commerce: stacking precedence + best-price selection + backward query (16 tests) — Phase 2 done
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stack.sx — precedence as a separate selection layer, not in the rules.
Exclusivity = unordered code pairs; valid-stackings enumerates every legal
subset of applicable promos; best-stacking deterministically picks max total
discount (stable on ties); stacking-by-totalo answers "which legal stacking
yields total D?" backward. Member vs guest falls out of applicable-promos.
Completes Phase 2. Total 99/99 across 6 suites.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
2026-06-07 00:21:48 +00:00
parent 79fa28e55d
commit f71af498cf
6 changed files with 267 additions and 8 deletions

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@@ -9,4 +9,5 @@ _Generated by `lib/commerce/conformance.sh`_
| price | 20 | 0 | 20 |
| api | 12 | 0 | 12 |
| promo | 17 | 0 | 17 |
| **Total** | **83** | **0** | **83** |
| stack | 16 | 0 | 16 |
| **Total** | **99** | **0** | **99** |