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// 2d agoPRODUCT UPDATE
Mastra Studio adds LLM-as-a-judge scorers
Mastra Studio, the interactive developer interface for the open-source Mastra framework, now supports defining and attaching LLM-as-a-judge scorers to AI agents and workflow steps. Scorer outputs, including reasoning and scores, are saved in its observability log to facilitate interactive debugging, tracing, and prompt engineering.
// ANALYSIS
LLM-as-a-judge is often tedious to set up, but embedding it directly into a local developer GUI is a game-changer for agent prototyping and testing.
- –Interactive Tracing: Developers can view scores, reasoning, and prompt traces in Mastra Studio's interface.
- –Hybrid Approach: Mixes deterministic validators (regex/schemas) with LLM scorers for flexible evaluation.
- –Local Iteration: Streamlines debugging and testing of golden datasets before deploying to production.
// TAGS
agentllm-as-a-judgemastramastra-studioevaluationstypescript
DISCOVERED
2d ago
2026-06-19
PUBLISHED
2d ago
2026-06-19
RELEVANCE
7/ 10
AUTHOR
mastra