---
name: "aws-sqs-sns-fanout-pattern"
description: "Broadcast asynchronous events to multiple decoupled processing queues using SNS and SQS."
metadata:
  author: "AWS"
  version: "1.0.0"
  runtime_compatibility:
    - "codex"
    - "claude-code"
    - "cursor"
    - "windsurf"
triggers:
  - "implement sns sqs fanout"
  - "configure sqs dead letter queue"
  - "sns message filter policy"
permissions:
  fs_read: true
  fs_write: "workspace"
  shell_exec: false
  net_access: false
---

# AWS SNS to SQS Fan-Out Messaging & Dead-Letter Queues

Implements the SNS-SQS Fan-Out pattern: subscribing multiple SQS queues to an SNS topic, message filtering policies (attribute-based), dead-letter queue (DLQ) redrive, and KMS envelope encryption.

## When to Invoke
Invoke this skill whenever you need to:
- implement sns sqs fanout
- configure sqs dead letter queue
- sns message filter policy

## Execution SOP & Rules
1. Create SNS topic and multiple SQS queues; grant SNS permission to publish to SQS via queue policy.
2. Create SNS subscriptions specifying Queue ARN as endpoint with RawMessageDelivery: true.
3. Add filterPolicy: { 'order_type': ['international'] } to subscription attributes.
4. Attach redrivePolicy on target SQS pointing to dead-letter queue ARN.

## Verification Checklist
- Run local linting, syntax validation, and type-checks before reporting completion.
- Ensure all created or modified files adhere to workspace boundaries and avoid uncommitted secrets.
- Verify tests or build commands exit cleanly with return code 0.