🔗 feat: Agent Chain (Mixture-of-Agents) (#6374)

* wip: first pass, dropdown for selecting sequential agents

* refactor: Improve agent selection logic and enhance performance in SequentialAgents component

* wip: seq. agents working ideas

* wip: sequential agents style change

* refactor: move agent form options/submission outside of AgentConfig

* refactor: prevent repeating code

* refactor: simplify current agent display in SequentialAgents component

* feat: persist  form value handling in AgentSelect component for agent_ids

* feat: first pass, sequential agnets agent update

* feat: enhance message display with agent updates and empty text handling

* chore: update Icon component to use EModelEndpoint for agent endpoints

* feat: update content type checks in BaseClient to use constants for better readability

* feat: adjust max context tokens calculation to use 90% of the model's max tokens

* feat: first pass, agent run message pruning

* chore: increase max listeners for abort controller to prevent memory leaks

* feat: enhance runAgent function to include current index count map for improved token tracking

* chore: update @librechat/agents dependency to version 2.2.5

* feat: update icons and style of SequentialAgents component for improved UI consistency

* feat: add AdvancedButton and AdvancedPanel components for enhanced agent settings navigation, update styling for agent form

* chore: adjust minimum height of AdvancedPanel component for better layout consistency

* chore: update @librechat/agents dependency to version 2.2.6

* feat: enhance message formatting by incorporating tool set into agent message processing, in order to allow better mix/matching of agents (as tool calls for tools not found in set will be stringified)

* refactor: reorder components in AgentConfig for improved readability and maintainability

* refactor: enhance layout of AgentUpdate component for improved visual structure

* feat: add DeepSeek provider to Bedrock settings and schemas

* feat: enhance link styling in mobile.css for better visibility and accessibility

* fix: update banner model import in update banner script; export Banner model

* refactor: `duplicateAgentHandler` to include tool_resources only for OCR context files

* feat: add 'qwen-vl' to visionModels for enhanced model support

* fix: change image format from JPEG to PNG in DALLE3 response

* feat: reorganize Advanced components and add localizations

* refactor: simplify JSX structure in AgentChain component to defer container styling to parent

* feat: add FormInput component for reusable input handling

* feat: make agent recursion limit configurable from builder

* feat: add support for agent capabilities chain in AdvancedPanel and update data-provider version

* feat: add maxRecursionLimit configuration for agents and update related documentation

* fix: update CONFIG_VERSION to 1.2.3 in data provider configuration

* feat: replace recursion limit input with MaxAgentSteps component and enhance input handling

* feat: enhance AgentChain component with hover card for additional information and update related labels

* fix: pass request and response objects to `createActionTool` when using assistant actions to prevent auth error

* feat: update AgentChain component layout to include agent count display

* feat: increase default max listeners and implement capability check function for agent chain

* fix: update link styles in mobile.css for better visibility in dark mode

* chore: temp. remove agents package while bumping shared packages

* chore: update @langchain/google-genai package to version 0.1.11

* chore: update @langchain/google-vertexai package to version 0.2.2

* chore: add @librechat/agents package at version 2.2.8

* feat: add deepseek.r1 model with token rate and context values for bedrock

api/server/services/ActionService.js

@@ -161,9 +161,9 @@ async function createActionTool({
 
       if (metadata.auth && metadata.auth.type !== AuthTypeEnum.None) {
         try {
-          const action_id = action.action_id;
-          const identifier = `${req.user.id}:${action.action_id}`;
           if (metadata.auth.type === AuthTypeEnum.OAuth && metadata.auth.authorization_url) {
+            const action_id = action.action_id;
+            const identifier = `${req.user.id}:${action.action_id}`;
             const requestLogin = async () => {
               const { args: _args, stepId, ...toolCall } = config.toolCall ?? {};
               if (!stepId) {

api/server/services/Config/getEndpointsConfig.js

@@ -72,4 +72,15 @@ async function getEndpointsConfig(req) {
   return endpointsConfig;
 }
 
-module.exports = { getEndpointsConfig };
+/**
+ * @param {ServerRequest} req
+ * @param {import('librechat-data-provider').AgentCapabilities} capability
+ * @returns {Promise<boolean>}
+ */
+const checkCapability = async (req, capability) => {
+  const endpointsConfig = await getEndpointsConfig(req);
+  const capabilities = endpointsConfig?.[EModelEndpoint.agents]?.capabilities ?? [];
+  return capabilities.includes(capability);
+};
+
+module.exports = { getEndpointsConfig, checkCapability };

api/server/services/Endpoints/agents/initialize.js

@@ -204,8 +204,7 @@ const initializeAgentOptions = async ({
     toolContextMap,
     maxContextTokens:
       agent.max_context_tokens ??
-      getModelMaxTokens(tokensModel, providerEndpointMap[provider]) ??
-      4000,
+      (getModelMaxTokens(tokensModel, providerEndpointMap[provider]) ?? 4000) * 0.9,
   };
 };
 
@@ -275,11 +274,13 @@ const initializeClient = async ({ req, res, endpointOption }) => {
 
   const client = new AgentClient({
     req,
+    res,
     sender,
     contentParts,
     agentConfigs,
     eventHandlers,
     collectedUsage,
+    aggregateContent,
     artifactPromises,
     agent: primaryConfig,
     spec: endpointOption.spec,

api/server/services/Endpoints/bedrock/initialize.js

@@ -55,6 +55,7 @@ const initializeClient = async ({ req, res, endpointOption }) => {
 
   const client = new AgentClient({
     req,
+    res,
     agent,
     sender,
     // tools,

api/server/services/Files/process.js

@@ -29,7 +29,7 @@ const { addAgentResourceFile, removeAgentResourceFiles } = require('~/models/Age
 const { getOpenAIClient } = require('~/server/controllers/assistants/helpers');
 const { createFile, updateFileUsage, deleteFiles } = require('~/models/File');
 const { loadAuthValues } = require('~/server/services/Tools/credentials');
-const { getEndpointsConfig } = require('~/server/services/Config');
+const { checkCapability } = require('~/server/services/Config');
 const { LB_QueueAsyncCall } = require('~/server/utils/queue');
 const { getStrategyFunctions } = require('./strategies');
 const { determineFileType } = require('~/server/utils');
@@ -457,17 +457,6 @@ const processFileUpload = async ({ req, res, metadata }) => {
   res.status(200).json({ message: 'File uploaded and processed successfully', ...result });
 };
 
-/**
- * @param {ServerRequest} req
- * @param {AgentCapabilities} capability
- * @returns {Promise<boolean>}
- */
-const checkCapability = async (req, capability) => {
-  const endpointsConfig = await getEndpointsConfig(req);
-  const capabilities = endpointsConfig?.[EModelEndpoint.agents]?.capabilities ?? [];
-  return capabilities.includes(capability);
-};
-
 /**
  * Applies the current strategy for file uploads.
  * Saves file metadata to the database with an expiry TTL.

api/server/services/ToolService.js

@@ -362,7 +362,12 @@ async function processRequiredActions(client, requiredActions) {
         continue;
       }
 
-      tool = await createActionTool({ action: actionSet, requestBuilder });
+      tool = await createActionTool({
+        req: client.req,
+        res: client.res,
+        action: actionSet,
+        requestBuilder,
+      });
       if (!tool) {
         logger.warn(
           `Invalid action: user: ${client.req.user.id} | thread_id: ${requiredActions[0].thread_id} | run_id: ${requiredActions[0].run_id} | toolName: ${currentAction.tool}`,