feat: support include tools feature to system prompt (#68)

Author: OskarStark

README.md

@@ -48,6 +48,7 @@ llm_chain:
                 name: 'GPT'
                 version: 'gpt-4o-mini'
             system_prompt: 'You are a helpful assistant that can answer questions.' # The default system prompt of the chain
+            include_tools: true # Include tool definitions at the end of the system prompt 
             tools:
                 - 'PhpLlm\LlmChain\Chain\ToolBox\Tool\SimilaritySearch'
         research:

src/DependencyInjection/Configuration.php

@@ -77,6 +77,10 @@ public function getConfigTreeBuilder(): TreeBuilder
                                 ->defaultNull()
                                 ->info('The default system prompt of the chain')
                             ->end()
+                            ->booleanNode('include_tools')
+                                ->info('Include tool definitions at the end of the system prompt')
+                                ->defaultFalse()
+                            ->end()
                             ->arrayNode('tools')
                                 ->addDefaultsIfNotSet()
                                 ->treatFalseLike(['enabled' => false])

src/DependencyInjection/LlmChainExtension.php

@@ -296,6 +296,11 @@ private function processChainConfig(string $name, array $config, ContainerBuilde
                 ->setAutowired(true)
                 ->setArgument('$systemPrompt', $config['system_prompt']);
 
+            if ($config['include_tools']) {
+                $systemPromptInputProcessorDefinition
+                    ->setArgument('$toolBox', new Reference('llm_chain.toolbox.'.$name));
+            }
+
             $inputProcessors[] = $systemPromptInputProcessorDefinition;
         }