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

Errors Values and types · rule

`type.duplicate_variant_field`

Variant field is given twice.

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

example

type DeclineReason = Text {    max_length: 200}type PaymentOutcome = Enum {    declined: {        reason: DeclineReason    }}function declined_payment(reason: DeclineReason) -> PaymentOutcome {    return PaymentOutcome.declined {        reason: reason        reason: reason    }}

jadpo checkcheck failed: 1 error, 1 file

error reason is given twice

--> main.jadpo:14:9

   |13 |         reason: reason   |         ------ first given here14 |         reason: reason   |         ^^^^^^ given again

reason: Each field of PaymentOutcome.declined is given once, so there is never a question of which value counts.
next: Remove one reason (agent)
rule: type.duplicate_variant_field
help: https://jadpo.dev/docs/errors/type.duplicate_variant_field

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