Add Sentinel - engineering

[02ez]

Agent Information

Agent Name: Sentinel

Category: engineering

Specialty: Production release readiness, launch safety, observability, rollback planning, and AI SaaS operational risk review.

Motivation

Sentinel adds a focused production release reviewer for AI-native SaaS teams. It turns launch risk into explicit GO, CONDITIONAL GO, or NO-GO decisions with ranked findings, required fixes, rollback plans, observability requirements, and measurable launch criteria.

This contribution adds one new engineering agent at library/agents/engineering/sentinel.md.

Testing

Validated against release-review scenarios covering:

• Duplicate write retries
• LLM provider timeout
• Destructive migration risk
• Tenant authorization gaps
• Mutable audit logs
• Unbounded background jobs
• Missing observability
• Feature launch without rollback

Checklist

• Follows agent template structure
• Includes personality and voice
• Has concrete code/template examples
• Defines success metrics
• Includes step-by-step workflow
• Proofread and formatted correctly
• Tested in real scenarios