diff --git a/packages/app/src/pages/session.tsx b/packages/app/src/pages/session.tsx
index 4ae973b85815..14c5a61ca01c 100644
--- a/packages/app/src/pages/session.tsx
+++ b/packages/app/src/pages/session.tsx
@@ -596,7 +596,7 @@ export default function Page() {
   )
   const vcsQuery = createQuery(() => {
     const mode = vcsMode()
-    const enabled = wantsReview() && sync.project?.vcs === "git"
+    const enabled = !sync.data.config.experimental?.disable_vcs_diff && wantsReview() && sync.project?.vcs === "git"
 
     return {
       queryKey: [...vcsKey(), mode] as const,
diff --git a/packages/opencode/src/config/config.ts b/packages/opencode/src/config/config.ts
index f1ceb1b4ed39..835d79e4b53c 100644
--- a/packages/opencode/src/config/config.ts
+++ b/packages/opencode/src/config/config.ts
@@ -237,6 +237,9 @@ export const Info = Schema.Struct({
   experimental: Schema.optional(
     Schema.Struct({
       disable_paste_summary: Schema.optional(Schema.Boolean),
+      disable_vcs_diff: Schema.optional(Schema.Boolean).annotate({
+        description: "Disable live VCS diff queries in the app session review UI",
+      }),
       batch_tool: Schema.optional(Schema.Boolean).annotate({ description: "Enable the batch tool" }),
       openTelemetry: Schema.optional(Schema.Boolean).annotate({
         description: "Enable OpenTelemetry spans for AI SDK calls (using the 'experimental_telemetry' flag)",
diff --git a/packages/sdk/js/src/v2/gen/types.gen.ts b/packages/sdk/js/src/v2/gen/types.gen.ts
index 40e661b46a2d..0ae69ca2e5da 100644
--- a/packages/sdk/js/src/v2/gen/types.gen.ts
+++ b/packages/sdk/js/src/v2/gen/types.gen.ts
@@ -1670,6 +1670,10 @@ export type Config = {
   }
   experimental?: {
     disable_paste_summary?: boolean
+    /**
+     * Disable live VCS diff queries in the app session review UI
+     */
+    disable_vcs_diff?: boolean
     /**
      * Enable the batch tool
      */