diff --git a/docs/roadmap/implementation.md b/docs/roadmap/implementation.md
index f7659ac..7dc8a06 100644
--- a/docs/roadmap/implementation.md
+++ b/docs/roadmap/implementation.md
@@ -509,3 +509,6 @@ Commit intent: `Record the test suite remediation results`
   `tests/integration` passed. No deviations.
 - [x] Stage 3 complete — `ansible-role-notarius` commit `cfecf37`; full
   `tests/integration` passed. No deviations.
+- [x] Stage 4 complete — workspace commit `ca82dd7`; sequential full
+  integration validation passed for Seriatim, Audita, and Notarius. No
+  deviations.