Agent skill

Layered Architecture

by rrezartprebreza in rrezartprebreza/spring-boot-skills

A skill your agent uses when generating or modifying any Spring Boot class — controllers, services, repositories, DTOs, mappers, or configuration.

MITAuto-check passedBackend & APIs

Install Layered Architecture

skills CLI

$ npx skills add rrezartprebreza/spring-boot-skills --skill layered-architecture -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install rrezartprebreza/spring-boot-skills layered-architecture --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/rrezartprebreza/spring-boot-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/spring-boot-3/layered-architecture .claude/skills/layered-architecture && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "layered-architecture" agent skill from https://github.com/rrezartprebreza/spring-boot-skills/tree/main/skills/spring-boot-3/layered-architecture into .claude/skills/layered-architecture/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "layered-architecture", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/rrezartprebreza/spring-boot-skills/tree/main/skills/spring-boot-3/layered-architecture

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add rrezartprebreza/spring-boot-skills --skill layered-architecture -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install rrezartprebreza/spring-boot-skills layered-architecture --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/rrezartprebreza/spring-boot-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/spring-boot-3/layered-architecture .agents/skills/layered-architecture && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "layered-architecture" agent skill from https://github.com/rrezartprebreza/spring-boot-skills/tree/main/skills/spring-boot-3/layered-architecture into .agents/skills/layered-architecture/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "layered-architecture", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add rrezartprebreza/spring-boot-skills --skill layered-architecture -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install rrezartprebreza/spring-boot-skills layered-architecture --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/rrezartprebreza/spring-boot-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/spring-boot-3/layered-architecture .cursor/skills/layered-architecture && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "layered-architecture" agent skill from https://github.com/rrezartprebreza/spring-boot-skills/tree/main/skills/spring-boot-3/layered-architecture into .cursor/skills/layered-architecture/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "layered-architecture", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/rrezartprebreza/spring-boot-skills.git --path skills/spring-boot-3/layered-architecture

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add rrezartprebreza/spring-boot-skills --skill layered-architecture -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install rrezartprebreza/spring-boot-skills layered-architecture --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/rrezartprebreza/spring-boot-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/spring-boot-3/layered-architecture .gemini/skills/layered-architecture && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "layered-architecture" agent skill from https://github.com/rrezartprebreza/spring-boot-skills/tree/main/skills/spring-boot-3/layered-architecture into .gemini/skills/layered-architecture/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "layered-architecture", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install rrezartprebreza/spring-boot-skills layered-architecture

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add rrezartprebreza/spring-boot-skills --skill layered-architecture -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/rrezartprebreza/spring-boot-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/spring-boot-3/layered-architecture .github/skills/layered-architecture && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "layered-architecture" agent skill from https://github.com/rrezartprebreza/spring-boot-skills/tree/main/skills/spring-boot-3/layered-architecture into .github/skills/layered-architecture/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "layered-architecture", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add rrezartprebreza/spring-boot-skills --skill layered-architecture -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install rrezartprebreza/spring-boot-skills layered-architecture --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/rrezartprebreza/spring-boot-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/spring-boot-3/layered-architecture .opencode/skills/layered-architecture && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "layered-architecture" agent skill from https://github.com/rrezartprebreza/spring-boot-skills/tree/main/skills/spring-boot-3/layered-architecture into .opencode/skills/layered-architecture/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "layered-architecture", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: layered-architecture
GitHub stars: 301
Token cost: ~1.5k tokens
SKILL.md length: 365 words
Files: 7
Skills in repo: 51
Repo updated: Sep 21, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

A skill your agent uses when generating or modifying any Spring Boot class — controllers, services, repositories, DTOs, mappers, or configuration.

Modifying any Spring Boot class — controllers
SKILL.md covers Layer Rules, Controller Layer, Service Layer and Repository Layer, plus 5 more sections
Runs Java scripts from its folder
Tasks that involve Backend development

What it does

Layered Architecture is an agent skill from rrezartprebreza/spring-boot-skills. Use when generating or modifying any Spring Boot class — controllers, services, repositories, DTOs, mappers, or configuration. Enforces strict layer separation and prevents business logic from leaking across boundaries.

Its SKILL.md is about 1.5k tokens, which your agent loads only when the skill is triggered. The skill folder holds 9 other files (for example `agents/openai.yaml`).

It sits in Backend & APIs, covering Backend development. It works with Spring Boot. The repository describes itself as: Production-grade Claude Code and Codex skills for Spring Boot developers. The licence is MIT.

When your agent uses it

Modifying any Spring Boot class — controllers
Tasks that involve Backend development

Example prompts

“/layered-architecture”

What it can do on your machine

Read from SKILL.md and the folder at commit f0c06a0. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships script files (Java), which the agent can run.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Layered Architecture loads about 1.5k tokens when it runs. Until then it costs about 60 tokens; SKILL.md has 365 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~60
When it runs · the whole SKILL.md, loaded when a task matches: ~1.5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from rrezartprebreza/spring-boot-skills at commit f0c06a0, republished under its MIT licence (© rrezartprebreza). 365 words, ~1,549 tokens.

Download SKILL.mdSave it as .claude/skills/layered-architecture/SKILL.md (or your agent's skills folder). This skill also uses 6 other files; get the full folder from GitHub.

name: layered-architecture
description: Use when generating or modifying any Spring Boot class — controllers, services, repositories, DTOs, mappers, or configuration. Enforces strict layer separation and prevents business logic from leaking across boundaries.

Layered Architecture

Layer Rules

@RestController        ← HTTP only. No business logic. No JPA entities in responses.
      ↓ DTOs
@Service               ← All business logic lives here. Orchestrates repositories.
      ↓ Domain objects / Entities
@Repository            ← Data access only. No business logic. Returns entities or projections.
      ↓ JPA / JDBC
Database

Controller Layer

Handles HTTP: parsing requests, validating input (@Valid), returning responses
Calls ONE service method per endpoint — no orchestration in controllers
Never returns @Entity classes directly — always map to response DTOs
Never injects @Repository — always goes through a @Service
Exception handling via @ControllerAdvice, never try/catch in controllers

java

// ✅ GOOD
@PostMapping("/orders")
public ResponseEntity<OrderResponse> createOrder(@Valid @RequestBody CreateOrderRequest request) {
    Order order = orderService.createOrder(request);
    return ResponseEntity.status(HttpStatus.CREATED).body(OrderResponse.from(order));
}

// ❌ BAD — business logic in controller
@PostMapping("/orders")
public ResponseEntity<Order> createOrder(@RequestBody CreateOrderRequest request) {
    if (request.getItems().isEmpty()) throw new RuntimeException("No items");
    Order order = orderRepository.save(new Order(request)); // direct repo access
    return ResponseEntity.ok(order); // returning entity
}

Service Layer

Contains all business logic, validation rules, and orchestration
@Transactional lives here, not in controllers or repositories
Constructor injection only — never @Autowired field injection
One service per aggregate root (OrderService, not OrderAndPaymentService)
Returns domain objects or DTOs — never HttpServletRequest / HttpServletResponse

java

// ✅ GOOD
@Service
@RequiredArgsConstructor
public class OrderService {
    private final OrderRepository orderRepository;
    private final InventoryService inventoryService;

    @Transactional
    public Order createOrder(CreateOrderRequest request) {
        inventoryService.reserve(request.getItems());
        Order order = Order.from(request);
        return orderRepository.save(order);
    }
}

// ❌ BAD — field injection, HTTP concern in service
@Service
public class OrderService {
    @Autowired private OrderRepository orderRepository;

    public ResponseEntity<Order> createOrder(...) { ... } // HTTP type in service
}

Repository Layer

Extends JpaRepository<Entity, ID> or CrudRepository
Custom queries via @Query or query derivation — no raw SQL unless unavoidable
Returns entities or Spring Data Projections — never raw Object[]
No business logic — pure data access

DTOs

Separate Request / Response DTOs — never use the same class for both
Validation annotations (@NotNull, @Size, etc.) on Request DTOs only
Static factory method ResponseDto.from(Entity entity) for mapping
Use records for immutable DTOs (Java 16+)

java

// ✅ GOOD
public record OrderResponse(UUID id, String status, List<LineItemResponse> items) {
    public static OrderResponse from(Order order) {
        return new OrderResponse(order.getId(), order.getStatus().name(),
            order.getItems().stream().map(LineItemResponse::from).toList());
    }
}

Mapper Pattern

Keep mapping logic out of controllers and services — use dedicated mapper classes or static factory methods
Mapper is a plain class or utility — not a Spring bean unless it needs injected dependencies
Entity → Response DTO: static method on the response DTO (OrderResponse.from(order))
Request DTO → Entity: static factory on the entity (Order.from(request)) or a mapper class
Collection mapping: use .stream().map(OrderResponse::from).toList() — never manual loops

java

// ✅ GOOD — dedicated mapper for complex mappings
public class OrderMapper {

    public static OrderResponse toResponse(Order order) {
        return new OrderResponse(
            order.getId(),
            order.getStatus().name(),
            order.getItems().stream().map(OrderMapper::toLineItem).toList(),
            order.getCreatedAt()
        );
    }

    public static Order toEntity(CreateOrderRequest request, User user) {
        Order order = Order.create(request.customerEmail(), user);
        request.items().forEach(item ->
            order.addItem(item.productId(), item.quantity()));
        return order;
    }

    private static LineItemResponse toLineItem(OrderItem item) {
        return new LineItemResponse(item.getProductId(), item.getQuantity(), item.getPrice());
    }
}

Show full SKILL.md (140 more words)Show less

Configuration Layer

@Configuration classes live in a config/ package — never in service/ or controller/
Configuration never imports service or controller classes
Use @ConfigurationProperties for type-safe config — never raw @Value for groups of related settings
Bean definitions for infrastructure concerns only (RestTemplate, ObjectMapper, SecurityFilterChain)

Cross-Cutting Concerns

Logging: use @Slf4j — never System.out.println
Validation: @Valid on controller parameters, custom validators as @Component
Exception handling: single @RestControllerAdvice class, never try/catch in controllers
Auditing: @CreatedDate / @LastModifiedDate with @EnableJpaAuditing

Gotchas

Agent tends to put @Transactional on controllers — move it to services
Agent uses @Autowired field injection — always use constructor injection (@RequiredArgsConstructor)
Agent returns List<Entity> from controllers — always map to List<ResponseDto>
Agent creates OrderAndInventoryService god classes — split by aggregate
Agent puts mapping logic inside controllers — extract to mapper class or DTO factory method
Agent creates @Configuration classes that depend on @Service beans — configuration should only wire infrastructure

Files

SKILL.md and 6 other files in skills/spring-boot-3/layered-architecture of rrezartprebreza/spring-boot-skills.

SKILL.md
agents/openai.yaml
examples/bad-service.java
examples/good-service.java
templates/CreateOrderRequest.java
templates/OrderMapper.java
templates/OrderResponse.java

Open the folder on GitHubat commit f0c06a0

Compare with similar skills

Layered Architecture next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Layered Architecture compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Layered Architecture this skillrrezartprebreza/spring-boot-skills	301	—	~1.5k	Automated safety check: Pass	MIT	19 days ago
Spring Bootpiomin/claude-ai-spring-boot	1.3k	—	~2k	Automated safety check: Pass	Apache-2.0	5 mo ago
Dr Jskilljdubois/dr-jskill	342	—	~4.6k	Automated safety check: Notes	Apache-2.0	11 days ago
WxJava Integration Guidebinarywang/WxJava	33k	—	~123	Automated safety check: Pass	Apache-2.0	yesterday
Grails Developer Guideapache/grails-core	2.9k	—	~4.9k	Automated safety check: Pass	Apache-2.0	today
Flycms Devsunkaifei/FlyCms	656	—	~827	Automated safety check: Pass	MIT	2 days ago

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Works with

Spring Boot

Questions about Layered Architecture

What does Layered Architecture do?

A skill your agent uses when generating or modifying any Spring Boot class — controllers, services, repositories, DTOs, mappers, or configuration. Layered Architecture is an agent skill from rrezartprebreza/spring-boot-skills. Use when generating or modifying any Spring Boot class — controllers, services, repositories, DTOs, mappers, or configuration.

When should I use Layered Architecture?

Layered Architecture fits situations like: modifying any Spring Boot class — controllers; tasks that involve Backend development.

How do I install Layered Architecture in Claude Code?

Run `npx skills add rrezartprebreza/spring-boot-skills --skill layered-architecture -a claude-code`. Or copy the skill folder (skills/spring-boot-3/layered-architecture in rrezartprebreza/spring-boot-skills) into .claude/skills/layered-architecture in your project. Claude Code loads it when a task matches its description.

How do I install Layered Architecture in Codex?

Run `npx skills add rrezartprebreza/spring-boot-skills --skill layered-architecture -a codex`. Or copy the skill folder (skills/spring-boot-3/layered-architecture in rrezartprebreza/spring-boot-skills) into .agents/skills/layered-architecture in your project. Codex loads it when a task matches its description.

Can I use Layered Architecture in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add rrezartprebreza/spring-boot-skills --skill layered-architecture -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/layered-architecture, .gemini/skills/layered-architecture, .github/skills/layered-architecture and .opencode/skills/layered-architecture in your project.

What does Layered Architecture need to run?

Going by SKILL.md and its folder, Layered Architecture needs Java for the scripts in its folder.

Does Layered Architecture access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Layered Architecture safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Layered Architecture use?

Layered Architecture is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Layered Architecture use?

About 1.5k tokens (SKILL.md is roughly 6.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Layered Architecture?

Skills that share tags, products or a category with Layered Architecture: Spring Boot (piomin/claude-ai-spring-boot, 1.3k stars), Dr Jskill (jdubois/dr-jskill, 342 stars), WxJava Integration Guide (binarywang/WxJava, 33k stars) and Grails Developer Guide (apache/grails-core, 2.9k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Layered Architecture?

rrezartprebreza (a GitHub user) maintains it in rrezartprebreza/spring-boot-skills, which has 301 GitHub stars. The repository holds 51 skills in this directory. The repository was last updated on September 21, 2026.

Source: rrezartprebreza/spring-boot-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Layered Architecture

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Layered Architecture

Layer Rules

Controller Layer

Service Layer

Repository Layer

DTOs

Mapper Pattern

Configuration Layer

Cross-Cutting Concerns

Gotchas

Files

Compare with similar skills

Similar skills

More from rrezartprebreza/spring-boot-skills

Related

Questions about Layered Architecture