diff --git a/docs/docs.json b/docs/docs.json
index e77f829a..fb4f5b9e 100644
--- a/docs/docs.json
+++ b/docs/docs.json
@@ -188,7 +188,6 @@
               "rfds/end-turn-token-usage",
               "rfds/auth-methods",
               "rfds/diff-delete",
-              "rfds/boolean-config-option",
               "rfds/elicitation",
               "rfds/next-edit-suggestions",
               "rfds/custom-llm-endpoint",
@@ -211,7 +210,7 @@
           },
           {
             "group": "Preview",
-            "pages": []
+            "pages": ["rfds/boolean-config-option"]
           },
           {
             "group": "Completed",
diff --git a/docs/rfds/boolean-config-option.mdx b/docs/rfds/boolean-config-option.mdx
index b181ae5b..6922d269 100644
--- a/docs/rfds/boolean-config-option.mdx
+++ b/docs/rfds/boolean-config-option.mdx
@@ -187,6 +187,7 @@ While no one would set a value of type boolean that doesn't support it, there is
 
 ## Revision history
 
-- 2026-02-24: Initial proposal
-- 2026-03-05: Updated to reflect final implementation — `flag` renamed to `boolean`, value type changed from untagged `String | Bool` enum to internally-tagged enum with `type` discriminator and untagged `ValueId` fallback, feature-gated behind `unstable_boolean_config`
+- 2026-06-30: Moved to Preview.
 - 2026-06-22: Added the v1 `session.configOptions.boolean` client capability gate so boolean config options are only sent to Clients that explicitly opt in, and made v2-to-v1 compatibility conversion advertise the capability by default
+- 2026-03-05: Updated to reflect final implementation — `flag` renamed to `boolean`, value type changed from untagged `String | Bool` enum to internally-tagged enum with `type` discriminator and untagged `ValueId` fallback, feature-gated behind `unstable_boolean_config`
+- 2026-02-24: Initial proposal
diff --git a/docs/rfds/updates.mdx b/docs/rfds/updates.mdx
index 0286139d..83be070d 100644
--- a/docs/rfds/updates.mdx
+++ b/docs/rfds/updates.mdx
@@ -6,6 +6,13 @@ rss: true
 
 This page tracks lifecycle changes for ACP Requests for Dialog. For broader ACP announcements, see [Updates](/updates).
 
+<Update label="June 30, 2026" tags={["Preview"]}>
+## Boolean Config Option RFD moves to Preview stage
+
+The RFD for adding boolean session configuration options has been moved to Preview stage. Please review the [RFD](/rfds/boolean-config-option) for more information on the current proposal and provide feedback before the feature is stabilized.
+
+</Update>
+
 <Update label="June 29, 2026" tags={["Completed"]}>
 ## Request Cancellation RFD moves to Completed