error-tracking

name	error-tracking
description	Add Sentry v8 error tracking and performance monitoring to your services. Use this skill when adding error handling, creating new controllers, instrumenting cron jobs, or tracking database performance. ALL ERRORS MUST BE CAPTURED TO SENTRY - no exceptions.

Sentry Integration Skill

Purpose

This skill enforces comprehensive Sentry error tracking and performance monitoring across all services following Sentry v8 patterns.

When to Use This Skill

• Adding error handling to any code
• Creating new controllers or routes
• Instrumenting cron jobs
• Tracking database performance
• Adding performance spans
• Handling workflow errors

🚨 CRITICAL RULE

ALL ERRORS MUST BE CAPTURED TO SENTRY - No exceptions. Never use console.error alone.

Current Status

Example: API Service ✅ Complete

• Sentry v8 fully integrated
• All workflow errors tracked
• Background job processors instrumented
• Test endpoints available

Sentry Integration Patterns

1. Controller Error Handling

// ✅ CORRECT - Use BaseController
import { BaseController } from '../controllers/BaseController';

export class MyController extends BaseController {
    async myMethod() {
        try {
            // ... your code
        } catch (error) {
            this.handleError(error, 'myMethod'); // Automatically sends to Sentry
        }
    }
}

2. Route Error Handling (Without BaseController)

import * as Sentry from '@sentry/node';

router.get('/route', async (req, res) => {
    try {
        // ... your code
    } catch (error) {
        Sentry.captureException(error, {
            tags: { route: '/route', method: 'GET' },
            extra: { userId: req.user?.id }
        });
        res.status(500).json({ error: 'Internal server error' });
    }
});

3. Workflow Error Handling

Example of a domain-specific Sentry helper from the original production project. If you build a helper like this for your domain, the call site looks like:

import { WorkflowSentryHelper } from '../workflow/utils/sentryHelper';

WorkflowSentryHelper.captureWorkflowError(error, {
    workflowCode: 'INVOICE_APPROVAL',
    instanceId: 123,
    stepId: 456,
    userId: 'user-123',
    operation: 'stepCompletion',
    metadata: { additionalInfo: 'value' }
});

Without a helper, plain Sentry works everywhere:

Sentry.captureException(error, {
    tags: { operation: 'stepCompletion' },
    extra: { workflowCode: 'INVOICE_APPROVAL', instanceId: 123, userId: 'user-123' }
});

4. Cron Jobs (MANDATORY Pattern)

#!/usr/bin/env node
// FIRST LINE after shebang - CRITICAL!
import '../instrument';
import * as Sentry from '@sentry/node';

async function main() {
    return await Sentry.startSpan({
        name: 'cron.job-name',
        op: 'cron',
        attributes: {
            'cron.job': 'job-name',
            'cron.startTime': new Date().toISOString(),
        }
    }, async () => {
        try {
            // Your cron job logic
        } catch (error) {
            Sentry.captureException(error, {
                tags: {
                    'cron.job': 'job-name',
                    'error.type': 'execution_error'
                }
            });
            console.error('[Job] Error:', error);
            process.exit(1);
        }
    });
}

main()
    .then(() => {
        console.();
        process.();
    })
    .( {
        .(, error);
        process.();
    });

5. Database Performance Monitoring

Example from the original production project - a small helper that wraps DB calls in Sentry spans. Adapt to your codebase:

import { DatabasePerformanceMonitor } from '../utils/databasePerformance';

const result = await DatabasePerformanceMonitor.withPerformanceTracking(
    'findMany',
    'UserProfile',
    async () => {
        return await PrismaService.main.userProfile.findMany({
            take: 5,
        });
    }
);

The universally-available equivalent is a direct Sentry span:

const result = await Sentry.startSpan({
    name: 'db.userProfile.findMany',
    op: 'db.query',
    attributes: { 'db.model': 'UserProfile', 'db.operation': 'findMany' }
}, async () => {
    return await prisma.userProfile.findMany({ take: 5 });
});

6. Async Operations with Spans

import * as Sentry from '@sentry/node';

const result = await Sentry.startSpan({
    name: 'operation.name',
    op: 'operation.type',
    attributes: {
        'custom.attribute': 'value'
    }
}, async () => {
    // Your async operation
    return await someAsyncOperation();
});

Error Levels

Use appropriate severity levels:

• fatal: System is unusable (database down, critical service failure)
• error: Operation failed, needs immediate attention
• warning: Recoverable issues, degraded performance
• info: Informational messages, successful operations
• debug: Detailed debugging information (dev only)

Required Context

import * as Sentry from '@sentry/node';

Sentry.withScope((scope) => {
    // ALWAYS include these if available
    scope.setUser({ id: userId });
    scope.setTag('service', 'api'); // your service name
    scope.setTag('environment', process.env.NODE_ENV);

    // Add operation-specific context
    scope.setContext('operation', {
        type: 'workflow.start',
        workflowCode: 'INVOICE_APPROVAL',
        entityId: 123
    });

    Sentry.captureException(error);
});

Service Integration Examples

API Service (Example)

Location: ./api/src/instrument.ts

import * as Sentry from '@sentry/node';
import { nodeProfilingIntegration } from '@sentry/profiling-node';

Sentry.init({
    dsn: process.env.SENTRY_DSN,
    environment: process.env.NODE_ENV || 'development',
    integrations: [
        nodeProfilingIntegration(),
    ],
    tracesSampleRate: 0.1,
    profilesSampleRate: 0.1,
});

Key Helpers:

• Custom Sentry helpers for domain-specific errors
• DatabasePerformanceMonitor - DB query tracking
• BaseController - Controller error handling

Notifications Service (Example)

Location: ./notifications/src/instrument.ts

import * as Sentry from '@sentry/node';
import { nodeProfilingIntegration } from '@sentry/profiling-node';

Sentry.init({
    dsn: process.env.SENTRY_DSN,
    environment: process.env.NODE_ENV || 'development',
    integrations: [
        nodeProfilingIntegration(),
    ],
    tracesSampleRate: 0.1,
    profilesSampleRate: 0.1,
});

Key Helpers:

• Service-specific Sentry helpers for domain errors
• BaseController - Controller error handling

Configuration (config.ini)

[sentry]
dsn = your-sentry-dsn
environment = development
tracesSampleRate = 0.1
profilesSampleRate = 0.1

[databaseMonitoring]
enableDbTracing = true
slowQueryThreshold = 100
logDbQueries = false
dbErrorCapture = true
enableN1Detection = true

Testing Sentry Integration

Example Test Endpoints

# Test basic error capture
curl http://localhost:3000/api/sentry/test-error

# Test performance tracking
curl http://localhost:3000/api/sentry/test-performance

# Test database performance
curl http://localhost:3000/api/sentry/test-database-performance

Create test endpoints in your services to verify Sentry integration works end-to-end.

Performance Monitoring

Requirements

1. All API endpoints must have transaction tracking
2. Database queries > 100ms are automatically flagged
3. N+1 queries are detected and reported
4. Cron jobs must track execution time

Transaction Tracking

import * as Sentry from '@sentry/node';

// Automatic transaction tracking for Express routes
app.use(Sentry.Handlers.requestHandler());
app.use(Sentry.Handlers.tracingHandler());

// Manual transaction for custom operations
const transaction = Sentry.startTransaction({
    op: 'operation.type',
    name: 'Operation Name',
});

try {
    // Your operation
} finally {
    transaction.finish();
}

Common Mistakes to Avoid

❌ NEVER use console.error without Sentry ❌ NEVER swallow errors silently ❌ NEVER expose sensitive data in error context ❌ NEVER use generic error messages without context ❌ NEVER skip error handling in async operations ❌ NEVER forget to import instrument.ts as first line in cron jobs

Implementation Checklist

When adding Sentry to new code:

• Imported Sentry or appropriate helper
• All try/catch blocks capture to Sentry
• Added meaningful context to errors
• Used appropriate error level
• No sensitive data in error messages
• Added performance tracking for slow operations
• Tested error handling paths
• For cron jobs: instrument.ts imported first

Key Files (Typical Structure)

Per Service

• src/instrument.ts - Sentry initialization (imported first)
• src/utils/sentryHelper.ts - Domain-specific error helpers
• src/utils/databasePerformance.ts - DB monitoring
• src/controllers/BaseController.ts - Controller base with Sentry

Configuration

• config.ini or .env - Sentry DSN and settings
• sentry.ini - Shared Sentry config (optional)