🚀 LibreChat v0.8.8-rc4

What's Changed

🏞️ Highlights

Public Agents API with OpenAPI spec and docs
Caller-executed tools for the Open Responses API
GPT-6 Sol, GPT-6 Luna, and Claude Opus 5.5
Conversation-isolated attached workspaces with repository instructions
Expanded Trace Viewer with steps, roles, previews, and cost
Same-run Skill authoring and execution
System-event turns and single-row live activity
Faster streaming Markdown, model search, and Agent messages
Stronger MCP authentication and per-request headers

✨ Features

✨ feat: Client-Executed Function Tools for the Responses API by @alexkorep in #16078
🛍️ feat: Add Programming App to OpenRouter Categories by @lia-by-librechat in #16228
🌞 feat: Add GPT-6 Sol and Luna Support by @lia-by-librechat in #16221
🔐 feat: Support Cognito Access Tokens for Agent Management by @dustinhealy in #16224
🎹 feat: Add Claude Opus 5.5 Support by @danny-avila in #16215
⏲️ feat: Report a Background Task's Start, Settlement and Elapsed Time by @lia-by-librechat in #16193
🧑‍🚀 feat: Add Grok 4.7 Support Through xAI by @lia-by-librechat in #16173
🫧 feat: Hold a Live Run's Activity at One Row by @danny-avila in #16118
📟 feat: Render System Events as Distinct Turns by @danny-avila in #16119
💵 feat: Show Cost per Record, Step and Response in the Trace Ledger by @danny-avila in #16120
💌 feat: Authenticate RUM Proxy Exports by @lia-by-librechat in #16114
🐣 feat: Invoke Newly Authored Skills in the Same Run by @lia-by-librechat in #16036
🌳 feat: Isolate Attached Workspaces by Conversation by @danny-avila in #16107
💬 feat: Read a Model Call as a Conversation in the Trace Viewer by @danny-avila in #16103
🗣️ feat: Trace Viewer Roles, Agent Identity and Tool Rounds by @danny-avila in #16098
⛽ feat: Negotiate Background Command Timeouts by @danny-avila in #16100
🪜 feat: Trace Viewer Steps, Sequence Scale and Previews by @danny-avila in #16009
📪 feat: Send Per-Request MCP Headers Without Hiding the Tool Catalog by @lia-by-librechat in #15988
🔌 feat: OpenAPI spec and docs for the public Agents API by @AtefBellaaj in #15928
📖 Load Repository Instructions for Attached Workspaces by @danny-avila in #16008
🪪 feat: Pass Schedule Identity to MCP Token Providers by @danny-avila in #15962

🐛 Fixes

🩼 fix: Keep OpenRouter Category Override Test Type-Safe by @lia-by-librechat in #16229
🔍 fix: Enable File Search When Attaching From the Files Panel by @jtodaroii in #16223
🎽 fix: Give Each Streamed Tool Call a Stable Outward Index by @lia-by-librechat in #16209
🎰 fix: Show Live Tool Combo Multipliers by @lia-by-librechat in #16202
⛲ fix: Prevent Agent Model Stream Idle Timeouts by @lia-by-librechat in #16201
🥫 fix: Normalize Legacy MCP Header Maps on Cached Reads by @lia-by-librechat in #16200
🫥 fix: Preserve Absent MCP Header Maps Across Database Saves by @lia-by-librechat in #16194
🍴 fix: Split Combined Bit Updates in ACL Permission Writes by @lia-by-librechat in #16172
🚥 fix: Preserve Insights With Guarded ACL Role Updates by @lia-by-librechat in #16170
🏦 fix: Require Named Helm Credential Secrets by @lia-by-librechat in #16175
🎈 fix: Fill Reasoning Previews Before Throttling by @lia-by-librechat in #16178
⏹️ fix: Cancel Stale Throttled Scroll Callbacks by @minwookshin in #16167
🧻 fix: Unblock Conversation Deletion After Queued Turns by @lia-by-librechat in #16174
🔤 fix: Validate MIME Patterns With the Active Regex Engine by @lia-by-librechat in #16177
📯 fix: Explain Tenant Index Migration on Startup Conflicts by @lia-by-librechat in #16176
📝 fix: Preserve Chat Drafts Across Navigation and Clearing by @danny-avila in #16161
🔂 fix: Reuse Redis Caches Without Changing TTLs by @lia-by-librechat in #16154
🪑 fix: Preserve Tool Pane Choices Through Response Finalization by @lia-by-librechat in #16152
✒️ fix: Persist a Generated Title Before the Turn Ends by @lia-by-librechat in #16137
🌁 fix: Stop Painting the Closed Mobile Drawer by @lia-by-librechat in #16127
📠 fix: Preview SVG Artifacts From Their Edited Source by @lia-by-librechat in #16123
🖼️ fix: Resolve Pinned Model Icons from Endpoint Config by @jtodaroii in #16089
✒️ fix: Render Code in the Bundled Monospace Font by @lia-by-librechat in #16146
🫧 fix: Stop the Live Activity Row From Flashing Open on Code Calls and Thoughts by @danny-avila in #16145
🚷 fix: Isolate Jina Credential Provenance by @danny-avila in #16134
🪢 fix: Bind Preserved MCP API Keys to Server Configuration by @danny-avila in #16136
⚓ fix: Keep a Resumed Compaction Anchored to the Turn It Summarizes by @lia-by-librechat in #16037
🕳️ fix: Repair Legacy Meili Cleanup Index by @danny-avila in #16133
☔ fix: Preserve MCP Authorization During Token Endpoint Outages by @lia-by-librechat in #16126
🎽 fix: Hand Same-Batch Code Calls the Files a Skill Just Loaded by @lia-by-librechat in #16115
🥢 fix: Exclude Prompt Inputs From Terminal Events by @lia-by-librechat in #16112
🥖 fix: Refresh MCP Credentials That Arrive Already Expired by @lia-by-librechat in #16111
🧺 fix: Bound Background Completion Batches by @danny-avila in #16102
📬 fix: Persist Background Results Before Parent Rows by @danny-avila in #16101
📬 fix: Deliver Same-Turn Background Results by @danny-avila in #16097
🔑 fix: Stringify Ban Cache Keys When Redis Is Off by @gokay-ai in #16039
🗂️ fix: Keep a Running Attachment Chat in the Sidebar by @danny-avila in #16104
🥾 fix: Define Code Execution Persistence Boundaries by @danny-avila in #16099
📄 fix: Send Textual Documents to Claude Through Gateways as Text by @mihidumh in #16055
🎱 fix: Stop Sealing a Code Environment Decision a Chat Never Made by @lia-by-librechat in #16056
🫗 fix: Roll Back Incomplete Skill Archive Imports by @lia-by-librechat in #16052
📤 fix(langfuse): support documented media upload types by @upman in #16079
🎟️ fix: Preserve BYOM Tool Calls Through Capacity Windows by @danny-avila in #16060
📱 fix: Open Sign-In and External Links From iOS Home-Screen Apps by @danny-avila in #16077
🗾 fix: Route Cross-Region Attachments Through CloudFront by @upman in #16082
📱 fix: Fit the Tool Library and Skills Pickers to Small Screens by @berry-13 in #16067
🔑 fix: Ask for MCP Sign-In When a Server Rejects Refreshed Tokens by @danny-avila in #16075
🔓 fix: Stop Code Outputs and Tool-Routed Spreadsheets From Locking Threads by @danny-avila in #16058
🥡 fix: Delete Storage and Embeddings With Owned Agent Files by @lia-by-librechat in #16007
👛 fix: Drop Unread Credentials From MCP Domain Validation by @SpectralOne in #16035
🗼 fix: Serialize MCP OAuth Token Refresh Across Replicas by @lia-by-librechat in #15993
🗣️ fix: Keep Provider Error Text on Unclassified Agent Failures by @berry-13 in #16034
🌐 fix(locales): correct English setting descriptions by @simpleqt in #16023
📭 fix: Deliver Attachment Text Until a File Tool Holds It by @lia-by-librechat in #16027
📖 fix: Verify Agents OpenAPI contracts and disable external reporting by @dustinhealy in #16028
🖨️ fix: Regenerate the Agents OpenAPI Spec With repositoryInstructions by @lia-by-librechat in #16029
🏛️ fix: Resolve Global Access Roles for Tenant Owner Grants by @lia-by-librechat in #15986
🪑 fix: Explain Workspace Capacity Timeouts by @danny-avila in #16016
🔅 fix: Theme the Tool Approval Decision Fields by @lia-by-librechat in #16014
🛎️ fix: Route Background Tool Handoffs by @danny-avila in #15990
🪒 fix: Strip Cache-Bust Suffixes From Every Local File Read by @lia-by-librechat in #15991
🎚️ fix: Allow Opting Out of the MCP OAuth resource Parameter by @lia-by-librechat in #15982
⛓️ fix: Bind Programmatic Bash to Selected Workspaces by @danny-avila in #15992
⏮️ fix: Keep the Last Keystrokes When a Run Finishes by @lia-by-librechat in #15987
📓 fix: Keep Typed Text When Starting a New Chat by @lia-by-librechat in #15985
🧦 fix: Restore OpenID Refresh After the Session Store TTL Expires by @lia-by-librechat in #15983
👆 fix: Thumb-Sized Send Button on Touch Devices by @lia-by-librechat in #15979
🪃 fix: Remember the Last Code Approval Mode by @lia-by-librechat in #15973
🧱 fix: Keep Streamed Content When a Turn Fails by @danny-avila in #15961
🍯 fix: Stop Approval Pauses From Unsealing Code Environments by @danny-avila in #15963

🔧 Refactoring and Performance

🐾 style: Show the Multiplier Only on a Generic Tool Line by @lia-by-librechat in #16225
🧑‍🤝‍🧑 style: Seat the Live Multiplier Beside Its Status Line by @lia-by-librechat in #16220
🛋️ perf: Discover MCP Tools Only When Needed by @lia-by-librechat in #16190
⚡ perf: Throttle Code Highlighting While a Message Streams by @berry-13 in #16073
🖍️ perf: Highlight Tool Code Once, and Only When Its Pane Is Open by @danny-avila in #16143
⚡ perf: Virtualize the Model Selector's Search Results by @berry-13 in #16074
⚡ perf: Preserve Message References in the Content Handler by @berry-13 in #16072
⚡ perf: Exclude Agent Version History From Default getAgent Reads by @berry-13 in #16070
⚡ perf: Split Streaming Markdown Blocks Incrementally by @berry-13 in #16071
✂️ refactor: Name Tool Rounds From the Trace, and Match a Cut Response From Its End by @danny-avila in #16113
🎫 perf: Limit Redis Script Caching to Atomic Claims by @lia-by-librechat in #16116
🚐 perf: Enable Redis Stream Coalescing by Default by @lia-by-librechat in #16093
🌓 refactor: Scrim OGDialog With the Overlay Theme Role by @berry-13 in #16068
🪶 perf: Cut the Mount Cost of Finished Agent Messages by @danny-avila in #16057
⚗️ refactor: Separate Content, Tool, and Agent Types From the Assistants Module by @lia-by-librechat in #15910

🧪 Tests

📷 test: Capture Revision-Pinned PR Screenshot Evidence by @lia-by-librechat in #16191
🛌 test: Poll Instead of Sleeping for Dead Subagent Owner Expiry by @lia-by-librechat in #16144
📍 test: Add Deployed Smoke Profile by @danny-avila in #16135
🥊 test: Prove MCP Refresh Coordination Across Replica Processes by @lia-by-librechat in #16131
🫛 test: Separate an Authoring Run From a Skills-Off Run by @lia-by-librechat in #16128
🚥 test: Hold Group Cache Reads Until Concurrent Callers Arrive by @lia-by-librechat in #16059

📦 Dependencies, Chores & CI

🪞 ci: Mirror Published Images to a Legacy GHCR Namespace by @danny-avila in #16214
📦 chore: bump agents SDK to v3.9.1 by @danny-avila in #16212
🎩 docs: Set Expectations for AI-Assisted Contributions by @lia-by-librechat in #16207
🥢 ci: Select Quote Text Across the Streaming Fade's Word Spans by @lia-by-librechat in #16189
📋 docs: Clarify Type of Change and Screenshot Uploads in the PR Template by @berry-13 in #16165
🦾 chore: Bump Agents SDK to v3.9.0 by @danny-avila in #16142
📒 ci: Upload Per-Test Jest Results From Review Workflows by @danny-avila in #16110
📋 chore: Restructure Pull Request Template by @berry-13 in #16094

New Contributors

@minwookshin made their first contribution in #16167
@gokay-ai made their first contribution in #16039
@simpleqt made their first contribution in #16023

Full Changelog: v0.8.8-rc3...v0.8.8-rc4