forked from EduCraft/curriculum-project-hub
docs: define SaaS capacity controls
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import Spec.Prelude
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/-!
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# Capacity —— SaaS capacity admission and abuse controls (ADR-0022)
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初始生产服务共享有限的单机资源,但不能让一个 Organization 垄断容量或让无界输入拖垮
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其他租户。ADR-0022 钉死分层限制、持久 admission、显式背压和紧急制动的领域语义;
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具体数值必须由生产式容量测试校准,因此保持 `OPEN`,不得把未经验证的数字冒充契约。
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-/
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namespace Spec.System
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/-- 首个生产版本必须有硬边界的容量维度(`PINNED`, ADR-0022)。金额与 token 用量是
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统计和软告警,不在本硬限制集合中;各维度的具体数值为 `OPEN`,须由容量测试决定。 -/
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inductive CapacityDimension where
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| requestRate
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| requestBodySize
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| agentConcurrency
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| admissionQueueLength
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| admissionQueueWait
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| fileSize
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| attachmentCount
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| archiveExpansion
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| projectStorage
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| organizationStorage
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| memberCount
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| projectCount
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| teamCount
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| folderCount
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| sessionCount
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| runWallTime
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| runTurns
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| runToolCalls
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| toolWallTime
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| runOutputSize
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| processMemory
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| processCpu
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| processCount
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/-- 一个容量维度的分层限制(`PINNED`, ADR-0022):platform ceiling 永远存在且不可被
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Organization 突破;Organization policy 可以缺省,也只能配置更低的限制。 -/
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structure LayeredLimit where
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/-- 由版本化生产部署配置提供的不可突破上限(`PINNED`, ADR-0022)。 -/
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platformCeiling : Nat
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/-- Organization 管理员可选的更低策略限制(`PINNED`, ADR-0022)。 -/
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organizationLimit : Option Nat
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/-- 分层限制是良构的 iff Organization policy 未设置或不高于 platform ceiling
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(`PINNED`, ADR-0022)。不允许用 `none` 表示 platform unlimited。 -/
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def LayeredLimit.Valid (limit : LayeredLimit) : Prop :=
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match limit.organizationLimit with
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| none => True
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| some organizationLimit => organizationLimit ≤ limit.platformCeiling
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/-- 有效限制(`PINNED`, ADR-0022)取 platform ceiling 与 Organization policy 中较低者;
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Organization policy 缺省时直接采用 platform ceiling,永不退化为 unlimited。 -/
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def LayeredLimit.effective (limit : LayeredLimit) : Nat :=
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match limit.organizationLimit with
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| none => limit.platformCeiling
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| some organizationLimit => min limit.platformCeiling organizationLimit
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/-- 已被服务接受的 agent run request 状态(`PINNED`, ADR-0022)。`expired` 和
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`canceled` 都是可审计终态且不得自动执行;`started` 表示已从 admission queue 移交给
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一个 AgentRun。被容量规则拒绝的输入从未被接受,因此不伪装成 queued request。 -/
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inductive RunRequestState where
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| queued
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| started
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| expired
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| canceled
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/-- 平台紧急工作负载制动模式(`PINNED`, ADR-0022)。`drain` 停止新 admission 与队列
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启动但允许当前 run 完成;`stopNow` 还会取消当前 run。它们不等同于删除或封禁 org。 -/
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inductive WorkloadBrakeMode where
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| open
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| drain
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| stopNow
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/-- 紧急制动是否允许接收新的 agent 工作(`PINNED`, ADR-0022):只有 `open` 允许。 -/
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def WorkloadBrakeMode.AcceptsNew : WorkloadBrakeMode → Prop
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| .open => True
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| .drain | .stopNow => False
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/-- 紧急制动是否允许当前 agent run 继续(`PINNED`, ADR-0022):`drain` 允许收尾,
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`stopNow` 要求取消。 -/
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def WorkloadBrakeMode.AllowsActive : WorkloadBrakeMode → Prop
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| .open | .drain => True
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| .stopNow => False
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end Spec.System
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