🚀 LibreChat v0.8.3-rc1

What's Changed

✨ Features

• 🦥 Event-Driven Lazy Tool Loading by @danny-avila in #11588
• 📉 Add Token Usage Tracking for Agents API Routes by @danny-avila in #11600
• 🎯 Add Programmatic Tool Calling UI for MCP Tools by @danny-avila in #11604
• 🌙 Moonshot Provider Support by @danny-avila in #11621
• 📬 Implement Delta Buffering System for Out-of-Order SSE Events by @danny-avila in #11643
• 🤖 Claude Opus 4.6 - 1M Context, Premium Pricing, Adaptive Thinking by @danny-avila in #11670
• 🎮 Bedrock Parameters for OpenAI GPT-OSS models by @danny-avila in #11798
• 🛰️ Add Bedrock Parameter Settings for MoonshotAI and Z.AI Models by @danny-avila in #11783
• 🤖 Claude Sonnet 4.6 support by @danny-avila in #11829
• 🎭 Override Custom Endpoint Schema with Specified Params Endpoint by @danny-avila in #11788
• 🏎️ Smart Reinstall with Turborepo Caching for Better DX by @danny-avila in #11785
• 💎 Add Redis as Optional Sub-chart Dependency in Helm Chart by @SharpLu in #11664
• ⛵ Expose enableServiceLinks in Helm Deployment Templates by @bhat-ganesh in #11741
• 🔧 deleteRagFile utility for Consistent RAG API document deletion by @ethanlaj in #11493

🐛 Fixes

• 🔐 MCP OAuth Tool Discovery and Event Emission by @danny-avila in #11599
• 🔦 Tool resource files not visible in event-driven mode by @usnavy13 in #11610
• 👆 Web Search and Code Interpreter Toggle Cursor Hover Behavior by @dustinhealy in #11614
• 📱 Mention Touch UX and MCP Tool UI Consistency by @danny-avila in #11627
• 🛡️ Preserve CREATE/SHARE/SHARE_PUBLIC Permissions with Boolean Config by @danny-avila in #11647
• 🗣️ Add Various State Change Announcements by @dustinhealy in #11495
• 🎬 Code Session Context In Event Driven Mode by @danny-avila in #11673
• 🆔 Atomic File Dedupe, Bedrock Tokens Fix, and Allowed MIME Types by @danny-avila in #11675
• 🌊 Prevent Truncations When Redis Resumable Streams Are Enabled by @danny-avila in #11710
• 🪟 Update Link Target to Open in Separate Tabs by @flyinggrizzly in #11669
• 🔧 Update z-index for ImagePreview Dialog by @danny-avila in #11714
• 🛡️ Implement TOCTOU-Safe SSRF Protection for Actions and MCP by @danny-avila in #11722
• 🛡️ Secure MCP/Actions OAuth Flows, Resolve Race Condition & Tool Cache Cleanup by @danny-avila in #11756
• 🏁 Resolve Content Aggregation Race Condition in Agent Event Handlers by @danny-avila in #11757
• 🔎 Include Legacy Documents With Undefined _meiliIndex in Search Sync by @ablizorukov in #11745
• 🔒 Prevent Race Condition in RedisJobStore by @danny-avila in #11764
• 🦙 Memory Agent Fails to Initialize with Ollama Provider by @calkeo in #11680
• 🔒 Secure Cookie Localhost Bypass and OpenID Token Selection in AuthService by @danny-avila in #11782
• 🧰 Convert const to enum in MCP Schemas for Gemini Compatibility by @danny-avila in #11784
• 🪟 Tab Isolation for Agent Favorites + MCP Selections by @danny-avila in #11786
• 🕵️‍♂️ Handle 404 errors on agent queries for favorites by @ethanlaj in #11587
• 🏢 Handle Group Overage for Azure Entra Authentication by @WhammyLeaf in #11557
• 🌙 Accessible Contrast for Theme Switcher Icons by @dustinhealy in #11795
• 👻 Prevent Async Title Generation From Recreating Deleted Conversations by @danny-avila in #11797
• 🎛️ Google JSON Schema Normalization/Resolution Logic by @danny-avila in #11804
• 🪂 Handle MongoDB Connection Errors to Prevent Process Crashes by @SharpLu in #11809
• 🪪 Pass Scope in OpenID Refresh Token Grant for Azure Custom API by @seung-myung in #11770
• 🐛 Normalize output_text blocks in Responses API input conversion by @danny-avila in #11835
• 🪹 Prevent whitespace-only Chat input Submissions by @dobernike in #11838
• 🔗 Preserve Stream State Across Reconnects to Prevent Reorder Buffer Desync by @danny-avila in #11842
• 🧭 Robust 404 Conversation Not Found Redirect by @danny-avila in #11853
• 🧬 Backfill Missing SHARE Permissions and Migrate Legacy SHARED_GLOBAL Fields by @danny-avila in #11854
• 💡 System Theme Picker Selection by @dustinhealy in #11220

🔧 Refactoring

• 🧩 Tool Context Builders for Web Search & Image Gen by @danny-avila in #11644
• ✈️ Single-Flight Deduplication for MCP Server Configs and Optimize Redis Batch Fetching by @danny-avila in #11628
• 🔄 Sequential Event Ordering in Redis Streaming Mode by @danny-avila in #11650
• 🪙 Distinguish ID Tokens from Access Tokens in OIDC Federated Auth by @jlevy in #11711
• 🗃️ Separate Tool Cache Namespace for Blue/Green Deployments by @danny-avila in #11738
• 📳 Optimize Model Selector by @danny-avila in #11787
• 🗨️ Better Whitespace handling in Chat Message rendering by @danny-avila in #11791
• 🗂️ Artifacts via Model Specs & Scope Badge Persistence by Spec Context by @danny-avila in #11796
• 🥠 Always set OIDC refresh token cookie to survive session expiry by @danny-avila in #11810
• 🪆 Internalize Producer Event Handling into Agent Graph Context by @danny-avila in #11816
• ⚛️ Redis Scalability Improvements for High-Throughput Deployments by @danny-avila in #11840
• ♻️ On-demand MCP connections: remove proactive reconnect, default to available by @danny-avila in #11839

⚙️ Other Changes

• 🗑️ Remove Dev Artifacts for Deferred Tools Capability by @danny-avila in #11601
• 🔓 Comment Out MCP Permissions in librechat.example.yaml by @dustinhealy in #11620
• ⚠️ Remove Deprecated forcePrompt setting by @danny-avila in #11622
• 🎭 Padding to Maskable Icon for Android adaptive icons by @hellojaccc in #11626
• 🪢 Add Langfuse to .env.example by @jannikmaierhoefer in #11632
• 🧽 Remove deprecated Claude models from Default List by @saneroen in #11639
• 🔱 Harden API Routes Against IDOR and DoS Attacks by @danny-avila in #11760
• ♿ Enhance MCP dialog accessibility and styling consistency by @berry-13 in #11585
• 📋 Document Uncaught Exception Config and Fix Empty Text Export by @danny-avila in #11812
• 📦 Bump @librechat/agents to v3.1.33–v3.1.45, @modelcontextprotocol/sdk to v1.26.0, axios, fast-xml-parser, and other dependencies by @danny-avila in #11606, #11623, #11630, #11636, #11665, #11723, #11759, #11790, #11805, #11811, #11815, #11836, #11841

🌍 Internationalization

• 🌍 i18n: Support for Icelandic, Lithuanian, Nynorsk and Slovak languages by @berry-13 in #11649
• 🌍 i18n: Update translation.json with latest translations by @github-actions[bot] in #11655, #11672, #11739, #11813, #11831

New Contributors

• @hellojaccc made their first contribution in #11626
• @jannikmaierhoefer made their first contribution in #11632
• @saneroen made their first contribution in #11639
• @flyinggrizzly made their first contribution in #11669
• @jlevy made their first contribution in #11711
• @calkeo made their first contribution in #11680
• @bhat-ganesh made their first contribution in #11741
• @seung-myung made their first contribution in #11770
• @dobernike made their first contribution in #11838

Full Changelog: https://github.com/danny-avila/LibreChat/compare/v0.8.2...v0.8.3-rc1