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 agentmods add instructions/nbialk/chess-mcp/agents-mdgit clone --depth 1 https://github.com/nbialk/chess-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/nbialk/chess-mcp/agents-md)<a href="https://agentmods.dev/instructions/nbialk/chess-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/nbialk/chess-mcp/agents-md.svg" alt="Measured on agentmods" 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 | $0.00491 | $0.00491 |
| Opus 5 | $0.00246 | $0.00246 |
| Sonnet 5 | $0.00098 | $0.00098 |
| Haiku 4.5 | $0.00049 | $0.00049 |
Grade A, and why
chess-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 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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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.
- 4d ago First seen · 42 lines · 491 tokens per session scan A f7a2cbb3b289
chess-mcp AGENTS.md is an instructions file published in the GitHub repository nbialk/chess-mcp (2 stars, last pushed 20d ago), with no licence file. It adds 491 tokens to every session, about $0.0025 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.
Other instructions, from other repositories
skybridge AGENTS.md
AGENTS.md instructions for alpic-ai/skybridge, covering agents guide, what is skybridge, monorepo layout, development and validation.
mobile CLAUDE.md
Claude Code instructions for lichess-org/mobile, covering claude.md, project overview, development setup, initial setup and install dependencies.
cc65-Chess AGENTS.md
Instructions for StewBC/cc65-Chess, covering working on cc65 chess, hard constraints, code style, traps that have already caught someone and building and testing.
mcp-app-typescript-template AGENTS.md
AGENTS.md instructions for pomerium/mcp-app-typescript-template, covering repository guidelines, project overview, development commands, quick start and all available commands.
mcp-signal CLAUDE.md
Instructions for Roee-Tsur/mcp-signal, covering claude.md, what this is, commands, architecture — destinations × transports, one contract and entry points — keep them separate.
apps-sdk-template AGENTS.md
AGENTS.md instructions for alpic-ai/apps-sdk-template: This is a ChatGPT/MCP app built with Skybridge. ALWAYS use the chatgpt-app-builder skill when planning or updating the codebase.