8 Essential Claude Code Skills to Supercharge Your Spring Boot Projects

What Is a Skill

Claude Code Skills are a set of Markdown files placed under the .claude/skills/ directory. Each Skill lives in its own folder and contains at least one SKILL.md file.

.claude/
└── skills/
    ├── spring-boot-engineer/
    │   └── SKILL.md
    ├── java-architect/
    │   └── SKILL.md
    └── jpa-patterns/
        └── SKILL.md

The SKILL.md file starts with a YAML front‑matter. The description field is crucial because Claude matches a user’s prompt to a Skill based on this description.

After configuring Skills, run the /skills command in Claude Code to view the loaded Skill list.

8 Skills Worth Configuring

1. spring-boot-engineer – the basic must‑have

Source: piomin/claude-ai-spring-boot Problem solved: tells Claude the project’s layer conventions, code organization, and technology‑stack versions.

Typical project layout example:

src/main/java/your.package/
├── controller   # REST endpoints
├── service      # business logic
├── repository   # data access
├── model        # entity classes
├── dto          # request/response DTOs
├── config       # configuration classes
└── exception    # custom exceptions and global handling

Skill content includes a development workflow list (Analyze, Design, Implement, Secure, Test, Deploy).

Configuration command:

mkdir -p .claude/skills/spring-boot-engineer
# paste SKILL.md content or clone the repository

2. java-architect – think like an architect

Source: piomin/claude-ai-spring-boot, Jeffallan/claude-skills Problem solved: for complex requirements Claude first produces an architecture plan before writing code.

Typical trigger scenarios: microservices, WebFlux, JPA optimisation, Spring Security OAuth2.

Example description snippet shows usage for building, configuring, or debugging enterprise Java applications.

Plan mode is activated with:

### 1. Plan Mode Default
- Enter plan mode for any non‑trivial task (3+ steps or architectural decisions)
- Write detailed specs upfront to reduce ambiguity

3. jpa-patterns – avoid N+1 queries

Source: piomin/claude-ai-spring-boot, a-pavithraa/springboot-skills-marketplace Problem solved: forces Claude to generate JPA code that does not suffer from N+1 queries.

Key JPA rules include using DTO projection, @EntityGraph or JOIN FETCH, prohibiting eager fetch on @OneToMany, paging with Pageable, etc.

## JPA Rules
### Query patterns
- Use DTO Projection instead of returning Entity
- Prefer @EntityGraph or JPQL JOIN FETCH for associations
- Disallow repository calls inside loops
- Pageable required for pagination
### Forbidden patterns
- No eager FetchType on @OneToMany
- Do not expose Entity directly in API responses
- For joins over three tables, use native SQL or QueryDSL

4. java-code-review – built‑in code reviewer

Source: piomin/claude-ai-spring-boot Problem solved: after code generation Claude runs a review against Java best practices.

Review dimensions include architecture compliance, exception handling, transaction management, performance hazards, security checks, and test coverage.

## Review dimensions
- Architecture compliance
- Exception handling
- Transaction management
- Performance hazards (N+1, large queries, memory leaks)
- Security checks (SQL injection, XSS, permission checks)
- Test coverage

5. api-contract-review – API design self‑check

Source: piomin/claude-ai-spring-boot Problem solved: validates RESTful API design before controller generation.

Checklist includes plural nouns in URLs, correct HTTP verbs, unified response structure, ProblemDetail for errors, and paging returning Page objects.

## API contract checklist
- URL paths use plural nouns, no verbs
- Correct HTTP method semantics
- Wrap responses with ResponseEntity
- Use ProblemDetail for error responses
- Paginated endpoints return Page with totalElements and totalPages

6. spring-boot-testing – testing built in

Source: decebals/claude-code-java, a-pavithraa/springboot-skills-marketplace Problem solved: generates both unit and integration tests that follow recommended practices.

Testing rules specify JUnit 5 + Mockito for unit tests, @SpringBootTest + Testcontainers for integration, and forbid using H2 for real‑database tests or running all tests with @SpringBootTest.

## Test rules
### Unit tests
- JUnit 5 + Mockito
- Cover normal and exception paths
- Use @ExtendWith(MockitoExtension.class)
### Integration tests
- @SpringBootTest + Testcontainers
- Real PostgreSQL/MySQL containers, not H2
- @WebMvcTest + MockMvc for controller tests
### Prohibited
- No H2 as a replacement for real DB in integration tests
- Do not run all tests with @SpringBootTest (slow)

7. security-audit – expose security issues early

Source: piomin/claude-ai-spring-boot Problem solved: audits generated code for common security flaws.

Audit dimensions cover SQL injection, XSS, permission checks, sensitive data exposure, CSRF protection, and JWT configuration.

## Security audit checklist
- SQL injection: no raw SQL without parameters
- XSS: ensure output is escaped
- Permission checks: @PreAuthorize on each endpoint
- Sensitive data: passwords or tokens not logged or returned
- CSRF protection for state‑changing operations
- JWT: reasonable expiration, signature algorithm, refresh strategy

8. springboot-migration – painless version upgrades

Source: a-pavithraa/springboot-skills-marketplace Problem solved: assists migration from Spring Boot 2.x to 3.x or from 3.x to 4.x.

Workflow: scan project, plan steps (dependency upgrade → code changes → config adjustments), apply changes incrementally, run tests to verify.

1. Scan current project for migration points
2. Plan migration steps (dependency upgrade → code changes → config adjustments)
3. Apply changes step by step, validating each
4. Run tests to confirm migration success

Usage example:

using $springboot-migration upgrade to Spring Boot 4

How to Use the Skills

Step 1: Create directory structure

mkdir -p .claude/skills/spring-boot-engineer
mkdir -p .claude/skills/java-architect
mkdir -p .claude/skills/jpa-patterns
mkdir -p .claude/skills/java-code-review
mkdir -p .claude/skills/api-contract-review
mkdir -p .claude/skills/spring-boot-testing
mkdir -p .claude/skills/security-audit
mkdir -p .claude/skills/springboot-migration

Step 2: Use existing open‑source repositories

Instead of writing SKILL.md from scratch, copy the high‑quality repositories listed below. piomin/claude-ai-spring-boot – complete Spring Boot template with Skill, Agent, CLAUDE.md a-pavithraa/springboot-skills-marketplace – strong on architecture decisions, JPA optimisation, migration decebals/claude-code-java – general Java conventions, complementary to Spring Boot Skills

Copy the SKILL.md files into your project and adjust the description and rules to match your own conventions.

Step 3: Declare loading method in CLAUDE.md

## Skills
- Load skills from `.claude/skills/` directory
- Automatically apply the most relevant skill based on task context
- For architecture decisions, always use plan mode first

Step 4: Verify the Skills are active

/skills

The command lists loaded Skills, confirming the configuration works.

Practical Tips After Using the Skills

Do not overload Claude with too many Skills; eight is the practical limit because more Skills cause matching confusion and higher token consumption.

The description field is more important than the Skill content itself; a clear first sentence stating the invocation scenario prevents mis‑loading.

Align Skills with your project’s actual setup—modify Gradle‑specific rules to Maven if needed, and spend a few minutes tailoring the rules to your codebase for best results.

Combine CLAUDE.md (global project policies) with Skills (scenario‑specific policies) for optimal guidance.

https://github.com/piomin/claude-ai-spring-boot https://github.com/a-pavithraa/springboot-skills-marketplace https://github.com/decebals/claude-code-java https://github.com/Jeffallan/claude-skills