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.
curl -O https://raw.githubusercontent.com/zihin-ai/zihin-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/zihin-ai/zihin-mcpWrote 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/zihin-ai/zihin-mcp/claude-md)<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.
<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>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 | $0.02505 | $0.02505 |
| Opus 5.5 | $0.01002 | $0.01002 |
| Sonnet 5.5 | $0.00501 | $0.00501 |
| Haiku 4.5 | $0.00250 | $0.00250 |
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 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), exportastartProxy(), os classificadores de erro (isAuthError/isConnectionError/isProtocolVersionError/isInputRequiredError/isTimeoutError) eresolveCallTimeoutMs()src/install-skills.js— subcomandoinstall-skills(skills no formato nativo de cada client)bin/zihin-mcp.js— CLI entry point- Usa MCP SDK v2:
Client+StreamableHTTPClientTransport(@modelcontextprotocol/client) eServerlow-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:testnativo - 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
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.
- 23d ago Changed · +14 lines · +796 tokens per session scan A → B 5e5e1ed9e04d
- 1mo ago Changed · +21 lines · +529 tokens per session 44f19917672b
- 1mo ago First seen · 92 lines · 1,180 tokens per session scan A 5565cdc5672c
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.
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.
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).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.