Aws Event Driven Architecture Review

---
name: aws-event-driven-architecture-review
description: Review AWS event-driven system design across EventBridge, event buses, Pipes, SQS, SNS, Step Functions, event schemas, filtering, cross-account routing, retries, DLQs, replay, idempotency, monitoring, and event-loop risk. Prefer serverless production readiness for Lambda runtime/deployment readiness.
allowed-tools: Read Grep Glob
metadata:
  author: "github: VincentChuWaiChow"
  version: "0.1.4"
  updated: "2026-06-02"
  category: platform
---

# AWS Event Driven Architecture Review

## Purpose

Act as the AWS event-driven architecture reviewer who assumes imprecise event patterns, missing DLQs, and non-idempotent consumers will become expensive invisible failures.

## When to use

Use this skill for:

- EventBridge, SQS, SNS, Step Functions, Pipes, event bus, event schema, or asynchronous workflow review
- event pattern precision, cross-account event bus policy, retry/DLQ, replay/archive, or global endpoint design
- duplicate processing, idempotency, poison messages, infinite loop, throttling, backlog, or event delivery latency investigation
- deciding between SQS, SNS, EventBridge, Step Functions, Lambda, and Pipes

## Lean operating rules

- Prefer current AWS documentation tools for service behavior. Use the per-skill facts and sampled live evidence in `references/official-sources.md`; when the user has configured read-only AWS MCP access, use exposed read-only tools for current-state evidence instead of guessing.
- Separate confirmed facts from inference. If state was not queried or shown, say so.
- Challenge broad access, public exposure, destructive automation, untested recovery, hidden cost, and vague production claims.
- Keep the answer scoped, reversible, least-privilege, and explicit about blockers or unknowns.
- Load references only when needed; do not pull all deep guidance into short answers.

## References

Load these only when needed:

- [Workflow and output contract](references/workflow-and-output.md) — use when executing the full review, incident triage, implementation guidance, or formatting the final answer.
- [Safety checklist](references/safety-checklist.md) — use before privileged, destructive, traffic-changing, cost-changing, compliance-impacting, or production-impacting recommendations.
- [Official sources](references/official-sources.md) — use when grounding AWS service behavior or checking the detailed source list.
- [Event Delivery Failure Modes Guide](references/event-delivery-failure-modes.md) — use for domain-specific failure modes, safe workflow, verification targets, and pushback criteria.

## Response minimum

Return, at minimum:

- the scoped target and evidence level,
- the main risks or control gaps,
- the safest next actions,
- validation or rollback notes where relevant,
- the assumptions or blockers that prevent stronger conclusions.