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.
npx agentmods add skills/code-onigiri/mc-modding-skill/basic-knowledgenpx skills add code-onigiri/mc-modding-skill --skill basic-knowledgegit clone --depth 1 https://github.com/code-onigiri/mc-modding-skillWhat 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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00027 | $0.00470 |
| Opus 5 | $0.00014 | $0.00235 |
| Sonnet 5 | $0.00005 | $0.00094 |
| Haiku 4.5 | $0.00003 | $0.00047 |
Grade A, and why
basic-knowledge 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 yesterday.
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.
What it actually says
対応環境
| Version | ModLoader | JDK | 状態 |
|---|---|---|---|
| 1.20.1 | Forge | 17+ | ✅ 対象 |
| 1.21.1 | NeoForge | 21+ | ✅ 対象 |
| 1.17~1.19 | — | — | ⚠️ 参考程度 |
| ~1.12.2 | — | — | ❌ 非対応 |
| 1.21.2~26.x | — | — | ❌ 非対応 |
| Bedrock Edition | — | — | ❌ 対象外 |
Note: 1.21.1の次は26.1となります（バージョン番号が飛びます）。
改造の2要素
- Resource Pack / Data Pack: テクスチャ・モデル・レシピ・ワールド生成など。DataGenでJavaから生成可能。
- Java コード: Block・Item・Entity・Capability など、ゲームロジックの直接実装。
✅ やるべきこと
- 対象バージョン（1.20.1 Forge / 1.21.1 NeoForge）の資料に従う
- DataGen で JSON を生成する（手書きはミスの元）
- Resource Pack / Data Pack の仕様を理解してから書く
- GUI のサイズ・位置は定量的に測る
❌ やってはいけないこと
- 古いバージョン（~1.12.2）のチュートリアルを鵜呑みにする
- Bedrock Edition 向けに Mod を書こうとする
- Data Pack JSON を手書きして構文エラーを出す（DataGen 推奨）
- GUI レイアウトを「目測」で組む
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.
- yesterday First seen · 40 lines · 27 tokens per session scan A 423e9904b763
basic-knowledge is a skill published in the GitHub repository code-onigiri/mc-modding-skill (2 stars, last pushed 2mo ago), licensed MIT. It adds 27 tokens to every session and 470 once invoked, about $0.0001 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 2026-08-31.
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