v0.4.0

Changelog

• 6051945 Harden Responses agent mode streaming
• 2e484d0 Include response id in stream timeouts
• f641be4 Increase autosuggest output token cap
• 341a78a Gate slow PTY E2E tests
• 53f033f Color reasoning summary lines
• 16c082b Stream reasoning summaries
• a6f4a75 Detect max output token truncation
• d35c36e Truncate oversized shell call output
• cab4737 Use PTY foreground process group for shell child detection
• 13dfede Upgrade default model to gpt-5.5 fast high