MCP Servers

LangChain v1.2.15 is a minor release that includes a dependency update bumping aiohttp from version 3.13.3 to 3.13.4 in the langchain_v1 library. This patch addresses potential improvements or security fixes in the aiohttp HTTP client library. The release represents incremental maintenance work on the LangChain framework.

Claude Code v2.1.91 introduces MCP tool result persistence overrides supporting up to 500K characters, adds shell execution disabling options, enables multi-line prompts in deep links, and allows plugins to ship executables. The release includes critical fixes for transcript chain breaks, terminal key handling, plan mode persistence in remote sessions, and JSON schema validation, plus performance improvements and enhanced API guidance.

OpenClaw v2026.4.2 is a major release featuring significant architectural improvements including restoration of the core Task Flow substrate with managed sync modes, migration of plugin configurations (xAI and Firecrawl) from legacy core paths to plugin-owned paths, and numerous provider/channel fixes. Key additions include Android assistant integration, enhanced Matrix mentions, Feishu comment workflows, and centralized provider transport policy handling. The release includes breaking changes requiring config migration via `openclaw doctor --fix`.

Claude Code v2.1.90 introduces the `/powerup` interactive lesson feature, adds environment variable support for offline marketplace caching, and delivers significant bug fixes and performance improvements. Key fixes address rate-limit dialog crashes, prompt-cache misses with deferred tools, file editing conflicts, and auto-mode boundary violations. Performance enhancements include quadratic slowdown elimination in SDK sessions and SSE transport optimization.

OpenClaw v2026.4.1 is a maintenance and feature release introducing chat-native task boards, SearXNG web search integration, Amazon Bedrock Guardrails support, and enhanced channel features (Feishu comments, WhatsApp reactions, Telegram improvements). The release includes significant fixes for task management, execution approvals, session handling, and plugin runtime dependencies, with improved error handling and configuration flexibility across gateways, channels, and agent systems.

OpenClaw v2026.4.1-beta.1 introduces significant enhancements across chat, web search, cloud integrations, and channel management. Key additions include a native `/tasks` background task board, SearXNG web search provider, Amazon Bedrock Guardrails support, and improved Feishu document collaboration. The release also addresses critical fixes for task management, execution approvals, session routing, and channel-specific issues to improve stability and user experience.

Claude Code v2.1.89 is a major release introducing deferred permission decisions for headless sessions, flicker-free rendering, improved MCP connection handling, and numerous bug fixes across tool execution, file handling, and UI rendering. Key improvements include named subagents, enhanced auto-mode permission workflows, and fixes for critical issues like memory leaks, LSP crashes, and prompt cache misses in long sessions.

crewAI v1.13.0a3 introduces token usage tracking in LLM events and tool metadata publishing to AMP. The release includes bug fixes for GPT-5.x model compatibility, comprehensive documentation updates on SSO configuration and agent capabilities, and significant refactoring converting Flow and LLM classes to Pydantic BaseModel with improved type annotations.

OpenClaw v2026.3.31 is a major release introducing significant breaking changes to node execution, plugin SDK deprecations, and stricter security defaults for dangerous code scanning. Key improvements include a unified background task control plane, new channel integrations (QQ Bot), enhanced Matrix/MCP support, and security hardening across gateway authentication and node command execution. The release emphasizes safer defaults while expanding platform capabilities for agents, channels, and integrations.

OpenClaw v2026.3.31-beta.1 introduces significant breaking changes to node execution, plugin SDK deprecation, and stricter security defaults for plugin/skill installation. Key improvements include unified background task management with flow control, expanded channel support (QQ Bot), enhanced MCP capabilities with remote HTTP/SSE servers, and security hardening across gateway authentication, node commands, and event handling. Multiple channel-specific enhancements (Matrix, LINE, Teams, WhatsApp, Slack) and provider integrations (OpenAI Responses, Pi Codex, TTS diagnostics) round out the release.

LangChain v1.2.14 release includes security patches, performance improvements, and bug fixes. Key updates address CVE-2026-4539 via Pygments dependency upgrade, reduce initialization speed by 15%, fix recursion limit handling in create_agent, and improve token counter recognition for ChatAnthropicVertex. The release also updates dependencies, adds async implementations, and enhances Azure AI Foundry compatibility.

langchain-openrouter version 0.2.1 was released with a critical fix for passing attribution headers through httpx default_headers instead of the previous method. The release includes updated model profile data and a dependency bump for the requests library from 2.32.5 to 2.33.0. This patch addresses header handling in the OpenRouter integration for LangChain.

OpenClaw v2026.3.28 is a major release featuring breaking changes to Qwen OAuth migration and config validation, alongside significant enhancements including xAI Responses API integration, MiniMax image generation, async tool approval hooks, ACP channel bindings, and unified file upload actions across platforms. The release includes numerous bug fixes for Telegram splitting, WhatsApp echo loops, Mistral API compatibility, and security improvements for credential auditing.

OpenClaw v2026.3.28-beta.1 introduces significant breaking changes including removal of deprecated Qwen OAuth integration and stricter config validation, while adding major features like async tool approval hooks, MiniMax image generation, xAI search integration, and unified file upload actions across platforms. The release includes numerous fixes for Telegram message splitting, WhatsApp echo loops, image tool fallbacks, and security improvements for credential auditing.

Claude Code v2.1.86 is a maintenance release focused on stability, performance, and bug fixes. Key improvements include session tracking via headers, VCS exclusion enhancements, fixes for file operations outside project root, memory/performance optimizations, and corrections to UI interactions and plugin handling. The release also improves token efficiency through prompt caching and reduced overhead in file mentions.

Claude Code v2.1.85 introduces MCP server flexibility with environment variables for multi-server support, conditional hook execution to reduce overhead, and improved OAuth compliance with RFC 9728. The release includes significant bug fixes for context management, plugin handling, terminal compatibility, and streaming performance, plus enhancements to file autocomplete and scroll performance on large transcripts.

CrewAI 1.12.0 introduces significant enhancements including Qdrant Edge storage backend, native OpenAI-compatible provider support (OpenRouter, DeepSeek, Ollama, vLLM, Cerebras, Dashscope), agent skills implementation, and automatic root_scope for hierarchical memory isolation. The release adds Arabic language support, a new docs-check CLI command, logout functionality, and resolves multiple bugs across type checking, HITL flow system, and memory management. Documentation improvements include a new CONTRIBUTING.md guide and instructions for using CrewAI without LiteLLM.

Claude Code v2.1.84 introduces PowerShell tool support for Windows, enhanced environment variable controls for model configuration, new hooks for task and worktree creation, and numerous bug fixes and performance improvements. Key additions include idle timeout configuration, channel plugin allowlists, deep link improvements, and better MCP server handling. The release also addresses critical issues with voice input, workflow subagents, and terminal rendering while improving startup performance and prompt cache efficiency.

langchain-openrouter version 0.2.0 introduces the `app_categories` field for marketplace attribution and updates model profile data across multiple iterations. The release includes dependency bumps for langchain-core (minimum 1.2.21), schema validation improvements, and CI/CD optimizations. Key changes focus on enhancing model profile management, fixing missing ModelProfile fields, and improving the development workflow.

Claude Code v2.1.83 introduces significant improvements to policy management, environment reactivity, security, and user experience. Key additions include a drop-in directory for managed settings, new hook events for environment changes, transcript search functionality, and enhanced subprocess credential scrubbing. The release addresses numerous stability issues, performance regressions, and UI glitches while improving startup latency and memory usage across various platforms.