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Immutable Fields

RJSF and JSON Schema support readOnly fields. Massdriver extends this functionality with the $md.immutable (boolean) annotation.

When a field is set to immutable, it cannot be changed once provisioned. This is useful for adding guardrails on fields that might cause recreation if a value is changed. I.e.: changing the CIDR address of a VPC.


This is currently only supported on top-level properties.

title: Immutable Field Example
type: object
title: CIDR Range
$md.immutable: true
type: string