diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index 5c4582f720..3514468882 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -22,6 +22,7 @@ Resolves #
 - [ ] I have read the [contribution guide](https://github.com/opentofu/opentofu/blob/main/CONTRIBUTING.md).
 - [ ] I have not used an AI coding assistant to create this PR.
 - [ ] I have written all code in this PR myself OR I have marked all code I have not written myself (including modified code, e.g. copied from other places and then modified) with a comment indicating where it came from.
+- [ ] I (and other contributors to this PR) have not looked at the Terraform source code while implementing this PR.
 
 ### Go checklist
 
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index c4a44d4b8c..21ec0bc832 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -56,6 +56,7 @@ Please make sure you complete the following checklist before you mark your PR re
 - [ ] I have read the contribution guidelines.
 - [ ] I have not used an AI coding assistant to create this PR.
 - [ ] I have written all code in this PR myself OR I have marked all code I have not written myself (including modified code, e.g. copied from other places and then modified) with a comment indicating where it came from.
+- [ ] I (and other contributors to this PR) have not looked at the Terraform source code while implementing this PR.
 
 ### Go checklist