feat: add element verification to open_application and navigate_browser

- Add verify_element_exists, verify_element_not_exists, verify_timeout_ms to OpenApplicationArgs
- Add verification fields to NavigateBrowserArgs
- Make verify_timeout_ms optional (Option<u64>) across all tools for backwards compatibility
- Add post-action verification logic to both open_application and navigate_browser implementations
- All verification timeouts default to 2000ms if not specified

All tools now have consistent optional verification fields with sensible defaults.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: m13v

crates/terminator-mcp-agent/src/server.rs

@@ -2419,7 +2419,7 @@ Note: Curly brace format (e.g., '{Tab}') is more reliable than plain format (e.g
         // POST-ACTION VERIFICATION
         let verify_exists = args.verify_element_exists.clone();
         let verify_not_exists = args.verify_element_not_exists.clone();
-        let verify_timeout_ms = args.verify_timeout_ms;
+        let verify_timeout_ms = args.verify_timeout_ms.unwrap_or(2000);
 
         let skip_verification = verify_exists.is_empty() && verify_not_exists.is_empty();
 
@@ -4567,6 +4567,67 @@ Set include_logs: true to capture stdout/stderr output. Default is false for cle
         )
         .await;
 
+        // POST-ACTION VERIFICATION
+        if !args.verify_element_exists.is_empty() || !args.verify_element_not_exists.is_empty() {
+            let verify_exists_opt = if args.verify_element_exists.is_empty() {
+                None
+            } else {
+                Some(args.verify_element_exists.as_str())
+            };
+            let verify_not_exists_opt = if args.verify_element_not_exists.is_empty() {
+                None
+            } else {
+                Some(args.verify_element_not_exists.as_str())
+            };
+
+            match crate::helpers::verify_post_action(
+                &self.desktop,
+                &ui_element,
+                verify_exists_opt,
+                verify_not_exists_opt,
+                args.verify_timeout_ms.unwrap_or(2000),
+                &args.url,
+            )
+            .await
+            {
+                Ok(verification_result) => {
+                    tracing::info!(
+                        "[navigate_browser] Verification passed: method={}, details={}",
+                        verification_result.method,
+                        verification_result.details
+                    );
+                    span.set_attribute("verification.passed", "true".to_string());
+                    span.set_attribute("verification.method", verification_result.method.clone());
+                    span.set_attribute(
+                        "verification.elapsed_ms",
+                        verification_result.elapsed_ms.to_string(),
+                    );
+
+                    let verification_json = json!({
+                        "passed": verification_result.passed,
+                        "method": verification_result.method,
+                        "details": verification_result.details,
+                        "elapsed_ms": verification_result.elapsed_ms,
+                        "timestamp": chrono::Utc::now().to_rfc3339(),
+                    });
+
+                    if let Some(obj) = result_json.as_object_mut() {
+                        obj.insert("verification".to_string(), verification_json);
+                    }
+                }
+                Err(e) => {
+                    tracing::error!("[navigate_browser] Verification failed: {}", e);
+                    span.set_attribute("verification.passed", "false".to_string());
+                    span.set_status(false, Some("Verification failed"));
+                    span.end();
+                    return Err(McpError::internal_error(
+                        format!("Post-action verification failed: {e}"),
+                        None,
+                    ));
+                }
+            }
+        }
+
         self.restore_window_management(should_restore).await;
 
         span.set_status(true, None);
@@ -4660,6 +4721,67 @@ Set include_logs: true to capture stdout/stderr output. Default is false for cle
             }
         }
 
+        // POST-ACTION VERIFICATION
+        if !args.verify_element_exists.is_empty() || !args.verify_element_not_exists.is_empty() {
+            let verify_exists_opt = if args.verify_element_exists.is_empty() {
+                None
+            } else {
+                Some(args.verify_element_exists.as_str())
+            };
+            let verify_not_exists_opt = if args.verify_element_not_exists.is_empty() {
+                None
+            } else {
+                Some(args.verify_element_not_exists.as_str())
+            };
+
+            match crate::helpers::verify_post_action(
+                &self.desktop,
+                &ui_element,
+                verify_exists_opt,
+                verify_not_exists_opt,
+                args.verify_timeout_ms.unwrap_or(2000),
+                &args.app_name,
+            )
+            .await
+            {
+                Ok(verification_result) => {
+                    tracing::info!(
+                        "[open_application] Verification passed: method={}, details={}",
+                        verification_result.method,
+                        verification_result.details
+                    );
+                    span.set_attribute("verification.passed", "true".to_string());
+                    span.set_attribute("verification.method", verification_result.method.clone());
+                    span.set_attribute(
+                        "verification.elapsed_ms",
+                        verification_result.elapsed_ms.to_string(),
+                    );
+
+                    let verification_json = json!({
+                        "passed": verification_result.passed,
+                        "method": verification_result.method,
+                        "details": verification_result.details,
+                        "elapsed_ms": verification_result.elapsed_ms,
+                        "timestamp": chrono::Utc::now().to_rfc3339(),
+                    });
+
+                    if let Some(obj) = result_json.as_object_mut() {
+                        obj.insert("verification".to_string(), verification_json);
+                    }
+                }
+                Err(e) => {
+                    tracing::error!("[open_application] Verification failed: {}", e);
+                    span.set_attribute("verification.passed", "false".to_string());
+                    span.set_status(false, Some("Verification failed"));
+                    span.end();
+                    return Err(McpError::internal_error(
+                        format!("Post-action verification failed: {e}"),
+                        None,
+                    ));
+                }
+            }
+        }
+
         // Restore windows if we did window management
         self.restore_window_management(should_restore).await;
 

crates/terminator-mcp-agent/src/utils.rs

@@ -171,9 +171,8 @@ pub struct ActionOptions {
     pub verify_element_not_exists: String,
 
     #[schemars(
-        description = "Timeout in milliseconds for post-action verification. The system will poll until verification passes or timeout is reached. Defaults to 2000ms."
+        description = "Timeout in milliseconds for post-action verification. The system will poll until verification passes or timeout is reached. Defaults to 2000ms if not specified."
     )]
-    #[serde(default)]
     pub verify_timeout_ms: Option<u64>,
 }
 
@@ -596,9 +595,9 @@ pub struct GlobalKeyArgs {
     pub verify_element_not_exists: String,
 
     #[schemars(
-        description = "REQUIRED: Timeout in milliseconds for post-action verification. The system will poll until verification passes or timeout is reached."
+        description = "Timeout in milliseconds for post-action verification. The system will poll until verification passes or timeout is reached. Defaults to 2000ms if not specified."
     )]
-    pub verify_timeout_ms: u64,
+    pub verify_timeout_ms: Option<u64>,
 
     #[serde(flatten)]
     pub tree: TreeOptions,
@@ -781,6 +780,22 @@ pub struct NavigateBrowserArgs {
         description = "Browser process name (e.g., 'chrome', 'msedge', 'firefox'). Will start the browser if not running."
     )]
     pub process: String,
+
+    #[schemars(
+        description = "REQUIRED: Selector that should exist after navigation completes. Used to verify the page loaded successfully. Use empty string \"\" to skip this check."
+    )]
+    pub verify_element_exists: String,
+
+    #[schemars(
+        description = "REQUIRED: Selector that should NOT exist after navigation completes. Use empty string \"\" to skip this check."
+    )]
+    pub verify_element_not_exists: String,
+
+    #[schemars(
+        description = "Timeout in milliseconds for post-action verification. The system will poll until verification passes or timeout is reached. Defaults to 2000ms if not specified."
+    )]
+    pub verify_timeout_ms: Option<u64>,
+
     #[serde(flatten)]
     pub tree: TreeOptions,
     #[serde(flatten)]
@@ -820,6 +835,21 @@ pub struct OpenApplicationArgs {
     #[schemars(description = "Name of the application to open")]
     pub app_name: String,
 
+    #[schemars(
+        description = "REQUIRED: Selector that should exist after the application opens. Used to verify the app loaded successfully (e.g., 'process:notepad|role:Document'). Use empty string \"\" to skip this check."
+    )]
+    pub verify_element_exists: String,
+
+    #[schemars(
+        description = "REQUIRED: Selector that should NOT exist after the application opens. Use empty string \"\" to skip this check."
+    )]
+    pub verify_element_not_exists: String,
+
+    #[schemars(
+        description = "Timeout in milliseconds for post-action verification. The system will poll until verification passes or timeout is reached. Defaults to 2000ms if not specified."
+    )]
+    pub verify_timeout_ms: Option<u64>,
+
     #[serde(flatten)]
     pub monitor: MonitorScreenshotOptions,