v2026.9.14 @mastra/core@1.67.0
livestorejs/livestoreSep 14, 2026 → Sep 15, 20261 day between releases
What's New
Adds persistent Workflow Builder backend, Thread Ownership Transfer, and renames `subscribeQueuedMessages` to `subscribeThreadEvents`.
Breaking Changes
- Renamed `subscribeQueuedMessages` to `subscribeThreadEvents`
- Renamed `ArchilFilesystem.grep` to `diskGrep`
New Features
- Studio Workflow Builder Backend with persisted workflows and editor-owned agent
- New `@mastra/connect` package for platform integrations
- Thread Ownership Transfer allowing threads to be reassigned
- Enhanced Background Tool Execution with foreground/deferred/awaited dispositions
- Workspace & Sandbox improvements including bulk file uploads and POSIX mode support
Improvements
- Workspace & Sandbox performance improvements with bulk file uploads and POSIX mode support
Upgrade Notes
Update code to use the new method names `subscribeThreadEvents` and `diskGrep`. The `ArchilFilesystem` class has been updated to use `diskGrep`.
The Two Releases
Hermes Agent v0.21.3 (v2026.9.14)
Sep 14, 2026· 1 month ago
Patch release rolling up 338 PRs to fix remote dashboard session expiration on refresh bursts and stop long-lived processes from leaking duplicate state.db writer handles. Introduces a server-to-client JSON-RPC registry and Pydantic wire-contract generation.
Full release notesSeptember 15, 2026
Sep 15, 2026· 1 month ago
This release introduces a persistent Studio Workflow Builder backend, a new @mastra/connect package for platform integrations, and Thread Ownership Transfer capabilities. It also enhances background tool execution controls and improves Workspace & Sandbox performance with bulk file uploads and POSIX permissions.
Full release notes