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Agent skill

305 Frameworks Spring Boot Modulith

by jabrena in jabrena/plinth

A skill your agent uses when you need to design, review, or improve modular monoliths with Spring Modulith in Spring Boot applications - including application module package structure…

Apache-2.0Auto-check passedBackend & APIs

Install 305 Frameworks Spring Boot Modulith

skills CLI
$ npx skills add jabrena/plinth --skill 305-frameworks-spring-boot-modulith -a claude-code

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

GitHub CLI
$ gh skill install jabrena/plinth 305-frameworks-spring-boot-modulith --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/jabrena/plinth.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/305-frameworks-spring-boot-modulith .claude/skills/305-frameworks-spring-boot-modulith && 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
305-frameworks-spring-boot-modulith
GitHub stars
446
Token cost
~912 tokens
SKILL.md length
318 words
Files
2 (incl. references)
Skills in repo
124
Repo updated
First seen
Licence
Apache-2.0

At a glance

A skill your agent uses when you need to design, review, or improve modular monoliths with Spring Modulith in Spring Boot applications - including application module package structure…

  • You need to design
  • SKILL.md covers Constraints, When to use this skill, Workflow and Reference
  • Calls mvn
  • Improve modular monoliths with Spring Modulith in Spring Boot applications - including application module package structure

What it does

305 Frameworks Spring Boot Modulith is an agent skill from jabrena/plinth. Use when you need to design, review, or improve modular monoliths with Spring Modulith in Spring Boot applications - including application module package structure, ApplicationModules verification, named interfaces, allowed dependencies, domain events, @ApplicationModuleTest, Scenario-based module tests, generated documentation, actuator exposure, observability, and event publication registry choices. This should trigger for requests such as Add Spring Modulith to a Spring Boot application; Review Spring Modulith…

Its SKILL.md is about 910 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/305-frameworks-spring-boot-modulith.md`).

It sits in Backend & APIs, covering Backend development. It works with Spring Boot. The repository describes itself as: Plinth is an AI-native engineering toolkit for modern Java enterprise SDLC, built around reusable Commands, Agents, Skills, and MCP Servers. The licence is Apache-2.0.

When your agent uses it

  • You need to design
  • Improve modular monoliths with Spring Modulith in Spring Boot applications - including application module package structure
  • ApplicationModules verification
  • Named interfaces

Example prompts

  • “/305-frameworks-spring-boot-modulith”

What it can do on your machine

Read from SKILL.md and the folder at commit dca88dc. 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

    Shell commands in SKILL.md call:

    • mvn

    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

305 Frameworks Spring Boot Modulith loads about 912 tokens when it runs, and up to ~5.9k if it reads all its reference files. Until then it costs about 181 tokens; SKILL.md has 318 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~181
When it runs · the whole SKILL.md, loaded when a task matches
~912
With references · SKILL.md plus every file in references/, read only if the agent opens them
~5.9k

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 jabrena/plinth at commit dca88dc, republished under its Apache-2.0 licence (© jabrena). 318 words, ~912 tokens.

Download SKILL.mdSave it as .claude/skills/305-frameworks-spring-boot-modulith/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
305-frameworks-spring-boot-modulith
description
Use when you need to design, review, or improve modular monoliths with Spring Modulith in Spring Boot applications - including application module package structure, ApplicationModules verification, named interfaces, allowed dependencies, domain events, @ApplicationModuleTest, Scenario-based module tests, generated documentation, actuator exposure, observability, and event publication registry choices. This should trigger for requests such as Add Spring Modulith to a Spring Boot application; Review Spring Modulith module boundaries; Improve modular monolith architecture in Spring Boot; Add @ApplicationModuleTest tests; Generate Spring Modulith documentation. Part of Plinth Toolkit
license
Apache-2.0
metadata.author
Juan Antonio Breña Moral
metadata.version
0.19.0

Spring Boot - Spring Modulith

Apply Spring Modulith guidelines for Spring Boot modular monoliths.

What is covered in this Skill?

  • Spring Modulith BOM and starter dependency selection
  • Business-capability package structure for application modules
  • ApplicationModules verification and architecture tests
  • Named interfaces and explicit allowed dependencies
  • Domain events for loose coupling between modules
  • @ApplicationModuleTest and Scenario-based module integration tests
  • Generated module documentation, actuator exposure, and observability
  • Event publication registry choices for reliable domain events

Scope: Apply recommendations based on the reference rules, official Spring Modulith documentation, and good/bad examples.

Constraints

Before applying Spring Modulith changes, ensure the project compiles. After improvements, run full verification including module structure tests.

  • MANDATORY: Run ./mvnw compile or mvn compile before applying any change
  • PRECONDITION: The project must be a Spring Boot application; for non-Boot Java modularity use architecture or design skills instead
  • BASELINE: Align dependency choices with Spring Boot 4.0.x and the Spring Modulith compatibility matrix
  • SAFETY: If compilation fails, stop immediately
  • VERIFY: Run ./mvnw clean verify or mvn clean verify after applying improvements
  • BEFORE APPLYING: Read the reference for detailed rules, good/bad patterns, and official documentation links

When to use this skill

  • Add Spring Modulith to a Spring Boot application
  • Review Spring Modulith module boundaries
  • Improve modular monolith architecture in Spring Boot
  • Add @ApplicationModuleTest tests
  • Generate Spring Modulith documentation
  • Refactor Spring Boot modules with Spring Modulith

Workflow

  1. Read reference and inspect project structure

Read references/305-frameworks-spring-boot-modulith.md and inspect the Spring Boot version, Maven dependencies, main application package, and current package/module boundaries.

  1. Model application modules

Identify business-capability modules, public APIs, internal packages, named interfaces, and intentional allowed dependencies.

  1. Apply framework-aligned changes

Add or refine Spring Modulith dependencies, package annotations, architecture verification tests, domain events, and module tests following the reference patterns.

  1. Run verification and report results

Execute appropriate build/tests, especially ApplicationModules.verify() and @ApplicationModuleTest coverage, then summarize changes, risks, and follow-up module design work.

Reference

For detailed guidance, examples, and constraints, see references/305-frameworks-spring-boot-modulith.md.

© jabrena, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file (references) in skills/305-frameworks-spring-boot-modulith of jabrena/plinth.

  • SKILL.md
  • references/305-frameworks-spring-boot-modulith.md

Open the folder on GitHubat commit dca88dc

Compare with similar skills

305 Frameworks Spring Boot Modulith 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.

305 Frameworks Spring Boot Modulith compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
305 Frameworks Spring Boot Modulith this skilljabrena/plinth446—~912Automated safety check: PassApache-2.0
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 305 Frameworks Spring Boot Modulith

What does 305 Frameworks Spring Boot Modulith do?

A skill your agent uses when you need to design, review, or improve modular monoliths with Spring Modulith in Spring Boot applications - including application module package structure…. 305 Frameworks Spring Boot Modulith is an agent skill from jabrena/plinth. Use when you need to design, review, or improve modular monoliths with Spring Modulith in Spring Boot applications - including application module package structure, ApplicationModules verification, named interfaces, allowed dependencies, domain events, @ApplicationModuleTest, Scenario-based module tests, generated documentation, actuator exposure, observability, and event publication registry choices.

When should I use 305 Frameworks Spring Boot Modulith?

305 Frameworks Spring Boot Modulith fits situations like: you need to design; improve modular monoliths with Spring Modulith in Spring Boot applications - including application module package structure; applicationModules verification; named interfaces.

How do I install 305 Frameworks Spring Boot Modulith in Claude Code?

Run `npx skills add jabrena/plinth --skill 305-frameworks-spring-boot-modulith -a claude-code`. Or copy the skill folder (skills/305-frameworks-spring-boot-modulith in jabrena/plinth) into .claude/skills/305-frameworks-spring-boot-modulith in your project. Claude Code loads it when a task matches its description.

How do I install 305 Frameworks Spring Boot Modulith in Codex?

Run `npx skills add jabrena/plinth --skill 305-frameworks-spring-boot-modulith -a codex`. Or copy the skill folder (skills/305-frameworks-spring-boot-modulith in jabrena/plinth) into .agents/skills/305-frameworks-spring-boot-modulith in your project. Codex loads it when a task matches its description.

Can I use 305 Frameworks Spring Boot Modulith 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 jabrena/plinth --skill 305-frameworks-spring-boot-modulith -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/305-frameworks-spring-boot-modulith, .gemini/skills/305-frameworks-spring-boot-modulith, .github/skills/305-frameworks-spring-boot-modulith and .opencode/skills/305-frameworks-spring-boot-modulith in your project.

What does 305 Frameworks Spring Boot Modulith need to run?

Going by SKILL.md and its folder, 305 Frameworks Spring Boot Modulith needs the command-line tools its instructions call (mvn).

Does 305 Frameworks Spring Boot Modulith 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 305 Frameworks Spring Boot Modulith 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 305 Frameworks Spring Boot Modulith use?

305 Frameworks Spring Boot Modulith is published under the Apache-2.0 licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does 305 Frameworks Spring Boot Modulith use?

About 912 tokens (SKILL.md is roughly 3.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 5k tokens, read only when the agent opens those files.

What are the alternatives to 305 Frameworks Spring Boot Modulith?

Skills that share tags, products or a category with 305 Frameworks Spring Boot Modulith: 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 305 Frameworks Spring Boot Modulith?

jabrena (a GitHub user) maintains it in jabrena/plinth, which has 446 GitHub stars. The repository holds 124 skills in this directory. The repository was last updated on October 7, 2026.

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