Borrowing it
Nothing to install: this file belongs to reearth/reearth-cms-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/reearth/reearth-cms-mcp/main/AGENTS.mdgit clone --depth 1 https://github.com/reearth/reearth-cms-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/reearth/reearth-cms-mcp/agents-md)<a href="https://agentmods.dev/instructions/reearth/reearth-cms-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/reearth/reearth-cms-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/reearth/reearth-cms-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/reearth/reearth-cms-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 | $0.00796 | $0.00796 |
| Opus 5 | $0.00398 | $0.00398 |
| Sonnet 5 | $0.00159 | $0.00159 |
| Haiku 4.5 | $0.00080 | $0.00080 |
Grade A, and why
reearth-cms-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 10d 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 — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Re:Earth CMS MCP Server
A Model Context Protocol (MCP) server for Re:Earth CMS API, built with Go.
Project Structure
.
├── main.go # Entry point, tool registration
├── internal # Internal application code
├── .github/workflows/ # GitHub Actions workflows
└── .goreleaser.yaml # GoReleaser configuration
How to Build
Requirements
- Go 1.25+
Build
go build .
Build with Version
go build -ldflags "-X github.com/reearth/reearth-cms-mcp/internal/version.Version=v1.0.0" .
How to Run
Environment Variables
| Variable | Required | Description |
|---|---|---|
REEARTH_CMS_TOKEN |
Yes | API token for authentication |
REEARTH_CMS_WORKSPACE_ID |
Yes | Workspace ID to operate on |
REEARTH_CMS_BASE_URL |
No | Base URL (default: https://api.cms.reearth.io/api) |
Available Tools
| Tool | Description |
|---|---|
comment_to_asset |
Add a comment to an asset |
comment_to_item |
Add a comment to an item |
create_item |
Create a new item |
delete_item |
Delete an item |
get_asset |
Get a specific asset by ID |
get_item |
Get a specific item by ID |
get_model |
Get a specific model by ID |
list_items |
List items in a model |
list_models |
List all models in a project |
update_item |
Update an existing item |
Best Practices Summary
Development Guidelines
- Write idiomatic Go code following standard conventions and patterns
- Use interface-driven development with explicit dependency injection
- Prefer composition over inheritance with small, purpose-specific interfaces
- Write short, focused functions with single responsibility
- Handle errors explicitly using wrapped errors for traceability
- Avoid global state and use constructor functions for dependency injection
- Sort functions, methods, tools and types alphabetically for easier navigation
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.
- 10d ago First seen · 101 lines · 796 tokens per session scan A c17633dd833f
reearth-cms-mcp AGENTS.md is an instructions file published in the GitHub repository reearth/reearth-cms-mcp (2 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 796 tokens to every session, about $0.0040 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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