Agent Skills
› cosmicstack-labs/mercury-agent-skills
› serverless-patterns
serverless-patterns
GitHub提供Serverless应用开发指南，涵盖Lambda函数设计、冷启动优化策略、事件驱动架构（如SQS+Lambda）、API Gateway最佳实践及SAM/CDK等主流框架选型建议。
Trigger Scenarios
需要构建可扩展的Serverless应用
优化Lambda冷启动性能
设计事件驱动架构
选择Serverless部署框架
Install
npx skills add cosmicstack-labs/mercury-agent-skills --skill serverless-patterns -g -y
SKILL.md
Frontmatter
{
"name": "serverless-patterns",
"metadata": {
"tags": [
"serverless",
"lambda",
"cloud",
"aws",
"event-driven"
],
"author": "cosmicstack-labs",
"version": "1.0.0",
"category": "backend"
},
"description": "Lambda, cold starts, event-driven design, API Gateway, and serverless frameworks"
}
Serverless Patterns
Build scalable serverless applications.
Core Patterns
Function Design
- Single responsibility per function
- Stateless (use external storage for state)
- Idempotent handlers (retry-safe)
- Receive event, process, return/forward
Cold Start Mitigation
| Strategy | Effect | Tradeoff |
|---|---|---|
| Provisioned Concurrency | Zero cold starts | Cost |
| Smaller runtime (Node/Python) | Faster start | Language choice |
| Keep-alive ping | Reduce frequency | Extra cost |
| Lambda SnapStart (Java) | Fast restore | State constraints |
| Lambda@Edge | Regional distribution | 1MB response limit |
Event-Driven Design
Event Types
Events:
- UserRegistered { userId, email, timestamp }
- OrderPlaced { orderId, items, total }
- PaymentProcessed { orderId, amount, status }
- EmailSent { to, template, variables }
SQS + Lambda Pattern
API Gateway → Lambda (producer) → SQS → Lambda (consumer) → DynamoDB
Benefits: decoupling, buffering, retry, dead-letter queue.
API Gateway Patterns
- Request validation at gateway level
- Caching for GET endpoints (TTL per route)
- WAF for rate limiting and IP blocks
- Custom domain with ACM certificate
- Usage plans for API keys
Frameworks
- SAM (AWS) — YAML/YML, local testing
- Serverless Framework — Multi-cloud, plugins
- CDK (AWS) — Full programming languages
- Terraform — If already using for other infra
- Chalice (Python) — Flask-like, AWS only
Best Practices
- Function timeout: max 30s for APIs, 15min for background
- Memory: allocate more = more CPU (for compute-heavy, use 1.7GB+)
- Monitor: Duration, Invocations, Error count, Throttles
- Logs: structured JSON to CloudWatch
- Security: least-privilege IAM roles per function
Version History
- 38e2523 Current 2026-07-05 19:37
