refactor(proxy): remove format converters and enforce same-format routing

README.en.md

@@ -73,7 +73,7 @@ Register via this link to get started → <a href="https://co.yes.vg/register?re
 - 📊 **Real-time monitoring & analytics**: Dashboards, active sessions, consumption leaderboards, decision-chain tracing, and proxy health tracking provide second-level visibility.
 - 💰 **Price sheet management**: Paginated SQL queries with debounce search and LiteLLM sync keep thousands of model prices searchable in milliseconds.
 - 🔁 **Session management**: Five-minute context cache preserves decision trails, reduces vendor switches, and maintains full auditability.
-- 🔄 **OpenAI compatibility layer**: Supports `/v1/chat/completions`, handles format conversions, tool calls, reasoning fields, and Codex CLI instruction injection automatically.
+- 🔄 **OpenAI-compatible endpoint**: Supports `/v1/chat/completions` (OpenAI-compatible format), passes through tool calls and reasoning fields, enforces strict same-format routing with no cross-format conversion.
 
 ## ⚡️ Quick Start
 
@@ -217,7 +217,7 @@ Multi-provider pool (Claude / OpenAI / Gemini / others) + PostgreSQL + Redis
 2. **Context control**: `SessionManager` fetches the five-minute cache from Redis, enforces concurrency, and records the decision chain.
 3. **Rate limiting**: `RateLimitService` applies Lua-driven atomic counters for RPM, spend, and session caps, falling back gracefully if Redis is unavailable.
 4. **Routing**: `ProxyProviderResolver` scores vendors with weights, priorities, breaker states, and session reuse, retrying up to three times.
-5. **Forwarding & compatibility**: `ProxyForwarder` plus `ResponseTransformer` adapt Claude/OpenAI/Response formats, handle proxies, and honor model redirects.
+5. **Forwarding & response handling**: `ProxyForwarder` sends requests upstream; `ProxyResponseHandler` processes response streams while preserving endpoint-native formats, with proxy support and model redirects.
 6. **Observability**: Dashboards, leaderboards, and price sheets query PostgreSQL via repositories with hourly aggregations.
 
 ## 🚢 Deployment

README.md

@@ -73,7 +73,7 @@ PackyCode 为本软件的用户提供了特别优惠，使用此链接注册并
 - 📊 **实时监控与统计**：仪表盘、活跃 Session、消耗排行榜、决策链记录、代理状态追踪，秒级掌控运行态势。
 - 💰 **价格表管理**：分页查询 + SQL 优化，支持搜索防抖、LiteLLM 同步，千级模型也能快速检索。
 - 🔁 **Session 管理**：5 分钟上下文缓存，记录决策链，避免频繁切换供应商并保留全链路审计。
-- 🔄 **OpenAI 兼容层**：支持 `/v1/chat/completions`，自动格式转换、工具调用、reasoning 字段与 Codex CLI 指令注入。
+- 🔄 **OpenAI 兼容端点**：支持 `/v1/chat/completions`（OpenAI 兼容格式），工具调用与 reasoning 字段透传，严格同格式路由，无跨格式转换。
 
 ## ⚡️ 快速开始 Quick Start
 
@@ -220,7 +220,7 @@ Hono + Proxy Pipeline (认证 → Session 分配 → 限流 → 供应商选择
 2. **上下文管理**：`SessionManager` 从 Redis 读取 5 分钟缓存，控制并发并记录决策链。
 3. **限流**：`RateLimitService` 使用 Lua 脚本原子写入 RPM/金额/并发指标，Redis 不可用则 Fail-Open 降级。
 4. **调度**：`ProviderResolver` 根据权重、优先级、熔断状态与 Session 复用策略选择最佳供应商，至多 3 次重试。
-5. **转发与兼容**：`ProxyForwarder` + `ResponseTransformer` 适配 Claude/OpenAI/Response API，支持代理与模型重定向。
+5. **转发与响应处理**：`ProxyForwarder` 负责上游请求转发，`ProxyResponseHandler` 处理响应流并保留端点原生格式，支持代理与模型重定向。
 6. **监控**：日志、排行榜、价格表等 UI 通过 `repository` 查询 PostgreSQL，以小时级聚合呈现指标。
 
 ## 🚢 部署指南 Deployment

messages/en/settings/providers/form/sections.json

@@ -45,32 +45,6 @@
     "summary": "{failureThreshold} failures / {openDuration} min break / {successThreshold} successes to recover / {maxRetryAttempts} attempts per provider",
     "title": "Circuit Breaker"
   },
-  "codexStrategy": {
-    "desc": "Control how to handle the instructions field in Codex requests; affects gateway compatibility",
-    "hint": "Hint: Some strict Codex gateways (e.g. 88code, foxcode) require official instructions. Choose \"Auto\" or \"Force official\".",
-    "select": {
-      "auto": {
-        "desc": "Pass through client instructions; on 400 error, retry with official prompt",
-        "label": "Auto (recommended)"
-      },
-      "force": {
-        "desc": "Always use official Codex CLI instructions (~4000+ chars)",
-        "label": "Force official"
-      },
-      "keep": {
-        "desc": "Always pass through client instructions, no auto retry (for permissive gateways)",
-        "label": "Pass-through"
-      },
-      "label": "Strategy",
-      "placeholder": "Select a strategy"
-    },
-    "summary": {
-      "auto": "Auto (recommended)",
-      "force": "Force official",
-      "keep": "Pass-through"
-    },
-    "title": "Codex Instructions Policy"
-  },
   "mcpPassthrough": {
     "desc": "When enabled, pass through MCP tool calls to specified AI provider (e.g. minimax for image recognition, web search)",
     "hint": "Hint: MCP passthrough allows Claude Code client to use tool capabilities provided by third-party AI providers (e.g. image recognition, web search)",
@@ -196,6 +170,8 @@
       }
     },
     "codexOverrides": {
+      "title": "Codex Parameter Overrides",
+      "desc": "Override Codex (Responses API) request parameters at the provider level",
       "parallelToolCalls": {
         "help": "Controls whether parallel tool calls are allowed. \"inherit\" follows the client request. Disabling may reduce tool-call concurrency.",
         "label": "Parallel Tool Calls Override",
@@ -268,11 +244,6 @@
         "inherit": "Inherit (follow client request)"
       }
     },
-    "joinClaudePool": {
-      "desc": "When enabled, this provider will participate in load balancing with Claude-type providers",
-      "help": "Available only when there is a redirect mapping to claude-* models. When users request claude-* models, this provider also joins scheduling.",
-      "label": "Join Claude Routing Pool"
-    },
     "modelRedirects": {
       "label": "Model Redirects",
       "optional": "(optional)"

messages/en/settings/providers/form/strings.json

@@ -23,19 +23,6 @@
   "codexInstructionsDesc": "(determines scheduling policy)",
   "codexInstructionsForce": "Force Official",
   "codexInstructionsKeep": "Keep Original",
-  "codexStrategyAutoDesc": "Pass through client instructions, auto retry with official prompt on 400 error",
-  "codexStrategyAutoLabel": "Auto (Recommended)",
-  "codexStrategyConfig": "Codex Instructions Strategy",
-  "codexStrategyConfigAuto": "Auto (Recommended)",
-  "codexStrategyConfigForce": "Force Official",
-  "codexStrategyConfigKeep": "Keep Original",
-  "codexStrategyDesc": "Control how to handle Codex request instructions field, affects upstream gateway compatibility",
-  "codexStrategyForceDesc": "Always use official Codex CLI instructions (~4000+ chars)",
-  "codexStrategyForceLabel": "Force Official",
-  "codexStrategyHint": "Hint: Some strict Codex gateways (e.g. 88code, foxcode) require official instructions. Choose \"Auto\" or \"Force Official\" strategy",
-  "codexStrategyKeepDesc": "Always pass through client instructions, no auto retry (for lenient gateways)",
-  "codexStrategyKeepLabel": "Keep Original",
-  "codexStrategySelect": "Strategy Selection",
   "collapseAll": "Collapse All Advanced Configuration",
   "confirmAdd": "Confirm Add",
   "confirmAddPending": "Adding...",
@@ -57,9 +44,6 @@
   "filterProvider": "Filter by Provider Type",
   "group": "Group",
   "groupPlaceholder": "e.g. premium, economy",
-  "joinClaudePool": "Join Claude Scheduling Pool",
-  "joinClaudePoolDesc": "When enabled, this provider will participate in load balancing with Claude type providers",
-  "joinClaudePoolHelp": "Only available when model redirect config contains mappings to claude-* models. When enabled, this provider will also participate in scheduling when users request claude-* models.",
   "leaveEmpty": "Leave empty for unlimited",
   "limit0Means": "0 means unlimited",
   "limit5hLabel": "5-Hour Spending Limit (USD)",

messages/ja/settings/providers/form/sections.json

@@ -45,32 +45,6 @@
     "summary": "{failureThreshold} 回失敗 / {openDuration} 分間ブレーク / {successThreshold} 回成功で回復 / 各プロバイダー最大 {maxRetryAttempts} 回試行",
     "title": "サーキットブレーカー設定"
   },
-  "codexStrategy": {
-    "desc": "Codex リクエストの instructions フィールドの扱いを制御します。上流ゲートウェイとの互換性に影響します。",
-    "hint": "ヒント: 88code や foxcode など一部の厳格な Codex 中継では公式 instructions が必要です。「自動」または「公式を強制」を選択してください。",
-    "select": {
-      "auto": {
-        "desc": "クライアントの instructions を透過し、400 エラー時は公式プロンプトで自動再試行",
-        "label": "自動（推奨）"
-      },
-      "force": {
-        "desc": "常に公式の Codex CLI instructions を使用（約 4000+ 文字）",
-        "label": "公式を強制"
-      },
-      "keep": {
-        "desc": "常にクライアントの instructions を透過し、自動再試行しない（緩い中継向け）",
-        "label": "そのまま透過"
-      },
-      "label": "ポリシー選択",
-      "placeholder": "戦略を選択"
-    },
-    "summary": {
-      "auto": "自動（推奨）",
-      "force": "公式を強制",
-      "keep": "そのまま透過"
-    },
-    "title": "Codex Instructions ポリシー"
-  },
   "mcpPassthrough": {
     "desc": "有効にすると、MCP ツール呼び出しを指定された AI プロバイダにパススルーします（例：minimax の画像認識、Web 検索）",
     "hint": "ヒント: MCP パススルーにより、Claude Code クライアントは第三者の AI プロバイダー提供のツール機能（画像認識、Web 検索など）を使用できます",
@@ -197,6 +171,8 @@
       }
     },
     "codexOverrides": {
+      "title": "Codex パラメータオーバーライド",
+      "desc": "プロバイダーレベルで Codex (Responses API) リクエストパラメータをオーバーライド",
       "parallelToolCalls": {
         "help": "並列の tool calls を許可するかどうかを制御します。「クライアントに従う」は parallel_tool_calls を変更しません。無効化すると並列度が下がる可能性があります。",
         "label": "並列ツール呼び出しオーバーライド",
@@ -269,11 +245,6 @@
         "inherit": "継承（クライアントに従う）"
       }
     },
-    "joinClaudePool": {
-      "desc": "有効にすると、Claude 系のプロバイダーと共に負荷分散に参加します",
-      "help": "claude-* へのリダイレクトがある場合のみ利用できます。ユーザーが claude-* モデルを要求した際に本プロバイダーも選択対象になります。",
-      "label": "Claude ルーティングプールに参加"
-    },
     "modelRedirects": {
       "label": "モデルリダイレクト設定",
       "optional": "（任意）"

messages/ja/settings/providers/form/strings.json

@@ -23,19 +23,6 @@
   "codexInstructionsDesc": "(スケジューリング方針を決定)",
   "codexInstructionsForce": "公式を強制",
   "codexInstructionsKeep": "元の値を保持",
-  "codexStrategyAutoDesc": "クライアントの instructions を透過し、400 エラー時は公式プロンプトで自動リトライします",
-  "codexStrategyAutoLabel": "自動 (推奨)",
-  "codexStrategyConfig": "Codex Instructions 戦略",
-  "codexStrategyConfigAuto": "自動 (推奨)",
-  "codexStrategyConfigForce": "公式を強制",
-  "codexStrategyConfigKeep": "元の値を保持",
-  "codexStrategyDesc": "Codex リクエストの instructions フィールドの扱いを制御します。上流ゲートウェイとの互換性に影響します",
-  "codexStrategyForceDesc": "公式の Codex CLI instructions を常に使用します (約 4000+ 文字)",
-  "codexStrategyForceLabel": "公式を強制",
-  "codexStrategyHint": "ヒント: 一部の厳格な Codex ゲートウェイ (例: 88code, foxcode) では公式 instructions が必要です。\"自動\" または \"公式を強制\" を選択してください",
-  "codexStrategyKeepDesc": "クライアントの instructions を常に透過し、自動リトライしません (柔軟なゲートウェイ向け)",
-  "codexStrategyKeepLabel": "元の値を保持",
-  "codexStrategySelect": "戦略の選択",
   "collapseAll": "高度な設定をすべて折りたたむ",
   "confirmAdd": "追加を確認",
   "confirmAddPending": "追加中...",
@@ -57,9 +44,6 @@
   "filterProvider": "プロバイダータイプでフィルタ",
   "group": "グループ",
   "groupPlaceholder": "例：premium, economy",
-  "joinClaudePool": "Claude スケジューリングプールに参加",
-  "joinClaudePoolDesc": "有効にすると、このプロバイダーは Claude タイプのプロバイダーとともに負荷分散スケジューリングに参加します",
-  "joinClaudePoolHelp": "モデルリダイレクト設定に claude-* モデルへのマッピングが含まれる場合にのみ利用可能です。有効にすると、ユーザーが claude-* モデルを要求した際にも、このプロバイダーがスケジューリング対象になります。",
   "leaveEmpty": "無制限の場合は空のままにしてください",
   "limit0Means": "0は無制限を意味します",
   "limit5hLabel": "5時間支出上限 (USD)",

messages/providers-i18n-additions.json

@@ -68,9 +68,6 @@
         "modelRedirectsSourceRequired": "源模型名称不能为空",
         "modelRedirectsTargetRequired": "目标模型名称不能为空",
         "modelRedirectsExists": "模型 \"{model}\" 已存在重定向规则",
-        "joinClaudePool": "加入 Claude 调度池",
-        "joinClaudePoolDesc": "启用后，此供应商将与 Claude 类型供应商一起参与负载均衡调度",
-        "joinClaudePoolHelp": "仅当模型重定向配置中存在映射到 claude-* 模型时可用。启用后，当用户请求 claude-* 模型时，此供应商也会参与调度选择。",
         "modelWhitelist": "模型白名单",
         "modelWhitelistDesc": "限制此供应商可以处理的模型。默认情况下，供应商可以处理该类型下的所有模型。",
         "modelWhitelistLabel": "允许的模型",
@@ -155,19 +152,6 @@
         "proxyTestResultConnectionMethodProxy": "代理",
         "proxyTestResultConnectionMethodDirect": "直连",
         "proxyTestResultErrorType": "错误类型: {type}",
-        "codexStrategyConfig": "Codex Instructions 策略",
-        "codexStrategyConfigAuto": "自动 (推荐)",
-        "codexStrategyConfigForce": "强制官方",
-        "codexStrategyConfigKeep": "透传原样",
-        "codexStrategyDesc": "控制如何处理 Codex 请求的 instructions 字段，影响与上游中转站的兼容性",
-        "codexStrategySelect": "策略选择",
-        "codexStrategyAutoLabel": "自动 (推荐)",
-        "codexStrategyAutoDesc": "透传客户端 instructions，400 错误时自动重试官方 prompt",
-        "codexStrategyForceLabel": "强制官方",
-        "codexStrategyForceDesc": "始终使用官方 Codex CLI instructions（约 4000+ 字）",
-        "codexStrategyKeepLabel": "透传原样",
-        "codexStrategyKeepDesc": "始终透传客户端 instructions，不自动重试（适用于宽松中转站）",
-        "codexStrategyHint": "提示: 部分严格的 Codex 中转站（如 88code、foxcode）需要官方 instructions，选择\"自动\"或\"强制官方\"策略",
         "confirmAdd": "确认添加",
         "confirmUpdate": "确认更新",
         "confirmAddPending": "添加中...",
@@ -325,9 +309,6 @@
         "modelRedirectsSourceRequired": "Source model name cannot be empty",
         "modelRedirectsTargetRequired": "Target model name cannot be empty",
         "modelRedirectsExists": "Model \"{model}\" already has a redirect rule",
-        "joinClaudePool": "Join Claude Scheduling Pool",
-        "joinClaudePoolDesc": "When enabled, this provider will participate in load balancing with Claude type providers",
-        "joinClaudePoolHelp": "Only available when model redirect config contains mappings to claude-* models. When enabled, this provider will also participate in scheduling when users request claude-* models.",
         "modelWhitelist": "Model Whitelist",
         "modelWhitelistDesc": "Limit models this provider can handle. By default, provider can handle all models of its type.",
         "modelWhitelistLabel": "Allowed Models",
@@ -412,19 +393,6 @@
         "proxyTestResultConnectionMethodProxy": "Proxy",
         "proxyTestResultConnectionMethodDirect": "Direct",
         "proxyTestResultErrorType": "Error type: {type}",
-        "codexStrategyConfig": "Codex Instructions Strategy",
-        "codexStrategyConfigAuto": "Auto (Recommended)",
-        "codexStrategyConfigForce": "Force Official",
-        "codexStrategyConfigKeep": "Keep Original",
-        "codexStrategyDesc": "Control how to handle Codex request instructions field, affects upstream gateway compatibility",
-        "codexStrategySelect": "Strategy Selection",
-        "codexStrategyAutoLabel": "Auto (Recommended)",
-        "codexStrategyAutoDesc": "Pass through client instructions, auto retry with official prompt on 400 error",
-        "codexStrategyForceLabel": "Force Official",
-        "codexStrategyForceDesc": "Always use official Codex CLI instructions (~4000+ chars)",
-        "codexStrategyKeepLabel": "Keep Original",
-        "codexStrategyKeepDesc": "Always pass through client instructions, no auto retry (for lenient gateways)",
-        "codexStrategyHint": "Hint: Some strict Codex gateways (e.g. 88code, foxcode) require official instructions. Choose \"Auto\" or \"Force Official\" strategy",
         "confirmAdd": "Confirm Add",
         "confirmUpdate": "Confirm Update",
         "confirmAddPending": "Adding...",