Jadpo is experimental and not ready for production. These docs follow the compiler's main branch as of 5 Nov 2026. What's built · Install 0.3.0

ReferenceErrors

`type.copy_clash`

Copied field would replace another field.

Area 2, Values and types; not declinable; the next step is usually the agent's.

example

type TodoView = Output {    pick: [Todo.id, Todo.title, Note.title]}

jadpo checkcheck failed: 1 error, 2 files

error title is already in TodoView, from Todo

--> main.jadpo:2:33

  |2 |     pick: [Todo.id, Todo.title, Note.title]  |                                 ^^^^^^^^^^ copied again

reason: A copied field never replaces another field, because a field added to a source type would then change this type unseen.
next: Remove title from one of them with omit: [...], or write title as a field below them (agent)
rule: type.copy_clash
help: https://jadpo.dev/docs/errors/type.copy_clash

Markdown for agents: /docs/errors/type.copy_clash.md.Built from Jadpo main at aee2e8f.