[theoparis]

Fixes #1

[kolkov]

Thanks for the PR @theoparis! The \r\033[2K render fix is spot-on — that's the correct portable approach for terminal line clearing.

However, before we review this further, could you try the feature/tea-exec-process branch? It already includes both of these fixes with a different architectural approach:

1. Render fix — \r\033[2K is already implemented as an atomic write (clear+render in one string to prevent flickering on macOS Terminal.app)

2. Command routing — instead of changing isInteractiveCommand(), we reworked the execution model based on UI mode:

   • Classic mode: all external commands → ExecProcessWithTTY (direct TTY, like bash)
   • Non-classic modes (Warp/Compact/Chat): all external commands → async capture for viewport display

   The concern with !isBuiltinCommand() is that it routes commands like ls, grep, git status through ExecProcess, which prevents output capture for viewport-based modes.

git checkout feature/tea-exec-process
go build -o gosh ./cmd/gosh
./gosh

The branch will be merged to main in the coming days. Would appreciate your feedback on macOS — feel free to base any further contributions on it.