diff --git a/openspec/changes/fix-package-usage-paid-amount-cost-snapshot/.openspec.yaml b/openspec/changes/archive/2026-08-13-fix-package-usage-paid-amount-cost-snapshot/.openspec.yaml
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rename to openspec/changes/archive/2026-08-13-fix-package-usage-paid-amount-cost-snapshot/.openspec.yaml
diff --git a/openspec/changes/fix-package-usage-paid-amount-cost-snapshot/design.md b/openspec/changes/archive/2026-08-13-fix-package-usage-paid-amount-cost-snapshot/design.md
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rename from openspec/changes/fix-package-usage-paid-amount-cost-snapshot/design.md
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diff --git a/openspec/changes/fix-package-usage-paid-amount-cost-snapshot/proposal.md b/openspec/changes/archive/2026-08-13-fix-package-usage-paid-amount-cost-snapshot/proposal.md
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rename from openspec/changes/fix-package-usage-paid-amount-cost-snapshot/proposal.md
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diff --git a/openspec/changes/fix-package-usage-paid-amount-cost-snapshot/specs/package-lifecycle/spec.md b/openspec/changes/archive/2026-08-13-fix-package-usage-paid-amount-cost-snapshot/specs/package-lifecycle/spec.md
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rename from openspec/changes/fix-package-usage-paid-amount-cost-snapshot/specs/package-lifecycle/spec.md
rename to openspec/changes/archive/2026-08-13-fix-package-usage-paid-amount-cost-snapshot/specs/package-lifecycle/spec.md
diff --git a/openspec/changes/fix-package-usage-paid-amount-cost-snapshot/tasks.md b/openspec/changes/archive/2026-08-13-fix-package-usage-paid-amount-cost-snapshot/tasks.md
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rename from openspec/changes/fix-package-usage-paid-amount-cost-snapshot/tasks.md
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diff --git a/openspec/specs/package-lifecycle/spec.md b/openspec/specs/package-lifecycle/spec.md
index fbfda62..6e1a3b8 100644
--- a/openspec/specs/package-lifecycle/spec.md
+++ b/openspec/specs/package-lifecycle/spec.md
@@ -38,6 +38,25 @@
 - **WHEN** 操作者为已有系列授权添加套餐
 - **THEN** 系统返回同一店铺和系列的候选套餐及其授权状态，且不改变现有套餐管理提交接口的调价和删除语义
 
+### Requirement: 套餐使用记录价格快照
+
+系统 SHALL 在创建套餐使用记录时分别快照套餐成本价与零售价：`paid_amount`（成本价）SHALL 取订单 `seller_cost_price`（销售成本价，即卖家店铺向平台结算的成本），`retail_amount`（零售价）SHALL 取订单 `total_amount`（零售总价）。成本价与实付金额在个人客户场景下不相等时，`paid_amount` MUST 使用成本价而非实付金额。
+
+#### Scenario: 个人客户购买时快照成本价与零售价
+
+- **WHEN** 个人客户为资产购买套餐，店铺成本价 10900 分，零售价 15900 分，客户实付 15900 分
+- **THEN** 创建的套餐使用记录 `paid_amount = 10900`，`retail_amount = 15900`
+
+#### Scenario: 代理钱包自购时快照成本价与零售价
+
+- **WHEN** 代理以钱包支付为自有资产购买套餐，成本价 7000 分，零售价 9900 分
+- **THEN** 创建的套餐使用记录 `paid_amount = 7000`，`retail_amount = 9900`
+
+#### Scenario: 赠送套餐时快照零成本价与零售价
+
+- **WHEN** 平台赠送套餐，零售价 9900 分，成本价 0 分
+- **THEN** 创建的套餐使用记录 `paid_amount = 0`，`retail_amount = 9900`
+
 ## 可达操作索引
 
 本节只用于入口导航，不是行为 Requirement；业务义务以上述 Requirements 为准。