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 Reads and writes · rule

`query.aggregate_argument`

Aggregate is given the wrong arguments.

Area 6, Reads and writes; not declinable; the next step is usually the agent's.

example

type LeafCount = Int {    min: 1}entity Book {    id: Uuid    leaves: LeafCount}type ShelfLength = Output {    mean_leaves: Decimal?}query shelf_length() -> ShelfLength {    from: Book    aggregate: {        mean_leaves: average(Book.leaves)    }}

jadpo checkcheck failed: 1 error, 1 file

error average needs scale: and rounding:

--> main.jadpo:17:22

   |17 |         mean_leaves: average(Book.leaves)   |                      ^^^^^^^^^^^^^^^^^^^^ wrong arguments

reason: An average rarely comes out exact, so it says how many places it keeps and how the last one is rounded, both written out: average(Book.<field>, scale: 2, rounding: Rounding.half_even).
next: Add scale: and rounding: (agent)
rule: query.aggregate_argument
help: https://jadpo.dev/docs/errors/query.aggregate_argument

Markdown for agents: /docs/errors/query.aggregate_argument.md.Built from Jadpo main at aee2e8f.