New bulk-install endpoints added for installing one blueprint into many organizations in a single request: POST /v3/blueprint-manifest/bulk-installs, GET /v3/blueprint-manifest/bulk-installs/{bulk_job_id}, GET .../bulk-installs/{bulk_job_id}/targets, and POST .../bulk-installs/{bulk_job_id}/targets/{destination_org_id}:retry for retrying an individual failed target
The Terraform-based v2 install, validate, export, and patch endpoints were deprecated in favor of the V3 install engine (POST /v2/blueprint-manifest/blueprint:install, POST .../blueprints/{blueprint_id}/validate, POST .../blueprints/{blueprint_id}:export, and the .../blueprints/{blueprint_id}/patches family)
POST /v3/blueprint-manifest/blueprint:install now accepts an optional auto_apply flag; when true, the install is applied automatically after the plan and snapshot steps instead of waiting for a separate :continue call