diff --git a/docs/roadmap/implementation.md b/docs/roadmap/implementation.md
index ad78087..e482cb3 100644
--- a/docs/roadmap/implementation.md
+++ b/docs/roadmap/implementation.md
@@ -39,6 +39,8 @@ criteria. Suite adoption remains deferred to coordinated integration.
 
 ## Stage 1: Update the Application and Public Configuration Interface
 
+Completion: complete (2026-09-28).
+
 ### Required Policy Review
 
 Read workspace `AGENTS.md`, `docs/orientation.md`, `docs/conventions.md`,
@@ -211,7 +213,13 @@ Do not publish or deploy from this plan.
 
 ## Progress Notes
 
-Plan approved; implementation has not started.
+Plan approved.
+
+- Stage 1: role commit `b1b922c`. Syntax check and production-profile lint
+  passed for the role's integration playbooks. Role and workspace
+  `git diff --check` passed. The role diff contains only defaults, argument
+  specifications, the configuration template, and README; no production task
+  or suite pin changed.
 
 ## Open Questions
 
diff --git a/docs/status.md b/docs/status.md
index 282801e..6ddf836 100644
--- a/docs/status.md
+++ b/docs/status.md
@@ -43,7 +43,7 @@ is complete.
 | F0017 | Compose the Notarius testing overlay | Narratio role, pipeline role, collection, consumer, and workspace | done | Published through Narratio `330afe7`, Notarius `a82a83d`, pipeline `c56a942`, collection `ce5b838`, and consumer `0ced48c`; independent review found no remediation issues; validation evidence is in the feature roadmap |
 | F0018 | Adopt Scriptorium v0.15.0 | Scriptorium role and workspace | done | Role commits `61dcafe`, `2fce529`, and `b174c8c` passed independent review with no findings; feature roadmap records validation; suite pins unchanged |
 | F0019 | Adopt Audita v2.0.1 | Audita role and workspace | done | Role `c3dd59f`, following `6137ff2` and `52f67fe`, passed independent review with no findings; [roadmap](roadmap/features/0019-audita-v2-adoption.md) records validation; suite pins unchanged |
-| F0020 | Adopt Notarius v0.8.1 | Notarius role and workspace | ready | [Feature roadmap](roadmap/features/0020-notarius-v0-8-adoption.md) and [staged plan](roadmap/implementation.md) approved; suite pins and testing overlay migration remain deferred |
+| F0020 | Adopt Notarius v0.8.1 | Notarius role and workspace | in_progress | [Feature roadmap](roadmap/features/0020-notarius-v0-8-adoption.md) and [staged plan](roadmap/implementation.md) approved; standalone implementation underway, suite pins and testing overlay migration deferred |
 | A0001 | Audit completed standalone-role test suites | workspace and standalone roles | done | Findings recorded in `docs/roadmap/test-suite-audit-findings.md` |
 | R0001 | Simplify completed standalone-role test suites | workspace and standalone roles | done | Role commits `e08c63c`, `d2d0b9d`, and `cfecf37` passed implementation and independent review |