Testing notes:

1. Use the testing widget's Try It! option to test this endpoint.
2. Use the Examples > Request Example option to see how to initiate body parameters. Copy the example into an external tool if needed.

Error handling:

This endpoint always returns HTTP 200 when the request is accepted, even if some items in the items array fail.

• Inspect the results array for every item — do not assume all skills were updated because the top-level call returned 200.
• Each result includes index (matching the request item), status (succeeded or failed), httpStatus, and either a resource or an errors array.
• Items are resolved only by /skill/source + /skill/externalId. Locators that point to Bob-created (non-API-origin) skills are reported as not found.
• Common per-item failures include missing locator fields, no writable field provided, skill not found, and unknown proficiency level IDs.
• Retry only after correcting the failed items. Successful items in the same request are already updated.