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Lifecycle Auditor (L3 Worker)

Specialized worker auditing application lifecycle and entry points.

Purpose & Scope

• Worker in ln-620 coordinator pipeline
• Audit lifecycle (Category 12: Medium Priority)
• Check bootstrap, shutdown, signal handling, probes
• Calculate compliance score (X/10)

Inputs (from Coordinator)

MANDATORY READ: Load shared/references/audit_worker_core_contract.md.

Receives contextStore with tech stack, deployment type, codebase root, output_dir.

Workflow

MANDATORY READ: Load shared/references/two_layer_detection.md for detection methodology.

1. Parse context + output_dir
2. Check lifecycle patterns (Layer 1: grep for SIGTERM, shutdown handlers, probes)
3. Analyze context per candidate (Layer 2):
   • Bootstrap order: read main file — trace actual init sequence, verify dependencies satisfied before use
   • Graceful shutdown: read signal handlers — do they actually close all resources? Or just log and exit?
   • Resource cleanup: read shutdown handler — are ALL opened resources (DB, Redis, queues) closed?
   • Probes: check deployment config (Dockerfile, k8s manifests) — is this containerized?
4. Collect confirmed findings
5. Calculate score
6. Write Report: Build full markdown report in memory per shared/templates/audit_worker_report_template.md, write to {output_dir}/629-lifecycle.md in single Write call
7. Return Summary: Return minimal summary to coordinator

Audit Rules

1. Bootstrap Initialization Order

Detection:

• Check main/index file for initialization sequence
• Verify dependencies loaded before usage (DB before routes)

Severity:

• HIGH: Incorrect order causes startup failures

Recommendation: Initialize in correct order: config → DB → routes → server

Effort: M (refactor startup)

2. Graceful Shutdown

Detection:

• Grep for SIGTERM, SIGINT handlers
• Check process.on('SIGTERM') (Node.js)
• Check signal.Notify (Go)

Severity:

• HIGH: No shutdown handler (abrupt termination)

Recommendation: Add SIGTERM handler, close connections gracefully

Effort: M (add shutdown logic)

3. Resource Cleanup on Exit

Detection:

• Check if DB connections closed on shutdown
• Verify file handles released
• Check worker threads stopped

Severity:

• MEDIUM: Resource leaks on shutdown

Recommendation: Close all resources in shutdown handler

Effort: S-M (add cleanup calls)

4. Signal Handling

Detection:

• Check handlers for SIGTERM, SIGINT, SIGHUP
• Verify proper signal propagation to child processes

Severity:

• MEDIUM: Missing signal handlers

Recommendation: Handle all standard signals

Effort: S (add signal handlers)

5. Liveness/Readiness Probes

Detection (for containerized apps):

• Check for /live, /ready endpoints
• Verify Kubernetes probe configuration

Severity:

• MEDIUM: No probes (Kubernetes can't detect health)

Recommendation: Add /live (is running) and /ready (ready for traffic)

Effort: S (add endpoints)

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 report to {output_dir}/629-lifecycle.md with category: "Lifecycle" and checks: bootstrap_order, graceful_shutdown, resource_cleanup, signal_handling, probes.

Return summary to coordinator:

Report written: docs/project/.audit/ln-620/{YYYY-MM-DD}/629-lifecycle.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, lifecycle changes risk downtime
• Deployment-aware: Adapt probe checks to deployment type (Kubernetes = probes required, bare metal = optional)
• Effort realism: S = <1h, M = 1-4h, L = >4h
• Exclusions: Skip CLI tools and scripts (no long-running lifecycle), skip serverless functions (platform-managed lifecycle)
• Initialization order matters: Flag DB usage before DB init as HIGH regardless of context

Definition of Done

MANDATORY READ: Load shared/references/audit_worker_core_contract.md.

• contextStore parsed (deployment type, output_dir)
• All 5 checks completed (bootstrap order, graceful shutdown, resource cleanup, signal handling, probes)
• Findings collected with severity, location, effort, recommendation
• Score calculated per shared/references/audit_scoring.md
• Report written to {output_dir}/629-lifecycle.md (atomic single Write call)
• Summary returned to coordinator

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Version: 3.0.0 Last Updated: 2025-12-23