zihin-mcp: Instructions file for Claude Code

CLAUDE.md

zihin-mcp CLAUDE.md is an instructions file for Claude Code from zihin-ai/zihin-mcp. It costs 2,505 tokens per session, scanned B, original, MIT.

Project instructions for the Zihin MCP server package, a local proxy that connects MCP clients such as Codex or Claude Code to a production server over HTTP.

In plain words
What is it for?
Use them when developing, testing, running, or documenting the @zihin/mcp-server package and its local proxy.
Why use it?
They explain the project structure, commands, authentication, testing requirements, and language and commit conventions in one place.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions .claude-plugin; mentions CLAUDE.md; mentions Claude Code.

This is zihin-ai/zihin-mcp's own configuration. It tells Claude Code how to work on zihin-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 zihin-mcp configures →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is npm run sync-skills # do checkout irmao ../zihin-agent-builder.

Reuse

Borrowing it

Nothing to install: this file belongs to zihin-ai/zihin-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/zihin-ai/zihin-mcp/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/zihin-ai/zihin-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 zihin-mcp CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/zihin-ai/zihin-mcp/claude-md/github.svg)](https://agentmods.dev/instructions/zihin-ai/zihin-mcp/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/zihin-ai/zihin-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/zihin-ai/zihin-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.

agentmods 80×15 button for zihin-mcp CLAUDE.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/zihin-ai/zihin-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/zihin-ai/zihin-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 2,505 This file is loaded in full into every session.
When invoked 2,505 The same file — it is already loaded in full.
Security scan B 1 finding. 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 $0.02505 $0.02505
Opus 5.5 $0.01002 $0.01002
Sonnet 5.5 $0.00501 $0.00501
Haiku 4.5 $0.00250 $0.00250

Measured 23d ago against content hash 5e5e1ed9e04d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

zihin-mcp CLAUDE.md scanned grade B with 1 finding 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 23d 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.

Reads MCP configurationmediumAgent snooping

mcp.json carries server URLs and auth tokens; reading it lets a mod discover and abuse other integrations.

0. Na PREPARACAO da branch de release: `npm run sync-skills`, conferir o diff completo e registrar no PR o commit do BE usado como fonte. O sync e destrutivo (apaga e recria `plugin/skills/`): depois que a branch foi rev
CLAUDE.md · 127 lines

How it starts

The opening of the file, as written. The whole thing — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md — @zihin/mcp-server

O que e este projeto

Pacote npm @zihin/mcp-server — proxy stdio-to-HTTP que conecta clientes MCP (Claude Desktop, Cursor, Claude Code, Codex, Windsurf) ao Zihin MCP Server em producao.

Arquitetura

Cliente MCP <-stdio-> [Proxy local (src/index.js)] <-HTTP-> https://llm.zihin.ai/mcp
  • src/index.js — proxy principal (~670 linhas), exporta startProxy(), os classificadores de erro (isAuthError/isConnectionError/isProtocolVersionError/isInputRequiredError/isTimeoutError) e resolveCallTimeoutMs()
  • src/install-skills.js — subcomando install-skills (skills no formato nativo de cada client)
  • bin/zihin-mcp.js — CLI entry point
  • Usa MCP SDK v2: Client + StreamableHTTPClientTransport (@modelcontextprotocol/client) e Server low-level + StdioServerTransport (@modelcontextprotocol/server)
  • Auth via header X-Api-Key, RBAC enforced server-side

Comandos

# Rodar testes — sem key roda a suite offline; com key roda tambem a integracao (2 chamadas REAIS a chat_with_agent)
npm test
ZIHIN_API_KEY=zhn_live_xxx REQUIRE_INTEGRATION=1 npm test

# Rodar o proxy localmente
ZIHIN_API_KEY=zhn_live_xxx node bin/zihin-mcp.js

# Ressincronizar as skills empacotadas com o BE (passo de release)
npm run sync-skills                              # do checkout irmao ../zihin-agent-builder
ZIHIN_API_KEY=zhn_live_xxx npm run sync-skills -- --from-server

Convencoes

  • Idioma: portugues brasileiro para docs, commits e comentarios
  • Formato de commit: feat(scope): descricao, sem trailer de coautoria
  • Sem emojis
  • JS puro, ESM (type: module), Node.js >= 20 (exigido pelo SDK v2)
  • Zero devDependencies — testes usam node:test nativo
  • Dependencias: @modelcontextprotocol/client + @modelcontextprotocol/server (SDK v2, pacotes divididos)

Estrutura

zihin-mcp/
├── package.json
├── bin/zihin-mcp.js       <- CLI entry point
├── src/index.js           <- Proxy stdio-to-HTTP
├── src/install-skills.js  <- Subcomando install-skills
├── scripts/sync-skills.mjs <- Ressincroniza plugin/skills/ com o BE (release)
├── scripts/registry-publish.sh <- Publica no MCP Registry oficial (apos o latest no npm)
├── scripts/registry-verify.mjs <- Confere nome/versao exatos + isLatest no registry (so leitura)
├── test/proxy.test.js     <- Integracao real contra producao (requer key)
├── test/error-classification.test.js  <- Unit, sem rede
├── test/install-skills.test.js        <- Unit + e2e local, sem rede
├── test/registry-verify.test.js       <- Unit do verificador do registry (fetch injetado, sem rede)
├── test/plugin-manifest.test.js       <- Unit: versoes coerentes (package/server.json/plugin.json/pin do plugin) e README do plugin
├── plugin/                <- Plugin Claude Code (skills empacotadas)
├── .github/workflows/
│   ├── ci.yml             <- Testes OFFLINE em push/PR (sem key — nao queima turnos de agente)
│   └── publish.yml        <- Reexecuta a integracao real (REQUIRE_INTEGRATION=1) em tag v*, DEPOIS do publish manual — nao e o gate; publish e no-op se a versao ja esta no npm
├── README.md
├── CHANGELOG.md
├── LICENSE (MIT)
├── .gitignore
└── .npmignore

Read the full file on GitHub · 127 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.

  1. 23d ago Changed · +14 lines · +796 tokens per session scan A → B 5e5e1ed9e04d
  2. 1mo ago Changed · +21 lines · +529 tokens per session 44f19917672b
  3. 1mo ago First seen · 92 lines · 1,180 tokens per session scan A 5565cdc5672c

Subscribe to this mod's changes

zihin-mcp CLAUDE.md is an instructions file published in the GitHub repository zihin-ai/zihin-mcp (0 stars, last pushed 23d ago), licensed MIT. It adds 2,505 tokens to every session, about $0.0100 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads mcp configuration). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Related

Other instructions, from other repositories