Paths: File paths (

shared/

,

references/

,

../ln-*

) are relative to skills repo root. If not found at CWD, locate this SKILL.md directory and go up one level for repo root. If

shared/

is missing, fetch files via WebFetch from

https://raw.githubusercontent.com/levnikolaevich/claude-code-skills/master/skills/{path}

.

Observability Auditor (L3 Worker)

Type: L3 Worker

Specialized worker auditing logging, monitoring, and observability.

Purpose & Scope

• Audit observability (Category 10: Medium Priority)
• Check logging, health checks, metrics, tracing
• Calculate compliance score (X/10)

Inputs

MANDATORY READ: Load

shared/references/audit_worker_core_contract.md

.

Receives

contextStore

with tech stack, framework, codebase root, output_dir.

Workflow

MANDATORY READ: Load

shared/references/two_layer_detection.md

for detection methodology.

1. Parse context + output_dir
2. Determine project type (Layer 2 pre-check): Is this a web service (all checks apply), CLI tool (health/probes not applicable), or library (most checks optional)? Adjust applicable checks accordingly.
3. Check observability patterns (Layer 1: grep)
4. Analyze context per candidate (Layer 2):
   • Structured logging: is this a library (no logging OK) or a service (logging required)?
   • Health endpoints: web service -> required. CLI/library -> skip
   • Request tracing: monolith -> less needed. Microservice -> critical
5. Collect confirmed findings
6. Calculate score
7. Write Report: Build full markdown report in memory per

   shared/templates/audit_worker_report_template.md

   , write to

   {output_dir}/ln-627--global.md

   in single Write call
8. Return Summary: Return minimal summary to coordinator

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

MANDATORY READ: Load

shared/references/audit_worker_core_contract.md

and

shared/references/audit_scoring.md

.

Output Format

MANDATORY READ: Load

shared/references/audit_worker_core_contract.md

and

shared/templates/audit_worker_report_template.md

.

Write JSON summary per

shared/references/audit_summary_contract.md

. In managed mode the caller passes both

runId

and

summaryArtifactPath

; in standalone mode the worker generates its own run-scoped artifact path per shared contract.

Write report to

{output_dir}/ln-627--global.md

with

category: "Observability"

and checks: structured_logging, health_endpoints, metrics_collection, request_tracing, log_levels.

Return summary per

shared/references/audit_summary_contract.md

.

When

summaryArtifactPath

is absent, write the standalone runtime summary under

.hex-skills/runtime-artifacts/runs/{run_id}/evaluation-worker/{worker}--{identifier}.json

and optionally echo the same summary in structured output.

Report written: .hex-skills/runtime-artifacts/runs/{run_id}/audit-report/ln-627--global.md
Score: X.X/10 | Issues: N (C:N H:N M:N L:N)

Reference Files

• Audit output schema:

  shared/references/audit_output_schema.md

Critical Rules

MANDATORY READ: Load

shared/references/audit_worker_core_contract.md

.

• Do not auto-fix: Report only, never inject logging or endpoints
• Framework-aware detection: Adapt patterns to project's tech stack (winston/pino for Node, logrus/zap for Go, etc.)
• Effort realism: S = <1h, M = 1-4h, L = >4h
• Exclusions: Skip test files for console.log detection, skip dev-only scripts
• Context-sensitive severity: console.log in production code = MEDIUM, in dev utilities = LOW

Definition of Done

MANDATORY READ: Load

shared/references/audit_worker_core_contract.md

.

• contextStore parsed (tech stack, framework, output_dir)
• All 5 checks completed (structured logging, health endpoints, metrics, request tracing, log levels)
• Findings collected with severity, location, effort, recommendation
• Score calculated per

  shared/references/audit_scoring.md

• Report written to

  {output_dir}/ln-627--global.md

  (atomic single Write call)
• Summary written per contract

---

Version: 3.0.0 Last Updated: 2025-12-23