Agent skills for Codex CLI

Hierarchical content structure - answer first, then supporting arguments, then details

Pyodide WASM apps in Web Workers. Use for Python-in-browser.

Complete guide for Pyth Network - decentralized oracle providing real-time price feeds for DeFi.

When to activate: httpx, API clients, retry logic, auth headers, rate limiting client-side, OpenAPI client generation

Creates FastAPI endpoints with layered architecture (Router → Service → Repository).

Best practices, common mistakes, decision guidance, and checklists for async Python, asyncio, and FastAPI — covering single-instance code…

Production Python async patterns including asyncio TaskGroup, FastAPI dependency injection and middleware, SQLAlchemy 2.0 async sessions…

Python background job patterns including task queues, workers, and event-driven architecture.

When to activate: ARQ, RQ, background workers, Redis-based queues, async task workers

Guidance for writing, reviewing, and refactoring Python code with clear style, naming, design principles, and testing discipline.

Python code style, linting, formatting, naming conventions, and documentation standards.

When to activate: multiprocessing, threading, concurrent.futures, ProcessPoolExecutor, GIL, CPU-bound tasks

Python configuration management via environment variables and typed settings.

When to activate: configuration management, pydantic-settings, env files, feature flags, environment-specific settings

Python data processing pipelines with modular architecture.

When to activate: ETL, data pipeline, Prefect, Airflow, DLT, Polars, batch processing, data quality

Python design patterns including KISS, Separation of Concerns, Single Responsibility, and composition over inheritance.

Modern Python development workflow where ALL Python execution goes through uv run — never call python, pip, or pytest directly.

Set up a Python virtual environment and install Reflex.

Python error handling patterns including input validation, exception hierarchies, and partial failure handling.

When to activate: event-driven architecture, domain events, event sourcing, Kafka, RabbitMQ, NATS