diff --git a/.ansible-lint b/.ansible-lint
new file mode 100644
index 0000000..5891ff5
--- /dev/null
+++ b/.ansible-lint
@@ -0,0 +1,3 @@
+---
+skip_list:
+  - yaml
diff --git a/.drone.yml b/.drone.yml
new file mode 100644
index 0000000..7f06fb5
--- /dev/null
+++ b/.drone.yml
@@ -0,0 +1,21 @@
+---
+kind: pipeline
+type: docker
+name: Lint
+
+steps:
+  - name: yamllint
+    image: cytopia/yamllint
+    commands:
+      - yamllint .
+
+  - name: ansible-playbook syntax check
+    image: cytopia/ansible
+    commands:
+      - ansible-galaxy install -r requirements.yml
+      - ansible-playbook main.yml --syntax-check
+
+  - name: ansible-lint
+    image: cytopia/ansible-lint
+    commands:
+      - ansible-lint main.yml
diff --git a/roles/disksetup/efi_gpt_btrfs/partitioning/defaults/main.yml b/roles/disksetup/efi_gpt_btrfs/partitioning/defaults/main.yml
index 5b56c93..5ddf0d1 100644
--- a/roles/disksetup/efi_gpt_btrfs/partitioning/defaults/main.yml
+++ b/roles/disksetup/efi_gpt_btrfs/partitioning/defaults/main.yml
@@ -19,6 +19,7 @@ partitioning_priv_esp_size: "{{ 512 * 1024 * 1024 }}"
 #   +-- @home    (to be mmounted at /home)
 #   +-- ...
 #
+# yamllint disable-line rule:line-length
 partitioning_priv_btrfs_subvolumes: "{{ partitioning_priv_core_btrfs_subvolumes + partitioning_priv_extra_btrfs_subvolumes }}"
 
 # These subvolumes should always be present. DO NOT OVERRIDE.
diff --git a/roles/disksetup/efi_gpt_luks_btrfs/partitioning/defaults/main.yml b/roles/disksetup/efi_gpt_luks_btrfs/partitioning/defaults/main.yml
index 1dfd7d3..39accb7 100644
--- a/roles/disksetup/efi_gpt_luks_btrfs/partitioning/defaults/main.yml
+++ b/roles/disksetup/efi_gpt_luks_btrfs/partitioning/defaults/main.yml
@@ -19,6 +19,7 @@ partitioning_priv_esp_size: "{{ 512 * 1024 * 1024 }}"
 #   +-- @home    (to be mmounted at /home)
 #   +-- ...
 #
+# yamllint disable-line rule:line-length
 partitioning_priv_btrfs_subvolumes: "{{ partitioning_priv_core_btrfs_subvolumes + partitioning_priv_extra_btrfs_subvolumes }}"
 
 # These subvolumes should always be present. DO NOT OVERRIDE.
diff --git a/roles/display_manager/lightdm/tasks/main.yml b/roles/display_manager/lightdm/tasks/main.yml
index 822f53b..2a718e7 100644
--- a/roles/display_manager/lightdm/tasks/main.yml
+++ b/roles/display_manager/lightdm/tasks/main.yml
@@ -1,3 +1,4 @@
+---
 - name: Install lightdm.
   pacman:
     name:
diff --git a/roles/display_server/xorg/tasks/main.yml b/roles/display_server/xorg/tasks/main.yml
index b70debb..dba696b 100644
--- a/roles/display_server/xorg/tasks/main.yml
+++ b/roles/display_server/xorg/tasks/main.yml
@@ -1,3 +1,4 @@
+---
 - name: Install packages.
   aur:
     name:
diff --git a/roles/window_manager/i3/tasks/main.yml b/roles/window_manager/i3/tasks/main.yml
index 6861c29..ea28589 100644
--- a/roles/window_manager/i3/tasks/main.yml
+++ b/roles/window_manager/i3/tasks/main.yml
@@ -1,3 +1,4 @@
+---
 - name: Install i3.
   pacman:
     name: