mastra Releases

Sep 9, 2026

This release introduces reusable sandbox templates for E2B and Platform to reduce cold-start times, unifies the workingDirectory option across sandbox providers, and adds a server-defined toModelOutput for client-side tools. It also enhances observability with a feedback review workflow and integrates @mastra/evals/vitest for running evaluations as Vitest tests.

Sep 4, 2026

Introduced a new logger adapter contract for trace-correlated logging, integrated first-class Pino support, and improved deployment readiness with worker health gating. Also fixed scheduler reliability and updated the playground UI DataList API.

Aug 28, 2026

Added new storage backends (Elasticsearch and Valkey), computer-use sandboxes with E2B Desktop, and observability upgrades including deterministic sampling. Improved sandbox lifecycle and streaming UX with SSE heartbeats.

Aug 26, 2026

Enabled caller-driven experiments for external orchestrators like Temporal and improved workflow resume safety with atomic claims. Added graceful shutdown options and a multi-turn LLM judge scorer.

Aug 24, 2026

Added durable execution for Agents API without deployment, a Cloudflare Sandbox provider, and MCP protocol upgrades. Introduced sandbox checkpoints and persistable GraphRAG snapshots.

Aug 19, 2026

Renamed CostGuardProcessor to TokenCostControl with richer budgeting options and added active run introspection APIs. Fixed observability traces for external parents and improved redaction with indexed tokens.

Aug 16, 2026

Introduced file-based agent schedules, the OracleDB storage provider, and QuickJS in-process Code Mode transport. Enabled Dynamic Workflows with persistable JSON graphs and a custom createRoute API.

Aug 12, 2026

Added tool result guardrails via processToolResult, transient agent signals, and the DeepEval observability exporter. Improved tooling visibility in traces and accelerated Platform Sandbox execution.

Aug 10, 2026

This maintenance release introduces sender display names across chat history and webhook payloads, while fixing reliability issues regarding URL generation, webhook delivery, and concurrent image sending.

Aug 9, 2026

Enabled persistable declarative workflows with JSON graphs and end-to-end stored workflow management. Added a declarative predicate DSL and upgraded Experiments & Evals with finer scorer control.

Aug 6, 2026

A patch release backports critical security fixes and stability improvements from Mermaid v11.16.1, focusing on prototype pollution protection and CSS compilation handling.

Aug 4, 2026

A patch release implementing security hardening, architectural refactoring using Maps and Sets, and specific rendering fixes for charts and configuration.

Aug 4, 2026

A patch release introducing security hardening, architectural refactoring using Maps and Sets, and specific fixes for chart rendering and configuration deprecation.

Aug 4, 2026

Added in-process Code Mode execution via the isolated-vm package, a built-in provider-native web search tool, and stored agent drafts via autoPublish. Introduced Factory channel identity domain.

Jul 31, 2026

This release migrates Lexical's built-in node classes to the `$config()` protocol, removing legacy boilerplate methods, and introduces new table features like sticky scrollbars and benchmarking tools.

Jul 30, 2026

Enabled AgentController chat channels for Slack/Discord/Telegram, improved MongoDB Vector Store with hybrid retrieval, and added exact metadata filtering across all Memory APIs.

Jul 30, 2026

This release enhances local sandbox safety with read-only modes, adds configuration controls for thread ID resolution, and improves reliability and concurrency in Factory work-items.

Jul 29, 2026

This release introduces major deployment capabilities and architectural improvements, including sandbox deployments, factory storage domains, and new packages like `@mastra/factory` and `@mastra/deployer-sandbox`.

Jul 27, 2026

A major version release that decouples the web dashboard from the binary, migrates to Fiber v3, and introduces new API endpoints for server metadata and cross-origin WebSocket authentication.

Jul 19, 2026