020-security

020-security is a cursor rule for Cursor from juandoroteoflesiauni-lang/Market-options-stocks-Scanner. It costs 0 tokens per session (2,148 once invoked), scanned A, original, Apache-2.0.

A set of critical security rules for a trading terminal where real money may be involved. It covers secrets such as API keys, passwords and login tokens, and requires them to be loaded from environment settings rather than source code.

In plain words
What is it for?
Use it when configuring exchange access, databases, authentication, environment files and the project’s ignored files.
Why use it?
It helps prevent private credentials from being exposed in the codebase or accidentally committed to version control.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/.

Good fit Use it when configuring exchange access, databases, authentication, environment files and the project’s ignored files.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/juandoroteoflesiauni-lang/market-options-stocks-scanner/020-security
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/juandoroteoflesiauni-lang/Market-options-stocks-Scanner

Made for: Cursor.

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 020-security

README.md
[![agentmods](https://agentmods.dev/badge/rules/juandoroteoflesiauni-lang/market-options-stocks-scanner/020-security/github.svg)](https://agentmods.dev/rules/juandoroteoflesiauni-lang/market-options-stocks-scanner/020-security)
Your own site
<a href="https://agentmods.dev/rules/juandoroteoflesiauni-lang/market-options-stocks-scanner/020-security"><img src="https://agentmods.dev/badge/rules/juandoroteoflesiauni-lang/market-options-stocks-scanner/020-security/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 020-security

Your own site · 80×15
<a href="https://agentmods.dev/rules/juandoroteoflesiauni-lang/market-options-stocks-scanner/020-security"><img src="https://agentmods.dev/badge/rules/juandoroteoflesiauni-lang/market-options-stocks-scanner/020-security.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 2,148 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00000 $0.02148
Opus 5 $0.00000 $0.01074
Sonnet 5 $0.00000 $0.00430
Haiku 4.5 $0.00000 $0.00215

Measured 12d ago against content hash 5dcad4b01c2f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

020-security 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 12d 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.

.cursor/rules/020-security.mdc · 316 lines

How it starts

The opening of the file, as written. The whole thing — 316 lines — stays where its author put it; the contents beside it link to each section on GitHub.

🔴 SEGURIDAD — TRADING TERMINAL

ESTAS REGLAS PROTEGEN DINERO REAL. NO NEGOCIABLES.


🔑 GESTIÓN DE SECRETOS — REGLA #1

JAMÁS en el código fuente:

# ❌ CRÍTICO — NUNCA HACER ESTO
BINANCE_API_KEY = "abc123xyz..."
db_password = "mi_password_secreta"
JWT_SECRET = "supersecret"

# ✅ SIEMPRE así
import os
from core.config import settings

BINANCE_API_KEY = settings.BINANCE_API_KEY  # Lee desde .env

Archivo .env — Template obligatorio:

# ============================================================
# TRADING TERMINAL — VARIABLES DE ENTORNO
# NUNCA commitear este archivo. Está en .gitignore.
# ============================================================

# Base de datos
DATABASE_URL=postgresql://trading_user:CAMBIAR_PASSWORD@localhost:5432/trading_db
REDIS_URL=redis://localhost:6379/0

# Autenticación JWT
SECRET_KEY=GENERAR_CON_openssl_rand_hex_32
JWT_ALGORITHM=HS256
JWT_EXPIRE_MINUTES=60

# APIs de Trading (dejar vacío, completar manualmente)
BINANCE_API_KEY=
BINANCE_API_SECRET=
MT5_LOGIN=
MT5_PASSWORD=
MT5_SERVER=

# Entorno
ENVIRONMENT=development
DEBUG=false
ALLOWED_ORIGINS=http://localhost:5173

.gitignore obligatorio:

# CRÍTICO — NUNCA commitear
.env
.env.local
.env.production
*.pem
*.key
secrets/

🛡️ AUTENTICACIÓN Y AUTORIZACIÓN

JWT Implementation:

# core/security.py

from datetime import datetime, timedelta
from jose import JWTError, jwt
from passlib.context import CryptContext
from core.config import settings

pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")

def create_access_token(data: dict) -> str:
    """Crear JWT con expiración."""
    to_encode = data.copy()
    expire = datetime.utcnow() + timedelta(minutes=settings.JWT_EXPIRE_MINUTES)
    to_encode.update({
        "exp": expire,
        "iat": datetime.utcnow(),
        "type": "access"
    })
    return jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.JWT_ALGORITHM)

def verify_token(token: str) -> dict:
    """Verificar JWT — lanza excepción si inválido."""
    try:
        payload = jwt.decode(token, settings.SECRET_KEY, algorithms=[settings.JWT_ALGORITHM])
        if payload.get("type") != "access":
            raise ValueError("Invalid token type")
        return payload
    except JWTError:
        raise UnauthorizedError("Token inválido o expirado")

def hash_password(password: str) -> str:
    return pwd_context.hash(password)

def verify_password(plain: str, hashed: str) -> bool:
    return pwd_context.verify(plain, hashed)

Read the full file on GitHub · 316 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. 12d ago First seen · 316 lines · 0 tokens per session scan A 5dcad4b01c2f

Subscribe to this mod's changes

020-security is a cursor rule published in the GitHub repository juandoroteoflesiauni-lang/Market-options-stocks-Scanner (11 stars, last pushed 2mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 2,148 tokens. 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.