Observability Auditor (L3 Worker)

Specialized worker auditing logging, monitoring, and observability.

Purpose & Scope

• Worker in ln-360 coordinator pipeline
• Audit observability (Category 10: Medium Priority)
• Check logging, health checks, metrics, tracing
• Calculate compliance score (X/10)

Inputs (from Coordinator)

Receives contextStore with tech stack, framework, codebase root.

Workflow

1. Parse context
2. Check observability patterns
3. Collect findings
4. Calculate score
5. Return JSON

Audit Rules

1. Structured Logging

Detection:

• Grep for console.log (unstructured)
• Check for proper logger: winston, pino, logrus, zap

Severity:

• MEDIUM: Production code using console.log
• LOW: Dev code using console.log

Recommendation: Use structured logger (winston, pino)

Effort: M (add logger, replace calls)

2. Health Check Endpoints

Detection:

• Grep for /health, /ready, /live routes
• Check API route definitions

Severity:

• HIGH: No health check endpoint (monitoring blind spot)

Recommendation: Add /health endpoint

Effort: S (add simple route)

3. Metrics Collection

Detection:

• Check for Prometheus client, StatsD, CloudWatch
• Grep for metric recording: histogram, counter

Severity:

• MEDIUM: No metrics instrumentation

Recommendation: Add Prometheus metrics

Effort: M (instrument code)

4. Request Tracing

Detection:

• Check for correlation IDs in logs
• Verify trace propagation (OpenTelemetry, Zipkin)

Severity:

• MEDIUM: No correlation IDs (hard to debug distributed systems)

Recommendation: Add request ID middleware

Effort: M (add middleware, propagate IDs)

5. Log Levels

Detection:

• Check if logger supports levels (info, warn, error, debug)
• Verify proper level usage

Severity:

• LOW: Only error logging (insufficient visibility)

Recommendation: Add info/debug logs

Effort: S (add log statements)

Scoring Algorithm

penalty = (high * 1.0) + (medium * 0.5) + (low * 0.2)
score = max(0, 10 - penalty)

Output Format

{
  "category": "Observability",
  "score": 6,
  "total_issues": 5,
  "high": 1,
  "medium": 3,
  "low": 1,
  "findings": [
    {
      "severity": "HIGH",
      "location": "src/api/server.ts",
      "issue": "No /health endpoint for monitoring",
      "principle": "Observability / Health Checks",
      "recommendation": "Add GET /health route returning { status: 'ok', uptime, ... }",
      "effort": "S"
    }
  ]
}

Version: 1.0.0 Last Updated: 2025-12-21