chore(deps): bump @mastra/core from 1.55.0 to 1.61.0

[dependabot]

Bumps @mastra/core from 1.55.0 to 1.61.0.

Release notes

Sourced from @​mastra/core's releases.

August 21, 2026

Highlights

Caller-Driven Experiments (Temporal/External Orchestrator Support)

New dataset experiment APIs let external orchestrators own the experiment loop while Mastra remains the system of record: create experiments idempotently, run items server-side (runExperimentItem) or submit externally computed results (submitExperimentResult), then finalize for server-computed succeeded/failed/skipped counts—fully compatible with Studio views and comparisons.

Graceful Shutdown + HTTP Drain Controls for Generated Servers

Generated servers now support configurable shutdown behavior (drain in-flight requests, tune drainTimeout, or disable built-in signal handlers) with improved shutdown draining behavior and cleanup reliability across @​mastra/core and @​mastra/deployer.

First-Class “While-Active” Message Delivery in Sessions

User messages sent while an agent is already working are now consistently marked delivery: 'while-active' automatically (including steering), simplifying clients and preserving accurate transcripts across reloads while keeping caller overrides supported.

Workflow Resume Concurrency Safety (Atomic Claim + 409 Conflicts)

Concurrent resume() calls are now safe: a resume atomically claims a suspended run (losers get WORKFLOW_RESUME_ALREADY_CLAIMED and HTTP 409), and workflow state updates add an expectedStatus guard to prevent duplicate downstream execution.

Evals: Multi-Turn LLM Judge Scorer

createMultiTurnJudgeScorer enables LLM-judge scoring over an entire multi-turn conversation (not just a single assistant message), unlocking evaluation of multi-turn runEvals inputs against plain-English criteria.

Breaking Changes

• None called out in this changelog.

Changelog

@​mastra/core@1.61.0

Minor Changes

• Added graceful shutdown options for generated servers (#20678). Configure how long in-flight HTTP requests may drain, or disable Mastra's built-in signal handlers when managing the server lifecycle yourself. (#21990)

  export const mastra = new Mastra({
    server: {
      drainTimeout: 600_000,
      handleShutdownSignals: false,
    },
  });

• The session now marks a message you send while the agent is working, and every client gets it for free. Any user message submitted with a run in flight — including the one session.steer() sends after interrupting a run — carries delivery: 'while-active', so the agent reads it as context for the work in progress and a reloaded transcript can still tell a steer apart from a normal message. A message that opens a new turn is unmarked, as before. (#21842)

  The attribute used to be resolved from the run state at dispatch time, which reads idle for a steer (a steer aborts its own run before sending), so each client had to describe both delivery routes itself.

  // before
  session.sendSignal({
    content,
    ifActive: { attributes: { delivery: 'while-active' } },
    ifIdle: { attributes: { delivery: 'message' } },
  });
  // now

... (truncated)

Commits

• ce66f91 chore: version - exit prerelease mode
• 0f94498 chore: regenerate providers and docs [skip ci]
• 0fe0a2e chore: version packages (alpha) (#22003)
• cc65495 chore: version packages (alpha) (#22001)
• 7c60df5 fix(core): stop persisting mastra__authToken in cleartext in durable state (#...
• 27e2b56 chore: version packages (alpha) (#21840)
• b6a771e feat(deployer): add configurable graceful shutdown (#21990)
• 9267e9b feat(datasets): caller-driven experiments — run the loop from your own orches...
• acc3471 fix(datasets): use snapshot semantics for item versions (#21979)
• 57c5103 fix(factory): use factory defaults for board run memory settings (#21899)
• Additional commits viewable in compare view

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