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## Summary - Retire the experimental TUI2 implementation and its feature flag. - Remove TUI2-only config/schema/docs so the CLI stays on the terminal-native path. - Keep docs aligned with the legacy TUI while we focus on redraw-based improvements. ## Customer impact - Retires the TUI2 experiment and keeps Codex on the proven terminal-native UI while we invest in redraw-based improvements to the existing experience. ## Migration / compatibility - If you previously set tui2-related options in config.toml, they are now ignored and Codex continues using the existing terminal-native TUI (no action required). ## Context - What worked: a transcript-owned viewport delivered excellent resize rewrap and high-fidelity copy (especially for code). - Why stop: making that experience feel fully native across the environment matrix (terminal emulator, OS, input modality, multiplexer, font/theme, alt-screen behavior) creates a combinatorial explosion of edge cases. - What next: we are focusing on redraw-based improvements to the existing terminal-native TUI so scrolling, selection, and copy remain native while resize/redraw correctness improves. ## Testing - just write-config-schema - just fmt - cargo clippy --fix --all-features --tests --allow-dirty --allow-no-vcs -p codex-core - cargo clippy --fix --all-features --tests --allow-dirty --allow-no-vcs -p codex-cli - cargo check - cargo test -p codex-core - cargo test -p codex-cli