rdf4j: Skill for Claude Code

.agent/skills/mvnf/SKILL.md

mvnf is a skill for Claude Code, Codex from eclipse-rdf4j/rdf4j. It costs 68 tokens per session (1,019 once invoked), scanned A, original, BSD-3-Clause.

A repeatable workflow for running Maven tests in a multi-module Java project.

In plain words
What is it for?
Use it to run module tests, individual test methods, or integration tests in the RDF4J build.
Why use it?
It handles cleanup, dependency installation, test selection, and log locations consistently, reducing manual setup and confusing failures.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Codex.

This is eclipse-rdf4j/rdf4j's own configuration. It tells Claude Code and Codex how to work on rdf4j itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything rdf4j configures →

Reuse

Borrowing it

Nothing to install: this file belongs to eclipse-rdf4j/rdf4j. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/eclipse-rdf4j/rdf4j/main/.agent/skills/mvnf/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/eclipse-rdf4j/rdf4j

Made for: Claude Code, Codex.

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.

agentmods badge for mvnf

README.md
[![agentmods](https://agentmods.dev/badge/skills/eclipse-rdf4j/rdf4j/mvnf/github.svg)](https://agentmods.dev/skills/eclipse-rdf4j/rdf4j/mvnf)
Your own site
<a href="https://agentmods.dev/skills/eclipse-rdf4j/rdf4j/mvnf"><img src="https://agentmods.dev/badge/skills/eclipse-rdf4j/rdf4j/mvnf/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for mvnf

Your own site · 80×15
<a href="https://agentmods.dev/skills/eclipse-rdf4j/rdf4j/mvnf"><img src="https://agentmods.dev/badge/skills/eclipse-rdf4j/rdf4j/mvnf.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 68 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,019 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 $0.00068 $0.01019
Opus 5 $0.00034 $0.00509
Sonnet 5 $0.00014 $0.00204
Haiku 4.5 $0.00007 $0.00102

Measured 8d ago against content hash 9639bb9c6c88, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

mvnf 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 8d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/mvnf.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

.agent/skills/mvnf/SKILL.md · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

mvnf

Run Maven tests with repeatable commands and useful failure pointers.

Quick start

  • Run a module's full test suite:
    • python3 .codex/skills/mvnf/scripts/mvnf.py core/sail/shacl
  • Run a unit test class or method (module auto-detected):
    • python3 .codex/skills/mvnf/scripts/mvnf.py ShaclSailTest
    • python3 .codex/skills/mvnf/scripts/mvnf.py ShaclSailTest#testSomething
  • Run an integration test (Failsafe):
    • python3 .codex/skills/mvnf/scripts/mvnf.py --it ShaclSailIT#testSomething

What it does

  1. Deletes stale target/surefire* and target/failsafe* artifacts for the selected module.
  2. mvn -B -ntp -Dmaven.compiler.showWarnings=false -T 1C -o -Dmaven.repo.local=.m2_repo -Pquick install
  3. mvn -o -Dmaven.repo.local=.m2_repo -pl <module> verify (optionally with -DskipITs -Dtest=... for unit tests or -PskipUnitTests -Dit.test=... for Failsafe ITs)

Root install output is stored in maven-build.log. On success, mvnf prints one root-install summary line with BUILD SUCCESS and the log path. Verify logs use logs/mvnf/*-verify.log when retained or when tests fail. By default, successful Maven phases do not print their output tail; mvnf prints compact Surefire/Failsafe report totals and report paths instead. Failed phases still print the retained Maven tail plus compact report failure details.

For manual root clean installs, keep full output in maven-build.log and print only errors plus the reactor summary:

mvn -B -ntp \
  -Dmaven.compiler.showWarnings=false \
  -T 1C -o -Dmaven.repo.local=.m2_repo -Pquick clean install 2>&1 \
  | tee maven-build.log \
  | awk '
     /\[WARNING\]/ { next }
      /\[ERROR\]/ { print; next }

      /Reactor Summary/ { summary=1 }
      summary { print }
    '

For install without clean, replace clean install with install. For a module install, add -pl <module> -am before -Pquick. Keep the 2>&1 | tee maven-build.log | awk ... tail on every install variant.

If the test run fails, it prints the list of Surefire/Failsafe report files under the module's target/*-reports/ directories. For a handoff-ready block from retained reports, run python3 scripts/agent-evidence.py <module>/target/surefire-reports <module>/target/failsafe-reports.

Read the full file on GitHub · 68 lines

Files

What ships with it

1 file 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. 8d ago First seen · 68 lines · 68 tokens per session scan A 9639bb9c6c88

Subscribe to this mod's changes

mvnf is a skill published in the GitHub repository eclipse-rdf4j/rdf4j (412 stars, last pushed today), licensed BSD-3-Clause. It adds 68 tokens to every session and 1,019 once invoked, about $0.0003 per session on Opus 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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