Mastra @mastra/core@1.64.0 highlights: (1) a new reusable sandbox template (`@mastra/platform-workspace` plus `@mastra/e2b`) lets sandboxes start from a pre-cloned, pre-built repo image, cutting cold-start time for code sessions and workspace-backed agents; (2) `MastraSandboxOptions.workingDirectory` unifies default working-directory behavior across every sandbox provider (Docker, E2B, Vercel, Railway, etc.); (3) breaking: `@mastra/factory`'s `sandbox` config changes from an options object to a callback, and `@mastra/playground-ui` removes `Chip`/`ChipsGroup`/`StatusBadge` in favor of `Badge`.
Mastra @mastra/core@1.63.0 in three points: (1) a new `AdaptableLogger` contract writes trace_id/span_id straight into native log records, replacing the old dual-write wrapper — `PinoLogger` in `@mastra/loggers` is the first to support it; (2) `@mastra/deployer` adds a standalone worker entry with a `/health` endpoint (503 while starting, 200 once ready) so deployment platforms can judge whether a rollout is safe; (3) breaking change: `@mastra/playground-ui`'s DataList drops `variant="lined"`/`flushLeft`/`flushRight`/`MonoCell` in favor of `DataList.TextCell font="mono"`.
Mastra @mastra/core@1.62.0 has three highlights: (1) new Computer-Use Sandboxes let agents drive a virtual desktop through the Daytona or E2B Desktop providers — 11 tools for screenshots, clicks, typing, and scrolling; (2) new `@mastra/elasticsearch` and `@mastra/valkey`/`@mastra/valkey-streams` storage backends widen production storage options; (3) 7 breaking changes, including dropped Cloudflare KV/ClickHouse support for background task storage, a changed `DaytonaSandbox` command result format, and the removed `persistPartialOnAbort` option on `agent.stream()`.
Mastra is a TypeScript agent framework that combines agents, typed workflows, memory, MCP, tracing, and scorers in one Node.js development environment.
Mastra 1.60.0 highlights: (1) Stored Agents gain durable: true for durable execution without redeployment, inheriting the server's cache/pubsub for multi-replica persistence; (2) new @mastra/cloudflare-sandbox provider executes commands and file operations through a deployed Sandbox Bridge Worker; (3) @mastra/mcp supports the stateless 2026-07-28 MCP protocol revision and multi-turn elicitation. No breaking changes.
Mastra 1.59.0 highlights: (1) CostGuardProcessor renamed and upgraded to TokenCostControl, now supporting user/organization/session tiered budgets with warnAtPercent alerts; (2) Breaking: Factory's autoRunEnabled now defaults to false — rule-suggested executions enter a proposed state pending approval; (3) New listActiveThreadRuns() for low-cost querying of in-progress runs, enabling status-polling UIs.
Sorted by GitHub Stars, a survey of 15 mainstream AI Agent frameworks in 2026 — their positioning, key features, and ideal use cases. Not a ranking — it's a map.