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minecraft-agent-skills: Skill for Claude Code

.agents/skills/minecraft-testing/SKILL.md

minecraft-testing is a skill for Claude Code, Codex from Jahrome907/minecraft-agent-skills. It costs 57 tokens per session (3,593 once invoked), scanned A, original, MIT.

A guide for writing and running automated tests for Minecraft mods and plugins. It covers ordinary Java tests, mocked servers, in-game GameTests, and full test servers for Minecraft 26.x and 1.21.x.

In plain words
What is it for?
Use it to test logic, data structures, NBT data, plugin events, commands, inventories, blocks, entities, world interactions, and complete mod or plugin lifecycles.
Why use it?
It helps check code automatically without relying on manual playtesting for every change. It also helps choose between tests that run without Minecraft and tests that need a game environment.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is Jahrome907/minecraft-agent-skills's own configuration. It tells Claude Code and Codex how to work on minecraft-agent-skills 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 minecraft-agent-skills configures →

not rated 197repo +2 changed 7d ago A scan SkillSpector: pass 57 tokens original MIT
View source ↗ Jahrome907/minecraft-agent-skills
Reuse

Borrowing it

Nothing to install: this file belongs to Jahrome907/minecraft-agent-skills. 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/Jahrome907/minecraft-agent-skills/main/.agents/skills/minecraft-testing/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/Jahrome907/minecraft-agent-skills

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 minecraft-testing

README.md
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Your own site
<a href="https://agentmods.dev/skills/jahrome907/minecraft-agent-skills/minecraft-testing"><img src="https://agentmods.dev/badge/skills/jahrome907/minecraft-agent-skills/minecraft-testing/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 minecraft-testing

Your own site · 80×15
<a href="https://agentmods.dev/skills/jahrome907/minecraft-agent-skills/minecraft-testing"><img src="https://agentmods.dev/badge/skills/jahrome907/minecraft-agent-skills/minecraft-testing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 57 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,593 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 $0.00057 $0.03593
Opus 5.5 $0.00023 $0.01437
Sonnet 5.5 $0.00011 $0.00719
Haiku 4.5 $0.00006 $0.00359

Measured 7d ago against content hash d01ca4609902, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

minecraft-testing 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 7d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/validate-test-layout.sh), 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.

.agents/skills/minecraft-testing/SKILL.md · 484 lines

How it starts

The opening of the file, as written. The whole thing — 484 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Minecraft Testing Skill

Testing Strategies Overview

Approach Best For Requires Game?
JUnit Jupiter (pure unit tests) Logic, data structures, NBT serialization No
MockBukkit Bukkit/Paper plugin events, commands, inventory No (mocked server)
NeoForge GameTests In-game block/entity/world interaction Yes (test environment)
Fabric GameTests In-game block/entity/world interaction Yes (test environment)
Integration server Full plugin/mod lifecycle Yes (dedicated test server)

Use Java 25 for current 26.x projects. Keep legacy 1.21.x examples on Java 21 and Forge 1.20.1 on Java 17. Do not combine source layouts or APIs across versions.

Routing Boundaries

  • Use when: the task is designing or implementing automated tests (unit, mock, gametest, CI test jobs) for Minecraft projects.
  • Do not use when: the task is implementing gameplay features rather than testing them (minecraft-modding, minecraft-plugin-dev, minecraft-datapack).
  • Do not use when: the task is release automation or publishing pipelines (minecraft-ci-release).

Bundled References And Helpers

  • Layout guide: references/test-layouts.md
  • Fixture/layout validator: ./scripts/validate-test-layout.sh --root <project>

Use the validator before copying a test layout into a real project. It checks visible static dependencies, metadata, and literal structure references. It does not compile the project or prove a Game Test can run.

Unit Testing (JUnit Jupiter — No Minecraft)

JUnit Platform task

tasks.test {
    useJUnitPlatform()
    testLogging {
        events("passed", "skipped", "failed")
    }
}

For Fabric code that needs loader setup, use Fabric Loader JUnit rather than assuming ordinary JUnit initialized Minecraft:

dependencies {
    testImplementation "net.fabricmc:fabric-loader-junit:${project.loader_version}"
}

test {
    useJUnitPlatform()
}

Read the full file on GitHub · 484 lines

Files

What ships with it

2 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. 7d ago Changed · -3 lines d01ca4609902
  2. 26d ago Changed · +4 lines fb197b0944c7
  3. 1mo ago Changed 602ef1d62d3e
  4. 2mo ago Changed · +2 tokens per session ac275213119b
  5. 2mo ago First seen · 483 lines · 55 tokens per session scan A 2ebc374d3c5e

Subscribe to this mod's changes

minecraft-testing is a skill published in the GitHub repository Jahrome907/minecraft-agent-skills (197 stars, last pushed 8d ago), licensed MIT. It adds 57 tokens to every session and 3,593 once invoked, about $0.0002 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 2026-08-30.

TestingUnit testingcodexfabricminecraftminecraft-datapackminecraft-moddingminecraft-plugin
Related

minecraft-testing compared with skills from other repositories

minecraft-testing next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
minecraft-testingJahrome907/minecraft-agent-skillsSkill1978d agoMITA57Claude Code, Codex
test-masterJeffallan/claude-skillsSkill12k7d agoMITA104Claude Code
migrate-xunit-to-xunit-v3dotnet/skillsSkill5.8kyesterdayMITA149Claude Code
go-testingGentleman-Programming/gentle-aiSkill8.4kyesterdayMITA26Claude Code, Codex
principle-test-behavior-not-implementationmichael-denyer/pstack-claudeSkill4.1kyesterdayMITA50Claude Code
dart-testdartsim/dartSkill1.2kyesterdayBSD-2-ClauseA18Claude Code, Codex
test-generatorrshankras/claude-code-apple-skillsSkill8642d agoMITA33Claude Code