Module session 

Interactive chat session with /model and /provider commands

Provides a rich REPL experience similar to Claude Code with:

• /model - Select from available models based on configured API keys
• /provider - Switch provider (prompts for API key if not set)
• /cost - Show token usage and estimated cost
• /help - Show available commands
• /clear - Clear conversation history
• /exit or /quit - Exit the session

Structs

ChatSession

Chat session state

Functions

get_available_models

Available models per provider