For AI agents: a documentation index is available at the root level at /llms.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
Process endpoints — duplicate_email_id is now typed as a string (URL to a CSV file) instead of an integer. The legacy in_process status value is now handled correctly across all SDKs.
Event endpoints — contact_properties and event_properties now accept boolean values in createEvent and createBatchEvents.
Contact endpoints — attributes now accepts plain integers in createContact and updateContact. PHP users no longer need to cast integers to float.
