Queue a brief

Requires the briefs scope. Queues a brief on a matter against a live expert class and answers 202 at once; poll GET /briefs/{id} or listen for the brief.completed webhook. Credits are charged when the brief is delivered, never for a brief that fails. The balance is checked before queueing.

side, when given, must agree with the side the expert class models. With a test key the brief is finished on arrival with a sample result and nothing is charged.

A report analyzed on the matter (POST /reports/analyze, or in the app) is read by every brief on it. use_matter_target_report: true makes that explicit, pins the report as it stands now onto this brief, and refuses the brief (no_target_report) when the matter has none. Send it or target_report, not both.

holdout is for evaluation. It names up to 20 cases (typically the ruling a benchmark will score this brief against, and its appeals) that the brief must not read: they are withheld from every source the brief draws on, and the result reports what was withheld under result.holdout. It binds this brief only and does not change the matter.