diff --git a/docs/docs.json b/docs/docs.json
index fda75f9ab..4feae6c8e 100644
--- a/docs/docs.json
+++ b/docs/docs.json
@@ -226,7 +226,6 @@
               "rfds/plan-operations",
               "rfds/end-turn-token-usage",
               "rfds/get-auth-state",
-              "rfds/subagents",
               "rfds/session-status",
               "rfds/session-set-title",
               "rfds/session-archive",
@@ -236,7 +235,7 @@
           },
           {
             "group": "Preview",
-            "pages": []
+            "pages": ["rfds/subagents"]
           },
           {
             "group": "Completed",
diff --git a/docs/rfds/subagents.mdx b/docs/rfds/subagents.mdx
index 57f10eba0..906ee5c00 100644
--- a/docs/rfds/subagents.mdx
+++ b/docs/rfds/subagents.mdx
@@ -1647,6 +1647,7 @@ important difference from a user-facing session.
 
 ## Revision history
 
+- 2026-11-13: Moved to Preview.
 - 2026-11-13: In v2, each child announced during a resume with replay gets
   its own `replay_complete` update, following the v2 Replay Complete Signal
   RFD.
diff --git a/docs/rfds/updates.mdx b/docs/rfds/updates.mdx
index 550566ba0..e8d27e67d 100644
--- a/docs/rfds/updates.mdx
+++ b/docs/rfds/updates.mdx
@@ -6,6 +6,15 @@ rss: true
 
 This page tracks lifecycle changes for ACP Requests for Dialog. For broader ACP announcements, see [Updates](/updates).
 
+<Update label="November 13, 2026" tags={["Preview"]}>
+## Subagent Sessions RFD moves to Preview stage
+
+The Subagent Sessions RFD has moved to Preview. The schema covers ACP v1 and
+v2. Please review the [RFD](/rfds/subagents), and provide Agent/Client interoperability feedback before
+stabilization.
+
+</Update>
+
 <Update label="November 13, 2026" tags={["Draft"]}>
 ## Speed config option category RFD moves to Draft stage