diff --git a/lib/smart_proxy_dynflow/continuous_output.rb b/lib/smart_proxy_dynflow/continuous_output.rb
index 5bfa511..453da90 100644
--- a/lib/smart_proxy_dynflow/continuous_output.rb
+++ b/lib/smart_proxy_dynflow/continuous_output.rb
@@ -37,18 +37,20 @@ def humanize
       raw_outputs.map { |output| output['output'] }.join("\n")
     end
 
-    def add_exception(context, exception, timestamp = Time.now.getlocal)
-      add_output(context + ": #{exception.class} - #{exception.message}", 'debug', timestamp)
+    def add_exception(context, exception, timestamp: Time.now.getlocal, id: nil)
+      add_output(context + ": #{exception.class} - #{exception.message}", 'debug', timestamp: timestamp, id: id)
     end
 
-    def add_output(*args)
-      add_raw_output(self.class.format_output(*args))
+    def add_output(...)
+      add_raw_output(self.class.format_output(...))
     end
 
-    def self.format_output(message, type = 'debug', timestamp = Time.now.getlocal)
-      { 'output_type' => type,
-        'output' => message,
-        'timestamp' => timestamp.to_f }
+    def self.format_output(message, type = 'debug', timestamp: Time.now.getlocal, id: nil)
+      base = { 'output_type' => type,
+               'output' => message,
+               'timestamp' => timestamp.to_f }
+      base['id'] = id if id
+      base
     end
   end
 end
diff --git a/lib/smart_proxy_dynflow/runner/base.rb b/lib/smart_proxy_dynflow/runner/base.rb
index ac5341a..372e9e7 100644
--- a/lib/smart_proxy_dynflow/runner/base.rb
+++ b/lib/smart_proxy_dynflow/runner/base.rb
@@ -58,8 +58,8 @@ def timeout_interval
         #   or nil for no timeout
       end
 
-      def publish_data(data, type)
-        @continuous_output.add_output(data, type)
+      def publish_data(...)
+        @continuous_output.add_output(...)
       end
 
       def publish_exception(context, exception, fatal = true)
diff --git a/lib/smart_proxy_dynflow/runner/parent.rb b/lib/smart_proxy_dynflow/runner/parent.rb
index fe81dd7..61955f9 100644
--- a/lib/smart_proxy_dynflow/runner/parent.rb
+++ b/lib/smart_proxy_dynflow/runner/parent.rb
@@ -35,16 +35,16 @@ def host_action(identifier)
         Dynflow::Action::Suspended.new OpenStruct.new(options)
       end
 
-      def broadcast_data(data, type)
-        @outputs.each_value { |output| output.add_output(data, type) }
+      def broadcast_data(...)
+        @outputs.each_value { |output| output.add_output(...) }
       end
 
       def publish_data(_data, _type)
         true
       end
 
-      def publish_data_for(identifier, data, type)
-        @outputs[identifier].add_output(data, type)
+      def publish_data_for(identifier, data, type, **kwargs)
+        @outputs[identifier].add_output(data, type, **kwargs)
       end
 
       def dispatch_exception(context, exception)
diff --git a/test/runner_test.rb b/test/runner_test.rb
index 3961021..7fc034d 100644
--- a/test/runner_test.rb
+++ b/test/runner_test.rb
@@ -19,7 +19,8 @@ class RunnerTest < Minitest::Spec
           it 'returns a hash with outputs' do
             message = 'a message'
             type = 'stdout'
-            runner.publish_data(message, type)
+            now = Time.now
+            runner.publish_data(message, type, timestamp: now)
             updates = runner.generate_updates
             _(updates.keys).must_equal [suspended_action]
             update = updates.values.first
@@ -27,6 +28,30 @@ class RunnerTest < Minitest::Spec
             _(update.continuous_output.raw_outputs.count).must_equal 1
           end
 
+          it 'accepts timestamp' do
+            now = Time.now
+            runner.publish_data('message', 'stdout')
+            update = runner.generate_updates.values.first
+            _(update.continuous_output.raw_outputs.first['timestamp']).must_be_instance_of Float
+            _(update.continuous_output.raw_outputs.first['timestamp']).wont_equal now.to_f
+
+            runner.publish_data('message', 'stdout', timestamp: now)
+            update = runner.generate_updates.values.first
+            _(update.continuous_output.raw_outputs.first['timestamp']).must_be_instance_of Float
+            _(update.continuous_output.raw_outputs.first['timestamp']).must_equal now.to_f
+          end
+
+          it 'accepts id' do
+            runner.publish_data('message', 'stdout')
+            update = runner.generate_updates.values.first
+            _(update.continuous_output.raw_outputs.first.key?('id')).must_equal false
+
+            id = 5
+            runner.publish_data('message', 'stdout', id: id)
+            update = runner.generate_updates.values.first
+            _(update.continuous_output.raw_outputs.first['id']).must_equal id
+          end
+
           it 'works in compatibility mode' do
             runner = Base.new
             message = 'a message'
@@ -80,6 +105,30 @@ class RunnerTest < Minitest::Spec
             runner.publish_data_for('foo', 'message', 'stdout')
             _(runner.generate_updates.keys.count).must_equal 1
           end
+
+          it 'accepts timestamp' do
+            now = Time.now
+            runner.publish_data_for('foo', 'message', 'stdout')
+            update = runner.generate_updates.values.first
+            _(update.continuous_output.raw_outputs.first['timestamp']).must_be_instance_of Float
+            _(update.continuous_output.raw_outputs.first['timestamp']).wont_equal now.to_f
+
+            runner.publish_data_for('foo', 'message', 'stdout', timestamp: now)
+            update = runner.generate_updates.values.first
+            _(update.continuous_output.raw_outputs.first['timestamp']).must_be_instance_of Float
+            _(update.continuous_output.raw_outputs.first['timestamp']).must_equal now.to_f
+          end
+
+          it 'accepts id' do
+            runner.publish_data_for('foo', 'message', 'stdout')
+            update = runner.generate_updates.values.first
+            _(update.continuous_output.raw_outputs.first.key?('id')).must_equal false
+
+            id = 5
+            runner.publish_data_for('foo', 'message', 'stdout', id: id)
+            update = runner.generate_updates.values.first
+            _(update.continuous_output.raw_outputs.first['id']).must_equal id
+          end
         end
 
         describe '#broadcast_data' do
@@ -87,6 +136,42 @@ class RunnerTest < Minitest::Spec
             runner.broadcast_data('message', 'stdout')
             _(runner.generate_updates.keys.count).must_equal 2
           end
+
+          it 'accepts timestamp' do
+            now = Time.now
+            runner.broadcast_data('message', 'stdout')
+            updates = runner.generate_updates.values
+            _(updates.count).must_equal 2
+            updates.each do |update|
+              _(update.continuous_output.raw_outputs.first['timestamp']).must_be_instance_of Float
+              _(update.continuous_output.raw_outputs.first['timestamp']).wont_equal now.to_f
+            end
+
+            runner.broadcast_data('message', 'stdout', timestamp: now)
+            updates = runner.generate_updates.values
+            _(updates.count).must_equal 2
+            updates.each do |update|
+              _(update.continuous_output.raw_outputs.first['timestamp']).must_be_instance_of Float
+              _(update.continuous_output.raw_outputs.first['timestamp']).must_equal now.to_f
+            end
+          end
+
+          it 'accepts id' do
+            runner.broadcast_data('message', 'stdout')
+            updates = runner.generate_updates.values
+            _(updates.count).must_equal 2
+            updates.each do |update|
+              _(update.continuous_output.raw_outputs.first.key?('id')).must_equal false
+            end
+
+            id = 5
+            runner.broadcast_data('message', 'stdout', id: id)
+            updates = runner.generate_updates.values
+            _(updates.count).must_equal 2
+            updates.each do |update|
+              _(update.continuous_output.raw_outputs.first['id']).must_equal id
+            end
+          end
         end
 
         describe '#publish_exception' do