Jadpo is experimental and not ready for production. These docs follow the compiler's main branch as of 30 Oct 2026. What's built · Install 0.1.0
jadpo
Reference: Identity

Identity · rule

type.principal_subject_not_unique

Principal's subject field is not unique.

Area 8, Identity; not declinable; the next step is usually the agent's.

example
principal {    user: {        subject: Member.handle    }}type Handle = Text {    max_length: 40}entity Member {    id: Uuid    handle: Handle}
text
error: `Member.handle` doesn't identify one user --> main.jadpo:3:18  |3 |         subject: Member.handle  |                  ^^^^^^^^^^^^^ not unique  reason: A caller is looked up by its subject, so the subject names exactly one record: `Member.handle` isn't `unique: true`.  next: Make `handle` a required field with `unique: true`, or name one that is (agent)  rule: type.principal_subject_not_unique  help: https://jadpo.dev/docs/errors/type.principal_subject_not_uniquecheck failed: 1 error, 1 file

Markdown for agents: /docs/errors/type.principal_subject_not_unique.md.Built from Jadpo main at a707efb.