Harden resource cost evidence contract

.custodian-brief.md

@@ -2,31 +2,26 @@
 # Custodian Brief — fin-hub
 
 **Domain:** financials  
-**Last synced:** 2026-08-11 00:20 UTC  
+**Last synced:** 2026-08-11 08:20 UTC  
 **State Hub:** http://127.0.0.1:8000 *(adjust if running on a remote machine)*
 
 ## Active Workstreams
 
 ### Establish the resource cost evidence contract
-Progress: 0/9 done  |  workplan_id: `67b6de6c-4820-4478-9789-f50260204c27`
+Progress: 6/9 done  |  workplan_id: `67b6de6c-4820-4478-9789-f50260204c27`
 
 **Open tasks:**
-- ► T01 — Review and record the authority boundary  `6616e6a0`
-- · T02 — Specify fin-hub to resource-control booked-cost evidence  `0a90dd6f`
-- · T03 — Specify resource-control to fin-hub planning evidence  `ad9dccb4`
 - · T04 — Expose budgets, commitments, and viability constraints  `3620fc2a`
 - · T05 — Implement and reconcile the first round trip  `9a411734`
 - · T06 — Generalize and operate the contract  `a1309d51`
-- · T07 — Correct cost-report dimensions and currency safety  `406ce484`
-- … and 2 more open tasks
 
 ### Client attribution and billing basis
 Progress: 3/6 done  |  workplan_id: `ebc1d2de-ae11-4cde-b860-047922fc74b9`
 
 **Open tasks:**
-- ! Define shared-infrastructure allocation  `899a5c29`
 - ! Export a per-client billing basis  `b5886131`
 - ! Select the external invoicing system  `d30b606f`
+- · Define shared-infrastructure allocation  `899a5c29`
 
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 ## MCP Orientation (when available)