diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index c4d2c0b90..bf16a9ba5 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -130,6 +130,7 @@ Using AI-generated code can hide the source of the inspiration / knowledge / sou
 ### Pull Request Expectations
 
 - **No force-push on open PRs.** Once a pull request is open and being reviewed, do not force-push (`git push --force`) to the branch. Force-pushing rewrites history that reviewers may have already commented on, making it impossible to track incremental changes. Use regular commits or `git merge` to incorporate feedback; the branch will be squash-merged when it is accepted.
+- **Modifications to ``platformio.ini`` MUST be approved explicitly by a *maintainer* or *WLED organisation member*. Modifications to the global build environment may break github action builds. Always flag them.
 - **Document your changes in the PR.** Every pull request should include a clear description of *what* changed and *why*. If the change affects user-visible behavior, describe the expected impact. Link to related issues where applicable. Provide screenshots to showcase new features.
 
 ### Supporting Reviews and Discussions