diff --git a/.custodian-brief.md b/.custodian-brief.md
index 525800d..9f6b869 100644
--- a/.custodian-brief.md
+++ b/.custodian-brief.md
@@ -2,17 +2,11 @@
 # Custodian Brief — coulomb-social
 
 **Domain:** communication  
-**Last synced:** 2026-10-11 21:24 UTC  
+**Last synced:** 2026-10-11 21:31 UTC  
 **State Hub:** http://127.0.0.1:8000 *(adjust if running on a remote machine)*
 
 ## Active Workstreams
 
-### Link authenticator setup from the coulomb.social account page
-Progress: 0/1 done  |  workplan_id: `bf60ed62-5cbb-5276-80da-6c5dec302a2e`
-
-**Open tasks:**
-- · Add "Manage authenticator app" to the session/account details  `b8bb27c0`
-
 ### Sharing, portability and content-storage acceptance
 Progress: 0/3 done  |  workplan_id: `70370f4e-7cba-5b0a-853b-fedcd2bd49a5`
 
diff --git a/WORK-RECORDS.md b/WORK-RECORDS.md
index 86b8a21..cd819d8 100644
--- a/WORK-RECORDS.md
+++ b/WORK-RECORDS.md
@@ -23,7 +23,7 @@
 | workplan | CSOC-WP-0013 | active | — | workplans/CSOC-WP-0013-sharing-content-hardening.md |
 | workplan | CSOC-WP-0014 | active | — | workplans/CSOC-WP-0014-cohort-transfer-bubble-offramp.md |
 | workplan | CSOC-WP-0015 | active | — | workplans/CSOC-WP-0015-communication-runtime-acceptance.md |
-| workplan | CSOC-WP-0016 | ready | — | workplans/CSOC-WP-0016-mfa-setup-link.md |
+| workplan | CSOC-WP-0016 | finished | — | workplans/CSOC-WP-0016-mfa-setup-link.md |
 | task | CSOC-WP-0001-T01 | done | — | workplans/CSOC-WP-0001-bubble-io-exit-assessment.md |
 | task | CSOC-WP-0001-T02 | done | — | workplans/CSOC-WP-0001-bubble-io-exit-assessment.md |
 | task | CSOC-WP-0001-T03 | done | — | workplans/CSOC-WP-0001-bubble-io-exit-assessment.md |
@@ -98,7 +98,7 @@
 | task | CSOC-WP-0015-T02 | todo | — | workplans/CSOC-WP-0015-communication-runtime-acceptance.md |
 | task | CSOC-WP-0015-T03 | wait | — | workplans/CSOC-WP-0015-communication-runtime-acceptance.md |
 | task | CSOC-WP-0015-T04 | todo | — | workplans/CSOC-WP-0015-communication-runtime-acceptance.md |
-| task | CSOC-WP-0016-T01 | todo | — | workplans/CSOC-WP-0016-mfa-setup-link.md |
+| task | CSOC-WP-0016-T01 | done | — | workplans/CSOC-WP-0016-mfa-setup-link.md |
 | intake | CSOC-IN-0001 | closed | blue | docs/intakes/csoc-residuals.md |
 | intake | CSOC-IN-0002 | closed | green | docs/intakes/csoc-residuals.md |
 | intake | CSOC-IN-0003 | open | blue | docs/intakes/csoc-residuals.md |
diff --git a/workplans/CSOC-WP-0016-mfa-setup-link.md b/workplans/CSOC-WP-0016-mfa-setup-link.md
index 2c59875..2813442 100644
--- a/workplans/CSOC-WP-0016-mfa-setup-link.md
+++ b/workplans/CSOC-WP-0016-mfa-setup-link.md
@@ -37,3 +37,7 @@ authoritative source. Do not make OTP required.
 help line. The page does not display enrollment or require a one-time code.
 Password sign-in is unchanged. No separate residual: the link ships with the
 next app image, and this task does not deploy it.
+
+## Completion
+
+Finished in the checkout on 2026-10-11. No residual intake.