Architecture Decision Records (ADR)

Migration notice (2026-04-23): the 56 ADRs previously in this file were split into documentation/adr/*.md per-file as part of Phase 0 of issue #593.

See documentation/adr/index.md for the index, or documentation/DESIGN_SYSTEM_BLUEPRINT.md for the blueprint that motivated this move.

All referenced ADRs (numbers 1-64) still exist under the new location. New ADRs are created from documentation/templates/TEMPLATE_adr.md and numbered continuing the sequence.