# `flow/condition/compile` Source: [`src/flow/condition/compile.ts`](https://github.com/AI-for-dev/combo/blob/main/src/flow/condition/compile.ts) A condition checked whole against the types of what it may read, before the first spawn. Every address must exist and be typed, the result must be a boolean and compared sides must agree. Enums are strict: `"aproved"` compared with an `approved | rejected` field is refused here, since at run time it would only ever be `false` and the loop would spin to its cap. A string a model wrote in the person's language compares to no literal at all, for the same reason: `"Yes"` against a clicked `"Oui"` is silently false. Problems are collected, not thrown at the first: a flow is refused with every fault at once. A part already refused is read no further, so one typo is one problem and not the three that follow from it. ## `Condition` *type* ```typescript export type Condition = { /** The condition as the file writes it. */ readonly source: string; /** Its parsed form, which only the evaluator reads. */ readonly expr: Expr; readonly [checked]: true; }; ``` A condition that passed the check. Only `compileCondition` makes one, and only one can be evaluated.