@mastra/core@1.75.0 @mastra/core@1.76.0
mastra-ai/mastraOct 7, 2026 → Oct 13, 20266 days between releases
What's New
Introduces crash recovery, atomic memory merges, and sandbox file handling.
Breaking Changes
- @mastra/playground-ui: Old Metrics card views/components were removed
- @mastra/playground-ui: MetricsCardGroup no longer accepts variant
- @mastra/playground-ui: MetricsLineChart dropped xAxisInterval and xAxisMinTickGap
New Features
- Durable agent run ownership and fencing for crash recovery
- Atomic working-memory merges on PostgreSQL with deep-merge support
- FileUploadProcessor for sandbox workflows
- Observational Memory now defaults to model: auto
- New observability nesting with nestUnderParent and trace search operators
Improvements
- Enhanced file-handling resilience with sandbox workflows
- Run fencing API to prevent state corruption
- Observational Memory auto-model selection as the new default
Bug Fixes
- Unsupported adapters now fail with a clear 400 instead of silently replacing records
Upgrade Notes
Update @mastra/playground-ui to handle the removal of old Metrics card views and deprecated props on MetricsCardGroup and MetricsLineChart.
The Two Releases
October 7, 2026
Oct 7, 2026· 15 days ago
This release introduces span query API, trace aggregation with token and cost analytics across multiple stores, self-embedding vector stores for semantic recall, and reaches @mastra/connect 1.0 with new capabilities.
Full release notesOctober 11, 2026
Oct 13, 2026· 9 days ago
This major release introduces robust crash recovery mechanisms for durable agents with run ownership and fencing, atomic working memory merges for PostgreSQL, and enhanced file-handling resilience with sandbox workflows. It also introduces Observational Memory auto-model selection and richer trace search capabilities.
Full release notes