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mercadopago-claude-marketplace: Instructions file for Claude Code

AGENTS.md

mercadopago-claude-marketplace AGENTS.md is an instructions file for Claude Code, Codex, OpenCode from mercadopago/mercadopago-claude-marketplace. It costs 754 tokens per session, scanned A, original, Apache-2.0.

A development guide for the official Mercado Pago plugin marketplace for Claude Code, an AI coding tool. It documents the plugin’s agent, skills, commands, file formats, paths, and rules for connecting external tools.

In plain words
What is it for?
Use it when developing, reviewing, or validating Mercado Pago’s Claude Code marketplace plugin, including its agents, skills, commands, references, paths, and tool configuration.
Why use it?
It gives contributors a common contract for changing the marketplace without breaking Claude Code behavior or exposing plugin files and settings in users’ projects. It also preserves offline-capable work and controlled tool authentication.

Instructions file for Claude CodeCodexOpenCode

Written for Claude Code and Codex and OpenCode: ${CLAUDE_PLUGIN_ROOT} variable, but also the file is AGENTS.md. Also seen: reads .claude/ paths; mentions .claude-plugin; mentions Claude Code.

This is mercadopago/mercadopago-claude-marketplace's own configuration. It tells Claude Code, Codex and OpenCode how to work on mercadopago-claude-marketplace 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 mercadopago-claude-marketplace configures →

Runs only inside a plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else, and the catalogue could not identify which plugin ships it.

not rated 32repo changed 1mo ago A scan 754 tokens original Apache-2.0
View source ↗ mercadopago/mercadopago-claude-marketplace
Reuse

Borrowing it

Nothing to install: this file belongs to mercadopago/mercadopago-claude-marketplace. 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/mercadopago/mercadopago-claude-marketplace/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/mercadopago/mercadopago-claude-marketplace

Made for: Claude Code, Codex, OpenCode.

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Per session 754 This file is loaded in full into every session.
When invoked 754 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 $0.00754 $0.00754
Opus 5.5 $0.00302 $0.00302
Sonnet 5.5 $0.00151 $0.00151
Haiku 4.5 $0.00075 $0.00075

Measured 1mo ago against content hash 91f78cccb63e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mercadopago-claude-marketplace 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 · 65 lines

How it starts

The opening of the file, as written. The whole thing — 65 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Claude Plugin Development Guide

This repository builds the official Mercado Pago plugin marketplace for Claude Code. All runtime behavior, examples, paths, and validation must target Claude Code, not another agent platform.

Architecture

  • One Claude agent: plugins/mercadopago/agents/mp-integration-expert.md.
  • Four passive skills only: mp-integrate, mp-webhooks, mp-test-setup, and mp-review.
  • Commands are user-facing Claude Code slash commands.
  • The agent is a thin router; implementation guidance belongs in skills and their approved references.
  • MCP is connected only immediately before a selected operation needs an MCP tool. Offline-capable work must remain available.

Plugin paths

  • Use ${CLAUDE_PLUGIN_ROOT} for scripts, references, and configuration bundled with the active plugin version.
  • Use ${CLAUDE_PLUGIN_DATA} only for persistent plugin-owned data that must survive updates.
  • Use ${CLAUDE_PROJECT_DIR} for the developer's application.
  • Never hardcode or scan ~/.claude/plugins/cache.
  • Never copy the plugin's .mcp.json into the developer's project. Claude Code registers plugin MCP servers from the plugin manifest.

File formats

  • Agent frontmatter requires tools, model, tags, category, and version.
  • Skill frontmatter uses a metadata block. Never add tools or model to a skill.
  • Command frontmatter uses allowed-tools, not tools.
  • Keep the agent under 150 lines.
  • Keep the skill count at four unless the architecture is intentionally redesigned.

Integration invariants

  • Checkout Pro and Checkout API must always resolve a concrete checkout CTA.
  • Checkout Pro places a visible Mercado Pago payment button at the resolved location.
  • Checkout API creates a separate payment page and links the resolved CTA to it.
  • Every visible checkout field has a persistent associated label.
  • Secure card hosts remain interactive and are never disabled, readonly, inert, or covered by an overlay.
  • Public client configuration is loaded at runtime without HTML placeholder substitution.
  • Checkout Pro via Preferences uses /checkout/preferences and returns init_point. Checkout Pro via Orders uses POST /v1/orders and returns checkout_url. Do not mix either contract with Checkout API processing.
  • Never install or update an SDK without authorization. Once authorized, use the official current stable release and update the lockfile.

Read the full file on GitHub · 65 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 · +2 lines · +28 tokens per session 91f78cccb63e
  2. 2mo ago First seen · 63 lines · 726 tokens per session scan A 0d9a4d9ccd66

Subscribe to this mod's changes

mercadopago-claude-marketplace AGENTS.md is an instructions file published in the GitHub repository mercadopago/mercadopago-claude-marketplace (32 stars, last pushed yesterday), licensed Apache-2.0. It adds 754 tokens to every session, about $0.0030 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.

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