Mode Behavior

Mode	UI Methods	Notes
Interactive (default)	Full TUI	Normal operation
RPC (`--mode rpc`)	JSON protocol	Host handles UI, dialogs work via sub-protocol
JSON (`--mode json`)	No-op	Event stream to stdout
Print (`-p`)	No-op	Extensions run but can't prompt users

Always check ctx.hasUI before calling dialog methods in extensions that might run in non-interactive modes:

if (ctx.hasUI) {
  const ok = await ctx.ui.confirm("Delete?", "Sure?");
} else {
  // Default behavior for non-interactive mode
}