diff --git a/.custodian-brief.md b/.custodian-brief.md
index 1a5f073..b060d98 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,12 +2,23 @@
 # Custodian Brief — llm-connect
 
 **Domain:** custodian  
-**Last synced:** 2026-05-01 10:19 UTC  
+**Last synced:** 2026-05-17 16:47 UTC  
 **State Hub:** http://127.0.0.1:8000 *(adjust if running on a remote machine)*
 
 ## Active Workstreams
 
-*(none — repo may need first-session setup)*
+### Adaptive Cost-Quality Routing
+Progress: 0/23 done  |  workstream_id: `e1807fab-e29e-4517-b362-95737a96582d`
+
+**Open tasks:**
+- · QualityObservation dataclass: task_type, adapter_id, model_id, cost_usd, quality_score (0..1), latency_ms, tokens_in, tokens_out, baseline_adapter_id, recorded_at, tags  `1c285bec`
+- · QualityLedger append-only JSONL store with file-locked writes, configurable path, simple query helpers (by_task_type, recent, mean_quality)  `5249f171`
+- · TTL helpers: prune_before(timestamp) and is_stale(observation, max_age)  `adb255cf`
+- · Functional contract doc for the ledger schema and quality_score semantics  `51a33180`
+- · Tests: ledger round-trip, concurrent writes, query helpers, TTL, malformed-line resilience  `458610c5`
+- · GradingResult dataclass: quality_score, notes, grader_id, baseline_response, candidate_response  `c12a595b`
+- · BaselineGrader protocol plus PairedGrader that runs baseline and candidate calls and delegates to a Judge  `80b98e31`
+- … and 16 more open tasks
 
 ---
 ## MCP Orientation (when available)