diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 94eeace..e403b74 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -259,6 +259,7 @@ Explainers live in `explainers/` and should make one fairness concept easy to un
 | `neural-networks.md` | How networks learn bias from data |
 | `ai-hallucinations.md` | Why confident predictions can still be wrong |
 | `reinforcement-learning.md` | How RL agents learn from reward signals — and why that makes bias hard to see and harder to fix |
+| `proxy-entanglement.md` | Why removing proxies one at a time fails when multiple features encode the same protected signal through correlated, redundant channels |
 
 ### A good explainer should include
 
@@ -382,4 +383,4 @@ Include in the PR description:
 
 ---
 
-All datasets used in this project are publicly available. Fair Code is for educational and awareness purposes.
\ No newline at end of file
+All datasets used in this project are publicly available. Fair Code is for educational and awareness purposes.