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[Gerald Combs]

Jason Clinton wrote:
> As in shell expressions may manipulate the terminal window's properties
> and GUI settings for shell behavior like the prompt and command-key
> style and certain environment variables? Like escape codes but less
> cryptic and more robust?

Yes.  And the communication between the terminal and shell needs to be
bidirectional.  I want my terminal app to be able to get _and_ put
commands, environment variables, working directories, and anything else
that might be useful.