September 9, 2026

Mastra releases published September 9, 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 Advanced Trace Querying (Core Contract + Server Endpoints + Storage Implementations) Mastra now has a strict, portable “advanced trace query” contract (bounded time ranges, recursive predicates, thread grouping, deterministic cursor pagination) plus an authenticated server endpoint for it, with real implementations in ClickHouse, DuckDB, and Postgres. Tenant-Scoped Trace Deletion + Trace Cascade Cleanup (Experiments & API) You can delete up to 1,000 traces per request with tenant scoping, and deletion now cascades across spans and trace-linked signals (scores, feedback, metrics, logs). Experiment deletion now also cleans up the traces the experiment produced (including orphaned experiments), exposed in core APIs, server routes, and client-js methods. Workflow Graph Metadata for Control-Flow Blocks Control-flow entries (parallel/branch/loops/foreach/sleep/map, etc.) now…

• 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.