cli.Main no longer calls SetOut or SetErr. SetOut also moved the usage
and an unknown help topic, which cobra writes to stderr, onto stdout.
execute now takes the command tree, so the tests build it, set its
arguments and output streams, and run it; the exit line goes to the
command's error stream, which outside a test is stderr as before.
Model: opus-5-5
cmd/simplexcalc/ now holds only main.go: it passes the version the
linker sets to cli.Main and exits with the status that returns. root.go
and run.go move to internal/cli with their comments, changed only to
take the version as a parameter. Main reads the process's arguments and
output; execute takes them as parameters so the new tests can check the
version line and the non-zero status of an unknown command. Commands,
flags, output, log lines and exit status are unchanged, and the
-X main.version flag in the Dockerfile still applies.
Model: opus-5-5
clawbot