Constant PROXY_START_CLI_FIELDS 

pub const PROXY_START_CLI_FIELDS: &[&str];

Every key the CLI puts in a POST /api/proxy/start body.

The two ends of that body cannot meet in one test. StartProxyBody is pub(crate) inside gglib-cli’s pub(crate) mod daemon_client, and StartProxyConfig is pub(crate) inside gglib-axum’s pub(crate) mod handlers; both crates deny unreachable_pub, and gglib-axum may not depend on gglib-cli. So each side pins itself against this list instead — the same trick CLI_ROUTE_CONTRACT uses for paths.