hi-shell is a Go-based zsh plugin that suggests shell commands via LLM when you describe what you need, displaying suggestions as ghost text and blocking risky commands. Users type 'hi' followed by a description, review the suggestion, and optionally accept it with Tab or ask follow-up questions with 'hi?' or 'hi:'. It supports OpenAI, DeepSeek, and Claude as LLM providers with API keys stored as environment variables.