diff --git a/.markdownlint.yaml b/.markdownlint.yaml
index b6f0e5a..f5cfbee 100644
--- a/.markdownlint.yaml
+++ b/.markdownlint.yaml
@@ -1 +1,5 @@
 default: true
+MD024:
+    siblings_only: true
+MD013:
+    stern: true
diff --git a/.prettierrc.yaml b/.prettierrc.yaml
new file mode 100644
index 0000000..f07fbdd
--- /dev/null
+++ b/.prettierrc.yaml
@@ -0,0 +1,3 @@
+tabWidth: 2
+overrides:
+    - { "files": "*.yaml", "options": { "tabWidth": 4 } }
diff --git a/example/net/poettering/Calculator.errors.yaml b/example/net/poettering/Calculator.errors.yaml
index b2f6ee3..c691f7f 100644
--- a/example/net/poettering/Calculator.errors.yaml
+++ b/example/net/poettering/Calculator.errors.yaml
@@ -1,6 +1,6 @@
 - name: DivisionByZero
   description: >
-    An attempt to divide by zero was attempted.
+      An attempt to divide by zero was attempted.
 - name: PermissionDenied
   description: >
-    The user does not have enough privileges to perform the operation.
+      The user does not have enough privileges to perform the operation.
diff --git a/example/net/poettering/Calculator.interface.yaml b/example/net/poettering/Calculator.interface.yaml
index 967048d..543d559 100644
--- a/example/net/poettering/Calculator.interface.yaml
+++ b/example/net/poettering/Calculator.interface.yaml
@@ -1,88 +1,88 @@
 description: >
-  An example interface originally described as part of the announcement
-  of new sd-bus interfaces at:
-      http://0pointer.net/blog/the-new-sd-bus-api-of-systemd.html
+    An example interface originally described as part of the announcement
+    of new sd-bus interfaces at:
+        http://0pointer.net/blog/the-new-sd-bus-api-of-systemd.html
 methods:
-  - name: Multiply
-    description: >
-      Multiplies two integers 'x' and 'y' and returns the result.
-    parameters:
-      - name: x
-        type: int64
-        description: >
-          The first integer to multiply.
-      - name: y
-        type: int64
-        description: >
-          The second integer to multiply.
-        default: 1
-    returns:
-      - name: z
-        type: int64
-        description: >
-          The result of (x*y).
-  - name: Divide
-    description: >
-      Divides two integers 'x' and 'y' and returns the result.
-    parameters:
-      - name: x
-        type: int64
-        description: >
-          The first integer to divide.
-      - name: y
-        type: int64
-        description: >
-          The second integer to divide.
-        default: 1
-    returns:
-      - name: z
-        type: int64
-        description: >
-          The result of (x/y).
-    errors:
-      - self.Error.DivisionByZero
-  - name: Clear
-    flags:
-      - unprivileged
-      - no_reply
-    description: >
-      Reset the LastResult property to zero.
+    - name: Multiply
+      description: >
+          Multiplies two integers 'x' and 'y' and returns the result.
+      parameters:
+          - name: x
+            type: int64
+            description: >
+                The first integer to multiply.
+          - name: y
+            type: int64
+            description: >
+                The second integer to multiply.
+            default: 1
+      returns:
+          - name: z
+            type: int64
+            description: >
+                The result of (x*y).
+    - name: Divide
+      description: >
+          Divides two integers 'x' and 'y' and returns the result.
+      parameters:
+          - name: x
+            type: int64
+            description: >
+                The first integer to divide.
+          - name: y
+            type: int64
+            description: >
+                The second integer to divide.
+            default: 1
+      returns:
+          - name: z
+            type: int64
+            description: >
+                The result of (x/y).
+      errors:
+          - self.Error.DivisionByZero
+    - name: Clear
+      flags:
+          - unprivileged
+          - no_reply
+      description: >
+          Reset the LastResult property to zero.
 properties:
-  - name: LastResult
-    type: int64
-    default: 0
-    description: >
-      The result of the most recent calculation.
-  - name: Status
-    type: enum[self.State]
-    default: Success
-    flags:
-      - const
-    description: >
-      The current state of the Calculator.
-  - name: Owner
-    type: string
-    description: >
-      The name of the owner of the Calculator.
-    errors:
-      - self.Error.PermissionDenied
+    - name: LastResult
+      type: int64
+      default: 0
+      description: >
+          The result of the most recent calculation.
+    - name: Status
+      type: enum[self.State]
+      default: Success
+      flags:
+          - const
+      description: >
+          The current state of the Calculator.
+    - name: Owner
+      type: string
+      description: >
+          The name of the owner of the Calculator.
+      errors:
+          - self.Error.PermissionDenied
 signals:
-  - name: Cleared
-    description: >
-      Signal indicating the LastReset property has been set to zero by the
-      'Clear' method.
-    properties:
-      - type: int64
-        description: >
-          Value of LastReset prior to Clear.
+    - name: Cleared
+      description: >
+          Signal indicating the LastReset property has been set to zero by the
+          'Clear' method.
+      properties:
+          - type: int64
+            description: >
+                Value of LastReset prior to Clear.
 enumerations:
-  - name: State
-    description: >
-      Identifies if the service has encountered an error or not.
-    values:
-      - name: Success
-        description: >
-          No error has been encountered.
-      - name: Error
-        description: >
-          The service has encountered an error.
+    - name: State
+      description: >
+          Identifies if the service has encountered an error or not.
+      values:
+          - name: Success
+            description: >
+                No error has been encountered.
+          - name: Error
+            description: >
+                The service has encountered an error.
diff --git a/test/server/Test.interface.yaml b/test/server/Test.interface.yaml
index 4f79ebd..362183d 100644
--- a/test/server/Test.interface.yaml
+++ b/test/server/Test.interface.yaml
@@ -1,49 +1,49 @@
 description: >
-  A test interface
+    A test interface
 properties:
-  - name: SomeValue
-    type: int64
-  - name: ReadonlyValue
-    type: int64
-    flags:
-      - readonly
-      - emits_change
-  - name: ConstValue
-    type: int64
-    flags:
-      - const
-  - name: Countable
-    type: size
-  - name: SignedCountable
-    type: ssize
-  - name: UnsignedInt32
-    type: uint32
-  - name: UnsignedInt64
-    type: uint64
-  - name: ObjectPath
-    type: object_path
-  - name: DoubleAsNAN
-    type: double
-    default: NaN
-  - name: DoubleAsInf
-    type: double
-    default: Infinity
-  - name: DoubleAsNegInf
-    type: double
-    default: -Infinity
-  - name: DoubleAsEpsilon
-    type: double
-    default: Epsilon
+    - name: SomeValue
+      type: int64
+    - name: ReadonlyValue
+      type: int64
+      flags:
+          - readonly
+          - emits_change
+    - name: ConstValue
+      type: int64
+      flags:
+          - const
+    - name: Countable
+      type: size
+    - name: SignedCountable
+      type: ssize
+    - name: UnsignedInt32
+      type: uint32
+    - name: UnsignedInt64
+      type: uint64
+    - name: ObjectPath
+      type: object_path
+    - name: DoubleAsNAN
+      type: double
+      default: NaN
+    - name: DoubleAsInf
+      type: double
+      default: Infinity
+    - name: DoubleAsNegInf
+      type: double
+      default: -Infinity
+    - name: DoubleAsEpsilon
+      type: double
+      default: Epsilon
 
-  - name: VariantOfEnums
-    type: variant[enum[self.EnumOne], string, enum[self.EnumTwo]]
+    - name: VariantOfEnums
+      type: variant[enum[self.EnumOne], string, enum[self.EnumTwo]]
 
 enumerations:
-  - name: EnumOne
-    values:
-      - name: OneA
-      - name: OneB
-  - name: EnumTwo
-    values:
-      - name: TwoA
-      - name: TwoB
+    - name: EnumOne
+      values:
+          - name: OneA
+          - name: OneB
+    - name: EnumTwo
+      values:
+          - name: TwoA
+          - name: TwoB