What is mcp-nexus CLAUDE.md?

A Claude Code instruction file for the mcp-nexus project that defines when to read its OpenSpec guidance for plans, proposals, major changes, or unclear requests.

It helps prepare and apply change proposals and follow the project's OpenSpec conventions when planning or modifying the system.

It directs the coding agent to the project's authoritative rules before making architectural or other significant changes.

How ykq007/mcp-nexus configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to ykq007/mcp-nexus. 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/ykq007/mcp-nexus/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/ykq007/mcp-nexus

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/ykq007/mcp-nexus/claude-md/github.svg)](https://agentmods.dev/instructions/ykq007/mcp-nexus/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/ykq007/mcp-nexus/claude-md"><img src="https://agentmods.dev/badge/instructions/ykq007/mcp-nexus/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/ykq007/mcp-nexus/claude-md"><img src="https://agentmods.dev/badge/instructions/ykq007/mcp-nexus/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 28 This file is loaded in full into every session.

When invoked 28 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 100% copy Near-identical to another mod 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	$0.00028	$0.00028
Opus 5.5	$0.00011	$0.00011
Sonnet 5.5	$0.00006	$0.00006
Haiku 4.5	$0.00003	$0.00003

Measured 2mo ago against content hash 649485a3f147, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcp-nexus 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.

Origin

This is a copy

100% identical to 1code AGENTS.md — 19 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

CLAUDE.md · 3 lines

What it actually says

Claude instructions

Read and follow AGENTS.md at the repository root. It is the canonical agent instruction file for this repository.

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 Changed · -15 lines · -115 tokens per session 649485a3f147
2mo ago First seen · 18 lines · 143 tokens per session scan A 989371119443

Subscribe to this mod's changes

mcp-nexus CLAUDE.md is an instructions file published in the GitHub repository ykq007/mcp-nexus (21 stars, last pushed 2mo ago), licensed MIT. It adds 28 tokens to every session, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to 1code AGENTS.md, differing in 19 lines, and is treated as a copy.

mcp-nexus CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
mcp-nexus CLAUDE.mdykq007/mcp-nexus	Instructions file	21	2mo ago	MIT	A	28	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

mcp-nexus: Instructions file for Claude Code