Borrowing it
Nothing to install: this file belongs to j4th/mtg-mcp-server. 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/j4th/mtg-mcp-server/main/CLAUDE.mdgit clone --depth 1 https://github.com/j4th/mtg-mcp-serverWrote 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/j4th/mtg-mcp-server/claude-md)<a href="https://agentmods.dev/instructions/j4th/mtg-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/j4th/mtg-mcp-server/claude-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/j4th/mtg-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/j4th/mtg-mcp-server/claude-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 | $0.00386 | $0.00386 |
| Opus 5.5 | $0.00154 | $0.00154 |
| Sonnet 5.5 | $0.00077 | $0.00077 |
| Haiku 4.5 | $0.00039 | $0.00039 |
Grade A, and why
mtg-mcp-server CLAUDE.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 3d 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
MTG MCP Server — Claude Code entry point
Single source of truth for agent instructions is AGENTS.md. This file imports it so Claude Code reads the same rules as every other agent. Do not duplicate content here — edit AGENTS.md.
@AGENTS.md
Claude Code specifics (not portable to other harnesses)
- Skills, hooks, and agents for Claude Code live in
.claude/(the pi equivalents are.pi/and.agents/). The.claude/tree is kept for the Claude Code subscription and is intentionally untouched by other agents. - smoke-test checklist path for Claude sessions:
.claude/skills/smoke-test/SKILL.md(pi uses.agents/skills/smoke-test/SKILL.md). - Worktree agent workflow: commit all changes and verify you're on the correct feature branch before launching agents — they branch from the last COMMITTED state of the CURRENT branch. Never blindly
cpfiles out of a worktree over scaffolded files (agents rewrite entire files — diff first). Cherry-pick agent commits back, thengit diff <prior-commit>..HEAD -- <shared-files>to catch silent clobbers. - Cancel stale CI runs on the branch before pushing new commits.
- Dispatch hierarchy: parallel agents (independent file domains) → subagent-driven development (sequential tasks needing review gates) → sequential only when tightly coupled.
PR workflow (Claude review bot)
- Create PRs as drafts (
gh pr create --draft) — automated review triggers onready_for_review, notopened. - Fetch comments via
gh api /repos/{owner}/{repo}/pulls/{number}/comments, reply via.../comments/{id}/replies, fix, runmise run check, commit referencing the PR, push, resolve threads via GraphQLresolveReviewThread.
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.
- 3d ago Changed · -167 lines · -3,330 tokens per session 314451524199
- 1mo ago First seen · 186 lines · 3,716 tokens per session scan A 544a09d0aee3
mtg-mcp-server CLAUDE.md is an instructions file published in the GitHub repository j4th/mtg-mcp-server (20 stars, last pushed 2d ago), licensed MIT. It adds 386 tokens to every session, about $0.0015 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 2026-08-30.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).