feat: add 1280x800 viewport support and update Yutori templates default

- Add 1280x800@60 viewport option to browser create/update commands
- Update Yutori computer-use templates (TypeScript & Python) to use 1280x800 as default viewport
- Update documentation and help text to reflect new viewport option

Author: tnsardesai

cmd/browsers.go

@@ -126,6 +126,7 @@ func getAvailableViewports() []string {
 		"1440x900@25",
 		"1024x768@60",
 		"1200x800@60",
+		"1280x800@60",
 	}
 }
 
@@ -2069,7 +2070,7 @@ func init() {
 	browsersUpdateCmd.Flags().String("profile-id", "", "Profile ID to load into the browser session (mutually exclusive with --profile-name)")
 	browsersUpdateCmd.Flags().String("profile-name", "", "Profile name to load into the browser session (mutually exclusive with --profile-id)")
 	browsersUpdateCmd.Flags().Bool("save-changes", false, "If set, save changes back to the profile when the session ends")
-	browsersUpdateCmd.Flags().String("viewport", "", "Browser viewport size (e.g., 1920x1080@25). Supported: 2560x1440@10, 1920x1080@25, 1920x1200@25, 1440x900@25, 1024x768@60, 1200x800@60")
+	browsersUpdateCmd.Flags().String("viewport", "", "Browser viewport size (e.g., 1920x1080@25). Supported: 2560x1440@10, 1920x1080@25, 1920x1200@25, 1440x900@25, 1024x768@60, 1200x800@60, 1280x800@60")
 
 	browsersCmd.AddCommand(browsersListCmd)
 	browsersCmd.AddCommand(browsersCreateCmd)
@@ -2304,7 +2305,7 @@ func init() {
 	browsersCreateCmd.Flags().Bool("save-changes", false, "If set, save changes back to the profile when the session ends")
 	browsersCreateCmd.Flags().String("proxy-id", "", "Proxy ID to use for the browser session")
 	browsersCreateCmd.Flags().StringSlice("extension", []string{}, "Extension IDs or names to load (repeatable; may be passed multiple times or comma-separated)")
-	browsersCreateCmd.Flags().String("viewport", "", "Browser viewport size (e.g., 1920x1080@25). Supported: 2560x1440@10, 1920x1080@25, 1920x1200@25, 1440x900@25, 1024x768@60, 1200x800@60")
+	browsersCreateCmd.Flags().String("viewport", "", "Browser viewport size (e.g., 1920x1080@25). Supported: 2560x1440@10, 1920x1080@25, 1920x1200@25, 1440x900@25, 1024x768@60, 1200x800@60, 1280x800@60")
 	browsersCreateCmd.Flags().Bool("viewport-interactive", false, "Interactively select viewport size from list")
 	browsersCreateCmd.Flags().String("pool-id", "", "Browser pool ID to acquire from (mutually exclusive with --pool-name)")
 	browsersCreateCmd.Flags().String("pool-name", "", "Browser pool name to acquire from (mutually exclusive with --pool-id)")

cmd/browsers_test.go

@@ -280,7 +280,6 @@ func TestBrowsersDelete_Failure(t *testing.T) {
 	assert.True(t, strings.Contains(errMsg, "right failed") || strings.Contains(errMsg, "left failed"), "expected error message to contain either 'right failed' or 'left failed', got: %s", errMsg)
 }
 
-
 func TestBrowsersView_ByID_PrintsURL(t *testing.T) {
 	// Capture both pterm output and raw stdout
 	setupStdoutCapture(t)
@@ -1153,6 +1152,7 @@ func TestGetAvailableViewports_ReturnsExpectedOptions(t *testing.T) {
 	assert.Contains(t, viewports, "1920x1200@25")
 	assert.Contains(t, viewports, "1440x900@25")
 	assert.Contains(t, viewports, "1200x800@60")
+	assert.Contains(t, viewports, "1280x800@60")
 	assert.Contains(t, viewports, "1024x768@60")
 }
 

pkg/templates/python/yutori-computer-use/README.md

@@ -37,9 +37,9 @@ When enabled, the response will include a `replay_url` field with a link to view
 
 ## Viewport Configuration
 
-Yutori n1 recommends a **1280×800 (WXGA, 16:10)** viewport for best grounding accuracy. Kernel's closest supported viewport is **1200×800 at 25Hz**, which this template uses by default.
+Yutori n1 recommends a **1280×800 (WXGA, 16:10)** viewport for best grounding accuracy.
 
-> **Note:** n1 outputs coordinates in a 1000×1000 relative space, which are automatically scaled to the actual viewport dimensions. The slight width difference (1200 vs 1280) should have minimal impact on accuracy.
+> **Note:** n1 outputs coordinates in a 1000×1000 relative space, which are automatically scaled to the actual viewport dimensions.
 
 See [Kernel Viewport Documentation](https://www.kernel.sh/docs/browsers/viewport) for all supported configurations.
 

pkg/templates/python/yutori-computer-use/session.py

@@ -32,7 +32,7 @@ class KernelBrowserSession:
     stealth: bool = True
     timeout_seconds: int = 300
 
-    viewport_width: int = 1200
+    viewport_width: int = 1280
     viewport_height: int = 800
 
     # Replay recording options

pkg/templates/python/yutori-computer-use/tools/computer.py

@@ -91,7 +91,7 @@ class N1Action(TypedDict, total=False):
 
 
 class ComputerTool:
-    def __init__(self, kernel: Kernel, session_id: str, width: int = 1200, height: int = 800):
+    def __init__(self, kernel: Kernel, session_id: str, width: int = 1280, height: int = 800):
         self.kernel = kernel
         self.session_id = session_id
         self.width = width

pkg/templates/python/yutori-computer-use/tools/playwright_computer.py

@@ -38,7 +38,7 @@
 
 
 class PlaywrightComputerTool:
-    def __init__(self, cdp_ws_url: str, width: int = 1200, height: int = 800):
+    def __init__(self, cdp_ws_url: str, width: int = 1280, height: int = 800):
         self.cdp_ws_url = cdp_ws_url
         self.width = width
         self.height = height

pkg/templates/typescript/yutori-computer-use/README.md

@@ -37,9 +37,9 @@ When enabled, the response will include a `replay_url` field with a link to view
 
 ## Viewport Configuration
 
-Yutori n1 recommends a **1280×800 (WXGA, 16:10)** viewport for best grounding accuracy. Kernel's closest supported viewport is **1200×800 at 25Hz**, which this template uses by default.
+Yutori n1 recommends a **1280×800 (WXGA, 16:10)** viewport for best grounding accuracy.
 
-> **Note:** n1 outputs coordinates in a 1000×1000 relative space, which are automatically scaled to the actual viewport dimensions. The slight width difference (1200 vs 1280) should have minimal impact on accuracy.
+> **Note:** n1 outputs coordinates in a 1000×1000 relative space, which are automatically scaled to the actual viewport dimensions.
 
 See [Kernel Viewport Documentation](https://www.kernel.sh/docs/browsers/viewport) for all supported configurations.
 

pkg/templates/typescript/yutori-computer-use/loop.ts

@@ -53,7 +53,7 @@ interface SamplingLoopOptions {
   cdpWsUrl?: string;
   maxTokens?: number;
   maxIterations?: number;
-  /** Viewport width for coordinate scaling (default: 1200, closest to Yutori's 1280 recommendation) */
+  /** Viewport width for coordinate scaling (default: 1280 per Yutori recommendation) */
   viewportWidth?: number;
   /** Viewport height for coordinate scaling (default: 800 per Yutori recommendation) */
   viewportHeight?: number;
@@ -80,8 +80,7 @@ export async function samplingLoop({
   cdpWsUrl,
   maxTokens = 4096,
   maxIterations = 50,
-  // Default viewport: 1200x800 (closest Kernel-supported size to Yutori's recommended 1280x800)
-  viewportWidth = 1200,
+  viewportWidth = 1280,
   viewportHeight = 800,
   mode = 'computer_use',
 }: SamplingLoopOptions): Promise<SamplingLoopResult> {

pkg/templates/typescript/yutori-computer-use/session.ts

@@ -16,7 +16,7 @@ export interface SessionOptions {
   recordReplay?: boolean;
   /** Grace period in seconds before stopping replay */
   replayGracePeriod?: number;
-  /** Viewport width (default: 1200, closest to Yutori's 1280 recommendation) */
+  /** Viewport width (default: 1280 per Yutori recommendation) */
   viewportWidth?: number;
   /** Viewport height (default: 800 per Yutori recommendation) */
   viewportHeight?: number;

pkg/templates/typescript/yutori-computer-use/tools/computer.ts

@@ -98,7 +98,7 @@ export class ComputerTool {
   private width: number;
   private height: number;
 
-  constructor(kernel: Kernel, sessionId: string, width = 1200, height = 800) {
+  constructor(kernel: Kernel, sessionId: string, width = 1280, height = 800) {
     this.kernel = kernel;
     this.sessionId = sessionId;
     this.width = width;