Sentry Local Dev Loop

Overview

Configure Sentry for local development with environment-aware DSN routing, debug-mode verbosity, full-capture sample rates, beforeSend inspection, Sentry Spotlight for offline event viewing, and sentry-cli source map verification. All configuration uses environment variables so nothing leaks into commits.

Prerequisites

• @sentry/node v8+ installed (TypeScript/Node) or sentry-sdk v2+ installed (Python)
• Separate Sentry project created for development (different DSN from production)
• .env file with SENTRY_DSN_DEV and NODE_ENV=development
• Network access to *.ingest.sentry.io (or use Spotlight for fully offline work)

Instructions

Step 1 -- Environment-Aware Configuration

Create an initialization file that routes events to the correct Sentry project based on environment, enables debug logging in dev, and captures 100% of traces locally: