/808-regulations-eu-digital-markets-act

name: 808-regulations-eu-digital-markets-act
description: Use when reviewing, designing, or modifying Java enterprise systems that may support EU Digital Markets Act gatekeeper-platform concerns, core platform services, interoperability, business-user data access, consent-dependent data combination, ranking, self-preferencing, advertising transparency, or anti-circumvention controls. This should trigger for requests such as Review a Java platform for DMA controls; Design interoperability and business-user data access evidence; Add ranking, consent, preference, or anti-circumvention audit controls; Assess gatekeeper-platform engineering evidence before production release. Part of Plinth Toolkit
license: Apache-2.0
metadata:
  author: Juan Antonio Breña Moral
  version: 0.18.0

EU Digital Markets Act Regulation for Java Enterprise Gatekeeper Platform Controls

Use this Skill to review Java enterprise applications, platform APIs, marketplaces, app stores, advertising systems, ranking systems, identity services, browser or operating-system integrations, messaging interoperability, business-user portals, data access APIs, analytics pipelines, CI/CD workflows, or operational tooling that may support Digital Markets Act (DMA) gatekeeper-platform obligations.

Apply this Skill to determine what engineering controls, compliance evidence, and escalation paths are needed before a system is released, connected to production platform data, exposed to business users, or used to operate a core platform service.

This Skill is not legal advice. It helps Java engineers, architects, tech leads, platform teams, product teams, and reviewers identify when DMA concerns may apply and how to translate gatekeeper-platform expectations into enterprise architecture controls such as interoperability interfaces, business-user data access APIs, consent and preference evidence, ranking and self-preferencing audit signals, advertising transparency evidence, app-store or marketplace access controls, anti-circumvention guardrails, observability, change control, documentation, and compliance evidence handoff.

The purpose of this Skill is to increase awareness of potential gaps in the system and create engineering evidence for qualified review. The response produced by this Skill does not represent legal advice, a legal opinion, a gatekeeper designation, a core platform service classification, or a final regulatory determination.

The main question is:

> When does a Java enterprise platform require DMA-aware gatekeeper controls, and what should developers build differently?

External reference: [Digital Markets Act Regulation (EU) 2022/1925](https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32022R1925).

Digital Markets Act chapters summary reference: [DMA chapters summary](references/808-regulations-eu-digital-markets-act-chapters-summary.md).

Java engineering examples reference: [DMA engineering examples](references/808-regulations-eu-digital-markets-act-engineering-examples.md).

Report template asset: [DMA engineering review report template](assets/reports/808-eu-digital-markets-act-engineering-review-report-template.md).

Scope

This Skill applies to:

• Java systems that may support a gatekeeper, core platform service, online intermediation service, app store, online search engine, social network, video-sharing platform, number-independent interpersonal communications service, operating system, web browser, virtual assistant, cloud computing service, or online advertising service
• Spring Boot, Quarkus, Micronaut, and framework-agnostic Java services with platform access, interoperability, ranking, self-preferencing, business-user data access, advertising transparency, or consent-dependent data-combination concerns
• APIs, message consumers, batch jobs, exports, reports, ranking pipelines, search indexes, recommendation services, marketplace catalogs, app-store workflows, identity services, payment-service integrations, browser or operating-system defaults, and compliance reporting workflows
• Systems requiring evidence for business-user export workflows, end-user portability, third-party interoperability, advertising metrics, ranking fairness, access terms, consent and preference capture, anti-circumvention controls, and compliance-owner handoff
• Platform changes involving database migrations, Kafka message contracts, feature flags, ranking experiments, access-policy changes, consent UI changes, telemetry schemas, business-user data exports, and production release gates

Digital Markets Act Engineering Review

Treat gatekeeper designation, core platform service scope, obligation applicability, consent interpretation, self-preferencing assessments, fair and reasonable access terms, suspension or exemption requests, and regulatory interpretation as governance decisions for legal, compliance, platform governance, product, privacy, security, risk, competition, and executive accountability owners.

Engineering teams should still create evidence that makes those decisions reviewable:

• Which core platform service, business-user journey, end-user journey, data store, API, event stream, ranking system, advertising system, interoperability interface, or platform policy may be in scope
• Which business users, end users, third-party providers, advertisers, publishers, developers, or competitors are affected by the Java system
• Which data access, export, portability, interoperability, consent, preference, ranking, self-preferencing, and anti-circumvention controls exist
• Which logs, metrics, traces, audit events, data lineage records, decision records, release approvals, and compliance reports support review
• Which gaps require owner handoff before production release or continued operation

Constraints

Translate Digital Markets Act concerns into engineering controls for Java enterprise systems. Do not provide legal advice or replace review by legal, compliance, platform governance, produc