mastra-effectEffect-native Mastra tools

Wrap Mastra's agent loop with Effect Layers, typed tool handlers, and Assistant UI integration.

Inferred handler R

Server tool handlers declare dependencies with yield*. Layer requirements flow into toolkit.toLayer and Agent.stream naturally.

requiredClient tools are type-gated at UiToolkit.make and rendered via toComponents() — no fake server handler layers.

Define tool input and output with Effect Schema. Inference-first examples, minimal annotations.

Package	Description
`mastra-effect`	Core — MastraTool, Toolkit, agent/memory/stream wrappers. No React.
`mastra-effect-assistant-ui`	React helpers for Assistant UI toolkits and client tool UI.