pub const BACKEND_VALUES: [&str; 3];Expand description
Compute backends --backend accepts on apr run / apr chat.
The flag used to be a free-form String: --backend banana printed
Backend override: banana and then quietly ran the default backend. That is
the exact failure the --backend cuda guard in dispatch.rs exists to
prevent — a run whose throughput number was taken through a backend the
caller did not ask for — so a typo must be rejected by the parser, not
echoed back.