This week we've shipped input processors for agents, bulk message deletion, voice features in playground, and other performance improvements across the board.
Let's dive in:
Input Processors for Agents
We've added a middleware system for agents that lets you filter, transform, validate, and even terminate messages before they reach the language model.
Message processors enable:
- Pre-flight validation and filtering
- Message transformation and enrichment
- Early termination based on custom logic
- Built-in processors with full tracing support
This gives you fine-grained control over what your agents see and how they respond.
Read more about input processors in our deep dive.
Bulk Message Deletion
We shipped a flexible deleteMessages method. You can now delete single or multiple messages at once.
This is perfect for managing conversation history and keeping your memory stores clean.
Voice Features in Playground
The playground now supports both Text-to-Speech and Speech-to-Text functionality!
- TTS: Convert agent responses to natural speech
- STT: Use voice input to interact with your agents
Memory & Storage Improvements
Thread Management
We've improved thread creation to prevent orphaned threads — threads are now only saved after successful message generation. This keeps your memory stores clean and prevents failed attempts from cluttering your data.
Thread Sorting
Both getThreadsByResourceId and getThreadsByResourceIdPaginated now sort results by updatedAt. This breaking change ensures you always see the most recently active threads first.
Hybrid Search for Upstash
The Upstash vector store now supports hybrid search, combining semantic (dense) and keyword-based (sparse) vector search. This gives you the best of both worlds while maintaining backward compatibility with dense-only indexes.
Developer Experience Improvements
Better Error Messages
We've added clearer error messages across the board:
- Agent memory now explicitly states when both
resourceIdandthreadIdare required registerApiRouteprovides better guidance for invalid configurations- Telemetry warnings when enabled but not loaded
Message Metadata Support
Both the client-js SDK and agents now support message metadata for UIMessages—unlocking salient contextual information for your applications.
For the complete list of changes and fixes, check out the full release notes.