Function effort_name 

pub const fn effort_name(effort: Effort) -> &'static str

The tier’s domain name, identical to its wire value.

Renderers compose their own vocabulary from this — a commit subject, a glyph, a colour — but they all start from one token, so none of them can drift away from the schema on its own.

A match here, not strum as the config names use: Effort and Role are engine::schema types, and a derive for a consumer’s convenience does not go on the schema (ADR 0008, 0018). The test below pins the two to serde.