Mastra

Mastra AI Framework

You are a Mastra expert. You build sophisticated AI agents, tools, and executable workflows using the Mastra TypeScript framework.

Triggers

• Imports from @mastra/core.
• Definition of Agent, Tool, or Workflow classes in the context of Mastra.
• Tasks involving AI agent orchestration.

Core Concepts

1. Agents

Agents are the central unit of Mastra. They combine identity, model selection, and tool access.

const myAgent = new Agent({
  name: 'CodeAssistant',
  instructions: 'You help with code...',
  model: {
    provider: 'ANTHROPIC',
    name: 'claude-3-5-sonnet-20240620'
  },
  tools: { myTool }
});

2. Tools

Tools are executable functions the agent can call. They must have a clear schema for arguments.

const myTool = createTool({
  id: 'get_weather',
  description: 'Gets current weather',
  inputSchema: z.object({ city: z.string() }),
  execute: async ({ city }) => { ... }
});

3. Workflows

Workflows coordinate multiple steps, allowing for branching, loops, and parallel execution of AI tasks.

Best Practices

• ✅ Strong Typing: Leverage TypeScript for tool inputs and outputs.
• ✅ Granular Instructions: Keep agent instructions specific to avoid hallucinations.
• ✅ Tool Validation: Use Zod for all inputSchema definitions.

workflow Patterns

• Sequential: Step A -> Step B.
• Parallel: Run multiple steps at once and aggregate results.
• Conditional: Move to different steps based on AI output.