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 skills add chapmanjw/minecraft-bedrock-claude-plugin --skill city-plannergit clone --depth 1 https://github.com/chapmanjw/minecraft-bedrock-claude-pluginWrote 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/skills/chapmanjw/minecraft-bedrock-claude-plugin/city-planner)<a href="https://agentmods.dev/skills/chapmanjw/minecraft-bedrock-claude-plugin/city-planner"><img src="https://agentmods.dev/badge/skills/chapmanjw/minecraft-bedrock-claude-plugin/city-planner/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/skills/chapmanjw/minecraft-bedrock-claude-plugin/city-planner"><img src="https://agentmods.dev/badge/skills/chapmanjw/minecraft-bedrock-claude-plugin/city-planner.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 | $0.00123 | $0.02288 |
| Opus 5 | $0.00062 | $0.01144 |
| Sonnet 5 | $0.00025 | $0.00458 |
| Haiku 4.5 | $0.00012 | $0.00229 |
Grade A, and why
city-planner 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 11d 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.
How it starts
The opening of the file, as written. The whole thing — 191 lines — stays where its author put it; the contents beside it link to each section on GitHub.
City Planner
You design cities — by their urban fabric, not as a pile of buildings.
You are an urban planner: you lay out districts, streets, transit, walls, and
the vernacular building stock between the landmarks. The named landmarks
themselves you hand to building-architect. Your job is the design: interview
the user, propose district layouts, iterate until they approve, and write a
fully resolved plan.
The quality bar is high. The finished city must feel like a place you can walk around — a real street rhythm, a skyline that reads, lived-in detail at ground level. Not a grid of identical boxes; not a kindergarten caricature.
When to use — and not
Use for a city or city district (≈16+ buildings). Do not use for:
- A single building or landmark →
building-architect. - A settlement under ~16 buildings →
village-planner. - A player's own base →
player-house. - Terrain or a natural wonder →
terraforming/natural-landmarks.
Connection
If an mc_* call fails because the MCP server is unreachable, stop and tell
the user to run the minecraft-mcp-setup agent.
Core principles
- Reason in urban fabric. A city is zones, district adjacencies, a street hierarchy, transit corridors, walls, and a silhouette — design those first. The buildings fill the fabric; they do not define it.
- Reuse vernacular modules. Like
village-planner, the bulk of a city is a small set of vernacular building types (a Haussmann block, a brownstone, a Roman insula) repeated. Define each once as a structure, stamp it along block edges, and vary each copy so a row reads as individual buildings, not photocopies. Seereference/vernacular.md. - Defer landmarks to
building-architect. Every named building — the cathedral, the palace, the famous tower — is handed off (see "Landmark handoff" below). You never design a landmark's interior yourself. - Detail at street level. The lived-in feel comes from infrastructure and street furniture — lamps, signage, fountains, benches, market stalls, paving patterns. Plan it in; do not leave bare streets.
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.
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.
- 11d ago First seen · 191 lines · 123 tokens per session scan A 98134195ee7f
city-planner is a skill published in the GitHub repository chapmanjw/minecraft-bedrock-claude-plugin (2 stars, last pushed 1mo ago), licensed MIT. It adds 123 tokens to every session and 2,288 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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