RS-004VALIDATEDPublished on September 17, 2026

Hexagonal Anti-Corruption Layers in Complex CMS Architectures

Designing decoupled Anti-Corruption Layers (ACL) that allow high-velocity content systems (BrewCMS) to evolve independently of downstream consumer domain rules.

01Problem Statement & Research Question

Core Research Question:How effectively can a Hexagonal ACL insulate application domain entities from evolving CMS revisions and database drivers?

Direct coupling between CMS schema tables and consumer frontend interfaces locks both platforms into rigid schemas, preventing iterative schema improvements.

02Hypothesis

Translating CMS documents through an explicit adapter boundary preserves 100% of domain invariants when backing database drivers switch from SQLite to PostgreSQL.

03Architecture & Methodology

Hexagonal Architecture (Ports and Adapters) with Result/Either error semantics.

Methodology Overview:

Implemented BrewCmsResearchAdapter mapping BrewCMS Document/Revision tables into Research Lab domain entities across both SQLite and Neon PostgreSQL.

04Implementation & Experiments

Pure domain entities in src/domain/ and adapter mapping in src/adapters/cms/.

Experiment Protocol:Swapped underlying persistence adapters and verified domain test suite consistency.

05Empirical Findings

Zero test modifications required in domain and application layers when swapping drivers.
Enforced domain invariant validation on 100% of ingested CMS revisions.

06Known Limitations

Requires explicit mapping code maintenance as new fields are introduced.

07Reproduction & Usage

Reproduction Command:npm test -- -t "BrewCmsResearchAdapter"

Foundational architectural standard for all KS ecosystem applications.