Promote fuseboxScreenshotCaptureEnabled to stable

Summary:
This feature is fully implemented, stable, and isolated — enable for all.

See also react/react-native-devtools-frontend#252.

Changelog:  
[General][Added] - **React Native DevTools**: Users and agents can now capture app screenshots via the `Page.captureScreenshot` command

Differential Revision: D111894234

Author: huntie

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsDefaults.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<9b295106ef57d7fa85846c57bb74a090>>
+ * @generated SignedSource<<b9af52e00c2ec40c932a9f3da1719efb>>
  */
 
 /**
@@ -141,7 +141,7 @@ public open class ReactNativeFeatureFlagsDefaults : ReactNativeFeatureFlagsProvi
 
   override fun fuseboxNetworkInspectionEnabled(): Boolean = true
 
-  override fun fuseboxScreenshotCaptureEnabled(): Boolean = false
+  override fun fuseboxScreenshotCaptureEnabled(): Boolean = true
 
   override fun optimizedAnimatedPropUpdates(): Boolean = false
 

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/internal/featureflags/ReactNativeFeatureFlagsOverrides_RNOSS_Experimental_Android.kt

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<af67163b6d34bb714b783658501ca6e8>>
+ * @generated SignedSource<<41f83a9921de88f659ddc22172344226>>
  */
 
 /**
@@ -31,8 +31,6 @@ public open class ReactNativeFeatureFlagsOverrides_RNOSS_Experimental_Android :
 
   override fun fuseboxFrameRecordingEnabled(): Boolean = true
 
-  override fun fuseboxScreenshotCaptureEnabled(): Boolean = true
-
   override fun preventShadowTreeCommitExhaustion(): Boolean = true
 
   override fun useSharedAnimatedBackend(): Boolean = true

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlagsDefaults.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<2c09412cdf8edaf4f7d6d90a446ce6fa>>
+ * @generated SignedSource<<2c7b47ef5ae156d4e5396cf8b047f187>>
  */
 
 /**
@@ -264,7 +264,7 @@ class ReactNativeFeatureFlagsDefaults : public ReactNativeFeatureFlagsProvider {
   }
 
   bool fuseboxScreenshotCaptureEnabled() override {
-    return false;
+    return true;
   }
 
   bool optimizedAnimatedPropUpdates() override {

packages/react-native/ReactCommon/react/featureflags/ReactNativeFeatureFlagsOverridesOSSExperimental.h

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<bcd31ae20312c38ff0bbc8fdeac5ce36>>
+ * @generated SignedSource<<630f900c13eb68232717fc28528253e2>>
  */
 
 /**
@@ -43,10 +43,6 @@ class ReactNativeFeatureFlagsOverridesOSSExperimental : public ReactNativeFeatur
     return true;
   }
 
-  bool fuseboxScreenshotCaptureEnabled() override {
-    return true;
-  }
-
   bool preventShadowTreeCommitExhaustion() override {
     return true;
   }

packages/react-native/scripts/featureflags/ReactNativeFeatureFlags.config.js

@@ -680,15 +680,15 @@ const definitions: FeatureFlagDefinitions = {
       ossReleaseStage: 'none',
     },
     fuseboxScreenshotCaptureEnabled: {
-      defaultValue: false,
+      defaultValue: true,
       metadata: {
         dateAdded: '2026-04-01',
         description:
           'Enable Page.captureScreenshot CDP method support in the React Native DevTools CDP backend. This flag is global and should not be changed across React Host lifetimes.',
         expectedReleaseValue: true,
         purpose: 'experimentation',
       },
-      ossReleaseStage: 'experimental',
+      ossReleaseStage: 'stable',
     },
     optimizedAnimatedPropUpdates: {
       defaultValue: false,

packages/react-native/src/private/featureflags/ReactNativeFeatureFlags.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @generated SignedSource<<71e307d568421d49e3943f58c4fcb163>>
+ * @generated SignedSource<<411c2e601987e01db778a82b6237a407>>
  * @flow strict
  * @noformat
  */
@@ -450,7 +450,7 @@ export const fuseboxNetworkInspectionEnabled: Getter<boolean> = createNativeFlag
 /**
  * Enable Page.captureScreenshot CDP method support in the React Native DevTools CDP backend. This flag is global and should not be changed across React Host lifetimes.
  */
-export const fuseboxScreenshotCaptureEnabled: Getter<boolean> = createNativeFlagGetter('fuseboxScreenshotCaptureEnabled', false);
+export const fuseboxScreenshotCaptureEnabled: Getter<boolean> = createNativeFlagGetter('fuseboxScreenshotCaptureEnabled', true);
 /**
  * When enabled, uses optimized platform-specific paths to apply animated props synchronously. On Android, this uses a batched int/double buffer protocol with a single JNI call. On iOS, this passes AnimatedProps directly through the delegate chain and applies them via cloneProps, avoiding the folly::dynamic round-trip.
  */