: arduino/setup-task@v2
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          version: 3.x
+
+      - name: Sync lockfile
+        run: |
+          task \
+            --silent \
+            poetry:sync
+
+      - name: Check if lockfile was out of sync
+        run: |
+          git diff \
+            --color \
+            --exit-code \
+            poetry.lock
diff --git a/README.md b/README.md
index 8bb973b3..673bdd38 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@
 [![Publish Tester Build status](https://github.com/arduino/arduino-lint/actions/workflows/publish-go-tester-task.yml/badge.svg)](https://github.com/arduino/arduino-lint/actions/workflows/publish-go-tester-task.yml)
 [![Publish Nightly Build status](https://github.com/arduino/arduino-lint/actions/workflows/publish-go-nightly-task.yml/badge.svg)](https://github.com/arduino/arduino-lint/actions/workflows/publish-go-nightly-task.yml)
 [![Check npm status](https://github.com/arduino/arduino-lint/actions/workflows/check-npm-task.yml/badge.svg)](https://github.com/arduino/arduino-lint/actions/workflows/check-npm-task.yml)
+[![Check Poetry status](https://github.com/arduino/arduino-lint/actions/workflows/check-poetry-task.yml/badge.svg)](https://github.com/arduino/arduino-lint/actions/workflows/check-poetry-task.yml)
 [![Check Python status](https://github.com/arduino/arduino-lint/actions/workflows/check-python-task.yml/badge.svg)](https://github.com/arduino/arduino-lint/actions/workflows/check-python-task.yml)
 [![Check Markdown status](https://github.com/arduino/arduino-lint/actions/workflows/check-markdown-task.yml/badge.svg)](https://github.com/arduino/arduino-lint/actions/workflows/check-markdown-task.yml)
 [![Spell Check status](https://github.com/arduino/arduino-lint/actions/workflows/spell-check-task.yml/badge.svg)](https://github.com/arduino/arduino-lint/actions/workflows/spell-check-task.yml)
diff --git a/Taskfile.yml b/Taskfile.yml
index cf38f37f..dd7b4c5b 100644
--- a/Taskfile.yml
+++ b/Taskfile.yml
@@ -104,6 +104,7 @@ tasks:
           GO_MODULE_PATH: ./ruledocsgen
       - task: markdown:lint
       - task: markdown:check-links
+      - task: poetry:validate
       - task: python:lint
       - task: shell:check
         vars:
@@ -142,6 +143,7 @@ tasks:
           GO_MODULE_PATH: ./ruledocsgen
       - task: markdown:fix
       - task: npm:fix-config
+      - task: poetry:sync
       - task: python:format
       - task: shell:format
         vars:
@@ -664,6 +666,16 @@ tasks:
         poetry install \
           {{if .POETRY_GROUPS}} --only {{.POETRY_GROUPS}} {{end}}
 
+  # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-poetry-task/Taskfile.yml
+  poetry:sync:
+    desc: Sync Poetry lockfile
+    deps:
+      - task: poetry:install
+    cmds:
+      - |
+        poetry lock \
+          --no-cache
+
   # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/poetry-task/Taskfile.yml
   poetry:update-deps:
     desc: Update all dependencies managed by Poetry to their newest versions
@@ -672,6 +684,17 @@ tasks:
     cmds:
       - poetry update
 
+  # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-poetry-task/Taskfile.yml
+  poetry:validate:
+    desc: Validate Poetry configuration
+    deps:
+      - task: poetry:install
+    cmds:
+      - |
+        poetry check \
+          --lock \
+          --strict
+
   # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-python-task/Taskfile.yml
   python:format:
     desc: Format Python files
diff --git a/poetry.lock b/poetry.lock
index d712e319..eb43353d 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 2.1.3 and should not be changed by hand.
+# This file is automatically @generated by Poetry 2.1.4 and should not be changed by hand.
 
 [[package]]
 name = "anyio"
@@ -2253,4 +2253,4 @@ cffi = ["cffi (>=1.17) ; python_version >= \"3.13\" and platform_python_implemen
 [metadata]
 lock-version = "2.1"
 python-versions = "~3.9"
-content-hash = "127a59a7f71ef529856f463fbed9d4b060ac7c3ec23a1968471542076aa01e22"
+content-hash = "f93a8d0391f7e7307aeac48fd1accc13281873501c79db3ce32e3aee7db691b2"
diff --git a/pyproject.toml b/pyproject.toml
index 15d253de..a416e7f7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ poetry = "2.1.4"
 [tool.poetry.dependencies]
 python = "~3.9"
 
-[tool.poetry.dev-dependencies]
+[tool.poetry.group.dev.dependencies]
 black = "^25.1"
 codespell = "^2.4.1"
 flake8 = "^7.3.0"