diff --git a/README.md b/README.md
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--- a/README.md
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@@ -9,6 +9,16 @@ lives in `PFVCluster/provisioning/`, and is the project that **AWX**
 
 ---
 
+## Related repos (2026-09-03, [#769](https://projects.knownelement.com/issues/769))
+
+PFVCluster stopped being the catch-all: domain tooling moved to dedicated KNEL repos. Playbooks/roles here should reference these as their code homes (and vice versa — codified changes in those repos land here as AWX items per the IaC mandate #454):
+
+[siem](https://git.knownelement.com/KNEL/siem) · [netinfra](https://git.knownelement.com/KNEL/netinfra) · [ca](https://git.knownelement.com/KNEL/ca) · [monitoring](https://git.knownelement.com/KNEL/monitoring) · [inventory](https://git.knownelement.com/KNEL/inventory) · [facilities](https://git.knownelement.com/KNEL/facilities) · [perf](https://git.knownelement.com/KNEL/perf) · [backups](https://git.knownelement.com/KNEL/backups) · [mailgateway](https://git.knownelement.com/KNEL/mailgateway) · [secrets](https://git.knownelement.com/KNEL/secrets) · [apt-satellite](https://git.knownelement.com/KNEL/apt-satellite) · [security-onion](https://git.knownelement.com/KNEL/security-onion)
+
+Environment map (prod / preprod / sectestbed) + snapshot lifecycle runbook: [Discourse t/331](https://community.turnsys.com/t/331).
+
+---
+
 ## Repository layout
 
 ```