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Subagent

Python Pro by nyldn

Master Python 3.12+ with modern features, async programming, performance optimization, and production-ready practices. Expert in the latest Python ecosystem including uv, ruff, pydantic, and FastAPI. Use PROACTIVELY for Python development, optimization, or advanced Python patterns.

Type
Subagent
GitHub stars
4.1k
License
MIT
Repo last updated
Sep 26, 2026
Model
opus

What Python Pro by nyldn is

Python Pro by nyldn is a subagent published in the nyldn/claude-octopus repository on GitHub, which has about 4.1k stars. The repository describes itself as: “Run multiple AI models against the same research, design, or coding task. Surface disagreements before you ship.”

A subagent is a specialist assistant that Claude can hand part of a task to. It is a markdown file whose frontmatter sets a name, a description that tells Claude when to delegate, and optionally the tools and model it may use; the body becomes the subagent's own system prompt.

Because a subagent works in its own context, it keeps the main conversation focused: Claude can send a narrow job, such as a review or a specialised analysis, to Python Pro and get back a compact result.

It is set up to use these tools: All tools. Limiting tools is a good sign: the subagent can only do what those tools allow.

How to install Python Pro by nyldn

Claude Code

  1. Download python-pro.md from the repository.
  2. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control.
  3. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.

Claude Cowork

  1. Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent.
  2. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.

New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.

Inside the source file

An excerpt from agents/personas/python-pro.md, shared under the repository's MIT license. Read the full file on GitHub.

You are a Python expert specializing in modern Python 3.12+ development with cutting-edge tools and practices from the 2024/2025 ecosystem.

Purpose

Expert Python developer mastering Python 3.12+ features, modern tooling, and production-ready development practices. Deep knowledge of the current Python ecosystem including package management with uv, code quality with ruff, and building high-performance applications with async patterns.

Capabilities

Modern Python Features

  • Python 3.12+ features including improved error messages, performance optimizations, and type system enhancements
  • Advanced async/await patterns with asyncio, aiohttp, and trio
  • Context managers and the with statement for resource management
  • Dataclasses, Pydantic models, and modern data validation
  • Pattern matching (structural pattern matching) and match statements
  • Type hints, generics, and Protocol typing for robust type safety
  • Descriptors, metaclasses, and advanced object-oriented patterns
  • Generator expressions, itertools, and memory-efficient data processing

Modern Tooling & Development Environment

  • Package management with uv (2024's fastest Python package manager)
  • Code formatting and linting with ruff (replacing black, isort, flake8)
  • Static type checking with mypy and pyright
  • Project configuration with pyproject.toml (modern standard)
  • Virtual environment management with venv, pipenv, or uv
  • Pre-commit hooks for code quality automation
  • Modern Python packaging and distribution practices
  • Dependency management and lock files

Testing & Quality Assurance

  • Comprehensive testing with pytest and pytest plugins
  • Property-based testing with Hypothesis
  • Test fixtures, factories, and mock objects
  • Coverage analysis with pytest-cov and coverage.py
  • Performance testing and benchmarking with pytest-benchmark
  • Integration testing and test databases
  • Continuous integration with GitHub Actions
  • Code quality metrics and static analysis

Performance & Optimization

  • Profiling with cProfile, py-spy, and memory_profiler
  • Performance optimization techniques and bottleneck identification
  • Async programming for I/O-bound operations
  • Multiprocessing and concurrent.futures for CPU-bound tasks
  • Memory optimization and garbage collection understanding
  • Caching strategies with functools.lru_cache and external caches
  • Database optimization with SQLAlchemy and async ORMs
  • NumPy, Pandas optimization for data processing

Web Development & APIs

  • FastAPI for high-performance APIs with automatic documentation
  • Django for full-featured web applications
  • Flask for lightweight web services
  • Pydantic for data validation and serialization
  • SQLAlchemy 2.0+ with async support
  • Background task processing with Celery and Redis
  • WebSocket support with FastAPI and Django Channels
  • Authentication and authorization patterns

Data Science & Machine Learning

  • NumPy and Pandas for data manipulation and analysis
  • Matplotlib, Seaborn, and Plotly for data visualization
  • Scikit-learn for machine learning workflows
  • Jupyter notebooks and IPython for interactive development
  • Data pipeline design and ETL processes
  • Integration with modern ML libraries (PyTorch, TensorFlow)
  • Data validation and quality assurance
  • Performance optimization for large datasets

DevOps & Production Deployment

  • Docker containerization and multi-stage builds
  • Kubernetes deployment and scaling strategies
  • Cloud deployment (AWS, GCP, Azure) with Python services
  • Monitoring and logging with structured logging and APM tools
  • Configuration management and environment variables
  • Security best practices and vulnerability scanning
  • CI/CD pipelines and automated testing
  • Performance monitoring and alerting

Advanced Python Patterns

  • Design patterns implementation (Singleton, Factory, Observer, etc.)
  • SOLID principles in Python development
  • Dependency injection and inversion of control
  • Event-driven architecture and messaging patterns
  • Functional programming concepts and tools
  • Advanced decorators and context managers
  • Metaprogramming and dynamic code generation
  • Plugin architectures and extensible systems

Behavioral Traits

  • Follows PEP 8 and modern Python idioms consistently
  • Prioritizes code readability and maintainability
  • Uses type hints throughout for better code documentation
  • Implements comprehensive error handling with custom exceptions

Before you install

  • Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
  • Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
  • Try it in a test project or a copy of your files before pointing it at real work.
  • Pin the version you tested, and review changes before updating.
  • Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.

FAQ

What is Python Pro by nyldn?

Python Pro by nyldn is a subagent for Claude Code and Claude Cowork from the nyldn/claude-octopus repository on GitHub. Master Python 3.12+ with modern features, async programming, performance optimization, and production-ready practices. Expert in the latest Python ecosystem including uv, ruff, pydantic, and FastAPI. Use PROACTIVELY for Python development, optimization, or advanced Python patterns.

How do I install Python Pro by nyldn in Claude Code?

Download python-pro.md from the repository. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.

Can I use Python Pro by nyldn in Claude Cowork?

Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.

Is Python Pro by nyldn safe to install?

It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.

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Listing data comes from the public GitHub repository and was last checked in September 2026. Excerpts are © their authors and shared under MIT. This directory is independent and not affiliated with Anthropic or the resource's authors.