prompt.placeholder_type: A prompt's field is of a type a prompt can't send

A prompt's field is of a type a prompt can't send.

Area 21, AI; not declinable; the next step is usually the agent's.

A prompt sends text: a secret, bytes, a file or its bytes, or a BatchRun (however deep, since an object is written as its JSON), a value that may be none or a second conversation can't be one of its fields, and a conversation is sent as the turns, never written in the text.

example

/// Describes the photo a customer sent of their order.type DescribePhoto = Prompt {    photo: Bytes    reader_locale: Locale}

jadpo checkcheck failed: 1 error, 2 files

error DescribePhoto.photo is Bytes, which a prompt can't send

--> domains/support/prompts/describe_photo.jadpo:3:5

  |3 |     photo: Bytes  |     ^^^^^ not text

reason: A prompt is text. Images, audio and other bytes are sent by a provider package's own operations, not in a prompt, and a File, even inside an object, is only the store and key its bytes are under.
next: Remove photo, or send what it holds as text (agent)
rule: prompt.placeholder_type
help: https://jadpo.dev/docs/errors/prompt.placeholder_type