UI rendering artifacts (double rendering) in Gemini CLI when used within shpool sessions

[braddux]

What happened?

• Issue: When running the Gemini CLI interactive UI inside a multiplexed terminal session using shpool, UI elements like the footer and settings dialogs often render twice or exhibit flickering artifacts.

• Root Cause: The application was manually entering the alternate screen buffer while simultaneously instructing the ink library to do the same, leading to redundant and conflicting terminal control sequences. Additionally, shpool requires a small stabilization window during TUI startup and can exhibit frame-replay artifacts with incremental rendering enabled.

What did you expect to happen?

rendering should look correct

Client information

Client Information

Run gemini to enter the interactive CLI, then run the /about command.

> /about
│ About Gemini CLI                                                                                                       │
│                                                                                                                        │
│ CLI Version                              0.28.0-preview.6                                                              │
│ Git Commit                               44c67daa0                                                                     │
│ Model                                    auto-gemini-3                                                                 │
│ Sandbox                                  no sandbox                                                                    │
│ OS                                       linux                                                                         │
│ Auth Method                              Logged in with Google (REDACTED)                                    │
│ GCP Project                              shared-g3-gemini-quota   

Login information

Google account

Anything else we need to know?

No response