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…oves the line `add_to_cart` raised `KeyError` for an unknown id or a family, which the executor reports as an outage; it now raises `Unavailable`, naming the sellable variants for a family, as the contract describes. `SessionCarts.set_quantity` stored a line at quantity 0 or below (`CartItem` requires at least one); it now removes the line, which is also what the ticketing example does with a hold at zero.
SanHsien
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in SanHsien/commerce-agents
Sep 11, 2026
購物車與契約正確性修正：quantity 驗證走 argument-error 路徑而非 outage（#8）、 guardrails 拒絕超過兩位小數的價格（#10）、retail 購物車以 Unavailable 拒絕未知/ 有選項商品且 quantity<1 移除該行（#14）、stage_campaign 拒絕不存在的 campaign_id（#15）、travel 售完/不存在的 stay 不可加入購物車（#16）、 SoldOutError 改為契約的 Unavailable（#17）。全部 git apply --3way 乾淨套用， 每筆 PR 自帶的測試一併移植，逐一做過突變驗證。 docs/DIVERGENCE.md 新增 13 列登記，並更新既有 test_executor.py 一列（同時含 PR #9 與 #8 的測試）；tests/test_fork_divergence.py 釘死集合同步。 Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
SanHsien
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in SanHsien/commerce-agents
Sep 11, 2026
B 批六筆判決由「採納候選」改為「已採納（4dc206d）」，補後續移植紀錄段落， 格式沿用 A 批（#9、#25、#18）的做法。 Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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add_to_cartraisedKeyErrorfor an unknown id or a family, which the executorreports as an outage; it now raises
Unavailable, naming the sellable variantsfor a family, as the contract describes.
SessionCarts.set_quantitystored a lineat quantity 0 or below (
CartItemrequires at least one); it now removes the line,which is also what the ticketing example does with a hold at zero.
Found by running a conformance statement against the reference at
fd4d592; the test in this change fails without the fix and passes with it. The full suite,ruff check,ruff format --checkandscripts/check.pyare clean on this branch.