Extension Points

Kind: mechanism

Layer: Extensibility Core

Record: architecture:extension-points

Severity: recommended

Scope: framework, plugin, module

Canonical: Ontology

A mechanism that exposes named hooks or interfaces where new behavior can be added without editing the core.

Listed in Architecture principles, after Plugin Architecture and before Inversion of Control (IoC).

Requires

• Stable Interfaces
• Contracts

Reinforces

• Open/Closed Principle (OCP)
• Plugin Architecture

Enables

• Third-Party Extension

Conflicts with

• Closed Core

In tension with

• API Surface Growth

Tensions

• Extension Points / API Surface Growth

Violated by

• Closed Core

Refactored by

• Extract Interface

Severity

• recommended

Category

• Plugin / Extensibility / IoC

Enforced by

• runtime/entrypoints/coverage.entrypoint.ts

Required by

• Runtime Extensibility

Refactors

• Runtime Extensibility
• Forward Compatibility

Linked from

• The filesystem is the architecture
• The direction axis
• The structural domain
• Architectural rules and principles
• Runtime Discovery / Dynamic Binding
• Contracts / Interfaces / Compatibility
• SOLID / Object-Oriented Design
• Plugin / Extensibility / IoC
• Core Vocabulary
• Plugin / Extensibility / IoC
• SOLID / Object-Oriented Design
• Severity levels
• The resolutions

in this codebase

• registerPage
• presentation/records
• presentation/records/records.barrel.ts