Middleware chain designer

Skill a5c-ai/babysitter/library/specializations/sdk-platform-development/skills/middleware-chain-designer

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Design middleware and interceptor chains for SDK extensibility

SKILL.md

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Middleware Chain Designer Skill

Overview

This skill designs middleware and interceptor chain architectures that enable SDK extensibility through pluggable request/response processing.

Capabilities

Design middleware interfaces and contracts
Implement interceptor chains with ordering
Support before/after hooks for requests
Enable custom transport implementations
Implement retry and circuit breaker middleware
Design logging and tracing interceptors
Support middleware composition
Configure middleware priority ordering

Target Processes

Plugin and Extension Architecture
Custom Transport and Middleware
SDK Architecture Design

Integration Points

SDK core HTTP clients
Authentication handlers
Logging frameworks
Retry libraries
Custom transports

Input Requirements

Extensibility requirements
Middleware ordering needs
Hook types required
Composition patterns
Transport abstraction needs

Output Artifacts

Middleware interface definitions
Interceptor chain implementation
Built-in middleware (logging, retry)
Transport abstraction layer
Middleware composition utilities
Documentation and examples

Usage Example

skill:
  name: middleware-chain-designer
  context:
    middlewareTypes:
      - request
      - response
      - error
    hooks:
      beforeRequest: true
      afterResponse: true
      onError: true
    builtInMiddleware:
      - logging
      - retry
      - timeout
      - compression
    ordering:
      priority: true
      named: true
    transports:
      - http
      - websocket
      - custom

Best Practices

Define clear middleware interfaces
Support ordered execution
Enable middleware composition
Provide built-in common middleware
Allow transport customization
Document middleware authoring