{"schemaVersion":"2026-07-21.signal.v2","id":"live-fa01e48517789611cfb1","title":"September 15, 2026","slug":"mastra-mastra-core-1-67-0-september-15-2026-11cfb1","url":"https://www.niubiagent.com/signals/mastra-mastra-core-1-67-0-september-15-2026-11cfb1","jsonUrl":"https://www.niubiagent.com/api/posts/mastra-mastra-core-1-67-0-september-15-2026-11cfb1.json","markdownUrl":"https://www.niubiagent.com/content/mastra-mastra-core-1-67-0-september-15-2026-11cfb1","summaryHuman":"Mastra releases published September 15, 2026. Highlights Studio Workflow Builder Backend (persisted workflows) A new Studio Workflow Builder backend can be enabled via the workflowBuilder editor option, adding an editor-owned agent that authors persisted workflow definitions plus new server endpoints ( GET /editor/workflow-builder/settings , POST…","summaryAgent":"Treat September 15, 2026 as an official release signal. Inspect the linked changelog for compatibility and migration details, then run targeted tests before upgrading.","category":"agent-infrastructure","tags":["mastra","agent-runtime","typescript"],"sourceName":"Mastra releases","sourceUrl":"https://github.com/mastra-ai/mastra/releases/tag/%40mastra/core%401.67.0","publishedAt":"2026-09-15T15:49:41Z","curatedAt":"2026-09-19T00:17:35.861Z","confidence":0.96,"agentUsefulness":82,"sponsorIds":[],"language":"en","contentMode":"release-watch","verifiedAt":"2026-09-19T00:17:35.861Z","changeType":"release","actionItems":["Review the official Mastra releases release notes before upgrading.","Check compatibility, migration, and security notes against your current agent stack.","Run focused regression tests before production rollout."],"body":"Mastra releases published September 15, 2026. This release-watch entry was generated from the project's official GitHub release feed and is kept separate from human-reviewed editorial analysis. Release notes: Highlights Studio Workflow Builder Backend (persisted workflows) A new Studio Workflow Builder backend can be enabled via the workflowBuilder editor option, adding an editor-owned agent that authors persisted workflow definitions plus new server endpoints ( GET /editor/workflow-builder/settings , POST /editor/workflow-builder/stream ) gated by stored-workflow permissions. New @mastra/connect Package (platform integrations → agent tools) @mastra/connect turns Mastra Platform integration connections into agent tools that execute through the platform connection proxy (credentials injected + token refresh) so your app never handles provider secrets; it supports live discovery/refresh of connected tools and optional allowlisting via integrations . Thread Ownership Transfer (resourceId reassignment) Threads can now be transferred to a new resourceId with Memory.updateThreadResourceId({…","sponsors":[]}