Minecraft Agent Skills

Thirteen reusable skills for current Minecraft 26.x development and operations, with explicit Minecraft 1.21.x and Forge 1.20.1 legacy lanes. Use raw skills in a project or install the bundled Codex and Claude Code plugin.

Install

Install one copy of each skill for the host you use. Preserve unrelated local skills when a target already exists. Copy only the selected skill folders if you do not need the whole bundle; do not copy this repository's AGENTS.md into a Minecraft project.

Host	Copy or install
Codex	.agents/skills/ into the project's .agents/skills/
Older Codex hosts	.codex/skills/ only if that host uses the legacy location
Claude Code	.claude/skills/ into the project's .claude/skills/
Plugin	.agents/plugins/marketplace.json and plugins/minecraft-codex-skills/

For a Codex plugin install, keep the marketplace file and plugin directory under the same project root, open the plugins surface, and install minecraft-codex-skills. For Claude Code, run:

claude --plugin-dir ./plugins/minecraft-codex-skills

The raw folders and plugin are alternative installation methods. Loading both can expose duplicate skills. minecraft-imagegen needs an image-generation tool supplied by the host or an already connected integration; installing this bundle or selecting a model does not add that tool.

Skills

Skill	Use it for
minecraft-modding	NeoForge, Fabric, and Forge 1.20.1 mods
minecraft-plugin-dev	Paper, Bukkit, and Spigot plugins
minecraft-datapack	Vanilla datapacks, functions, loot, and advancements
minecraft-commands-scripting	Commands, scoreboards, NBT, and RCON scripting
minecraft-multiloader	Architectury projects targeting NeoForge and Fabric
minecraft-testing	JUnit, MockBukkit, and GameTests
minecraft-ci-release	GitHub Actions and Modrinth/CurseForge releases
minecraft-world-generation	Biomes, dimensions, structures, and features
minecraft-resource-pack	Textures, models, sounds, fonts, and shaders
minecraft-imagegen	Pack art, concepts, thumbnails, and UI mockups
minecraft-server-admin	Hosting, tuning, backups, proxies, and operations
minecraft-worldedit-ops	Safe WorldEdit selections, schematics, and brushes
minecraft-essentials-ops	EssentialsX configuration, moderation, and economy

Using GPT-6 Astra and Claude Fable 5.1

These are host-loaded skills, not model-specific API integrations. Select the model in Codex or Claude Code. The bundle does not set model IDs, effort, permissions, or global configuration.

Describe the outcome and target version, for example:

• "Fix this Paper 1.21.11 command without upgrading the server."
• "Add a 26.2 datapack recipe and verify its files."
• "Audit this Velocity configuration; prepare any changes locally."

The agent should inspect the existing project first, load only relevant references, and finish authorized work with focused edits and proportionate checks. Existing version pins and explicit user choices take precedence over example defaults. A layout validator checks selected static rules; it does not establish compilation, in-game behavior, or production readiness.

The September 2026 review follows the official guidance for GPT-6 Astra, Claude Fable 5.1, Codex skills, and Claude Code skills. This is a content and packaging review, not a benchmark of both models or an in-game certification of every example. See the September 2026 audit for all 13 skills, primary sources, corrections, and verification limits.

Maintaining the bundle

Use Node 22 or newer and Bash (Git Bash works on Windows). Edit .agents/skills/, then run:

npm run sync:skills
npm run check

The sync command refreshes .codex/skills/, .claude/skills/, and the plugin bundle. The copied skill directories do not need the repository's Node tooling.

License

MIT