feat: Route reply box LLM tasks (2/6) (#14840)

# Pull Request Template

## Description

Routes OSS reply-box and small Captain tasks through feature-specific
LLM model resolution. Rewrite, reply suggestion, summary, follow-up, and
CSAT utility analysis now resolve through the `editor` feature; label
suggestion resolves through `label_suggestion`. Existing credentials,
account OpenAI hook behavior, and instrumentation event names remain
unchanged.

Linear: https://linear.app/chatwoot/issue/CW-7425/test-new-models
Depends on #14839

## Type of change

- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality not to work as expected)
- [ ] This change requires a documentation update

## How Has This Been Tested?

- `bundle exec rspec spec/lib/captain/base_task_service_spec.rb
spec/lib/captain/rewrite_service_spec.rb
spec/lib/captain/reply_suggestion_service_spec.rb
spec/lib/captain/summary_service_spec.rb
spec/lib/captain/label_suggestion_service_spec.rb
spec/lib/captain/csat_utility_analysis_service_spec.rb
spec/lib/captain/follow_up_service_spec.rb` passed with 81 examples, 0
failures.
- `bundle exec rubocop lib/captain/base_task_service.rb
lib/captain/rewrite_service.rb lib/captain/reply_suggestion_service.rb
lib/captain/summary_service.rb lib/captain/label_suggestion_service.rb
lib/captain/csat_utility_analysis_service.rb
lib/captain/follow_up_service.rb
enterprise/lib/enterprise/captain/reply_suggestion_service.rb
spec/lib/captain/base_task_service_spec.rb
spec/lib/captain/rewrite_service_spec.rb
spec/lib/captain/reply_suggestion_service_spec.rb
spec/lib/captain/summary_service_spec.rb
spec/lib/captain/label_suggestion_service_spec.rb
spec/lib/captain/csat_utility_analysis_service_spec.rb
spec/lib/captain/follow_up_service_spec.rb` passed with no offenses.
- `git diff --check` passed.

## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

enterprise/lib/enterprise/captain/reply_suggestion_service.rb

@@ -1,8 +1,8 @@
 module Enterprise::Captain::ReplySuggestionService
-  def make_api_call(model:, messages:, tools: [])
+  def make_api_call(messages:, model: nil, feature: nil, schema: nil, tools: [])
     return super unless use_search_tool?
 
-    super(model: model, messages: messages, tools: [build_search_tool])
+    super(messages: messages, model: model, feature: feature, schema: schema, tools: [build_search_tool])
   end
 
   private

lib/captain/base_task_service.rb

@@ -37,12 +37,13 @@ class Captain::BaseTaskService
     "#{endpoint}/v1"
   end
 
-  def make_api_call(model:, messages:, schema: nil, tools: [])
+  def make_api_call(messages:, model: nil, feature: nil, schema: nil, tools: [])
     # Community edition prerequisite checks
     # Enterprise module handles these with more specific error messages (cloud vs self-hosted)
     return { error: I18n.t('captain.disabled'), error_code: 403 } unless captain_tasks_enabled?
     return { error: I18n.t('captain.api_key_missing'), error_code: 401 } unless api_key_configured?
 
+    model = resolved_model(model: model, feature: feature)
     instrumentation_params = build_instrumentation_params(model, messages)
     instrumentation_method = tools.any? ? :instrument_tool_session : :instrument_llm_call
 
@@ -55,6 +56,12 @@ class Captain::BaseTaskService
     response.merge(follow_up_context: build_follow_up_context(messages, response))
   end
 
+  def resolved_model(model:, feature:)
+    return model if feature.blank?
+
+    Llm::FeatureRouter.resolve(feature: feature, account: account)[:model]
+  end
+
   def execute_ruby_llm_request(model:, messages:, schema: nil, tools: [])
     credential = llm_credential
 

lib/captain/csat_utility_analysis_service.rb

@@ -3,7 +3,7 @@ class Captain::CsatUtilityAnalysisService < Captain::BaseTaskService
 
   def perform
     api_response = make_api_call(
-      model: GPT_MODEL,
+      feature: 'editor',
       messages: [
         { role: 'system', content: system_prompt },
         { role: 'user', content: message }

lib/captain/follow_up_service.rb

@@ -33,7 +33,7 @@ class Captain::FollowUpService < Captain::BaseTaskService
       { role: 'user', content: user_message }
     ]
 
-    response = make_api_call(model: GPT_MODEL, messages: messages)
+    response = make_api_call(feature: 'editor', messages: messages)
     return response if response[:error]
 
     response.merge(follow_up_context: update_follow_up_context(user_message, response[:message]))

lib/captain/label_suggestion_service.rb

@@ -12,7 +12,7 @@ class Captain::LabelSuggestionService < Captain::BaseTaskService
 
     # Make API call
     response = make_api_call(
-      model: GPT_MODEL, # TODO: Use separate model for label suggestion
+      feature: 'label_suggestion',
       messages: [
         { role: 'system', content: prompt_from_file('label_suggestion') },
         { role: 'user', content: content }

lib/captain/reply_suggestion_service.rb

@@ -3,7 +3,7 @@ class Captain::ReplySuggestionService < Captain::BaseTaskService
 
   def perform
     make_api_call(
-      model: GPT_MODEL,
+      feature: 'editor',
       messages: [
         { role: 'system', content: system_prompt },
         { role: 'user', content: formatted_conversation }

lib/captain/rewrite_service.rb

@@ -36,7 +36,7 @@ class Captain::RewriteService < Captain::BaseTaskService
 
   def call_llm_with_prompt(system_content, user_content = content)
     make_api_call(
-      model: GPT_MODEL,
+      feature: 'editor',
       messages: [
         { role: 'system', content: system_content },
         { role: 'user', content: user_content }

lib/captain/summary_service.rb

@@ -3,7 +3,7 @@ class Captain::SummaryService < Captain::BaseTaskService
 
   def perform
     make_api_call(
-      model: GPT_MODEL,
+      feature: 'editor',
       messages: [
         { role: 'system', content: system_prompt },
         { role: 'user', content: conversation.to_llm_text(include_contact_details: false) }

spec/lib/captain/base_task_service_spec.rb

@@ -167,6 +167,17 @@ RSpec.describe Captain::BaseTaskService do
       service.send(:make_api_call, model: model, messages: messages)
     end
 
+    it 'uses the resolved feature model for the request and instrumentation' do
+      account.update!(captain_models: { 'editor' => 'gpt-4.1' })
+
+      expect(mock_context).to receive(:chat).with(model: 'gpt-4.1').and_return(mock_chat)
+      expect(service).to receive(:instrument_llm_call).with(
+        hash_including(model: 'gpt-4.1', feature_name: 'test_event')
+      ).and_call_original
+
+      service.send(:make_api_call, feature: 'editor', messages: messages)
+    end
+
     it 'returns formatted response with tokens' do
       result = service.send(:make_api_call, model: model, messages: messages)
 

spec/lib/captain/csat_utility_analysis_service_spec.rb

@@ -25,6 +25,14 @@ RSpec.describe Captain::CsatUtilityAnalysisService do
       expect(result[:optimized_message]).to eq('Utility-safe message')
       expect(result[:message]).to eq('{"classification":"LIKELY_UTILITY","optimized_message":"Utility-safe message"}')
     end
+
+    it 'routes through the editor feature' do
+      expect(service).to receive(:make_api_call).with(
+        hash_including(feature: 'editor')
+      ).and_return({ message: '{"classification":"LIKELY_UTILITY"}' })
+
+      service.perform
+    end
   end
 
   describe '#api_key' do

spec/lib/captain/follow_up_service_spec.rb

@@ -42,6 +42,7 @@ RSpec.describe Captain::FollowUpService do
     context 'when follow-up context exists' do
       it 'constructs messages array with full conversation history' do
         expect(service).to receive(:make_api_call) do |args|
+          expect(args[:feature]).to eq('editor')
           messages = args[:messages]
 
           expect(messages).to match(

spec/lib/captain/label_suggestion_service_spec.rb

@@ -58,6 +58,7 @@ RSpec.describe Captain::LabelSuggestionService do
 
       it 'builds labels_with_messages format correctly' do
         expect(service).to receive(:make_api_call) do |args|
+          expect(args[:feature]).to eq('label_suggestion')
           user_message = args[:messages].find { |m| m[:role] == 'user' }[:content]
 
           expect(user_message).to include('Messages:')

spec/lib/captain/reply_suggestion_service_spec.rb

@@ -30,6 +30,12 @@ RSpec.describe Captain::ReplySuggestionService do
   end
 
   describe '#perform' do
+    it 'routes through the editor feature' do
+      expect(Llm::FeatureRouter).to receive(:resolve).with(feature: 'editor', account: account).and_call_original
+
+      service.perform
+    end
+
     it 'returns the suggested reply' do
       result = service.perform
 

spec/lib/captain/rewrite_service_spec.rb

@@ -29,6 +29,7 @@ RSpec.describe Captain::RewriteService do
       expect(service).to receive(:prompt_from_file).with('fix_spelling_grammar').and_return('Fix errors')
 
       expect(service).to receive(:make_api_call) do |args|
+        expect(args[:feature]).to eq('editor')
         expect(args[:messages][0][:content]).to eq('Fix errors')
         expect(args[:messages][1][:content]).to eq(content)
         { message: 'Fixed' }
@@ -122,6 +123,7 @@ RSpec.describe Captain::RewriteService do
 
     it 'uses conversation context and draft message with Liquid template' do
       expect(service).to receive(:make_api_call) do |args|
+        expect(args[:feature]).to eq('editor')
         system_content = args[:messages][0][:content]
 
         expect(system_content).to include('Context:')

spec/lib/captain/summary_service_spec.rb

@@ -21,9 +21,9 @@ RSpec.describe Captain::SummaryService do
   end
 
   describe '#perform' do
-    it 'passes correct model to API' do
+    it 'routes through the editor feature' do
       expect(service).to receive(:make_api_call).with(
-        hash_including(model: Captain::BaseTaskService::GPT_MODEL)
+        hash_including(feature: 'editor')
       ).and_call_original
 
       service.perform