111-java-maven-dependencies

111-java-maven-dependencies is a skill for Claude Code, Codex from jabrena/plinth. It costs 133 tokens per session (1,298 once invoked), scanned A, original, Apache-2.0.

A guided way to add selected Maven libraries to a Java project. It covers nullness annotations, compile-time checks, functional programming utilities, architecture tests, and money and currency types.

In plain words
What is it for?
Use it to add tools such as JSpecify for documenting null values, Error Prone and NullAway for compile-time checks, ArchUnit for architecture rules, or JavaMoney for monetary values.
Why use it?
It helps improve code safety and domain modelling while preserving the project's existing setup. It first checks that the Maven project is valid and asks which libraries you actually want.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to add tools such as JSpecify for documenting null values, Error Prone and NullAway for compile-time checks, ArchUnit for architecture rules, or JavaMoney for monetary values.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jabrena/plinth/111-java-maven-dependencies
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add jabrena/plinth --skill 111-java-maven-dependencies
Clone the repo
git clone --depth 1 https://github.com/jabrena/plinth

Made for: Claude Code, Codex.

Its marketplace also offers this one on its own, as the plugin 111-java-maven-dependencies — /plugin install 111-java-maven-dependencies after adding the marketplace above.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

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README.md
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Your own site · 80×15
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Per session 133 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,298 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00133 $0.01298
Opus 5.5 $0.00053 $0.00519
Sonnet 5.5 $0.00027 $0.00260
Haiku 4.5 $0.00013 $0.00130

Measured 23d ago against content hash fc5ada7314d0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

111-java-maven-dependencies scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 23d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/111-java-maven-dependencies/SKILL.md · 106 lines

How it starts

The opening of the file, as written. The whole thing — 106 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Add Maven dependencies for improved code quality

Add essential Maven dependencies that enhance code quality, safety, and domain modeling through a consultative, question-driven approach. This is an interactive SKILL.

What is covered in this Skill?

  • JSpecify: (nullness annotations, provided scope)
  • Error Prone + NullAway: (enhanced static analysis with compile-time null checking)
  • VAVR: (functional programming with Try/Either and immutable collections)
  • ArchUnit: (architecture rule enforcement, test scope)
  • JavaMoney: (Money and Currency API support with JSR 354 and Moneta)

Constraints

Before adding Maven dependencies, ensure the project is in a valid state. Use a consultative, question-driven flow that adds only what the user selects.

  • MANDATORY: Run ./mvnw validate or mvn validate before any changes
  • SAFETY: If validation fails, stop and ask the user to fix issues—do not proceed until resolved
  • BEFORE READING DEPENDENCY REFERENCES: Run the question flow embedded in this SKILL.md first. Ask one consolidated dependency-selection question, then ask only conditional follow-up questions required by the selected options. Read only the dependency references selected by the user's answers. Use consultative language, present trade-offs, and wait for user responses before implementing

When to use this skill

  • Add Maven dependencies
  • Add JSpecify nullness dependencies
  • Add Error Prone NullAway dependencies
  • Add VAVR functional dependencies
  • Add ArchUnit architecture testing dependencies
  • Add JavaMoney dependencies

Workflow

  1. Validate project before changes

Run ./mvnw validate or mvn validate and stop if validation fails.

  1. Ask dependency assessment questions before reading references

Run this XML-included question flow before reading any dependency implementation reference. Ask the consolidated dependency-selection question first, wait for the user's answer, and record selected dependency families before continuing. Ask conditional follow-up questions only when required by the selected dependencies.

Read the full file on GitHub · 106 lines

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 23d ago Changed fc5ada7314d0
  2. 1mo ago First seen · 106 lines · 133 tokens per session scan A 57bd4c7e23b7

Subscribe to this mod's changes

111-java-maven-dependencies is a skill published in the GitHub repository jabrena/plinth (454 stars, last pushed yesterday), licensed Apache-2.0. It adds 133 tokens to every session and 1,298 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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