Chain — Chain Pattern & Pipeline Reference

Quick-reference skill for chain-based design patterns, middleware pipelines, and sequential processing architectures.

When to Use

• Implementing Chain of Responsibility design pattern
• Building middleware pipelines (Express, Koa, Django)
• Designing multi-step data processing workflows
• Understanding promise chains and async pipelines
• Building event processing or filter chains

Commands

intro

scripts/script.sh intro

Overview of chain patterns — concept, variants, and applications.

responsibility

scripts/script.sh responsibility

Chain of Responsibility design pattern — GoF pattern with examples.

middleware

scripts/script.sh middleware

Middleware chains — Express, Koa, Django, and custom implementations.

promise

scripts/script.sh promise

Promise chains and async pipelines — chaining, error handling, patterns.

pipeline

scripts/script.sh pipeline

Unix pipeline philosophy and data transformation chains.

filter

scripts/script.sh filter

Filter chains — servlet filters, interceptors, decorators.

blockchain

scripts/script.sh blockchain

Blockchain fundamentals — hash chains, blocks, consensus basics.

examples

scripts/script.sh examples

Implementation examples across languages and frameworks.

help

scripts/script.sh help

version

scripts/script.sh version

Configuration

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