Advisory Only

Composer JSON Validation Preview

Paste Composer-style JSON and call POST /api/composer/preview to validate before import. The preview reports unsupported steps, missing fields, paths, warning severity, recognized tickers, and copy guidance without changing strategy source.

Preview mode does not import, mutate, deploy, connect brokers, place orders, or change schedules.

Preview Contract

API body can be either the Composer JSON directly or {"composer_json": ...}.