whatsapp-web-mcp: Instructions file for Codex

AGENTS.md

whatsapp-web-mcp AGENTS.md is an instructions file for Codex, OpenCode from KingDonRush/whatsapp-web-mcp. It costs 1,262 tokens per session, scanned A, original, MIT.

Instructions for an agent working with WhatsApp Web through an MCP server, a program that exposes messaging tools. They define how to read chats and prepare or confirm actions without exposing browser details.

In plain words
What is it for?
Use them to check WhatsApp status, list chats, read messages, retrieve media, export chats, transcribe files, and prepare, confirm, or check the status of actions.
Why use it?
They keep the agent focused on messages and chats instead of browser controls, and help prevent accidental sending during read operations. They also require checking login status and resolving unclear chats safely.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md.

This is KingDonRush/whatsapp-web-mcp's own configuration. It tells Codex and OpenCode how to work on whatsapp-web-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 whatsapp-web-mcp configures →

Reuse

Borrowing it

Nothing to install: this file belongs to KingDonRush/whatsapp-web-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/KingDonRush/whatsapp-web-mcp/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/KingDonRush/whatsapp-web-mcp

Made for: Codex, OpenCode.

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Per session 1,262 This file is loaded in full into every session.
When invoked 1,262 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 $0.01262 $0.01262
Opus 5.5 $0.00505 $0.00505
Sonnet 5.5 $0.00252 $0.00252
Haiku 4.5 $0.00126 $0.00126

Measured 1mo ago against content hash 57700820222b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

whatsapp-web-mcp AGENTS.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 1mo 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.

AGENTS.md · 116 lines

How it starts

The opening of the file, as written. The whole thing — 116 lines — stays where its author put it; the contents beside it link to each section on GitHub.

WhatsApp MCP Agent Instructions

Public API v1

Use somente:

  • whatsapp_status
  • whatsapp_list_chats
  • whatsapp_find
  • whatsapp_get_contact
  • whatsapp_get_chat_info
  • whatsapp_get_message
  • whatsapp_get_messages
  • whatsapp_get_chat
  • whatsapp_get_media
  • whatsapp_understand
  • whatsapp_send_message
  • whatsapp_jobs
  • whatsapp_settings

Todas as chamadas recebem um objeto request tipado. Não use ferramentas antigas, aliases, Playwright externo, DOM, SQLite, IndexedDB, WasIstLos, ZapZap, MyZap ou automação de browser para compensar falha de domínio.

Domain Contract

  1. Peça dados de domínio: chats, contatos, mensagens, mídia, entendimento, jobs, settings ou envio. O MCP resolve OpenWA, histórico, artefatos, transcrição e confirmação internamente.
  2. Não faça preflight com whatsapp_status antes de uma leitura comum. Chame a ferramenta da intenção; se ela retornar login_required, execute whatsapp-web-mcp auth --profile default quando houver shell local e diga apenas que o navegador foi aberto para o QR. Use status para diagnóstico.
  3. Nunca cole, anexe, descreva ou reconstrua QR Code no chat.
  4. Use whatsapp_list_chats para descobrir um chat. Quando o chat já for conhecido, vá direto a whatsapp_get_messages; não use busca global. whatsapp_find é para identidade ou conteúdo sem chat conhecido. Depois prefira IDs públicos como c_..., m_..., a_....
  5. Não peça JID, endpoint, API key, sessão, seletor, scroll, DOM, composer ou posição de tela ao usuário.
  6. whatsapp_get_chat_info é barato; whatsapp_get_chat pode hidratar histórico e gerar artefatos.
  7. Passe períodos naturais diretamente, como hoje, ontem, março de 2026, últimos 30 dias ou 13/06/2026 das 13h ate 14h. O MCP normaliza datas, carrega lotes antigos e declara cobertura; não tente controlar scroll, DOM ou paginação de tela.
  8. Resultados grandes devem virar conversation.md, conversation.jsonl e manifest.json; não despeje histórico enorme no contexto.
  9. Leituras nunca enviam, limpam ou substituem drafts do usuário.
  10. Use whatsapp_get_media pelo message_id; nunca associe mídia por chute.
  11. Use whatsapp_understand para transcrição WhisperX, OCR, extração de documentos e ZIP. Ele aceita message_id e captura a mídia internamente. Transcrição é compacta; peça formats=["segments"] apenas quando necessário.
  12. Trate perfil, sessão, API key, exports, mídia, transcripts e actions como dados sensíveis.
  13. Para a mídia mais recente de um chat, use types e limit=1. audio inclui notas de voz; ptt seleciona somente notas de voz.

Read the full file on GitHub · 116 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. 1mo ago Changed · +56 lines · +728 tokens per session 57700820222b
  2. 2mo ago First seen · 60 lines · 534 tokens per session scan A 87b88cc683df

Subscribe to this mod's changes

whatsapp-web-mcp AGENTS.md is an instructions file published in the GitHub repository KingDonRush/whatsapp-web-mcp (0 stars, last pushed 1mo ago), licensed MIT. It adds 1,262 tokens to every session, about $0.0050 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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