| Name | Type | Description |
|---|---|---|
canonical* | str | The canonical environment variable name. |
Return whichever env var name actually carries the resolved value.
Mirrors resolve_env_var's precedence: when the prefixed variant is
present in os.environ (even empty), it wins; otherwise the canonical
name is returned. Useful for UI labels that need to reflect what the
CLI is actually reading rather than the canonical name.
