new-feature-design

Design and document new features with GitHub issue, low-level design (LLD), expert review, and testing plan. Creates structured documentation in .scratchpad/ with issue spec, technical design with diagrams and pseudo-code, multi-persona expert review, and a testing plan covering functional (curl and registry_management.py), backwards-compatibility, UX, ECS/terraform, and E2E API tests. Supports starting from a user…