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refactor(billing): 计费语义下沉到 Lua(内核只解 YAML/传数据)+ 采纳 PR #2 语义
按 issue #1 的修复方向(维护者评论):内核不再持有任何计费语义,billing 逻辑 全部在 `plugins/billing.lua`;内核只负责解 config.yaml、校验 schema、把 profile + 源 base_url 作为**数据**交给插件,再把插件算出的价目通过 `prices` 侧车注入。计费账目仍持久化在插件状态文件(`plugin_dir/.billing.state.json`)。 ## 变更 - **删除** `internal/billing`(compile.go 359 行 + 其 Go 测试); - 新增 `core.compileBillingPrices`:把 profile/sources JSON 化后调用插件导出 `compile_prices`,返回价目表 + 未匹配规则清单(供错误日志点名 URL); - `applyBillingDSL` / 规则编辑器改为走同一个插件编译入口(编辑器 lenient, 半成品规则可保存、可报告); - `billing.lua` 新增 `compile_prices`:URL 归一匹配、首条命中优先、 free/subscription/unpriced/token、USD/M→per-token、peak 窗口、 long_context 边际价、reasoning 可选价、default 策略、未匹配清单。 错误通过载荷 `error` 字段回传(插件导出第二返回值通道不可靠)。 ## 与 PR #2(valuelesser)合并后的语义 - **token 规则不产生任何源条目**:未列价的模型落到 unpriced 统计(可见), 不再"静默计 $0"。比 issue 正文里的 `{per_request:0}` 标记更收口; - `default: free` 由**编译期**给未匹配源写 `{per_request:0}` 标记; `unpriced`/缺省不写。删除无人读取的 `default_mode` 死键; - 保留 `unmatched_rules` 清单(只用于降级应用时点名过期 URL)。 ## 判据(原 Go 单测平移到 Lua + PR #2 的用例) - `internal/lua/billing_compile_test.go`:通配符不标记源、token 规则无源条目、 任意源条目不得携带 token 价(根因直防)、free/subscription 保留有意零价、 reasoning 缺席、long_context 三种形态、peak 形状、URL 归一+首条优先、 lenient 未匹配清单、硬错误 5 例、default 两态; - `internal/lua/billing_test.go`:编译输出驱动真实 priceFor 的 A/B 用例 (旧形状 cost=0 / 新形状 0.75 且 unpriced=0)、default 编译期语义 e2e; - `internal/gateway`:token 规则断言"无源条目"、模型价 per-token 量级; - `internal/core`:过期规则 URL 降级应用(有效规则仍生效)。
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@ -4,7 +4,6 @@ import (
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"encoding/json"
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"net/http"
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"llmsproxy/internal/billing"
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"llmsproxy/internal/config"
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)
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@ -238,7 +237,15 @@ func (g *Gateway) applyBillingDSLUpdate(w http.ResponseWriter, next *config.Bill
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// Compile before persisting: a profile that cannot be turned into prices
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// must not reach the config file, or the next restart fails to load the
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// very rules the editor just accepted.
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prices, err := billing.CompileOpts(next.Resolve(next.Active), cfg.Sources, true)
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//
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// The compilation itself runs in the BILLING PLUGIN (see
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// core.compileBillingPrices): the kernel only decodes config.yaml and passes
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// the profile + source URLs as data, so the "what does this rule mean"
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// semantics live in exactly one place. Editor saves are lenient: a
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// half-finished rule (URL typed before its source exists) must be saveable
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// and reported, not rejected with an error the operator can only resolve by
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// guessing.
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prices, _, err := g.core.CompileBillingPrices(next.Resolve(next.Active), true)
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if err != nil {
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cfg.BillingDSL = prev // no half-applied state
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writeError(w, http.StatusBadRequest, "compile_failed", err.Error())
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