Architecture Development Notes

Oct 22, 2026 · Backend Development

Claude User Profiles: Per-Client Enforcement Only on Platforms Verifying IDs Per Request

Anthropic's user profiles shift enforcement from organization to end-client level, but only on platforms that verify profile IDs per request; gateways must create profiles at registration, store IDs on customer records, inject headers at the sole egress point, and handle platform-specific gaps like Bedrock's format-only validation and AWS's missing enforcement reporting.