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minecraft-agent-skills: Skill for Claude Code

.agents/skills/minecraft-world-generation/SKILL.md

minecraft-world-generation is a skill for Claude Code, Codex from Jahrome907/minecraft-agent-skills. It costs 57 tokens per session (2,616 once invoked), scanned A, original, MIT.

A guide for creating and debugging Minecraft world-generation data and code. It covers biomes, dimensions, terrain features, structures, and related settings for datapacks, NeoForge, and Fabric.

In plain words
What is it for?
Use it to add or register biomes, dimensions, ores, structures, terrain features, and changes to existing biomes in Minecraft 26.x or 1.21.x.
Why use it?
It helps you choose the right format and platform when changing how Minecraft worlds are created. It also keeps world-generation work separate from general gameplay or datapack features.

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 26d 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-world-generation/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/Jahrome907/minecraft-agent-skills

Made for: Claude Code, Codex.

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README.md
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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.

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Your own site · 80×15
<a href="https://agentmods.dev/skills/jahrome907/minecraft-agent-skills/minecraft-world-generation"><img src="https://agentmods.dev/badge/skills/jahrome907/minecraft-agent-skills/minecraft-world-generation.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 2,616 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 $0.02616
Opus 5.5 $0.00023 $0.01046
Sonnet 5.5 $0.00011 $0.00523
Haiku 4.5 $0.00006 $0.00262

Measured 26d ago against content hash df0dbe4a0e15, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

minecraft-world-generation 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 26d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/jq-shim.mjs, scripts/validate-worldgen-json.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-world-generation/SKILL.md · 253 lines

How it starts

The opening of the file, as written. The whole thing — 253 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Minecraft World Generation

Use this skill for biome, dimension, feature, or structure data and their registration. Use minecraft-datapack for non-worldgen data and minecraft-modding for non-worldgen gameplay code.

Routing Boundaries

  • Use when: the task changes worldgen data, registration, or injection.
  • Do not use when: the task is non-worldgen datapack work (minecraft-datapack).
  • Do not use when: the task is non-worldgen mod systems (minecraft-modding).

Choose the delivery path

Approach Best When Platform
Datapack JSON Change data supplied by a pack Vanilla, any server
Mod + Datagen Registering new biomes/dimensions, code-driven NeoForge / Fabric
Biome Modifier (NeoForge) Adding features/spawns to existing biomes NeoForge
BiomeModification API (Fabric) Adding features/spawns to existing biomes Fabric

Worldgen registries are datapack registries: their files load at world load and their registry path determines the data path. Read the NeoForge registry guide before choosing a mod-specific registry path.

Version boundary

Use Minecraft 26.x for new work. Use Java 25 and start each JSON schema from the exact target's vanilla data or generated output. Do not copy a 1.21 shape into a 26.x pack merely because it parses as JSON.

Preserve an established 1.21.x project on Java 21 and its matching schema unless the task explicitly includes an upgrade. Keep examples matched to the project version.

The 26.1 migration primer removes minecraft:random_patch and minecraft:no_bonemeal_flower. It replaces the random-patch pattern with a separate minecraft:simple_block configured feature and placements for count, random offset, and block-predicate filtering. Inspect the relevant primer section before migrating code or data.

Read legacy 1.21 JSON patterns only when the project targets that version. Those examples are not release artifacts for 26.x.

Read the full file on GitHub · 253 lines

Files

What ships with it

3 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. 26d ago Changed · +3 lines df0dbe4a0e15
  2. 1mo ago Changed 290606dd82b6
  3. 2mo ago Changed · -342 lines · +1 tokens per session ef70119fe79c
  4. 2mo ago First seen · 592 lines · 56 tokens per session scan A 0009066bb173

Subscribe to this mod's changes

minecraft-world-generation 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 2,616 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.

Game developmentcodexfabricminecraftminecraft-datapackminecraft-moddingminecraft-plugin
Related

minecraft-world-generation compared with skills from other repositories

minecraft-world-generation next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
minecraft-world-generationJahrome907/minecraft-agent-skillsSkill1978d agoMITA57Claude Code, Codex
minecraft-modpack-serverNousResearch/hermes-agentSkill261kyesterdayMITB19Claude Code, Codex
mc-script-apiguguzea/MC-AI-Coding-Assistant-ToolSkill132yesterdaynoneA23Claude Code, Codex
mc-addon-manifestguguzea/MC-AI-Coding-Assistant-ToolSkill132yesterdaynoneA27Claude Code, Codex
mc-addon-setupguguzea/MC-AI-Coding-Assistant-ToolSkill132yesterdaynoneA35Claude Code, Codex
mc-bedrock-block-itemguguzea/MC-AI-Coding-Assistant-ToolSkill132yesterdaynoneA30Claude Code, Codex
mc-bedrock-entityguguzea/MC-AI-Coding-Assistant-ToolSkill132yesterdaynoneA28Claude Code, Codex