Add the shared promotion-window EXCLUDE-constraint idea to the deferred designs
so the flash/group overlap ordering problem has a recorded structural fix.
Note in AGENTS.md that suite assertions must be scoped to fixtures the test
created, that a list endpoint warrants two consecutive green runs, and that a
piped test command hides the real exit code.
Capture exclusive promotion composition, empty-group cancel, and mall surface scope so the five marketing changes can be implemented without stacking or lifecycle ambiguity.
Co-authored-by: Cursor <cursoragent@cursor.com>
Persist the modular-monolith decision (ADR 0001 handler/service/repo,
ADR 0002 keep REST) with the companion tech spec and the api-architecture
OpenSpec capability. Replace the finished mock-migration tracker with
docs/TBD-marketing.md listing the backend-less marketing domains still on
fixtures (coupons, favorites, account stats, seckill, collective, integral,
reviews). README and AGENTS.md point at the new docs.
james
Chengdong ZhangandCursor