What is ytt-mcp CLAUDE.md?

A project instruction file for ytt-mcp, a Python codebase, covering package management, coding style, documentation, testing, and commit requirements.

It guides dependency changes with uv, type annotations, docstrings, small functions, formatting, tests for new features and fixes, and required commit trailers.

It prevents inconsistent tooling and code by defining the commands and rules contributors must follow.

How cottongeeks/ytt-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to cottongeeks/ytt-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/cottongeeks/ytt-mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/cottongeeks/ytt-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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/cottongeeks/ytt-mcp/claude-md/github.svg)](https://agentmods.dev/instructions/cottongeeks/ytt-mcp/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/cottongeeks/ytt-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/cottongeeks/ytt-mcp/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/cottongeeks/ytt-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/cottongeeks/ytt-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 532 This file is loaded in full into every session.

When invoked 532 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.

Model	Per session	Once invoked
Fable 5.1	$0.00532	$0.00532
Opus 5.5	$0.00213	$0.00213
Sonnet 5.5	$0.00106	$0.00106
Haiku 4.5	$0.00053	$0.00053

Measured 2mo ago against content hash 04bd002ff2d4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ytt-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 · 79 lines

How it starts

The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Development Guidelines

This document contains critical information about working with this codebase. Follow these guidelines precisely.

Core Development Rules

Package Management
- ONLY use uv, NEVER pip
- Installation: uv add package
- Running tools: uv run tool
- Upgrading: uv add --dev package --upgrade-package package
- FORBIDDEN: uv pip install, @latest syntax
Code Quality
- Type hints required for all code
- Public APIs must have docstrings
- Functions must be focused and small
- Follow existing patterns exactly
- Line length: 88 chars maximum
Testing Requirements
- Framework: uv run --frozen pytest
- Async testing: use asyncio
- Coverage: test edge cases and errors
- New features require tests
- Bug fixes require regression tests

For commits fixing bugs or adding features based on user reports add:
```
git commit --trailer "Reported-by:<name>"
```
Where <name> is the name of the user.

For commits related to a Github issue, add

git commit --trailer "Github-Issue:#<number>"

NEVER ever mention a co-authored-by or similar aspects. In particular, never mention the tool used to create the commit message or PR.

Python Tools

Code Formatting

Ruff
- Format: uv run --frozen ruff format .
- Check: uv run --frozen ruff check .
- Fix: uv run --frozen ruff check . --fix
- Critical issues:
  - Line length (88 chars)
  - Import sorting (I001)
  - Unused imports
- Line wrapping:
  - Strings: use parentheses
  - Function calls: multi-line with proper indent
  - Imports: split into multiple lines

Error Resolution

Common Issues
- Line length:
  - Break strings with parentheses
  - Multi-line function calls
  - Split imports
- Types:
  - Add None checks
  - Narrow string types
  - Match existing patterns
- Pytest
  - we use automatic detection of async defs
Best Practices
- Check git status before commits
- Run formatters before type checks
- Keep changes minimal
- Follow existing patterns
- Document public APIs
- Test thoroughly

Read the full file on GitHub · 79 lines

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.

2mo ago First seen · 79 lines · 532 tokens per session scan A 04bd002ff2d4

Subscribe to this mod's changes

ytt-mcp CLAUDE.md is an instructions file published in the GitHub repository cottongeeks/ytt-mcp (74 stars, last pushed 1y ago), licensed MIT. It adds 532 tokens to every session, about $0.0021 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.

claude-desktop mcp mcp-server raycast transcript youtube

ytt-mcp CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
ytt-mcp CLAUDE.mdcottongeeks/ytt-mcp	Instructions file	74	1y ago	MIT	A	532	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,516	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
vscode model-prompts.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	2,022	GitHub Copilot

ytt-mcp: Instructions file for Claude Code