allium

Allium is a formal language for capturing software behaviour at the domain level. It sits between informal feature descriptions and implementation, providing a precise way to specify what software does without prescribing how it's built. The name comes from the botanical family containing onions and shallots, continuing a tradition in behaviour specification tooling established by Cucumber and Gherkin. Key principles: Allium does NOT specify programming language or framework choices, database schemas or storage mechanisms, API designs or UI layouts, or internal algorithms (unless they are domain-level concerns). A base entity declares a discriminator field whose capitalised values name the variants. Variants use the variant keyword. Lowercase pipe values are enum literals ( status: pending | active ). Capitalised values are variant references ( kind: Branch | Leaf ).