diff --git a/.custodian-brief.md b/.custodian-brief.md
index d01f01a..9ef9888 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,11 +2,20 @@
 # Custodian Brief — the-custodian
 
 **Domain:** custodian  
-**Last synced:** 2026-05-14 16:04 UTC  
+**Last synced:** 2026-05-15 08:55 UTC  
 **State Hub:** http://127.0.0.1:8000 *(adjust if running on a remote machine)*
 
 ## Active Workstreams
 
+### API Performance Optimization
+Progress: 0/4 done  |  workstream_id: `36b97d4a-0144-479b-81fb-9b9072379143`
+
+**Open tasks:**
+- · T1 — Add missing DB indexes  `160152e1`
+- · T2 — Add TTL cache to `/workstreams/workplan-index`  `f74e88d3`
+- · T3 — Replace selectin cascade on list endpoints with lean schemas  `e15378a7`
+- · T4 — Add short server-side TTL cache for `/state/summary`  `20213c08`
+
 ### state-hub CUST-WP-0040 — NATS Event Publishing for Activity-Core Integration
 Progress: 0/6 done  |  workstream_id: `d8ac100b-a844-46a5-9684-415df0d32539`