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yahoo_fantasy_mcp: Instructions file for Claude Code

CLAUDE.md

yahoo_fantasy_mcp CLAUDE.md is an instructions file for Claude Code from spilchen/yahoo_fantasy_mcp. It costs 19 tokens per session, scanned A, original, MIT.

Project instructions for an MCP server, a program that lets an AI assistant use external tools, for Yahoo Fantasy League data. The Yahoo league ID is read from environment settings or project configuration.

In plain words
What is it for?
Working on the spilchen/yahoo_fantasy_mcp project and configuring its Yahoo Fantasy League connection.
Why use it?
They tell the coding agent where to find the league it should work with.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md.

This is spilchen/yahoo_fantasy_mcp's own configuration. It tells Claude Code how to work on yahoo_fantasy_mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything yahoo_fantasy_mcp configures →

not rated 6repo 8mo ago A scan 19 tokens original MIT
View source ↗ spilchen/yahoo_fantasy_mcp
Reuse

Borrowing it

Nothing to install: this file belongs to spilchen/yahoo_fantasy_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.

Copy the file
curl -O https://raw.githubusercontent.com/spilchen/yahoo_fantasy_mcp/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/spilchen/yahoo_fantasy_mcp

Made for: Claude Code.

Wrote 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.

agentmods badge for yahoo_fantasy_mcp CLAUDE.md

README.md
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Your own site
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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.

agentmods 80×15 button for yahoo_fantasy_mcp CLAUDE.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/spilchen/yahoo_fantasy_mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/spilchen/yahoo_fantasy_mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 19 This file is loaded in full into every session.
When invoked 19 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00019 $0.00019
Opus 5.5 $0.00008 $0.00008
Sonnet 5.5 $0.00004 $0.00004
Haiku 4.5 $0.00002 $0.00002

Measured 2mo ago against content hash bb83936e3127, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

yahoo_fantasy_mcp 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 2mo 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.

CLAUDE.md · 2 lines

What it actually says

  • Get the league ID from the environment variables, .mcp.json or .envrc
Changes

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.

  1. 2mo ago First seen · 2 lines · 19 tokens per session scan A bb83936e3127

Subscribe to this mod's changes

yahoo_fantasy_mcp CLAUDE.md is an instructions file published in the GitHub repository spilchen/yahoo_fantasy_mcp (6 stars, last pushed 8mo ago), licensed MIT. It adds 19 tokens to every session, about $0.0001 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 2026-08-31.

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