Mnovich/temporal foreground tasks (#2895)

Co-authored-by: Carlos M. Lopez <carlopez@squareup.com>

crates/goose/src/agents/schedule_tool.rs

@@ -94,6 +94,20 @@ impl Agent {
                 ToolError::ExecutionError("Missing 'cron_expression' parameter".to_string())
             })?;
 
+        // Get the execution_mode parameter, defaulting to "background" if not provided
+        let execution_mode = arguments
+            .get("execution_mode")
+            .and_then(|v| v.as_str())
+            .unwrap_or("background");
+
+        // Validate execution_mode is either "foreground" or "background"
+        if execution_mode != "foreground" && execution_mode != "background" {
+            return Err(ToolError::ExecutionError(format!(
+                "Invalid execution_mode: {}. Must be 'foreground' or 'background'",
+                execution_mode
+            )));
+        }
+
         // Validate recipe file exists and is readable
         if !std::path::Path::new(recipe_path).exists() {
             return Err(ToolError::ExecutionError(format!(
@@ -135,12 +149,13 @@ impl Agent {
             paused: false,
             current_session_id: None,
             process_start_time: None,
+            execution_mode: Some(execution_mode.to_string()),
         };
 
         match scheduler.add_scheduled_job(job).await {
             Ok(()) => Ok(vec![Content::text(format!(
-                "Successfully created scheduled job '{}' for recipe '{}' with cron expression '{}'",
-                job_id, recipe_path, cron_expression
+                "Successfully created scheduled job '{}' for recipe '{}' with cron expression '{}' in {} mode",
+                job_id, recipe_path, cron_expression, execution_mode
             ))]),
             Err(e) => Err(ToolError::ExecutionError(format!(
                 "Failed to create job: {}",