> ## Documentation Index
> Fetch the complete documentation index at: https://opentrain.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Plan a Job Instruction Image

> Derive the stable final image URL without uploading image bytes.

Plans the final URL for an instruction image without uploading or editing a
page. Requires `instructions:write` and employer access.

Send `fileName`, `contentType`, `sizeBytes`, the lowercase SHA-256 digest of the
bytes, and an `idempotencyKey`. The response returns the same metadata, stable
final URL, and `writesApplied: false`. A later upload with the same bytes and
idempotency key must resolve to that reviewed URL.