opy-cli-0.1.2 is not a library.
opy-cli — the standalone Workshop-independent OPY CLI.
The CLI owns command parsing and presentation. opy-rs owns OPY
parsing, semantic resolution, and structured diagnostics.
Exit codes remain: 0 clean/success, 1 source diagnostics, and 2 usage or I/O errors. Machine-readable output is written directly to stdout without passing through human or GitHub Actions presentation.