Borrowing it
Nothing to install: this file belongs to MCDxAI/minecraft-dev-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/MCDxAI/minecraft-dev-mcp/main/AGENTS.mdgit clone --depth 1 https://github.com/MCDxAI/minecraft-dev-mcpWrote 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.
[](https://agentmods.dev/instructions/mcdxai/minecraft-dev-mcp/agents-md)<a href="https://agentmods.dev/instructions/mcdxai/minecraft-dev-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/mcdxai/minecraft-dev-mcp/agents-md/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.
<a href="https://agentmods.dev/instructions/mcdxai/minecraft-dev-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/mcdxai/minecraft-dev-mcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.01231 | $0.01231 |
| Opus 5.5 | $0.00492 | $0.00492 |
| Sonnet 5.5 | $0.00246 | $0.00246 |
| Haiku 4.5 | $0.00123 | $0.00123 |
Grade A, and why
minecraft-dev-mcp AGENTS.md 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.
How it starts
The opening of the file, as written. The whole thing — 55 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENT HANDBOOK – Minecraft Dev MCP
Reference for AI/agent operators working in this repo. Grounded in CLAUDE.md and current project state.
Project Snapshot
- MCP server that lets agents decompile, remap, search, and analyze Minecraft (1.14+; obfuscated through 1.21.11).
- Phase 1 & 2 complete (core + advanced tools); 29 integration tests green as of 2025-12-06.
- Phase 3 focus: third-party mod analysis; missing piece is decompiling remapped mod JARs (see TODO).
- Stack: Node 18+/ESM-only (
"type": "module"), TS 5.7, Java 17+ (21+ for newest MC), better-sqlite3, VineFlower decompiler, tiny-remapper.
What Agents Should Prioritize
- Keep ESM intact: no CommonJS, ensure
.jsextensions on local imports after build. - Registry extraction must use the obfuscated server JAR with version-aware bundler flag; never the client JAR.
- Yarn remapping is two-step: official → intermediary → yarn; do not collapse into one pass.
- Respect cache layout in platform app data (
jars/,mappings/,remapped/,decompiled/{version}/{mapping}/,registry/{version}/,resources/,search-index/,cache.db). - VineFlower drops
libraries/,versions/,logs/in CWD during runs; temporary and gitignored.
Architecture Wayfinder (src/)
services/:version-manager(JARs),mapping-service(Yarn/Mojmap/Intermediary),remap-service(two-step Yarn),decompile-service(VineFlower),registry-service(data generator on server JAR),source-service(pipeline orchestrator).java/:tiny-remapper,vineflower,mc-data-gen(bundler vs legacy invocation),java-process(exec wrapper).downloaders/: Mojang assets/mappings, Yarn mappings, Java tool JARs.cache/: cache manager + SQLite metadata DB.utils/paths.ts: resolves OS-specific cache roots.
Available MCP Tools (for LLM surfaces)
- Phase 1 core:
get_minecraft_source,decompile_minecraft_version,list_minecraft_versions,get_registry_data. - Phase 2 analysis:
remap_mod_jar,find_mapping,search_minecraft_code,compare_versions,analyze_mixin,validate_access_widener,validate_access_transformer,compare_versions_detailed,index_minecraft_version,search_indexed,get_documentation,search_documentation. - Phase 3:
analyze_mod_jar(metadata/mixins/bytecode scan). Missing: decompile remapped mod JARs. - Phase 4 (Forge/NeoForge patched source, mojmap-only):
list_forge_versions,decompile_forge_minecraft_version,get_forge_source,search_forge_code,compare_vanilla_vs_forge. Wraps NeoFormRuntime (auto-downloaded); patched tree lives under the same opaque<mc>-<loader>-<loaderVersion>key the vanilla tools already accept.
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 Changed · +1 lines · +86 tokens per session 1f17cba35ce1
- 1mo ago First seen · 54 lines · 1,145 tokens per session scan A a6a3c32cecd5
minecraft-dev-mcp AGENTS.md is an instructions file published in the GitHub repository MCDxAI/minecraft-dev-mcp (47 stars, last pushed yesterday), licensed MIT. It adds 1,231 tokens to every session, about $0.0049 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.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.