diff --git a/.drone.yml b/.drone.yml
index b577712..f27626b 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -4,11 +4,9 @@ type: kubernetes
 name: Terraform root module
 
 trigger:
-  event:
-  - cron
-  - push
-  branch:
-  - main
+  ref:
+    - refs/heads/main
+    - refs/pull/*/head
 
 environment:
   TF_IN_AUTOMATION: "1"
@@ -34,7 +32,7 @@ steps:
 - name: terraform plan
   image: hashicorp/terraform:1.1.8
   commands:
-  - terraform plan -out .tfplan
+  - terraform plan $([[ $${DRONE_BUILD_EVENT} = cron ]] && echo "-detailed-exit-code") -out .tfplan
   environment:
     AWS_ACCESS_KEY_ID:
       from_secret: terraform-aws-key-id
@@ -65,6 +63,28 @@ steps:
     KUBE_TOKEN:
       from_secret: lawndale-k8s-ci-token
 
+---
+kind: pipeline
+type: kubernetes
+name: Check docs and format
+
+environment:
+  TF_IN_AUTOMATION: "1"
+
+trigger:
+  ref:
+    - refs/pull/*/head
+
+steps:
+- name: format and generate docs
+  image: hashicorp/terraform:1.1.8
+  commands:
+    - apk add bash wget 
+    - wget -q https://github.com/terraform-docs/terraform-docs/releases/download/v0.16.0/terraform-docs-v0.16.0-linux-amd64.tar.gz -O - | tar -xz terraform-docs -C /usr/local/bin
+    - terraform fmt
+    - terraform-docs .
+    - git diff --exit-code
+
 ---
 kind: signature
 hmac: 6950738d3bbe37bb7d5201b9fd7a086ee09a2206a433f19d01c2570cc5718b61
diff --git a/.terraform-docs.yml b/.terraform-docs.yml
new file mode 100644
index 0000000..e41c6c7
--- /dev/null
+++ b/.terraform-docs.yml
@@ -0,0 +1,5 @@
+formatter: markdown document
+
+output:
+  mode: inject
+  file: README.md
diff --git a/README.md b/README.md
index 785ed3f..97016f8 100644
--- a/README.md
+++ b/README.md
@@ -32,3 +32,63 @@ Sources:
 
 ## Persistent volume
 Persistence is supported by [terraform-modules//9p-persistent-volume](git.thomasklein.me/thomasklein/terraform-modules/9p-persistent-volume).
+
+
+<!-- BEGIN_TF_DOCS -->
+## Requirements
+
+The following requirements are needed by this module:
+
+- <a name="requirement_aws"></a> [aws](#requirement\_aws) (~> 4.9.0)
+
+- <a name="requirement_gitea"></a> [gitea](#requirement\_gitea) (>= 0.1.0)
+
+- <a name="requirement_helm"></a> [helm](#requirement\_helm) (2.5.1)
+
+- <a name="requirement_kubernetes"></a> [kubernetes](#requirement\_kubernetes) (2.11.0)
+
+## Providers
+
+The following providers are used by this module:
+
+- <a name="provider_gitea"></a> [gitea](#provider\_gitea) (0.1.0)
+
+- <a name="provider_helm"></a> [helm](#provider\_helm) (2.5.1)
+
+- <a name="provider_kubernetes"></a> [kubernetes](#provider\_kubernetes) (2.11.0)
+
+- <a name="provider_random"></a> [random](#provider\_random) (3.2.0)
+
+## Modules
+
+The following Modules are called:
+
+### <a name="module_drone_persistance"></a> [drone\_persistance](#module\_drone\_persistance)
+
+Source: git@git.thomasklein.me:thomasklein/terraform-modules//9p-persistent-volume
+
+Version:
+
+## Resources
+
+The following resources are used by this module:
+
+- [gitea_oauth2_app.this](https://registry.terraform.io/providers/malarinv/gitea/latest/docs/resources/oauth2_app) (resource)
+- [helm_release.drone_runner](https://registry.terraform.io/providers/hashicorp/helm/2.5.1/docs/resources/release) (resource)
+- [helm_release.drone_server](https://registry.terraform.io/providers/hashicorp/helm/2.5.1/docs/resources/release) (resource)
+- [kubernetes_namespace.jobs](https://registry.terraform.io/providers/hashicorp/kubernetes/2.11.0/docs/resources/namespace) (resource)
+- [kubernetes_namespace.server](https://registry.terraform.io/providers/hashicorp/kubernetes/2.11.0/docs/resources/namespace) (resource)
+- [random_password.drone_rpc_secret](https://registry.terraform.io/providers/hashicorp/random/latest/docs/resources/password) (resource)
+
+## Required Inputs
+
+No required inputs.
+
+## Optional Inputs
+
+No optional inputs.
+
+## Outputs
+
+No outputs.
+<!-- END_TF_DOCS -->