Borrowing it
Nothing to install: this file belongs to hlebtkachenko/spaceship-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/hlebtkachenko/spaceship-mcp/main/AGENTS.mdgit clone --depth 1 https://github.com/hlebtkachenko/spaceship-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/hlebtkachenko/spaceship-mcp/agents-md)<a href="https://agentmods.dev/instructions/hlebtkachenko/spaceship-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/hlebtkachenko/spaceship-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/hlebtkachenko/spaceship-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/hlebtkachenko/spaceship-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 | $0.00336 | $0.00336 |
| Opus 5.5 | $0.00134 | $0.00134 |
| Sonnet 5.5 | $0.00067 | $0.00067 |
| Haiku 4.5 | $0.00034 | $0.00034 |
Grade A, and why
spaceship-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 22d 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.
What it actually says
AGENTS.md
MCP server for the Spaceship domain registrar API (domains, DNS, contacts, transfers, SellerHub). TypeScript, Node 22+, stdio transport. Layout and design: ARCHITECTURE.md.
Commands
npm ci
npm run build # tsc -> dist/
npm test # build + node:test suite (fake Spaceship API, no credentials)
npm run check:contract # validate every tool's request and the fake API's responses against the Spaceship OpenAPI spec
Rules
- Any change to a request a tool sends must pass
npm run check:contract. Look up field names in the spec (.spec-cache/spaceship-openapi.jsonafter the first run), not in memory. - Every tool has MCP annotations. Tools that spend money or delete take
confirm: CONFIRM(src/utils.ts). - Never auto-retry POST/PATCH on timeout or network error: the client reports "outcome unknown" instead. Keep it that way.
- Canned responses in
test/helpers.mjsmust follow the spec's response schemas;check:contractvalidates them. - New tools: register in
src/index.ts, add a request case totest/tools.test.mjsand a row to the README tools table (a test checks the README against the registered tools). - Synthetic data only in tests and docs:
example.com,192.0.2.x, placeholder contact IDs. Never commit credentials; configuration is env-only. - No live API calls in tests or scripts.
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.
- 22d ago First seen · 23 lines · 336 tokens per session scan A a2dfd908cece
spaceship-mcp AGENTS.md is an instructions file published in the GitHub repository hlebtkachenko/spaceship-mcp (2 stars, last pushed 23d ago), licensed MIT. It adds 336 tokens to every session, about $0.0013 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 2026-10-08.
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