diff --git a/docs/superpowers/specs/2026-05-07-cp-hicache-host-design.md b/docs/superpowers/specs/2026-05-07-cp-hicache-host-design.md
index 4df93ed95..f90c770c0 100644
--- a/docs/superpowers/specs/2026-05-07-cp-hicache-host-design.md
+++ b/docs/superpowers/specs/2026-05-07-cp-hicache-host-design.md
@@ -427,3 +427,12 @@ These items are deliberately deferred:
 - Independent CP-specific host ratio configuration.
 - Decode-side CP/shared KV HiCache support.
 - Upstream UnifiedRadixTree or HybridCacheController migration.
+
+## Deferred Performance Follow-Up
+
+After host-only CP HiCache correctness lands, port HiCache performance work from
+`25b6a957c` as separate changes with their own tests. Split cached timestamp use,
+incremental eviction heap maintenance, persistent all-reduce tensors, and async
+write acknowledgement into independent patches. Each patch must preserve CP
+zero-owned write/load no-op acknowledgement cardinality and must rerun the CP
+HiCache unit regression commands from the implementation plan.