NexusTrader CLAUDE.md

Project instructions for coding agents working on NexusTrader, a Python and Rust platform for automated quantitative trading.

In plain words
What is it for?
Use them when installing dependencies, running tests, checking code style, starting supporting services, or working on exchange and trading components.
Why use it?
They document the project setup, development services, testing, formatting, and linting commands needed for reliable changes.

Instructions file

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.

agentmods
npx agentmods add instructions/quantweb3-com/nexustrader/claude-md
Clone the repo
git clone --depth 1 https://github.com/Quantweb3-com/NexusTrader
Per session 1,552 This file is loaded in full into every session.
When invoked 1,552 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.01552 $0.01552
Opus 5 $0.00776 $0.00776
Sonnet 5 $0.00310 $0.00310
Haiku 4.5 $0.00155 $0.00155

Measured 3d ago against content hash 693cc9ad4132, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

NexusTrader CLAUDE.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 3d 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.

CLAUDE.md · 211 lines

How it starts

The opening of the file, as written. The whole thing — 211 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

NexusTrader is a professional-grade quantitative trading platform built with Python 3.11+ that focuses on high-performance, low-latency trading across multiple exchanges. It features a modular, event-driven architecture with Rust-powered core components for maximum performance.

Development Commands

Dependencies and Setup

# Install with uv (package manager used in this project)
uv sync

# Install development dependencies
uv sync --group dev

# Install pre-commit hooks (required for contributions)
uv add --dev pre-commit
pre-commit install

Testing

# Run all tests with async support
uv run pytest

# Run specific test modules
uv run pytest test/core/
uv run pytest test/core/test_entity.py

# Test configuration: pytest.ini enables asyncio_mode = auto

Code Quality

# Linting and formatting (via ruff)
uv run ruff check
uv run ruff format

Development Infrastructure

# Start Redis, PostgreSQL, Loki logging stack
docker-compose up -d

# Clear log files
./clear.sh

# Process management (production)
pm2 start ecosystem.config.js

Architecture Overview

Core Components

  • Engine: Central orchestrator managing all trading systems (nexustrader/engine.py)
  • Strategy: Base class for trading logic with multiple execution modes (nexustrader/strategy.py)
  • Connectors: Exchange-specific public (market data) and private (trading) connectors
  • EMS (Execution Management System): Order submission and execution
  • OMS (Order Management System): Order state tracking and management
  • Cache: High-performance data caching layer (nexustrader/core/cache.py)
  • Registry: Order and component tracking (nexustrader/core/registry.py)

Exchange Integration

Each exchange follows a consistent pattern in nexustrader/exchange/{exchange}/:

  • PublicConnector: Market data WebSocket streams
  • PrivateConnector: Account data and order execution
  • EMS/OMS: Exchange-specific order management
  • ExchangeManager: Coordinate connectors and systems

Read the full file on GitHub · 211 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. 3d ago First seen · 211 lines · 1,552 tokens per session scan A 693cc9ad4132

Subscribe to this mod's changes

NexusTrader CLAUDE.md is an instructions file published in the GitHub repository Quantweb3-com/NexusTrader (658 stars, last pushed 3mo ago), licensed MIT. It adds 1,552 tokens to every session, about $0.0078 per session on Opus 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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