Added thinking level persistence. Default level stored in ~/.pi/settings.json, restored on startup. Per-session overrides saved in session files.
Added model cycling shortcut: Ctrl+I cycles through available models (or scoped models with -m flag).
Added automatic retry with exponential backoff for transient API errors (network issues, 500s, overload).
Cumulative token usage now shown in footer (total tokens used across all messages in session).
Added --system-prompt flag to override default system prompt with custom text or file contents.
Footer now shows estimated total cost in USD based on model pricing.
Changed
Replaced --models flag with -m/--model supporting multiple values. Specify models as provider/model@thinking (e.g., anthropic/claude-sonnet-4-20250514@high). Multiple -m flags scope available models for the session.
Thinking level border now persists visually after selector closes.
Improved tool result display with collapsible output (default collapsed, expand with Ctrl+O).