feat: add feature key for preference lookup

lib/captain/base_task_service.rb

@@ -25,6 +25,14 @@ class Captain::BaseTaskService
     raise NotImplementedError, "#{self.class} must implement #event_name"
   end
 
+  def feature_key
+    raise NotImplementedError, "#{self.class} must implement #feature_key"
+  end
+
+  def configured_model
+    account.public_send("captain_#{feature_key}_model")
+  end
+
   def conversation
     @conversation ||= account.conversations.find_by(display_id: conversation_display_id)
   end

lib/captain/follow_up_service.rb

@@ -95,4 +95,8 @@ class Captain::FollowUpService < Captain::BaseTaskService
   def event_name
     'follow_up'
   end
+
+  def feature_key
+    'editor'
+  end
 end

lib/captain/label_suggestion_service.rb

@@ -87,6 +87,10 @@ class Captain::LabelSuggestionService < Captain::BaseTaskService
     'label_suggestion'
   end
 
+  def feature_key
+    'label_suggestion'
+  end
+
   def build_follow_up_context?
     false
   end

lib/captain/reply_suggestion_service.rb

@@ -15,4 +15,8 @@ class Captain::ReplySuggestionService < Captain::BaseTaskService
   def event_name
     'reply_suggestion'
   end
+
+  def feature_key
+    'editor'
+  end
 end

lib/captain/rewrite_service.rb

@@ -56,4 +56,8 @@ class Captain::RewriteService < Captain::BaseTaskService
   def event_name
     operation
   end
+
+  def feature_key
+    'editor'
+  end
 end

lib/captain/summary_service.rb

@@ -16,4 +16,8 @@ class Captain::SummaryService < Captain::BaseTaskService
   def event_name
     'summarize'
   end
+
+  def feature_key
+    'editor'
+  end
 end

spec/lib/captain/base_task_service_spec.rb

@@ -15,6 +15,10 @@ RSpec.describe Captain::BaseTaskService do
       def event_name
         'test_event'
       end
+
+      def feature_key
+        'editor'
+      end
     end
   end
 
@@ -46,6 +50,29 @@ RSpec.describe Captain::BaseTaskService do
     end
   end
 
+  describe '#feature_key' do
+    it 'raises NotImplementedError for base class' do
+      base_service = described_class.new(account: account, conversation_display_id: conversation.display_id)
+      expect { base_service.send(:feature_key) }.to raise_error(NotImplementedError, /must implement #feature_key/)
+    end
+
+    it 'returns custom feature key in subclass' do
+      expect(service.send(:feature_key)).to eq('editor')
+    end
+  end
+
+  describe '#configured_model' do
+    it 'returns the configured model for the feature_key' do
+      expect(account).to receive(:captain_editor_model).and_return('gpt-5.1')
+      expect(service.send(:configured_model)).to eq('gpt-5.1')
+    end
+
+    it 'uses the default model when account model is not set' do
+      allow(account).to receive(:captain_editor_model).and_return('gpt-4.1-mini')
+      expect(service.send(:configured_model)).to eq('gpt-4.1-mini')
+    end
+  end
+
   describe '#conversation' do
     it 'finds conversation by display_id' do
       expect(service.send(:conversation)).to eq(conversation)