diff --git a/docs/plans/original-completion-2026-10-02/execution/p28-01/REGISTRATION_PROPOSAL.json b/docs/plans/original-completion-2026-10-02/execution/p28-01/REGISTRATION_PROPOSAL.json
index 00a5be7..34a9b0d 100644
--- a/docs/plans/original-completion-2026-10-02/execution/p28-01/REGISTRATION_PROPOSAL.json
+++ b/docs/plans/original-completion-2026-10-02/execution/p28-01/REGISTRATION_PROPOSAL.json
@@ -111,7 +111,7 @@
       "P28-01-C8"
     ],
     "spec_ref": "docs/plans/original-completion-2026-10-02/execution/p28-01/SPEC.md",
-    "base_commit": "8c36c100b2073baf8a9c536528f319a5d0837a63",
+    "base_commit": "9b4518cd48eda71b64cf43887754353247473f2c",
     "worker": "codex",
     "allowed_paths": [
       "docs/plans/original-completion-2026-10-02/execution/p28-01/collector/**"