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Gate: validation-transitions

Every validation of a visual unit is the trigger of a state transition, or says @no-state: <reason>.

Property Value
Checker validation-transitions
Confronts code
Blocking by default — new project yes
Blocking by default — existing project no — informs

A validation changes the screen: the form refuses, a field turns red, a button disables, the flow takes another path. Each of those is a state, and the states are already proven by their visual capture. So a validation does not need a capture of its own; it needs to say which state it leads to. An error, too, shows on the screen — as the message the spec catalogs; the state is the same, what changes is the text, and the messages are captured.

Two gates tie each change of a visual unit to what the screen shows:

Gate Question
validation-transitions Is every validation the trigger of a State Flow transition, from the state it is checked in to the state it leads to — or does it say @no-state: <reason>?
error-message-declared Does every error name the message it shows — or say @no-message: <reason>?

They run, like the visual-regression gates, on a visual unit’s main code file and read the spec beside it; sections and columns are read in any language of the catalog.

gates:
- name: validation-transitions
on: [code]
check: validation-transitions

Source: checker · its spec