diff --git a/AGENTS.md b/AGENTS.md
index 96db1f6..31523a5 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -48,3 +48,11 @@ rules (ticket-governed work, push-as-you-go, Discourse as doc SoR, secrets in
 - Docs on Discourse (perf: t/316); `.md` files here are pointers, not SoR.
 - Commits: conventional format, `[#NNN]` ref, short body with clickable
   Redmine comment URL. The meat goes in the ticket comment, same turn.
+
+## Resource-adjustment policy (ratified 2026-09-02)
+
+Agent-approvable: app memory increases only — justified (>80% utilization or
+24h memcg OOM), sized ~2x usage, above manifest floor, exclusions respected
+(bi.knownelement.com, platform services), verified + documented same-day.
+Human-required: any decrease, platform/Postgres/mail tuning, CPU/disk classes,
+repeat-OOM escalations. Full text: Discourse t/317 · Redmine #735.