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Agent skill

Spring Boot 3

by Gentleman-Programming in Gentleman-Programming/Gentleman-Skills

Spring Boot 3 patterns for configuration, DI, and web services.

MITAuto-check passedBackend & APIs

Install Spring Boot 3

skills CLI
$ npx skills add Gentleman-Programming/Gentleman-Skills --skill spring-boot-3 -a claude-code

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

GitHub CLI
$ gh skill install Gentleman-Programming/Gentleman-Skills spring-boot-3 --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/Gentleman-Programming/Gentleman-Skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/community/spring-boot-3 .claude/skills/spring-boot-3 && 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/

Facts

Skill name
spring-boot-3
GitHub stars
657
Token cost
~919 tokens
SKILL.md length
129 words
Files
1
Skills in repo
23
Repo updated
First seen
Licence
MIT

At a glance

Spring Boot 3 patterns for configuration, DI, and web services.

  • Tasks that involve Backend development
  • SKILL.md covers When to Use, Critical Patterns, Code Examples and Anti-Patterns, plus 2 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Spring Boot 3 is an agent skill from Gentleman-Programming/Gentleman-Skills. Spring Boot 3 patterns for configuration, DI, and web services. Trigger: When building or refactoring Spring Boot 3 applications.

Its SKILL.md is about 920 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Backend & APIs, covering Backend development. It works with Spring Boot. The repository describes itself as: Community-driven AI agent skills for Claude Code, OpenCode, and other AI assistants. Curated patterns and community contributions. The licence is MIT.

When your agent uses it

  • Tasks that involve Backend development

Example prompts

  • “/spring-boot-3”

What it can do on your machine

Read from SKILL.md and the folder at commit c8036a3. 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

    No scripts in the folder and no shell commands in SKILL.md (its code samples are java).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Links to these hosts (documentation or services it may open):

    • docs.spring.io

    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

Spring Boot 3 loads about 919 tokens when it runs. Until then it costs about 36 tokens; SKILL.md has 129 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~36
When it runs · the whole SKILL.md, loaded when a task matches
~919

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 Gentleman-Programming/Gentleman-Skills at commit c8036a3, republished under its MIT licence (© Gentleman-Programming). 129 words, ~919 tokens.

Download SKILL.mdSave it as .claude/skills/spring-boot-3/SKILL.md (or your agent's skills folder).
name
spring-boot-3
description
Spring Boot 3 patterns for configuration, DI, and web services. Trigger: When building or refactoring Spring Boot 3 applications.
metadata.author
diegnghrmr
metadata.version
1.0

When to Use

Load this skill when:

  • Building a Spring Boot 3.3+ service or API
  • Wiring beans with dependency injection
  • Defining configuration properties and validation
  • Implementing REST controllers and service layers

Critical Patterns

Pattern 1: Constructor injection only

Always use constructor injection; avoid field injection.

Pattern 2: Typed configuration properties

Use @ConfigurationProperties with validation, not scattered @Value.

Pattern 3: Transaction boundaries at service layer

Apply @Transactional on application services, not controllers.

Code Examples

Example 1: Configuration properties with validation
java
package com.acme.config;

import jakarta.validation.constraints.NotBlank;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.validation.annotation.Validated;

@Validated
@ConfigurationProperties(prefix = "payment")
public record PaymentProperties(
  @NotBlank String provider,
  @NotBlank String apiKey
) { }
java
package com.acme;

import org.springframework.boot.context.properties.ConfigurationPropertiesScan;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@ConfigurationPropertiesScan
public class Application { }
Example 2: Service with constructor injection + transaction
java
package com.acme.order.application;

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
public final class OrderService {
  private final OrderRepository repository;

  public OrderService(OrderRepository repository) {
    this.repository = repository;
  }

  @Transactional
  public void placeOrder(OrderCommand command) {
    repository.save(command.toEntity());
  }
}
Example 3: REST controller with DTO records
java
package com.acme.order.api;

import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

@RestController
@RequestMapping("/orders")
public final class OrderController {
  private final OrderService service;

  public OrderController(OrderService service) {
    this.service = service;
  }

  @PostMapping
  public ResponseEntity<OrderResponse> place(@RequestBody OrderRequest request) {
    service.placeOrder(request.toCommand());
    return ResponseEntity.ok(new OrderResponse("ok"));
  }

  public record OrderRequest(String sku, int qty) {
    public OrderCommand toCommand() { return new OrderCommand(sku, qty); }
  }

  public record OrderResponse(String status) { }
}

Anti-Patterns

Don't: Use field injection
java
// BAD: field injection
@Service
public class OrderService {
  @org.springframework.beans.factory.annotation.Autowired
  private OrderRepository repository;
}
Don't: Scatter configuration with @Value
java
// BAD: hard to validate and test
@Service
public class PaymentService {
  @org.springframework.beans.factory.annotation.Value("${payment.apiKey}")
  private String apiKey;
}

Quick Reference

TaskPattern
Inject dependenciesConstructor injection only
Read config@ConfigurationProperties + @Validated
Transactions@Transactional on services

Resources

© Gentleman-Programming, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in community/spring-boot-3 of Gentleman-Programming/Gentleman-Skills.

Open the folder on GitHubat commit c8036a3

Compare with similar skills

Spring Boot 3 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.

Spring Boot 3 compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Spring Boot 3 this skillGentleman-Programming/Gentleman-Skills657—~919Automated safety check: PassMIT
Spring Bootpiomin/claude-ai-spring-boot1.3k—~2kAutomated safety check: PassApache-2.0
Dr Jskilljdubois/dr-jskill342—~4.6kAutomated safety check: NotesApache-2.0
WxJava Integration Guidebinarywang/WxJava33k—~123Automated safety check: PassApache-2.0
Grails Developer Guideapache/grails-core2.9k—~4.9kAutomated safety check: PassApache-2.0
Flycms Devsunkaifei/FlyCms656—~827Automated safety check: PassMIT

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Works with

Categories

Questions about Spring Boot 3

What does Spring Boot 3 do?

Spring Boot 3 patterns for configuration, DI, and web services. Spring Boot 3 is an agent skill from Gentleman-Programming/Gentleman-Skills. Spring Boot 3 patterns for configuration, DI, and web services.

When should I use Spring Boot 3?

Spring Boot 3 fits situations like: tasks that involve Backend development.

How do I install Spring Boot 3 in Claude Code?

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

How do I install Spring Boot 3 in Codex?

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

Can I use Spring Boot 3 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 Gentleman-Programming/Gentleman-Skills --skill spring-boot-3 -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/spring-boot-3, .gemini/skills/spring-boot-3, .github/skills/spring-boot-3 and .opencode/skills/spring-boot-3 in your project.

What does Spring Boot 3 need to run?

SKILL.md names no scripts, command-line tools or credentials: Spring Boot 3 is instructions for the agent only.

Does Spring Boot 3 access the network?

SKILL.md names 1 domain. As links in the text: docs.spring.io. This is read from the text; nothing was executed.

Is Spring Boot 3 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 Spring Boot 3 use?

Spring Boot 3 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 Spring Boot 3 use?

About 919 tokens (SKILL.md is roughly 3.7k 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 Spring Boot 3?

Skills that share tags, products or a category with Spring Boot 3: 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 Spring Boot 3?

Gentleman-Programming (a GitHub organization) maintains it in Gentleman-Programming/Gentleman-Skills, which has 657 GitHub stars. The repository holds 23 skills in this directory. The repository was last updated on March 28, 2026.

Source: Gentleman-Programming/Gentleman-Skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.