system-transit

system-transit is a skill for Claude Code, Codex from chapmanjw/minecraft-java-fabric-claude-plugin. It costs 110 tokens per session (2,483 once invoked), scanned A, original, MIT.

A design tool for connecting separate locations in a Minecraft Java world with transport routes and infrastructure.

In plain words
What is it for?
Use it to plan railways, roads, Nether hubs, bridges, tunnels, elevators, docks, and airports between sites.
Why use it?
It helps decide how different bases, villages, and landmarks should connect instead of planning each route in isolation.

Skill for Claude CodeCodex

Installs and runs on its own, but its text points at files inside its plugin — anything it tells you to read at a ${CLAUDE_PLUGIN_ROOT} path is only there once the plugin is installed. Installing the plugin gets both.

Part of the minecraft-java plugin — 28 skills, 2 agents shipped together

Install

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.

agentmods
npx agentmods add skills/chapmanjw/minecraft-java-fabric-claude-plugin/system-transit
Any agent
npx skills add chapmanjw/minecraft-java-fabric-claude-plugin --skill system-transit
Clone the repo
git clone --depth 1 https://github.com/chapmanjw/minecraft-java-fabric-claude-plugin

Made for: Claude Code, Codex.

Or install minecraft-java, the plugin that ships this one along with the rest of its 28 skills, 2 agents.

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 system-transit

README.md
[![agentmods](https://agentmods.dev/badge/skills/chapmanjw/minecraft-java-fabric-claude-plugin/system-transit.svg)](https://agentmods.dev/skills/chapmanjw/minecraft-java-fabric-claude-plugin/system-transit)
Your own site
<a href="https://agentmods.dev/skills/chapmanjw/minecraft-java-fabric-claude-plugin/system-transit"><img src="https://agentmods.dev/badge/skills/chapmanjw/minecraft-java-fabric-claude-plugin/system-transit.svg" alt="Measured on agentmods" height="20"></a>
Per session 110 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,483 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00110 $0.02483
Opus 5 $0.00055 $0.01241
Sonnet 5 $0.00022 $0.00497
Haiku 4.5 $0.00011 $0.00248

Measured 4d ago against content hash c5de3399b310, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

system-transit 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 4d ago.

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.

skills/system-transit/SKILL.md · 192 lines

How it starts

The opening of the file, as written. The whole thing — 192 lines — stays where its author put it; the contents beside it link to each section on GitHub.

system-transit (Transit Architect)

You design the connective network between builds — how a player gets from one base, village, or landmark to another. Your output is a transit network: a topology, routed links, and the blueprints for every rail, road, nether tunnel, bridge, and dock in it. Your job is the design: interview the user, choose the topology, route the links, propose blueprints, iterate, and write a fully resolved plan.

When to use — and not

Use when two or more sites need to be linked — a transit network, a nether hub, a highway, a rail line, a bridge or tunnel between places. Do not use for:

  • Streets inside a single city or districtdesign-city owns those. You connect cities; design-city connects buildings.
  • A single building (a station hall, a terminal) → design-building.
  • Naturalistic terrain or a path through wild scenery with no network → terrain-shape shapes the land; a designed garden path → design-grounds.

Connection

If a tool call fails because the MCP server is unreachable, stop and tell the user to run the minecraft-mcp-setup agent.

Core competency

Two things are distinctively yours:

  1. Topology choice — given a set of sites, decide the shape of the network: a direct line, a mesh, a hub-and-spoke, a ring, a trunk-and-branch, or a nether hub. The wrong topology wastes enormous effort. See reference/topology.md.
  2. Route-finding under Java constraints — trace each link across real terrain, around protected builds and landmarks, choosing the cheapest credible path and the right transport mode for the distance.

You design static infrastructure only — rails, roadbed, tunnels, bridges, the static parts of elevators and docks. Anything that needs redstone (a boost station, an automated junction switch, a drawbridge mechanism, a bubble-elevator activator) goes to system-redstone — flag it and return it to the orchestrator, which sequences that leaf.

Java realities

Read the full file on GitHub · 192 lines

Files

What ships with it

7 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. 4d ago First seen · 192 lines · 110 tokens per session scan A c5de3399b310

Subscribe to this mod's changes

system-transit is a skill published in the GitHub repository chapmanjw/minecraft-java-fabric-claude-plugin (6 stars, last pushed 7d ago), licensed MIT. It adds 110 tokens to every session and 2,483 once invoked, about $0.0006 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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