What is NexusTrader CLAUDE.md?

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

Use them when installing dependencies, running tests, checking code style, starting supporting services, or working on exchange and trading components.

They document the project setup, development services, testing, formatting, and linting commands needed for reliable changes.

How Quantweb3-com/NexusTrader configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to Quantweb3-com/NexusTrader. 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/Quantweb3-com/NexusTrader/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/Quantweb3-com/NexusTrader

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/quantweb3-com/nexustrader/claude-md/github.svg)](https://agentmods.dev/instructions/quantweb3-com/nexustrader/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/quantweb3-com/nexustrader/claude-md"><img src="https://agentmods.dev/badge/instructions/quantweb3-com/nexustrader/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/quantweb3-com/nexustrader/claude-md"><img src="https://agentmods.dev/badge/instructions/quantweb3-com/nexustrader/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

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. 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.

Model	Per session	Once invoked
Fable 5.1	$0.01552	$0.01552
Opus 5.5	$0.00621	$0.00621
Sonnet 5.5	$0.00310	$0.00310
Haiku 4.5	$0.00155	$0.00155

Measured 2mo ago against content hash 693cc9ad4132, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 2mo 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.

2mo 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 (671 stars, last pushed 5mo ago), licensed MIT. It adds 1,552 tokens to every session, about $0.0062 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.

Finance and fintech Languages Python Rust cryptocurrency quantitative-finance tradingbot

NexusTrader CLAUDE.md next to 6 instructions from other repositories
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NexusTrader: Instructions file for Claude Code