diff --git a/AGENTS.md b/AGENTS.md
index 5273679d..00323e6c 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -29,7 +29,10 @@ Multi-language Active Inference framework for advanced AI research and applicati
 - Ensure cross-language implementation parity.
 - Keep `gnn/gaussian_agent.gnn.md` in step with `active_infer_ants/agent.py`; validate it
   with `python scripts/validate_gnn_spec.py` (needs the GNN checkout pinned in
-  `gnn/upstream.json`) or `python -m pytest tests/test_gnn_conformance.py`.
+  `gnn/upstream.json`) or `python -m pytest tests/test_gnn_conformance.py`. GNN's
+  [downstream adoption
+  guide](https://github.com/ActiveInferenceInstitute/Generalized_Notation_Notation/blob/main/docs/gnn/integration/downstream_adoption.md)
+  documents the adoption patterns, pin discipline, and drift-guard checks used here.
 - Follow the repository's CC BY-NC-ND 4.0 license.
 - Maintain consistency with parent and sibling directory conventions.
 - Keep all documentation synchronized with actual contents.
diff --git a/README.md b/README.md
index fe868425..0d6bc09e 100644
--- a/README.md
+++ b/README.md
@@ -117,6 +117,10 @@ pinned-parser half when the GNN checkout is unavailable. When editing the specif
 start from GNN's [Start Here](https://github.com/ActiveInferenceInstitute/Generalized_Notation_Notation/blob/v5.0.3/docs/START_HERE.md),
 [framework integration guide](https://github.com/ActiveInferenceInstitute/Generalized_Notation_Notation/blob/v5.0.3/docs/gnn/integration/framework_integration_guide.md),
 and [syntax reference](https://github.com/ActiveInferenceInstitute/Generalized_Notation_Notation/blob/v5.0.3/docs/gnn/reference/gnn_syntax.md).
+For the wider picture (the adoption patterns sibling repositories use, pin discipline, and
+the drift guard these checks implement), see GNN's
+[downstream adoption guide](https://github.com/ActiveInferenceInstitute/Generalized_Notation_Notation/blob/main/docs/gnn/integration/downstream_adoption.md),
+linked on GNN's default branch because it landed after the v5.0.3 pin.
 
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