ConsoleExporter

Outputs trace events to the console for debugging and development.

Constructor

new ConsoleExporter(logger?: IMastraLogger)

Properties

readonly name = 'tracing-console-exporter';

Methods

exportEvent

async exportEvent(event: AITracingEvent): Promise<void>

Exports a tracing event to the console.

shutdown

async shutdown(): Promise<void>

Logs shutdown message.

Output Format

The exporter outputs different formats based on event type:

SPAN_STARTED

🚀 SPAN_STARTED
   Type: [span type]
   Name: [span name]
   ID: [span id]
   Trace ID: [trace id]
   Input: [formatted input]
   Attributes: [formatted attributes]
────────────────────────────────────────

SPAN_ENDED

✅ SPAN_ENDED
   Type: [span type]
   Name: [span name]
   ID: [span id]
   Duration: [duration]ms
   Trace ID: [trace id]
   Input: [formatted input]
   Output: [formatted output]
   Error: [formatted error if present]
   Attributes: [formatted attributes]
────────────────────────────────────────

SPAN_UPDATED

📝 SPAN_UPDATED
   Type: [span type]
   Name: [span name]
   ID: [span id]
   Trace ID: [trace id]
   Input: [formatted input]
   Output: [formatted output]
   Error: [formatted error if present]
   Updated Attributes: [formatted attributes]
────────────────────────────────────────

Usage

import { ConsoleExporter } from "@mastra/core/ai-tracing";
import { ConsoleLogger, LogLevel } from "@mastra/core/logger";

// Use default logger (INFO level)
const exporter = new ConsoleExporter();

// Use custom logger
const customLogger = new ConsoleLogger({ level: LogLevel.DEBUG });
const exporterWithLogger = new ConsoleExporter(customLogger);

Implementation Details

• Formats attributes as JSON with 2-space indentation
• Calculates and displays span duration in milliseconds
• Handles serialization errors gracefully
• Logs unimplemented event types as warnings
• Uses 80-character separator lines between events

See Also

Documentation

• AI Tracing Overview - Complete guide
• Exporters - Exporter concepts

Other Exporters

• DefaultExporter - Storage persistence
• CloudExporter - Mastra Cloud
• Langfuse - Langfuse integration
• Braintrust - Braintrust integration

Reference

• Configuration - Configuration options
• Interfaces - Type definitions