merge: sync release smoke fix from dev

feat: enhanced input validation, tool call resilience & performance

.github/workflows/release-artifacts.yml

@@ -47,7 +47,6 @@ jobs:
 
       - name: Release Blocking Gates
         run: |
-          ./tests/scripts/check-stage6-manual-smoke.sh
           ./tests/scripts/check-refactor-line-gate.sh
           ./tests/scripts/run-unit-all.sh
 

.gitignore

@@ -29,6 +29,7 @@ yarn.lock
 pnpm-lock.yaml
 
 # Build artifacts
+dist/
 *.tsbuildinfo
 .cache/
 .parcel-cache/

API.en.md

@@ -33,6 +33,8 @@ Docs: [Overview](README.en.md) / [Architecture](docs/ARCHITECTURE.en.md) / [Depl
 | Health probes | `GET /healthz`, `GET /readyz` |
 | CORS | Enabled (uniformly covers `/v1/*`, `/anthropic/*`, `/v1beta/models/*`, and `/admin/*`; echoes the browser `Origin` when present, otherwise `*`; default allow-list includes `Content-Type`, `Authorization`, `X-API-Key`, `X-Ds2-Target-Account`, `X-Ds2-Source`, `X-Vercel-Protection-Bypass`, `X-Goog-Api-Key`, `Anthropic-Version`, `Anthropic-Beta`, and also accepts third-party preflight-requested headers such as `x-stainless-*`; `/v1/chat/completions` on Vercel Node Runtime matches the same behavior; internal-only `X-Ds2-Internal-Token` remains blocked) |
 
+- All JSON request bodies must be valid UTF-8; malformed byte sequences are rejected on ingress with `400 invalid json`.
+
 ### 3.0 Adapter-Layer Notes
 
 - OpenAI / Claude / Gemini protocols are now mounted on one shared `chi` router tree assembled in `internal/server/router.go`.
@@ -81,7 +83,7 @@ Two header formats accepted:
 - Token is in `config.keys` → **Managed account mode**: DS2API auto-selects an account via rotation
 - Token is not in `config.keys` → **Direct token mode**: treated as a DeepSeek token directly
 
-**Optional header**: `X-Ds2-Target-Account: <email_or_mobile>` — Pin a specific managed account.
+**Optional header**: `X-Ds2-Target-Account: <email_or_mobile>` — Pin a specific managed account; if the target account does not exist or the managed-account queue is exhausted, the request returns `429`, and current responses do not include `Retry-After`. If the account exists but login/refresh fails, the request returns the underlying `401` or upstream error.
 Gemini-compatible clients can also send `x-goog-api-key`, `?key=`, or `?api_key=` as the caller credential source.
 
 ### Admin Endpoints (`/admin/*`)
@@ -165,6 +167,8 @@ Gemini-compatible clients can also send `x-goog-api-key`, `?key=`, or `?api_key=
 | PUT | `/admin/chat-history/settings` | Admin | Update conversation history retention limit |
 | GET | `/admin/version` | Admin | Check current version and latest Release |
 
+OpenAI `/v1/*` paths are canonical. For clients configured with the bare DS2API service URL, the same OpenAI handlers are also exposed through root shortcuts: `/models`, `/models/{id}`, `/chat/completions`, `/responses`, `/responses/{response_id}`, `/embeddings`, and `/files`.
+
 ---
 
 ## Health Endpoints
@@ -196,11 +200,15 @@ No auth required. Returns the currently supported DeepSeek native model list.
   "object": "list",
   "data": [
     {"id": "deepseek-v4-flash", "object": "model", "created": 1677610602, "owned_by": "deepseek", "permission": []},
+    {"id": "deepseek-v4-flash-nothinking", "object": "model", "created": 1677610602, "owned_by": "deepseek", "permission": []},
     {"id": "deepseek-v4-pro", "object": "model", "created": 1677610602, "owned_by": "deepseek", "permission": []},
+    {"id": "deepseek-v4-pro-nothinking", "object": "model", "created": 1677610602, "owned_by": "deepseek", "permission": []},
     {"id": "deepseek-v4-flash-search", "object": "model", "created": 1677610602, "owned_by": "deepseek", "permission": []},
+    {"id": "deepseek-v4-flash-search-nothinking", "object": "model", "created": 1677610602, "owned_by": "deepseek", "permission": []},
     {"id": "deepseek-v4-pro-search", "object": "model", "created": 1677610602, "owned_by": "deepseek", "permission": []},
+    {"id": "deepseek-v4-pro-search-nothinking", "object": "model", "created": 1677610602, "owned_by": "deepseek", "permission": []},
     {"id": "deepseek-v4-vision", "object": "model", "created": 1677610602, "owned_by": "deepseek", "permission": []},
-    {"id": "deepseek-v4-vision-search", "object": "model", "created": 1677610602, "owned_by": "deepseek", "permission": []}
+    {"id": "deepseek-v4-vision-nothinking", "object": "model", "created": 1677610602, "owned_by": "deepseek", "permission": []}
   ]
 }
 ```
@@ -224,6 +232,8 @@ Built-in aliases come from `internal/config/models.go`; `config.model_aliases` c
 - Gemini: `gemini-2.5-pro`, `gemini-2.5-flash`, `gemini-pro-vision`
 - Other compatibility families: `llama-*`, `qwen-*`, `mistral-*`, and `command-*` fall back through family heuristics
 
+Current vision support resolves only to `deepseek-v4-vision` and does not expose a separate `vision-search` variant.
+
 Retired historical families such as `claude-1.*`, `claude-2.*`, `claude-instant-*`, and `gpt-3.5*` are explicitly rejected.
 
 ### `POST /v1/chat/completions`
@@ -297,7 +307,7 @@ data: [DONE]
 - When thinking is enabled, the stream may emit `delta.reasoning_content`
 - Text emits `delta.content`
 - Last chunk includes `finish_reason` and `usage`
-- Token counting prefers pass-through from upstream DeepSeek SSE (`accumulated_token_usage` / `token_usage`), and only falls back to local estimation when upstream usage is absent
+- Token counting prefers pass-through from upstream DeepSeek SSE (`accumulated_token_usage` / `token_usage`), and only falls back to local estimation when upstream usage is absent. Failed/interrupted endings (for example `response.failed`) may not include `usage`
 
 #### Tool Calls
 
@@ -413,7 +423,7 @@ Business auth required. Returns OpenAI-compatible embeddings shape.
 | `model` | string | ✅ | Supports native models + alias mapping |
 | `input` | string/array | ✅ | Supports string, string array, token array |
 
-> Requires `embeddings.provider`. Current supported values: `mock` / `deterministic` / `builtin`. If missing/unsupported, returns standard error shape with HTTP 501.
+> Requires `embeddings.provider`. Current supported values: `mock` / `deterministic` / `builtin` (all three use the same local deterministic implementation). If missing/unsupported, returns standard error shape with HTTP 501.
 
 ### `POST /v1/files`
 
@@ -427,7 +437,7 @@ Business auth required. OpenAI Files-compatible upload endpoint; currently only
 Constraints and behavior:
 
 - `Content-Type` must be `multipart/form-data` (otherwise `400`).
-- Total request size limit is `100 MiB` (over-limit returns `413`).
+- Total request size limit is **100 MiB** (over-limit returns `413`).
 - Success returns an OpenAI `file` object (`id/object/bytes/filename/purpose/status`, etc.) and includes `account_id` for source-account tracing.
 
 ---
@@ -481,6 +491,13 @@ anthropic-version: 2023-06-01
 | `stream` | boolean | ❌ | Default `false` |
 | `system` | string | ❌ | Optional system prompt |
 | `tools` | array | ❌ | Claude tool schema |
+| `thinking` | object | ❌ | Anthropic thinking config; translated into downstream reasoning control, and ignored by `-nothinking` models |
+| `temperature` | number | ❌ | Passed through to the downstream bridge; if `temperature` and `top_p` are both present, `temperature` wins |
+| `top_p` | number | ❌ | Passed through when `temperature` is absent |
+| `stop_sequences` | array | ❌ | Passed through as downstream stop sequences |
+| `tool_choice` | string/object | ❌ | Supports `auto` / `none` / `required` / `{"type":"function","name":"..."}` and is translated to downstream tool choice |
+
+> Note: `thinking`, `temperature`, `top_p`, `stop_sequences`, and `tool_choice` are translated through the compatibility bridge. Final behavior still depends on the selected model and upstream support. When both `temperature` and `top_p` are present, `temperature` takes precedence.
 
 #### Non-Stream Response
 
@@ -917,12 +934,15 @@ Updates proxy binding for a specific account.
   "message": "API test successful (session creation only)",
   "model": "deepseek-v4-flash",
   "session_count": 0,
-  "config_writable": true
+  "config_writable": true,
+  "config_warning": ""
 }
 ```
 
 If a `message` is provided, `thinking` may also be included when the upstream response carries reasoning text.
 
+When the configured file path is not writable (for example, read-only `/app/config.json` inside some containers), login/session testing still proceeds; `config_warning` is returned to indicate token persistence failed and the token is memory-only until restart.
+
 ### `POST /admin/accounts/test-all`
 
 Optional request field: `model`.
@@ -1206,7 +1226,7 @@ Clients should handle HTTP status code plus `error` / `detail` fields.
 | Code | Meaning |
 | --- | --- |
 | `401` | Authentication failed (invalid key/token, or expired admin JWT) |
-| `429` | Too many requests (exceeded inflight + queue capacity) |
+| `429` | Too many requests (exceeded inflight + queue capacity; current responses do not include `Retry-After`) |
 | `503` | Model unavailable or upstream error |
 
 ---

API.md

@@ -33,6 +33,8 @@
 | 健康检查 | `GET /healthz`、`GET /readyz` |
 | CORS | 已启用（统一覆盖 `/v1/*`、`/anthropic/*`、`/v1beta/models/*`、`/admin/*`；浏览器有 `Origin` 时回显该 Origin，否则为 `*`；默认允许 `Content-Type`, `Authorization`, `X-API-Key`, `X-Ds2-Target-Account`, `X-Ds2-Source`, `X-Vercel-Protection-Bypass`, `X-Goog-Api-Key`, `Anthropic-Version`, `Anthropic-Beta`，并会放行预检里声明的第三方请求头，如 `x-stainless-*`；Vercel 上 `/v1/chat/completions` 的 Node Runtime 也对齐相同行为；内部专用头 `X-Ds2-Internal-Token` 仍被拦截） |
 
+- 所有 JSON 请求体都必须是合法 UTF-8；非法字节序列会在入站阶段被拒绝为 `400 invalid json`。
+
 ### 3.0 接口适配层说明
 
 - OpenAI / Claude / Gemini 三套协议已统一挂在同一 `chi` 路由树上，由 `internal/server/router.go` 负责装配。
@@ -81,7 +83,7 @@ Vercel 一键部署可先只填 `DS2API_ADMIN_KEY`，部署后在 `/admin` 导
 - token 在 `config.keys` 中 → **托管账号模式**，自动轮询选择账号
 - token 不在 `config.keys` 中 → **直通 token 模式**，直接作为 DeepSeek token 使用
 
-**可选请求头**：`X-Ds2-Target-Account: <email_or_mobile>` — 指定使用某个托管账号。
+**可选请求头**：`X-Ds2-Target-Account: <email_or_mobile>` — 指定使用某个托管账号；如果目标账号不存在，或管理账号队列已耗尽，相关业务请求会返回 `429`，当前不会附带 `Retry-After` 头。若账号存在但登录/刷新失败，则返回对应的 `401` 或上游错误。
 Gemini 兼容客户端还可以使用 `x-goog-api-key`、`?key=` 或 `?api_key=` 作为凭据来源。
 
 ### Admin 接口（`/admin/*`）
@@ -165,6 +167,8 @@ Gemini 兼容客户端还可以使用 `x-goog-api-key`、`?key=` 或 `?api_key=`
 | PUT | `/admin/chat-history/settings` | Admin | 更新对话记录保留条数 |
 | GET | `/admin/version` | Admin | 查询当前版本与最新 Release |
 
+OpenAI `/v1/*` 仍是规范路径。对于只配置 DS2API 根地址的客户端，同一套 OpenAI handler 也通过根路径快捷路由暴露：`/models`、`/models/{id}`、`/chat/completions`、`/responses`、`/responses/{response_id}`、`/embeddings`、`/files`。
+
 ---
 
 ## 健康检查
@@ -204,9 +208,7 @@ Gemini 兼容客户端还可以使用 `x-goog-api-key`、`?key=` 或 `?api_key=`
     {"id": "deepseek-v4-pro-search", "object": "model", "created": 1677610602, "owned_by": "deepseek", "permission": []},
     {"id": "deepseek-v4-pro-search-nothinking", "object": "model", "created": 1677610602, "owned_by": "deepseek", "permission": []},
     {"id": "deepseek-v4-vision", "object": "model", "created": 1677610602, "owned_by": "deepseek", "permission": []},
-    {"id": "deepseek-v4-vision-nothinking", "object": "model", "created": 1677610602, "owned_by": "deepseek", "permission": []},
-    {"id": "deepseek-v4-vision-search", "object": "model", "created": 1677610602, "owned_by": "deepseek", "permission": []},
-    {"id": "deepseek-v4-vision-search-nothinking", "object": "model", "created": 1677610602, "owned_by": "deepseek", "permission": []}
+    {"id": "deepseek-v4-vision-nothinking", "object": "model", "created": 1677610602, "owned_by": "deepseek", "permission": []}
   ]
 }
 ```
@@ -232,6 +234,7 @@ Gemini 兼容客户端还可以使用 `x-goog-api-key`、`?key=` 或 `?api_key=`
 - 其他兼容族：`llama-*`、`qwen-*`、`mistral-*`、`command-*` 会按家族启发式回退
 
 上述 alias 若在请求名后追加 `-nothinking` 后缀，也会映射到对应的强制关闭 thinking 版本。
+当前视觉能力仅对应 `deepseek-v4-vision` / `deepseek-v4-vision-nothinking`，不会解析出独立的 `vision-search` 变体。
 
 退役历史模型（如 `claude-1.*`、`claude-2.*`、`claude-instant-*`、`gpt-3.5*`）会被显式拒绝。
 
@@ -306,7 +309,7 @@ data: [DONE]
 - 开启 thinking 时会输出 `delta.reasoning_content`
 - 普通文本输出 `delta.content`
 - 最后一段包含 `finish_reason` 和 `usage`
-- token 计数优先透传上游 DeepSeek SSE（如 `accumulated_token_usage` / `token_usage`）；仅在上游缺失时回退本地估算
+- token 计数优先透传上游 DeepSeek SSE（如 `accumulated_token_usage` / `token_usage`）；仅在上游缺失时回退本地估算。失败/中断型结束（例如 `response.failed`）可能不会携带 `usage`
 
 #### Tool Calls
 
@@ -423,7 +426,7 @@ data: [DONE]
 | `model` | string | ✅ | 支持原生模型 + alias 自动映射 |
 | `input` | string/array | ✅ | 支持字符串、字符串数组、token 数组 |
 
-> 需配置 `embeddings.provider`。当前支持：`mock` / `deterministic` / `builtin`。未配置或不支持时返回标准错误结构（HTTP 501）。
+> 需配置 `embeddings.provider`。当前支持：`mock` / `deterministic` / `builtin`（三者都走同一套本地确定性实现）。未配置或不支持时返回标准错误结构（HTTP 501）。
 
 ### `POST /v1/files`
 
@@ -437,7 +440,7 @@ data: [DONE]
 约束与行为：
 
 - 请求必须为 `multipart/form-data`，否则返回 `400`。
-- 请求体总大小上限 `100 MiB`（超限返回 `413`）。
+- 请求体总大小上限 **100 MiB**（超限返回 `413`）。
 - 成功返回 OpenAI `file` 对象（`id/object/bytes/filename/purpose/status` 等字段），并附带 `account_id` 便于定位来源账号。
 
 ---
@@ -494,6 +497,13 @@ anthropic-version: 2023-06-01
 | `stream` | boolean | ❌ | 默认 `false` |
 | `system` | string | ❌ | 可选系统提示 |
 | `tools` | array | ❌ | Claude tool 定义 |
+| `thinking` | object | ❌ | Anthropic thinking 配置；会转译为下游 reasoning 控制，`-nothinking` 模型会忽略 |
+| `temperature` | number | ❌ | 透传到下游；若同时提供 `top_p`，以 `temperature` 为准 |
+| `top_p` | number | ❌ | 当未提供 `temperature` 时透传到下游 |
+| `stop_sequences` | array | ❌ | 透传到下游停用序列 |
+| `tool_choice` | string/object | ❌ | 支持 `auto` / `none` / `required` / `{"type":"function","name":"..."}`，并会转译为下游工具选择 |
+
+> 说明：上述 `thinking`、`temperature`、`top_p`、`stop_sequences`、`tool_choice` 都会走兼容层转译；最终是否生效仍取决于当前模型和上游能力。`temperature` 与 `top_p` 同时存在时，`temperature` 优先。
 
 #### 非流式响应
 
@@ -934,12 +944,15 @@ data: {"type":"message_stop"}
   "message": "API 测试成功（仅会话创建）",
   "model": "deepseek-v4-flash",
   "session_count": 0,
-  "config_writable": true
+  "config_writable": true,
+  "config_warning": ""
 }
 ```
 
 如果传入 `message`，还会附带 `thinking`（当上游返回思考内容时）。
 
+当部署环境配置文件路径不可写（例如容器内默认 `/app/config.json` 只读）时，登录与会话测试仍可继续；此时会返回 `config_warning` 提示 token 仅保存在内存、重启后丢失。
+
 ### `POST /admin/accounts/test-all`
 
 可选请求字段：`model`
@@ -1222,7 +1235,7 @@ Gemini 路由使用 Google 风格错误结构：
 | 状态码 | 说明 |
 | --- | --- |
 | `401` | 鉴权失败（key/token 无效，或 Admin JWT 过期） |
-| `429` | 请求过多（超出并发上限 + 等待队列） |
+| `429` | 请求过多（超出并发上限 + 等待队列；当前不附带 `Retry-After` 头） |
 | `503` | 模型不可用或上游服务异常 |
 
 ---

Dockerfile

@@ -28,6 +28,8 @@ FROM debian:bookworm-slim AS runtime-base
 WORKDIR /app
 RUN apt-get update \
     && apt-get install -y --no-install-recommends ca-certificates \
+    && groupadd -r ds2api && useradd -r -g ds2api -d /app -s /sbin/nologin ds2api \
+    && mkdir -p /app/data /data && chown -R ds2api:ds2api /app /data \
     && rm -rf /var/lib/apt/lists/*
 COPY --from=busybox-tools /bin/busybox /usr/local/bin/busybox
 EXPOSE 5001
@@ -36,8 +38,9 @@ CMD ["/usr/local/bin/ds2api"]
 FROM runtime-base AS runtime-from-source
 COPY --from=go-builder /out/ds2api /usr/local/bin/ds2api
 
-COPY --from=go-builder /app/config.example.json /app/config.example.json
-COPY --from=webui-builder /app/static/admin /app/static/admin
+COPY --from=go-builder --chown=ds2api:ds2api /app/config.example.json /app/config.example.json
+COPY --from=webui-builder --chown=ds2api:ds2api /app/static/admin /app/static/admin
+USER ds2api
 
 FROM busybox-tools AS dist-extract
 ARG TARGETARCH
@@ -60,7 +63,8 @@ RUN set -eux; \
 FROM runtime-base AS runtime-from-dist
 COPY --from=dist-extract /out/ds2api /usr/local/bin/ds2api
 
-COPY --from=dist-extract /out/config.example.json /app/config.example.json
-COPY --from=dist-extract /out/static/admin /app/static/admin
+COPY --from=dist-extract --chown=ds2api:ds2api /out/config.example.json /app/config.example.json
+COPY --from=dist-extract --chown=ds2api:ds2api /out/static/admin /app/static/admin
+USER ds2api
 
 FROM runtime-from-source AS final

README.MD

@@ -17,7 +17,7 @@
 
 语言 / Language: [中文](README.MD) | [English](README.en.md)
 
-将 DeepSeek Web 对话能力转换为 OpenAI、Claude 与 Gemini 兼容 API。后端为 **Go 全量实现**，前端为 React WebUI 管理台（源码在 `webui/`，部署时自动构建到 `static/admin`）。
+将 DeepSeek Web 对话能力转换为 OpenAI、Claude 与 Gemini 兼容 API。核心后端以 **Go** 实现，Vercel 流式桥接额外使用少量 Node Runtime，前端为 React WebUI 管理台（源码在 `webui/`，部署时自动构建到 `static/admin`）。
 
 文档入口：[文档导航](docs/README.md) / [架构说明](docs/ARCHITECTURE.md) / [接口文档](API.md)
 
@@ -31,6 +31,30 @@
 >
 > 请勿将本项目用于违反服务条款、协议、法律法规或平台规则的场景。商业使用前请自行确认 `LICENSE`、相关协议以及你是否获得了作者的书面许可。
 
+## 目录
+
+- [架构概览（摘要）](#架构概览摘要)
+- [核心能力](#核心能力)
+- [平台兼容矩阵](#平台兼容矩阵)
+- [模型支持](#模型支持)
+  - [OpenAI 接口](#openai-接口get-v1models)
+  - [Claude 接口](#claude-接口get-anthropicv1models)
+  - [Gemini 接口](#gemini-接口)
+- [快速开始](#快速开始)
+  - [方式一：下载 Release 构建包](#方式一下载-release-构建包)
+  - [方式二：Docker 运行](#方式二docker-运行)
+  - [方式三：Vercel 部署](#方式三vercel-部署)
+  - [方式四：本地源码运行](#方式四本地源码运行)
+- [配置说明](#配置说明)
+- [鉴权模式](#鉴权模式)
+- [并发模型](#并发模型)
+- [Tool Call 适配](#tool-call-适配)
+- [本地开发抓包工具](#本地开发抓包工具)
+- [文档索引](#文档索引)
+- [测试](#测试)
+- [Release 自动构建（GitHub Actions）](#release-自动构建github-actions)
+- [免责声明](#免责声明)
+
 ## 架构概览（摘要）
 
 ```mermaid
@@ -107,6 +131,8 @@ flowchart LR
 | WebUI 管理台 | `/admin` 单页应用（中英文双语、深色模式，支持查看服务器端对话记录） |
 | 运维探针 | `GET /healthz`（存活）、`GET /readyz`（就绪） |
 
+OpenAI `/v1/*` 仍是推荐的规范路径；同时支持 `/models`、`/chat/completions`、`/responses`、`/embeddings`、`/files` 等根路径快捷路由，方便只配置 DS2API 根地址的第三方客户端。
+
 ## 平台兼容矩阵
 
 | 级别 | 平台 | 当前状态 |
@@ -134,10 +160,9 @@ flowchart LR
 | expert | `deepseek-v4-pro-search-nothinking` | 永久关闭，不受请求参数影响 | ✅ |
 | vision | `deepseek-v4-vision` | 默认开启，可由请求参数控制 | ❌ |
 | vision | `deepseek-v4-vision-nothinking` | 永久关闭，不受请求参数影响 | ❌ |
-| vision | `deepseek-v4-vision-search` | 默认开启，可由请求参数控制 | ✅ |
-| vision | `deepseek-v4-vision-search-nothinking` | 永久关闭，不受请求参数影响 | ✅ |
 
 除原生模型外，也支持常见 alias 输入（如 `gpt-4.1`、`gpt-5`、`gpt-5-codex`、`o3`、`claude-*`、`gemini-*` 等），但 `/v1/models` 返回的是规范化后的 DeepSeek 原生模型 ID。若 alias 名本身追加 `-nothinking` 后缀，也会映射到对应的强制关思考模型。完整 alias 行为以 [API.md](API.md#模型-alias-解析策略) 和 `config.example.json` 为准。
+当前上游视觉模型只暴露 `vision` 通道，不提供独立的联网搜索视觉变体。
 
 ### Claude 接口（`GET /anthropic/v1/models`）
 
@@ -221,6 +246,8 @@ docker-compose logs -f
 ```
 
 默认 `docker-compose.yml` 会把宿主机 `6011` 映射到容器内的 `5001`。如果你希望直接对外暴露 `5001`，请设置 `DS2API_HOST_PORT=5001`（或者手动调整 `ports` 配置）。
+同时默认把 `./config.json` 挂载到容器 `/data/config.json`，并设置 `DS2API_CONFIG_PATH=/data/config.json`，用于避免 `/app` 只读导致运行时 token 持久化失败。
+镜像会预创建 `/data` 并授权给非 root 的 `ds2api` 用户；如果使用单文件 bind mount，请确保宿主机 `config.json` 对容器用户可读写，例如 `chmod 644 config.json`。
 
 更新镜像：`docker-compose up -d --build`
 
@@ -258,7 +285,7 @@ base64 < config.json | tr -d '\n'
 
 ### 方式四：本地源码运行
 
-**前置要求**：Go 1.26+，Node.js `20.19+` 或 `22.12+`（仅在需要构建 WebUI 时）
+**前置要求**：Go 1.26+，Node.js `20.19+` 或 `22.12+`（仅在需要构建 WebUI 时）；同时确保 `npm` 可用，建议 `npm 10+`
 
 ```bash
 # 1. 克隆仓库
@@ -277,7 +304,7 @@ go run ./cmd/ds2api
 
 服务实际绑定：`0.0.0.0:5001`，因此同一局域网设备通常也可以通过你的内网 IP 访问。
 
-> **WebUI 自动构建**：本地首次启动时，若 `static/admin` 不存在，会自动尝试执行 `npm ci`（仅在缺少依赖时）和 `npm run build -- --outDir static/admin --emptyOutDir`（需要本机有 Node.js）。你也可以手动构建：`./scripts/build-webui.sh`
+> **WebUI 自动构建**：本地首次启动时，若 `static/admin` 不存在，会自动尝试执行 `npm ci`（仅在缺少依赖时）和 `npm run build -- --outDir static/admin --emptyOutDir`（需要本机有 Node.js 和 npm）。你也可以手动构建：`./scripts/build-webui.sh`
 
 ## 配置说明
 
@@ -291,7 +318,7 @@ go run ./cmd/ds2api
 - `runtime`：账号并发、队列与 token 刷新策略，可通过 Admin Settings 热更新。
 - `auto_delete.mode`：请求结束后的远端会话清理策略，支持 `none` / `single` / `all`。
 - `history_split`：旧轮次拆分字段，已废弃并忽略，仅保留兼容旧配置。
-- `current_input_file`：唯一生效的独立拆分策略；默认开启且阈值为 `0`，触发时将完整上下文合并上传为隐藏上下文文件。
+- `current_input_file`：唯一生效的独立拆分策略；默认开启且阈值为 `0`，触发时将完整上下文合并上传为 `DS2API_HISTORY.txt` 上下文文件。
 - 如果关闭 `current_input_file`，请求会直接透传，不上传拆分上下文文件。
 - `thinking_injection`：默认开启；在最新 user 消息末尾追加思考增强提示词，提高高强度推理与工具调用前的思考稳定性；`prompt` 留空时使用内置默认提示词。
 
@@ -307,6 +334,7 @@ go run ./cmd/ds2api
 | **直通 token 模式** | 传入 token 不在 `config.keys` 中时，直接作为 DeepSeek token 使用 |
 
 可选请求头 `X-Ds2-Target-Account`：指定使用某个托管账号（值为 email 或 mobile）。
+如果指定账号不存在，或者当前管理账号队列已满，请求会返回 `429`；当前 `429` 不附带 `Retry-After` 头。若账号存在但登录/刷新失败，则返回对应的鉴权错误。
 Gemini 路由还可以使用 `x-goog-api-key`，或在没有认证头时使用 `?key=` / `?api_key=` 作为调用方凭据。
 
 ## 并发模型
@@ -319,7 +347,7 @@ Gemini 路由还可以使用 `x-goog-api-key`，或在没有认证头时使用 `
 ```
 
 - 当 in-flight 槽位满时，请求进入等待队列，**不会立即 429**
-- 超出总承载上限后才返回 `429 Too Many Requests`
+- 超出总承载上限后才返回 `429 Too Many Requests`，当前响应不附带 `Retry-After`
 - `GET /admin/queue/status` 返回实时并发状态
 
 ## Tool Call 适配
@@ -397,10 +425,10 @@ npm run build --prefix webui
 
 工作流文件：`.github/workflows/release-artifacts.yml`
 
-- **触发条件**：仅在 GitHub Release `published` 时触发（普通 push 不会触发）
-- **构建产物**：多平台二进制包（`linux/amd64`、`linux/arm64`、`linux/armv7`、`darwin/amd64`、`darwin/arm64`、`windows/amd64`、`windows/arm64`）+ `sha256sums.txt`
+- **触发条件**：默认仅在 GitHub Release `published` 时自动触发；也支持在 Actions 页面手动 `workflow_dispatch`，并填写 `release_tag` 复跑/补发
+- **构建产物**：多平台二进制包（`linux/amd64`、`linux/arm64`、`linux/armv7`、`darwin/amd64`、`darwin/arm64`、`windows/amd64`、`windows/arm64`）、Linux Docker 镜像导出包 + `sha256sums.txt`
 - **容器镜像发布**：仅推送到 GHCR（`ghcr.io/cjackhwang/ds2api`）
-- **每个压缩包包含**：`ds2api` 可执行文件、`static/admin`、WASM 文件（同时支持内置 fallback）、`config.example.json` 配置示例、README、LICENSE
+- **每个二进制压缩包包含**：`ds2api` 可执行文件、`static/admin`、`config.example.json`、`.env.example`、`README.MD`、`README.en.md`、`LICENSE`
 
 ## 免责声明
 

README.en.md

@@ -16,7 +16,7 @@
 
 Language: [中文](README.MD) | [English](README.en.md)
 
-DS2API converts DeepSeek Web chat capability into OpenAI-compatible, Claude-compatible, and Gemini-compatible APIs. The backend is a **pure Go implementation**, with a React WebUI admin panel (source in `webui/`, build output auto-generated to `static/admin` during deployment).
+DS2API converts DeepSeek Web chat capability into OpenAI-compatible, Claude-compatible, and Gemini-compatible APIs. The core backend is Go-based, with a small Node Runtime bridge used for Vercel streaming, and the React WebUI admin panel lives in `webui/` (build output auto-generated to `static/admin` during deployment).
 
 Documentation entry: [Docs Index](docs/README.md) / [Architecture](docs/ARCHITECTURE.en.md) / [API Reference](API.en.md)
 
@@ -28,6 +28,30 @@ Documentation entry: [Docs Index](docs/README.md) / [Architecture](docs/ARCHITEC
 >
 > Do not use this project in ways that violate service terms, agreements, laws, or platform rules. Before any commercial use, review the `LICENSE`, the relevant terms, and confirm that you have the author's written permission.
 
+## Table of Contents
+
+- [Architecture Overview (Summary)](#architecture-overview-summary)
+- [Key Capabilities](#key-capabilities)
+- [Platform Compatibility Matrix](#platform-compatibility-matrix)
+- [Model Support](#model-support)
+  - [OpenAI Endpoint](#openai-endpoint-get-v1models)
+  - [Claude Endpoint](#claude-endpoint-get-anthropicv1models)
+  - [Gemini Endpoint](#gemini-endpoint)
+- [Quick Start](#quick-start)
+  - [Option 1: Download Release Binaries](#option-1-download-release-binaries)
+  - [Option 2: Docker / GHCR](#option-2-docker--ghcr)
+  - [Option 3: Vercel](#option-3-vercel)
+  - [Option 4: Local Run](#option-4-local-run)
+- [Configuration](#configuration)
+- [Authentication Modes](#authentication-modes)
+- [Concurrency Model](#concurrency-model)
+- [Tool Call Adaptation](#tool-call-adaptation)
+- [Local Dev Packet Capture](#local-dev-packet-capture)
+- [Documentation Index](#documentation-index)
+- [Testing](#testing)
+- [Release Artifact Automation (GitHub Actions)](#release-artifact-automation-github-actions)
+- [Disclaimer](#disclaimer)
+
 ## Architecture Overview (Summary)
 
 ```mermaid
@@ -104,6 +128,8 @@ For the full module-by-module architecture and directory responsibilities, see [
 | WebUI Admin Panel | SPA at `/admin` (bilingual Chinese/English, dark mode, with server-side conversation history) |
 | Health Probes | `GET /healthz` (liveness), `GET /readyz` (readiness) |
 
+OpenAI `/v1/*` routes remain canonical, and DS2API also accepts root shortcuts such as `/models`, `/chat/completions`, `/responses`, `/embeddings`, and `/files` for clients configured with the bare service URL.
+
 ## Platform Compatibility Matrix
 
 | Tier | Platform | Status |
@@ -126,9 +152,9 @@ For the full module-by-module architecture and directory responsibilities, see [
 | default | `deepseek-v4-flash-search` | enabled by default, request-controlled | ✅ |
 | expert | `deepseek-v4-pro-search` | enabled by default, request-controlled | ✅ |
 | vision | `deepseek-v4-vision` | enabled by default, request-controlled | ❌ |
-| vision | `deepseek-v4-vision-search` | enabled by default, request-controlled | ✅ |
 
 Besides native IDs, DS2API also accepts common aliases as input (for example `gpt-4.1`, `gpt-5`, `gpt-5-codex`, `o3`, `claude-*`, `gemini-*`), but `/v1/models` returns normalized DeepSeek native model IDs. The complete alias behavior is documented in [API.en.md](API.en.md#model-alias-resolution) and `config.example.json`.
+Current upstream vision support exposes only the `vision` lane and does not provide a separate search-enabled vision variant.
 
 ### Claude Endpoint (`GET /anthropic/v1/models`)
 
@@ -209,6 +235,7 @@ docker-compose up -d
 ```
 
 The default `docker-compose.yml` uses `ghcr.io/cjackhwang/ds2api:latest` and maps host port `6011` to container port `5001`. If you want `5001` exposed directly, set `DS2API_HOST_PORT=5001` (or adjust the `ports` mapping).
+It also mounts `./config.json` to `/data/config.json` and sets `DS2API_CONFIG_PATH=/data/config.json` by default, which avoids runtime token persistence failures caused by read-only `/app`.
 
 Rebuild after updates: `docker-compose up -d --build`
 
@@ -279,7 +306,7 @@ Common fields:
 - `runtime`: account concurrency, queueing, and token refresh behavior, hot-reloadable via Admin Settings.
 - `auto_delete.mode`: remote session cleanup after each request, supporting `none` / `single` / `all`.
 - `history_split`: legacy multi-turn history split field, now ignored and kept only for backward-compatible config loading.
-- `current_input_file`: the only active split mode; it is enabled by default and uploads the full context as a hidden context file once the character threshold is reached.
+- `current_input_file`: the only active split mode; it is enabled by default and uploads the full context as a `DS2API_HISTORY.txt` context file once the character threshold is reached.
 - If you turn off `current_input_file`, requests pass through directly without uploading any split context file.
 
 For the full environment variable list, see [docs/DEPLOY.en.md](docs/DEPLOY.en.md). For auth behavior, see [API.en.md](API.en.md#authentication).
@@ -382,10 +409,10 @@ npm run build --prefix webui
 
 Workflow: `.github/workflows/release-artifacts.yml`
 
-- **Trigger**: only on GitHub Release `published` (normal pushes do not trigger builds)
-- **Outputs**: multi-platform archives (`linux/amd64`, `linux/arm64`, `linux/armv7`, `darwin/amd64`, `darwin/arm64`, `windows/amd64`, `windows/arm64`) + `sha256sums.txt`
+- **Trigger**: by default only on GitHub Release `published`; you can also run it manually via `workflow_dispatch` and pass `release_tag` to rerun / backfill
+- **Outputs**: multi-platform binary archives (`linux/amd64`, `linux/arm64`, `linux/armv7`, `darwin/amd64`, `darwin/arm64`, `windows/amd64`, `windows/arm64`), Linux Docker image export tarballs, and `sha256sums.txt`
 - **Container publishing**: GHCR only (`ghcr.io/cjackhwang/ds2api`)
-- **Each archive includes**: `ds2api` executable, `static/admin`, WASM file (with embedded fallback support), `config.example.json`-based config template, README, LICENSE
+- **Each binary archive includes**: the `ds2api` executable, `static/admin`, `config.example.json`, `.env.example`, `README.MD`, `README.en.md`, and `LICENSE`
 
 ## Disclaimer
 

VERSION

@@ -1 +1 @@
-4.1.2
+4.3.0

cmd/ds2api/main.go

@@ -35,8 +35,9 @@ func main() {
 	}
 
 	srv := &http.Server{
-		Addr:    "0.0.0.0:" + port,
-		Handler: app.Router,
+		Addr:              "0.0.0.0:" + port,
+		Handler:           app.Router,
+		ReadHeaderTimeout: 5 * time.Second,
 	}
 	localURL := fmt.Sprintf("http://127.0.0.1:%s", port)
 	lanIP := detectLANIPv4()

docker-compose.yml

@@ -9,8 +9,9 @@ services:
       # Host port is configurable via DS2API_HOST_PORT; container port stays fixed at 5001.
       - "${DS2API_HOST_PORT:-6011}:5001"
     volumes:
-      - ./config.json:/app/config.json    # 配置文件
+      - ./config.json:/data/config.json   # 配置文件（持久化推荐路径）
     environment:
       - TZ=Asia/Shanghai
       - LOG_LEVEL=INFO
       - DS2API_ADMIN_KEY=${DS2API_ADMIN_KEY:-ds2api}
+      - DS2API_CONFIG_PATH=/data/config.json

docs/CONTRIBUTING.en.md

@@ -36,7 +36,7 @@ go run ./cmd/ds2api
 cd webui
 
 # 2. Install dependencies
-npm install
+npm ci
 
 # 3. Start dev server (hot reload)
 npm run dev

docs/CONTRIBUTING.md

@@ -36,7 +36,7 @@ go run ./cmd/ds2api
 cd webui
 
 # 2. 安装依赖
-npm install
+npm ci
 
 # 3. 启动开发服务器（热更新）
 npm run dev

docs/DEPLOY.en.md

@@ -64,8 +64,8 @@ Use `config.json` as the single source of truth:
 
 Built-in GitHub Actions workflow: `.github/workflows/release-artifacts.yml`
 
-- **Trigger**: only on Release `published` (no build on normal push)
-- **Outputs**: multi-platform binary archives + `sha256sums.txt`
+- **Trigger**: by default only on Release `published`; you can also run it manually via `workflow_dispatch` and pass `release_tag` to rerun / backfill
+- **Outputs**: multi-platform binary archives, Linux Docker image export tarballs, and `sha256sums.txt`
 - **Container publishing**: GHCR only (`ghcr.io/cjackhwang/ds2api`)
 
 | Platform | Architecture | Format |
@@ -130,6 +130,9 @@ docker-compose logs -f
 ```
 
 The default `docker-compose.yml` directly uses `ghcr.io/cjackhwang/ds2api:latest` and maps host port `6011` to container port `5001`. If you want `5001` exposed directly, set `DS2API_HOST_PORT=5001` (or adjust the `ports` mapping).
+The compose template also defaults to `DS2API_CONFIG_PATH=/data/config.json` with `./config.json:/data/config.json` mounted, so deployments avoid read-only `/app` persistence issues by default.
+The image pre-creates `/data` and grants it to the non-root `ds2api` user. If you bind-mount a single host file, make sure `config.json` is readable/writable by the container user, for example with `chmod 644 config.json`; otherwise Linux UID/GID mismatches can still cause `open /data/config.json: permission denied`.
+Compatibility note: when `DS2API_CONFIG_PATH` is unset and runtime base dir is `/app`, newer versions prefer `/data/config.json`; if that file is missing but legacy `/app/config.json` exists, DS2API automatically falls back to the legacy path to avoid post-upgrade config loss.
 
 If you want a pinned version instead of `latest`, you can also pull a specific tag directly:
 
@@ -195,6 +198,11 @@ Notes:
 
 - **Port**: DS2API listens on `5001` by default; the template sets `PORT=5001`.
 - **Persistent config**: the template mounts `/data` and sets `DS2API_CONFIG_PATH=/data/config.json`. After importing config in Admin UI, it will be written and persisted to this path.
+- **`open /app/config.json: permission denied`**: this means the instance is trying to persist runtime tokens to a read-only path (commonly `/app` inside the image).  
+  Recommended handling:
+  1. Set a writable path explicitly: `DS2API_CONFIG_PATH=/data/config.json` (and mount a persistent volume at `/data`);
+  2. If you bootstrap with `DS2API_CONFIG_JSON` and do not need runtime writeback, keep env-backed mode (`DS2API_ENV_WRITEBACK` disabled);
+  3. In current versions, login/session tests continue even if persistence fails; Admin API returns a warning that token persistence failed and token is memory-only until restart.
 - **Build version**: Zeabur / regular `docker build` does not require `BUILD_VERSION` by default. The image prefers that build arg when provided, and automatically falls back to the repo-root `VERSION` file when it is absent.
 - **First login**: after deployment, open `/admin` and login with `DS2API_ADMIN_KEY` shown in Zeabur env/template instructions (recommended: rotate to a strong secret after first login).
 
@@ -263,6 +271,7 @@ VERCEL_TEAM_ID=team_xxxxxxxxxxxx   # optional for personal accounts
 | `VERCEL_TOKEN` | Vercel sync token | — |
 | `VERCEL_PROJECT_ID` | Vercel project ID | — |
 | `VERCEL_TEAM_ID` | Vercel team ID | — |
+| `DS2API_CHAT_HISTORY_PATH` | Chat history storage path (must be set to `/tmp/chat_history.json` on Vercel, otherwise unavailable due to read-only filesystem) | `data/chat_history.json` |
 | `DS2API_VERCEL_PROTECTION_BYPASS` | Deployment protection bypass for internal Node→Go calls | — |
 
 ### 3.4 Vercel Architecture
@@ -352,6 +361,22 @@ If API responses return Vercel HTML `Authentication Required`:
 - **Option B**: Add `x-vercel-protection-bypass` header to requests
 - **Option C**: Set `VERCEL_AUTOMATION_BYPASS_SECRET` (or `DS2API_VERCEL_PROTECTION_BYPASS`) for internal Node→Go calls
 
+#### Chat History Unavailable (read-only file system)
+
+```text
+create chat history dir: mkdir /var/task/data: read-only file system
+```
+
+**Cause**: Vercel Serverless functions have a read-only filesystem (`/var/task`). Chat history fails because it cannot create directories there.
+
+**Fix**: Add the following in Vercel Project Settings → Environment Variables:
+
+```text
+DS2API_CHAT_HISTORY_PATH=/tmp/chat_history.json
+```
+
+`/tmp` is the only writable directory in Vercel Serverless. Data is ephemeral (not persisted across cold starts), but the feature works within a single instance lifetime.
+
 ### 3.6 Build Artifacts Not Committed
 
 - `static/admin` directory is not in Git
@@ -394,7 +419,7 @@ Or step by step:
 
 ```bash
 cd webui
-npm install
+npm ci
 npm run build
 # Output goes to static/admin/
 ```

docs/DEPLOY.md

@@ -64,8 +64,8 @@ cp config.example.json config.json
 
 仓库内置 GitHub Actions 工作流：`.github/workflows/release-artifacts.yml`
 
-- **触发条件**：仅在 Release `published` 时触发（普通 push 不会构建）
-- **构建产物**：多平台二进制压缩包 + `sha256sums.txt`
+- **触发条件**：默认仅在 Release `published` 时自动触发；也支持在 Actions 页面手动 `workflow_dispatch`，并填写 `release_tag` 复跑/补发
+- **构建产物**：多平台二进制压缩包、Linux Docker 镜像导出包 + `sha256sums.txt`
 - **容器镜像发布**：仅发布到 GHCR（`ghcr.io/cjackhwang/ds2api`）
 
 | 平台 | 架构 | 文件格式 |
@@ -130,6 +130,9 @@ docker-compose logs -f
 ```
 
 默认 `docker-compose.yml` 直接使用 `ghcr.io/cjackhwang/ds2api:latest`，并把宿主机 `6011` 映射到容器内的 `5001`。如果你希望直接对外暴露 `5001`，请设置 `DS2API_HOST_PORT=5001`（或者手动调整 `ports` 配置）。
+Compose 模板还会默认设置 `DS2API_CONFIG_PATH=/data/config.json` 并挂载 `./config.json:/data/config.json`，优先避免 `/app` 只读带来的配置持久化问题。
+镜像内会预创建 `/data` 并授权给非 root 的 `ds2api` 用户；如果你使用 bind mount 单文件，请确保宿主机 `config.json` 至少可被容器用户读取/写入，例如 `chmod 644 config.json`，否则 Linux UID/GID 不一致时仍可能出现 `open /data/config.json: permission denied`。
+兼容说明：若未设置 `DS2API_CONFIG_PATH` 且运行目录是 `/app`，新版本会优先使用 `/data/config.json`；当该文件不存在但检测到历史 `/app/config.json` 时，会自动回退读取旧路径，避免升级后“配置丢失”。
 
 如需固定版本，也可以直接拉取指定 tag：
 
@@ -195,6 +198,11 @@ healthcheck:
 
 - **端口**：服务默认监听 `5001`，模板会固定设置 `PORT=5001`。
 - **配置持久化**：模板挂载卷 `/data`，并设置 `DS2API_CONFIG_PATH=/data/config.json`；在管理台导入配置后，会写入并持久化到该路径。
+- **`open /app/config.json: permission denied`**：说明当前实例在尝试把运行时 token 持久化到只读路径（常见于镜像内 `/app`）。  
+  处理建议：
+  1. 显式设置可写路径：`DS2API_CONFIG_PATH=/data/config.json`（并挂载持久卷到 `/data`）；  
+  2. 若你使用 `DS2API_CONFIG_JSON` 启动且不需要运行时落盘，可保持环境变量模式（`DS2API_ENV_WRITEBACK` 关闭）；  
+  3. 最新版本中，即使持久化失败，登录/会话测试仍会继续，仅提示“token 未持久化（重启后丢失）”。
 - **构建版本号**：Zeabur / 普通 `docker build` 默认不需要传 `BUILD_VERSION`；镜像会优先使用该构建参数，未提供时自动回退到仓库根目录的 `VERSION` 文件。
 - **首次登录**：部署完成后访问 `/admin`，使用 Zeabur 环境变量/模板指引中的 `DS2API_ADMIN_KEY` 登录（建议首次登录后自行更换为强密码）。
 
@@ -263,6 +271,7 @@ VERCEL_TEAM_ID=team_xxxxxxxxxxxx   # 个人账号可留空
 | `VERCEL_TOKEN` | Vercel 同步 token | — |
 | `VERCEL_PROJECT_ID` | Vercel 项目 ID | — |
 | `VERCEL_TEAM_ID` | Vercel 团队 ID | — |
+| `DS2API_CHAT_HISTORY_PATH` | Chat history 存储路径（Vercel 上必须设为 `/tmp/chat_history.json`，否则因文件系统只读而不可用） | `data/chat_history.json` |
 | `DS2API_VERCEL_PROTECTION_BYPASS` | 部署保护绕过密钥（内部 Node→Go 调用） | — |
 
 ### 3.3 运行时行为配置（通过 Admin API 设置）
@@ -362,6 +371,22 @@ No Output Directory named "public" found after the Build completed.
 - **方案 B**：请求中添加 `x-vercel-protection-bypass` 头
 - **方案 C**：设置 `VERCEL_AUTOMATION_BYPASS_SECRET`（或 `DS2API_VERCEL_PROTECTION_BYPASS`），仅影响内部 Node→Go 调用
 
+#### Chat History 不可用（read-only file system）
+
+```text
+create chat history dir: mkdir /var/task/data: read-only file system
+```
+
+**原因**：Vercel Serverless 函数的文件系统（`/var/task`）为只读，chat history 尝试在该路径下创建目录失败。
+
+**解决**：在 Vercel Project Settings → Environment Variables 中添加：
+
+```text
+DS2API_CHAT_HISTORY_PATH=/tmp/chat_history.json
+```
+
+`/tmp` 是 Vercel Serverless 环境中唯一可写的目录。数据在函数冷启动之间不会持久化（ephemeral），但在单个实例生命周期内功能正常。
+
 ### 3.6 仓库不提交构建产物
 
 - `static/admin` 目录不在 Git 中
@@ -404,7 +429,7 @@ go run ./cmd/ds2api
 
 ```bash
 cd webui
-npm install
+npm ci
 npm run build
 # 产物输出到 static/admin/
 ```

docs/DeepSeekSSE行为结构说明-2026-04-05.md

@@ -309,7 +309,18 @@ parse SSE block
 - 新模型可能增加新的 `p` 路径。
 - 新版本可能增加新的 fragment.type。
 - `CONTENT_FILTER` 的终态模板内容可能变化。
-- 自动续写相关状态（如 `INCOMPLETE` / `AUTO_CONTINUE`）当前主要来自实测与实现兼容逻辑，后续字段形态仍可能变化。
+- 自动续写相关状态（如 `INCOMPLETE` / `AUTO_CONTINUE`）当前主要来自实测与实现兼容逻辑，后续字段形态仍可能变化。当前实现不会仅因早期 `WIP` 状态就自动继续；只有显式 `INCOMPLETE` 或 `auto_continue` 信号才会触发 continue。
 - 解析器应当对未知字段、未知路径、未知事件保持容忍。
 
 如果你要把这份说明用于实际开发，建议同时保留原始流样本、回放脚本和回归测试，不要只依赖本文。
+
+## 2026-04-29 最近线上样本增量观察
+
+基于 `longtext-deepseek-v4-flash-20260429` 与 `longtext-deepseek-v4-pro-20260429` 两个真实账号长文本样本，近期格式变化要点如下：
+
+1. `data:` 事件中仍大量出现 `{"v":"..."}` 的无路径增量（`p` 缺失），解析器必须把空路径视为可见正文候选，而不能只依赖 `response/content`。
+2. 对象形态 `v`（如 `{"text":"..."}` / `{"content":"..."}`）仍会出现，且可能与无路径 chunk 混用；仅按字符串处理会导致正文丢块。
+3. 多轮 continuation 场景下，后续 chunk 可能不再重复显式 `status`，状态机需要保留上一轮 `INCOMPLETE` 语义直到出现终态。
+4. 2026-04-29 起客户端头部版本基线上调到 `x-client-version: 2.0.3`，否则部分账号会出现上游行为不一致（包括空输出与补轮异常）。
+
+建议：新增样本默认回放应优先覆盖「长文本 + 多轮 + 无路径 chunk」组合，避免只用短样本导致回归漏检。

docs/README.md

@@ -22,7 +22,7 @@
 
 ### 文档维护约定
 
-- 文档更新必须以实际代码实现为依据：总路由装配看 `internal/server/router.go`，协议/resource 路由看 `internal/httpapi/*/**/routes.go` 与 `internal/httpapi/admin/handler.go`，配置默认值看 `internal/config/*`，模型/alias 看 `internal/config/models.go`，prompt 兼容链路看 `docs/prompt-compatibility.md` 列出的代码入口。
+- 文档更新必须以实际代码实现为依据：总路由装配看 `internal/server/router.go`，协议/resource 路由看 `internal/httpapi/**/handler*.go` 与 `internal/httpapi/admin/handler.go`，配置默认值看 `internal/config/*`，模型/alias 看 `internal/config/models.go`，prompt 兼容链路看 `docs/prompt-compatibility.md` 列出的代码入口。
 - `README.MD` / `README.en.md`：面向首次接触用户，保留“是什么 + 怎么快速跑起来”。
 - `docs/ARCHITECTURE*.md`：面向开发者，集中维护项目结构、模块职责与调用链。
 - `API*.md`：面向客户端接入者，聚焦接口行为、鉴权和示例。
@@ -53,7 +53,7 @@ Recommended reading order:
 
 ### Maintenance conventions
 
-- Documentation updates must be grounded in the actual implementation: root routing lives in `internal/server/router.go`, protocol/resource routes live in `internal/httpapi/*/**/routes.go` and `internal/httpapi/admin/handler.go`, config defaults in `internal/config/*`, models/aliases in `internal/config/models.go`, and the prompt compatibility pipeline in the code entrypoints listed by `docs/prompt-compatibility.md`.
+- Documentation updates must be grounded in the actual implementation: root routing lives in `internal/server/router.go`, protocol/resource routes live in `internal/httpapi/**/handler*.go` and `internal/httpapi/admin/handler.go`, config defaults in `internal/config/*`, models/aliases in `internal/config/models.go`, and the prompt compatibility pipeline in the code entrypoints listed by `docs/prompt-compatibility.md`.
 - `README.MD` / `README.en.md`: onboarding-oriented (“what + quick start”).
 - `docs/ARCHITECTURE*.md`: developer-oriented source of truth for module boundaries and execution flow.
 - `API*.md`: integration-oriented behavior/contracts.

docs/TESTING.md

@@ -60,11 +60,10 @@ npm run build --prefix webui
 ./tests/scripts/check-refactor-line-gate.sh
 ./tests/scripts/check-node-split-syntax.sh
 ./tests/scripts/check-cross-build.sh
-
-# 历史阶段门禁：阶段 6 手工烟测签字检查（默认读取 plans/stage6-manual-smoke.md）
-./tests/scripts/check-stage6-manual-smoke.sh
 ```
 
+说明：`plans/stage6-manual-smoke.md` 已移除，阶段 6 手工烟测不再作为当前 CI 或发布门禁。
+
 ### 端到端测试 | End-to-End Tests
 
 ```bash

docs/prompt-compatibility.md

@@ -98,13 +98,16 @@ DS2API 当前的核心思路，不是把客户端传来的 `messages`、`tools`
 - `prompt` 才是对话上下文主载体。
 - `ref_file_ids` 只承载文件引用，不承载普通文本消息。
 - `tools` 不会作为“原生工具 schema”直接下发给下游，而是被改写进 `prompt`。
+- 对外返回给客户端的 `prompt_tokens` / `input_tokens` / `promptTokenCount` 不再按“最后一条消息”或字符粗估近似返回，而是基于**完整上下文 prompt**做 tokenizer 计数；为了避免上下文实际超限但客户端误以为还能塞下，请求侧上下文 token 会额外保守上浮一点，宁可略大也不低估。
 - 当前 `/v1/chat/completions` 业务路径仍是“每次请求新建一个远端 `chat_session_id`，并默认发送 `parent_message_id: null`”；因此 DS2API 对外默认表现为“新会话 + prompt 拼历史”，而不是复用 DeepSeek 原生会话树。
 - 但 DeepSeek 远端本身支持同一 `chat_session_id` 的跨轮次持续对话。2026-04-27 已用项目内现有 DeepSeek client 做过一次不改业务代码的双轮实测：同一 `chat_session_id` 下，第 1 轮返回 `request_message_id=1` / `response_message_id=2` / 文本 `SESSION_TEST_ONE`；第 2 轮重新获取一次 PoW，并发送 `parent_message_id=2` 后，成功返回 `request_message_id=3` / `response_message_id=4` / 文本 `SESSION_TEST_TWO`。这说明“同远端会话持续聊天”能力存在，且每轮需要携带正确的 parent/message 链接信息，同时重新获取对应轮次可用的 PoW。
 - OpenAI Chat / Responses 原生走统一 OpenAI 标准化与 DeepSeek payload 组装；Claude / Gemini 会尽量复用 OpenAI prompt/tool 语义，其中 Gemini 直接复用 `promptcompat.BuildOpenAIPromptForAdapter`，Claude 消息接口在可代理场景会转换为 OpenAI chat 形态再执行。
 - 客户端传入的 thinking / reasoning 开关会被归一到下游 `thinking_enabled`。Gemini `generationConfig.thinkingConfig.thinkingBudget` 会翻译成同一套 thinking 开关；关闭时即使上游返回 `response/thinking_content`，兼容层也不会把它当作可见正文输出。若最终解析出的模型名带 `-nothinking` 后缀，则会无条件强制关闭 thinking，优先级高于请求体中的 `thinking` / `reasoning` / `reasoning_effort`。Claude surface 在流式请求且未显式声明 `thinking` 时，仍按 Anthropic 语义默认关闭；但在非流式代理场景，兼容层会内部开启一次下游 thinking，用于捕获“正文为空、工具调用落在 thinking 里”的情况，随后在回包前剥离用户不可见的 thinking block。
-- 对 OpenAI Chat / Responses 的非流式收尾，如果最终可见正文为空，兼容层会优先尝试把思维链中的独立 DSML / XML 工具块当作真实工具调用解析出来。流式链路也会在收尾阶段做同样的 fallback 检测，但不会因为思维链内容去中途拦截或改写流式输出；thinking / reasoning 增量仍按原样先发，只有在结束收尾时才可能补发最终工具调用结果。补发结果会作为本轮 assistant 的结构化 `tool_calls` / `function_call` 输出返回，而不是塞进 `content` 文本；如果客户端没有开启 thinking / reasoning，思维链只用于检测，不会作为 `reasoning_content` 或可见正文暴露。只有正文为空且思维链里也没有可执行工具调用时，才继续按空回复错误处理。
+- 对 OpenAI Chat / Responses 的非流式收尾，如果最终可见正文为空，兼容层会优先尝试把思维链中的独立 DSML / XML 工具块当作真实工具调用解析出来。流式链路也会在收尾阶段做同样的 fallback 检测，但不会因为思维链内容去中途拦截或改写流式输出；真正的工具识别始终基于原始上游文本，而不是基于“已经做过可见输出清洗”的版本，因此即使最终可见层会剥离完整 leaked DSML / XML `tool_calls` wrapper、并抑制全空参数或无效 wrapper 块，也不会影响真实工具调用转成结构化 `tool_calls` / `function_call`。补发结果会作为本轮 assistant 的结构化 `tool_calls` / `function_call` 输出返回，而不是塞进 `content` 文本；如果客户端没有开启 thinking / reasoning，思维链只用于检测，不会作为 `reasoning_content` 或可见正文暴露。只有正文为空且思维链里也没有可执行工具调用时，才继续按空回复错误处理。
 - OpenAI Chat / Responses 的空回复错误处理之前会默认做一次内部补偿重试：第一次上游完整结束后，如果最终可见正文为空、没有解析到工具调用、也没有已经向客户端流式发出工具调用，并且终止原因不是 `content_filter`，兼容层会复用同一个 `chat_session_id`、账号、token 与工具策略，把原始 completion `prompt` 追加固定后缀 `Previous reply had no visible output. Please regenerate the visible final answer or tool call now.` 后重新提交一次。重试遵循 DeepSeek 多轮对话协议：从第一次上游 SSE 流中提取 `response_message_id`，并在重试 payload 中设置 `parent_message_id` 为该值，使重试成为同一会话的后续轮次而非断裂的根消息；同时重新获取一次 PoW（若 PoW 获取失败则回退到原始 PoW）。该重试不会重新标准化消息、不会新建 session、不会切换账号，也不会向流式客户端插入重试标记；第二次 thinking / reasoning 会按正常增量直接接到第一次之后，并继续使用 overlap trim 去重。若第二次仍为空，终端错误码仍保持现有 `upstream_empty_output`；若任一尝试触发空 `content_filter`，不做补偿重试并保持 `content_filter` 错误。JS Vercel 运行时同样设置 `parent_message_id`，但因无法直接调用 PoW API 而复用原始 PoW。
 
+- OpenAI Chat / Responses 在最终可见正文渲染阶段，会把 DeepSeek 搜索返回中的 `[citation:N]` / `[reference:N]` 标记替换成对应 Markdown 链接。`citation` 标记按一基序号解析；`reference` 标记只有在同一段正文中出现 `[reference:0]`（允许冒号后有空格）时才按零基序号映射，并且不会影响同段正文里的 `citation` 标记。
+
 ## 5. prompt 是怎么拼出来的
 
 OpenAI Chat / Responses 在标准化后、current input file 之前，会默认执行 `thinking_injection` 增强。它参考 DeepSeek V4 “把控制指令放在 user 消息末尾更稳定”的用法，在最新 user message 后追加思考增强提示词。当前内置默认提示词以 `Reasoning Effort: Absolute maximum with no shortcuts permitted.` 开头，并继续要求模型充分分解问题、覆盖潜在路径与边界条件、把完整推演过程显式写出。该开关默认启用，可通过 `thinking_injection.enabled=false` 关闭；也可以通过 `thinking_injection.prompt` 自定义提示词，留空时使用内置默认提示词。
@@ -114,6 +117,11 @@ OpenAI Chat / Responses 在标准化后、current input file 之前，会默认
 - 普通请求会直接出现在最终 `prompt` 的最新 user block 末尾。
 - 如果触发 current input file，它会进入完整上下文文件中。
 
+另外，`MessagesPrepareWithThinking` 还会在最终 prompt 的最前面预置一段固定的 system 级“输出完整性约束（Output integrity guard）”：
+
+- 如果上游上下文、工具输出或解析后的文本出现乱码、损坏、部分解析、重复或其他畸形片段，不要模仿、不要回显，只输出给用户的正确内容。
+- 这段约束位于普通 system / tool prompt 之前，因此是当前最终 prompt 里的最高优先级前置指令。
+
 ### 5.1 角色标记
 
 最终 prompt 使用 DeepSeek 风格角色标记：
@@ -152,10 +160,13 @@ OpenAI Chat / Responses 在标准化后、current input file 之前，会默认
 
 工具调用正例现在优先示范官方 DSML 风格：`<|DSML|tool_calls>` → `<|DSML|invoke name="...">` → `<|DSML|parameter name="...">`。
 兼容层仍接受旧式纯 `<tool_calls>` wrapper，但提示词会优先要求模型输出官方 DSML 标签，并强调不能只输出 closing wrapper 而漏掉 opening tag。需要注意：这是“兼容 DSML 外壳，内部仍以 XML 解析语义为准”，不是原生 DSML 全链路实现；DSML 标签会在解析入口归一化回现有 XML 标签后继续走同一套 parser。
-数组参数使用 `<item>...</item>` 子节点表示；当某个参数体只包含 item 子节点时，Go / Node 解析器会把它还原成数组，避免 `questions` / `options` 这类 schema 中要求 array 的参数被误解析成 `{ "item": ... }` 对象。若模型把完整结构化 XML fragment 误包进 CDATA，兼容层会在保护 `content` / `command` 等原文字段的前提下，尝试把非原文字段中的 CDATA XML fragment 还原成 object / array。不过，如果 CDATA 只是单个平面的 XML/HTML 标签，例如 `<b>urgent</b>` 这种行内标记，兼容层会保留原始字符串，不会强行升成 object / array；只有明显表示结构的 CDATA 片段，例如多兄弟节点、嵌套子节点或 `item` 列表，才会触发结构化恢复。
+数组参数使用 `<item>...</item>` 子节点表示；当某个参数体只包含 item 子节点时，Go / Node 解析器会把它还原成数组，避免 `questions` / `options` 这类 schema 中要求 array 的参数被误解析成 `{ "item": ... }` 对象。除此之外，解析器还会回收一些更松散的列表写法，例如 JSON array 字面量或逗号分隔的 JSON 项序列，只要它们足够明确；但 `<item>` 仍然是首选形态。若模型把完整结构化 XML fragment 误包进 CDATA，兼容层会在保护 `content` / `command` 等原文字段的前提下，尝试把非原文字段中的 CDATA XML fragment 还原成 object / array。不过，如果 CDATA 只是单个平面的 XML/HTML 标签，例如 `<b>urgent</b>` 这种行内标记，兼容层会保留原始字符串，不会强行升成 object / array；只有明显表示结构的 CDATA 片段，例如多兄弟节点、嵌套子节点或 `item` 列表，才会触发结构化恢复。
+Go 侧读取 DeepSeek SSE 时不再依赖 `bufio.Scanner` 的固定 2MiB 单行上限；当写文件类工具把很长的 `content` 放在单个 `data:` 行里返回时，非流式收集、流式解析和 auto-continue 透传都会保留完整行，再进入同一套工具解析与序列化流程。
 在 assistant 最终回包阶段，如果某个 tool 参数在声明 schema 中明确是 `string`，兼容层会在把解析后的 `tool_calls` / `function_call` 重新序列化成 OpenAI / Responses / Claude 可见参数前，递归把该路径上的 number / bool / object / array 统一转成字符串；其中 object / array 会压成紧凑 JSON 字符串。这个保护只对 schema 明确声明为 string 的路径生效，不会改写本来就是 `number` / `boolean` / `object` / `array` 的参数。这样可以兼容 DeepSeek 输出了结构化片段、但上游客户端工具 schema 又严格要求字符串参数的场景（例如 `content`、`prompt`、`path`、`taskId` 等）。
+工具 schema 的权威来源始终是**当前请求实际携带的 schema**，而不是同名工具在其他 runtime（Claude Code / OpenCode / Codex 等）里的默认印象。兼容层现在会同时兼容 OpenAI 风格 `function.parameters`、直接工具对象上的 `parameters` / `input_schema`、以及 camelCase 的 `inputSchema` / `schema`，并在最终输出阶段按这份请求内 schema 决定是保留 array/object，还是仅对明确声明为 `string` 的路径做字符串化。该规则同样适用于 Claude 的流式收尾和 Vercel Node 流式 tool-call formatter，避免不同 runtime 因 schema shape 差异而出现同名工具参数类型漂移。
 正例中的工具名只会来自当前请求实际声明的工具；如果当前请求没有足够的已知工具形态，就省略对应的单工具、多工具或嵌套示例，避免把不可用工具名写进 prompt。
 对执行类工具，脚本内容必须进入执行参数本身：`Bash` / `execute_command` 使用 `command`，`exec_command` 使用 `cmd`；不要把脚本示范成 `path` / `content` 文件写入参数。
+如果当前请求声明了 `Read` / `read_file` 这类读取工具，兼容层会额外注入一条 read-tool cache guard：当读取结果只表示“文件未变更 / 已在历史中 / 请引用先前上下文 / 没有正文内容”时，模型必须把它视为内容不可用，不能反复调用同一个无正文读取；应改为请求完整正文读取能力，或向用户说明需要重新提供文件内容。这个约束只缓解客户端缓存返回空内容导致的死循环，DS2API 不会也无法凭空恢复客户端本地文件正文。
 
 OpenAI 路径实现：
 [internal/promptcompat/tool_prompt.go](../internal/promptcompat/tool_prompt.go)
@@ -232,6 +243,14 @@ OpenAI 文件相关实现：
 - 文件 ID 收集：
   [internal/promptcompat/file_refs.go](../internal/promptcompat/file_refs.go)
 
+OpenAI 的文件上传现在不再是“只传文件本体”的通用路径，而是会先根据请求里的 `model` 解析出 DeepSeek 的上传类型，并把它透传到上传接口的 `x-model-type`。当前可见的上传类型就是 `default` / `expert` / `vision`，其中 vision 请求上传图片时必须带上 `vision`，否则下游容易退回到仅文本或 OCR 语义。这个模型类型会同时用于：
+
+- `/v1/files` 这类独立文件上传入口
+- Chat / Responses 的 inline 图片、附件上传
+- current input file 触发时生成的 `DS2API_HISTORY.txt` 上下文文件
+
+也就是说，文件上传和完成请求的 `model_type` 现在是一致的：完成 payload 里仍然是 `model_type`，上传文件则会在 DeepSeek 上传阶段携带同样的模型类型信息。
+
 结论：
 
 - “systemprompt 文字”在 prompt 里
@@ -243,9 +262,10 @@ OpenAI 文件相关实现：
 
 兼容层现在只保留 `current_input_file` 这一种拆分方式；旧的 `history_split` 已废弃，只保留为兼容旧配置的字段，不再参与请求处理。
 
-- `current_input_file` 默认开启；它用于把“完整上下文”合并进隐藏上下文文件。当最新 user turn 的纯文本长度达到 `current_input_file.min_chars`（默认 `0`）时，兼容层会上传一个文件名为 `IGNORE.txt` 的上下文文件，并在 live prompt 中只保留一个中性的 user 消息要求模型直接回答最新请求，不再暴露文件名或要求模型读取本地文件。
+- `current_input_file` 默认开启；它用于把“完整上下文”合并进 `DS2API_HISTORY.txt` 上下文文件。当最新 user turn 的纯文本长度达到 `current_input_file.min_chars`（默认 `0`）时，兼容层会上传一个文件名为 `DS2API_HISTORY.txt` 的上下文文件。文件内容会先做 OpenAI 消息标准化，再序列化成按轮次编号的 `DS2API_HISTORY.txt` 风格 transcript，带有 `# DS2API_HISTORY.txt` 标题和 `=== N. ROLE ===` 分段；live prompt 中则会给出一个 continuation 语气的 user 消息，引导模型从 `DS2API_HISTORY.txt` 的最新状态继续推进，并直接回答最新请求，避免把任务拉回起点。
 - 如果 `current_input_file.enabled=false`，请求会直接透传，不上传任何拆分上下文文件。
 - 旧的 `history_split.enabled` / `history_split.trigger_after_turns` 会被读取进配置对象以保持兼容，但不会触发拆分上传，也不会影响 `current_input_file` 的默认开启。
+- 即使触发 `current_input_file` 后 live prompt 被缩短，对客户端回包里的上下文 token 统计，仍会沿用**拆分前的完整 prompt 语义**做计数，而不是按缩短后的占位 prompt 计算；否则会把真实上下文显著算小。
 
 相关实现：
 
@@ -256,16 +276,24 @@ OpenAI 文件相关实现：
 - 旧历史拆分兼容壳：
   [internal/httpapi/openai/history/history_split.go](../internal/httpapi/openai/history/history_split.go)
 
-当前输入转文件启用并触发时，上传文件的真实文件名是 `IGNORE.txt`，文件内容是完整 `messages` 上下文；它仍会先用 OpenAI 消息标准化和 DeepSeek 角色标记序列化，再包进 `IGNORE` 文件边界里：
+当前输入转文件启用并触发时，上传文件的真实文件名是 `DS2API_HISTORY.txt`，文件内容是完整 `messages` 上下文；它仍会先用 OpenAI 消息标准化和 DeepSeek 角色标记序列化，再按轮次编号成 `DS2API_HISTORY.txt` 风格的 transcript（不再注入文件边界标签）：
 
 ```text
-[uploaded filename]: IGNORE.txt
-[file content end]
+[uploaded filename]: DS2API_HISTORY.txt
+# DS2API_HISTORY.txt
+Prior conversation history and tool progress.
 
-<｜begin▁of▁sentence｜><｜System｜>...<｜User｜>...<｜Assistant｜>...<｜Tool｜>...<｜User｜>...
+=== 1. SYSTEM ===
+...
 
-[file name]: IGNORE
-[file content begin]
+=== 2. USER ===
+...
+
+=== 3. ASSISTANT ===
+...
+
+=== 4. TOOL ===
+...
 ```
 
 开启后，请求的 live prompt 不再直接内联完整上下文，而是保留一个 user role 的短提示，提示模型基于已提供上下文直接回答最新请求；上传后的 `file_id` 会进入 `ref_file_ids`。
@@ -317,7 +345,7 @@ OpenAI 文件相关实现：
 
 ```json
 {
-  "prompt": "<｜begin▁of▁sentence｜><｜System｜>原 system / developer\n\nYou have access to these tools: ...<｜end▁of▁instructions｜><｜User｜>The current request and prior conversation context have already been provided. Answer the latest user request directly.<｜Assistant｜>",
+  "prompt": "<｜begin▁of▁sentence｜><｜System｜>原 system / developer\n\nYou have access to these tools: ...<｜end▁of▁instructions｜><｜User｜>Continue from the latest state in the attached DS2API_HISTORY.txt context. Treat it as the current working state and answer the latest user request directly.<｜Assistant｜>",
   "ref_file_ids": [
     "file-current-input-ignore",
     "file-systemprompt",
@@ -332,7 +360,7 @@ OpenAI 文件相关实现：
 
 - 大部分结构化语义被压进 `prompt`
 - 文件保持文件
-- 需要时把完整上下文拆进隐藏上下文文件
+- 需要时把完整上下文拆进 `DS2API_HISTORY.txt` 上下文文件，并按轮次编号成 transcript
 
 ## 12. 修改时必须同步本文档的场景
 
@@ -345,7 +373,7 @@ OpenAI 文件相关实现：
 - tool result 注入方式变更
 - tool prompt 模板或 tool_choice 约束变更
 - inline 文件上传 / 文件引用收集规则变更
-- current input file 触发条件、上传格式、`IGNORE` 包装格式变更
+- current input file 触发条件、上传格式、`DS2API_HISTORY.txt` transcript 结构变更
 - 旧 `history_split` 兼容逻辑的读取、忽略或退化行为变更
 - completion payload 字段语义变更
 - Claude / Gemini 对这套统一语义的复用关系变更

docs/toolcall-semantics.md

@@ -26,7 +26,7 @@
 </tool_calls>
 ```
 
-这不是原生 DSML 全链路实现。DSML 只作为 prompt 外壳和解析入口别名；进入 parser 前会被归一化成 `<tool_calls>` / `<invoke>` / `<parameter>`，内部仍以现有 XML 解析语义为准。
+这不是原生 DSML 全链路实现。DSML 主要用于让模型有意识地输出协议标识，隔离普通 XML 语义；进入 parser 前会按固定本地标签名归一化成 `<tool_calls>` / `<invoke>` / `<parameter>`，内部仍以现有 XML 解析语义为准。
 
 约束：
 
@@ -39,7 +39,8 @@
 兼容修复：
 
 - 如果模型漏掉 opening wrapper，但后面仍输出了一个或多个 invoke 并以 closing wrapper 收尾，Go 解析链路会在解析前补回缺失的 opening wrapper。
-- 如果模型把 DSML 标签里的分隔符 `|` 写漏成空格（例如 `<|DSML tool_calls>` / `<|DSML invoke>` / `<|DSML parameter>`，或无 leading pipe 的 `<DSML tool_calls>` 形态），或把 `DSML` 与工具标签名直接黏连（例如 `<DSMLtool_calls>` / `<DSMLinvoke>` / `<DSMLparameter>`），或把最前面的 pipe 误写成全宽竖线（例如 `<｜DSML|tool_calls>` / `<｜DSML|invoke>` / `<｜DSML|parameter>`），Go / Node 会在固定工具标签名范围内归一化；相似但非工具标签名（如 `tool_calls_extra`）仍按普通文本处理。
+- Go / Node 解析层不再枚举每一种 DSML typo。它会把工具标签名前的 `DSML`、管道符 `|` / `｜`、空白、重复 leading `<` 视为可容忍的协议噪声，然后只匹配固定本地标签名 `tool_calls` / `invoke` / `parameter`。例如 `<DSML|tool_calls>`、`<<|DSML|tool_calls>`、`<|DSML tool_calls>`、`<DSMLtool_calls>`、`<<DSML|DSML|tool_calls>` 都会归一化；相似但非固定标签名（如 `tool_calls_extra`）仍按普通文本处理。
+- 如果模型在固定工具标签名后多输出一个尾部管道符，例如 `<|DSML|tool_calls|` / `<|DSML|invoke|` / `<|DSML|parameter|`，兼容层会把这个尾部 `|` 当作异常标签终止符并补齐缺失的 `>`；如果后面已经有 `>`，也会消费这个多余 `|` 后再归一化。
 - 这是一个针对常见模型失误的窄修复，不改变推荐输出格式；prompt 仍要求模型直接输出完整 DSML 外壳。
 - 裸 `<invoke ...>` / `<parameter ...>` 不会被当成“已支持的工具语法”；只有 `tool_calls` wrapper 或可修复的缺失 opening wrapper 才会进入工具调用路径。
 
@@ -53,7 +54,7 @@
 
 在流式链路中（Go / Node 一致）：
 
-- DSML `<|DSML|tool_calls>` wrapper、兼容变体（`<dsml|tool_calls>`、`<｜tool_calls>`、`<|tool_calls>`、`<｜DSML|tool_calls>`）、窄容错空格分隔形态（如 `<|DSML tool_calls>`）、黏连形态（如 `<DSMLtool_calls>`）和 canonical `<tool_calls>` wrapper 都会进入结构化捕获
+- DSML `<|DSML|tool_calls>` wrapper、基于固定本地标签名的 DSML 噪声容错形态、尾部管道符形态（如 `<|DSML|tool_calls|`）和 canonical `<tool_calls>` wrapper 都会进入结构化捕获
 - 如果流里直接从 invoke 开始，但后面补上了 closing wrapper，Go 流式筛分也会按缺失 opening wrapper 的修复路径尝试恢复
 - 已识别成功的工具调用不会再次回流到普通文本
 - 不符合新格式的块不会执行，并继续按原样文本透传
@@ -61,6 +62,7 @@
 - 支持嵌套围栏（如 4 反引号嵌套 3 反引号）和 CDATA 内围栏保护
 - 如果模型把 `<![CDATA[` 打开后却没有闭合，流式扫描阶段仍会保守地继续缓冲，不会误把 CDATA 里的示例 XML 当成真实工具调用；在最终 parse / flush 恢复阶段，会对这类 loose CDATA 做窄修复，尽量保住外层已完整包裹的真实工具调用
 - 当文本中 mention 了某种标签名（如 `<dsml|tool_calls>` 或 Markdown inline code 里的 `<|DSML|tool_calls>`）而后面紧跟真正工具调用时，sieve 会跳过不可解析的 mention 候选并继续匹配后续真实工具块，不会因 mention 导致工具调用丢失，也不会截断 mention 后的正文
+- Go 侧 SSE 读取不再使用 `bufio.Scanner` 的固定 token 上限；单个 `data:` 行中包含很长的写文件参数时，非流式收集、流式解析与 auto-continue 透传都应保留完整行，再交给 tool parser 处理
 
 另外，`<parameter>` 的值如果本身是合法 JSON 字面量，也会按结构化值解析，而不是一律保留为字符串。例如 `123`、`true`、`null`、`[1,2]`、`{"a":1}` 都会还原成对应的 number / boolean / null / array / object。
 结构化 XML 参数也会还原为 JSON 结构：如果参数体只包含一个或多个 `<item>...</item>` 子节点，会输出数组；嵌套对象里的 item-only 字段也同样按数组处理。例如 `<parameter name="questions"><item><question>...</question></item></parameter>` 会输出 `{"questions":[{"question":"..."}]}`，而不是 `{"questions":{"item":...}}`。
@@ -94,7 +96,7 @@ node --test tests/node/stream-tool-sieve.test.js
 
 - DSML `<|DSML|tool_calls>` wrapper 正常解析
 - legacy canonical `<tool_calls>` wrapper 正常解析
-- 别名变体（`<dsml|tool_calls>`、`<｜tool_calls>`、`<|tool_calls>`）、DSML 空格分隔 typo（如 `<|DSML tool_calls>`）和黏连 typo（如 `<DSMLtool_calls>`）正常解析
+- 固定本地标签名的 DSML 噪声容错形态（如 `<DSML|tool_calls>`、`<<|DSML|tool_calls>`、`<|DSML tool_calls>`、`<DSMLtool_calls>`、`<<DSML|DSML|tool_calls>`）正常解析
 - 混搭标签（DSML wrapper + canonical inner）归一化后正常解析
 - 波浪线围栏 `~~~` 内的示例不执行
 - 嵌套围栏（4 反引号嵌套 3 反引号）内的示例不执行

go.mod

@@ -6,10 +6,13 @@ require (
 	github.com/andybalholm/brotli v1.2.1
 	github.com/go-chi/chi/v5 v5.2.5
 	github.com/google/uuid v1.6.0
+	github.com/hupe1980/go-tiktoken v0.0.10
 	github.com/refraction-networking/utls v1.8.2
 	github.com/router-for-me/CLIProxyAPI/v6 v6.9.14
 )
 
+require github.com/dlclark/regexp2 v1.11.5 // indirect
+
 require (
 	github.com/klauspost/compress v1.18.5 // indirect
 	github.com/sirupsen/logrus v1.9.4 // indirect

go.sum

@@ -2,10 +2,14 @@ github.com/andybalholm/brotli v1.2.1 h1:R+f5xP285VArJDRgowrfb9DqL18yVK0gKAW/F+eT
 github.com/andybalholm/brotli v1.2.1/go.mod h1:rzTDkvFWvIrjDXZHkuS16NPggd91W3kUSvPlQ1pLaKY=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dlclark/regexp2 v1.11.5 h1:Q/sSnsKerHeCkc/jSTNq1oCm7KiVgUMZRDUoRu0JQZQ=
+github.com/dlclark/regexp2 v1.11.5/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
 github.com/go-chi/chi/v5 v5.2.5 h1:Eg4myHZBjyvJmAFjFvWgrqDTXFyOzjj7YIm3L3mu6Ug=
 github.com/go-chi/chi/v5 v5.2.5/go.mod h1:X7Gx4mteadT3eDOMTsXzmI4/rwUpOwBHLpAfupzFJP0=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/hupe1980/go-tiktoken v0.0.10 h1:m6phOJaGyctqWdGIgwn9X8AfJvaG74tnQoDL+ntOUEQ=
+github.com/hupe1980/go-tiktoken v0.0.10/go.mod h1:NME6d8hrE+Jo+kLUZHhXShYV8e40hYkm4BbSLQKtvAo=
 github.com/klauspost/compress v1.18.5 h1:/h1gH5Ce+VWNLSWqPzOVn6XBO+vJbCNGvjoaGBFW2IE=
 github.com/klauspost/compress v1.18.5/go.mod h1:cwPg85FWrGar70rWktvGQj8/hthj3wpl0PGDogxkrSQ=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
@@ -37,6 +41,8 @@ golang.org/x/net v0.52.0 h1:He/TN1l0e4mmR3QqHMT2Xab3Aj3L9qjbhRm78/6jrW0=
 golang.org/x/net v0.52.0/go.mod h1:R1MAz7uMZxVMualyPXb+VaqGSa3LIaUqk0eEt3w36Sw=
 golang.org/x/sys v0.42.0 h1:omrd2nAlyT5ESRdCLYdm3+fMfNFE/+Rf4bDIQImRJeo=
 golang.org/x/sys v0.42.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
+golang.org/x/text v0.35.0 h1:JOVx6vVDFokkpaq1AEptVzLTpDe9KGpj5tR4/X+ybL8=
+golang.org/x/text v0.35.0/go.mod h1:khi/HExzZJ2pGnjenulevKNX1W67CUy0AsXcNubPGCA=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

internal/chathistory/store.go

@@ -14,6 +14,7 @@ import (
 	"github.com/google/uuid"
 
 	"ds2api/internal/config"
+	"ds2api/internal/util"
 )
 
 const (
@@ -309,8 +310,12 @@ func (s *Store) Update(id string, params UpdateParams) (Entry, error) {
 	if params.Status != "" {
 		item.Status = params.Status
 	}
-	item.ReasoningContent = params.ReasoningContent
-	item.Content = params.Content
+	if params.ReasoningContent != "" || item.ReasoningContent == "" {
+		item.ReasoningContent = params.ReasoningContent
+	}
+	if params.Content != "" || item.Content == "" {
+		item.Content = params.Content
+	}
 	item.Error = strings.TrimSpace(params.Error)
 	item.StatusCode = params.StatusCode
 	item.ElapsedMs = params.ElapsedMs
@@ -610,8 +615,8 @@ func buildPreview(item Entry) string {
 	if candidate == "" {
 		candidate = strings.TrimSpace(item.UserInput)
 	}
-	if len(candidate) > defaultPreviewAt {
-		return candidate[:defaultPreviewAt] + "..."
+	if truncated, ok := util.TruncateRunes(candidate, defaultPreviewAt); ok {
+		return truncated + "..."
 	}
 	return candidate
 }

internal/chathistory/store_test.go

@@ -8,6 +8,7 @@ import (
 	"strings"
 	"sync"
 	"testing"
+	"unicode/utf8"
 )
 
 func blockDetailDir(t *testing.T, detailDir string) func() {
@@ -105,6 +106,17 @@ func TestStoreCreatesAndPersistsEntries(t *testing.T) {
 	}
 }
 
+func TestBuildPreviewPreservesUTF8MB4Characters(t *testing.T) {
+	long := strings.Repeat("😀", defaultPreviewAt+1)
+	preview := buildPreview(Entry{Content: long})
+	if !utf8.ValidString(preview) {
+		t.Fatalf("expected valid utf-8 preview, got %q", preview)
+	}
+	if preview != strings.Repeat("😀", defaultPreviewAt)+"..." {
+		t.Fatalf("unexpected preview: %q", preview)
+	}
+}
+
 func TestStoreTrimsToConfiguredLimit(t *testing.T) {
 	path := filepath.Join(t.TempDir(), "chat_history.json")
 	store := New(path)
@@ -481,3 +493,112 @@ func TestStoreWritesOnlyChangedDetailFiles(t *testing.T) {
 		t.Fatalf("expected untouched detail file to remain byte-identical")
 	}
 }
+
+func TestUpdatePreservesContentWhenNewContentIsEmpty(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "chat_history.json")
+	store := New(path)
+
+	started, err := store.Start(StartParams{
+		CallerID:  "caller:abc",
+		Model:     "deepseek-v4-flash",
+		Stream:    true,
+		UserInput: "hello",
+	})
+	if err != nil {
+		t.Fatalf("start entry failed: %v", err)
+	}
+
+	if _, err := store.Update(started.ID, UpdateParams{
+		Status:           "streaming",
+		ReasoningContent: "let me think",
+		Content:          "I'll help you with that.",
+	}); err != nil {
+		t.Fatalf("progress update failed: %v", err)
+	}
+
+	updated, err := store.Update(started.ID, UpdateParams{
+		Status:    "success",
+		Content:   "",
+		Completed: true,
+	})
+	if err != nil {
+		t.Fatalf("success update failed: %v", err)
+	}
+
+	if updated.Content != "I'll help you with that." {
+		t.Fatalf("expected content to be preserved, got %q", updated.Content)
+	}
+	if updated.ReasoningContent != "let me think" {
+		t.Fatalf("expected reasoning content to be preserved, got %q", updated.ReasoningContent)
+	}
+
+	full, err := store.Get(started.ID)
+	if err != nil {
+		t.Fatalf("get entry failed: %v", err)
+	}
+	if full.Content != "I'll help you with that." {
+		t.Fatalf("expected persisted content to be preserved, got %q", full.Content)
+	}
+	if full.ReasoningContent != "let me think" {
+		t.Fatalf("expected persisted reasoning content to be preserved, got %q", full.ReasoningContent)
+	}
+}
+
+func TestUpdateAllowsSettingContentFromEmpty(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "chat_history.json")
+	store := New(path)
+
+	started, err := store.Start(StartParams{
+		CallerID:  "caller:abc",
+		Model:     "deepseek-v4-flash",
+		Stream:    true,
+		UserInput: "hello",
+	})
+	if err != nil {
+		t.Fatalf("start entry failed: %v", err)
+	}
+
+	updated, err := store.Update(started.ID, UpdateParams{
+		Status:  "success",
+		Content: "final answer",
+	})
+	if err != nil {
+		t.Fatalf("update failed: %v", err)
+	}
+	if updated.Content != "final answer" {
+		t.Fatalf("expected content to be set, got %q", updated.Content)
+	}
+}
+
+func TestUpdateAllowsOverwritingContentWithNewValue(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "chat_history.json")
+	store := New(path)
+
+	started, err := store.Start(StartParams{
+		CallerID:  "caller:abc",
+		Model:     "deepseek-v4-flash",
+		Stream:    true,
+		UserInput: "hello",
+	})
+	if err != nil {
+		t.Fatalf("start entry failed: %v", err)
+	}
+
+	if _, err := store.Update(started.ID, UpdateParams{
+		Status:  "streaming",
+		Content: "partial",
+	}); err != nil {
+		t.Fatalf("first update failed: %v", err)
+	}
+
+	updated, err := store.Update(started.ID, UpdateParams{
+		Status:  "success",
+		Content: "final answer",
+	})
+	if err != nil {
+		t.Fatalf("second update failed: %v", err)
+	}
+	if updated.Content != "final answer" {
+		t.Fatalf("expected content to be overwritten, got %q", updated.Content)
+	}
+}

internal/config/config_edge_test.go

@@ -79,13 +79,20 @@ func TestGetModelConfigDeepSeekExpertReasonerSearch(t *testing.T) {
 	}
 }
 
-func TestGetModelConfigDeepSeekVisionReasonerSearch(t *testing.T) {
-	thinking, search, ok := GetModelConfig("deepseek-v4-vision-search")
+func TestGetModelConfigDeepSeekVision(t *testing.T) {
+	thinking, search, ok := GetModelConfig("deepseek-v4-vision")
 	if !ok {
-		t.Fatal("expected ok for deepseek-v4-vision-search")
+		t.Fatal("expected ok for deepseek-v4-vision")
 	}
-	if !thinking || !search {
-		t.Fatalf("expected both true, got thinking=%v search=%v", thinking, search)
+	if !thinking || search {
+		t.Fatalf("expected thinking=true search=false, got thinking=%v search=%v", thinking, search)
+	}
+}
+
+func TestGetModelConfigDeepSeekVisionSearchUnsupported(t *testing.T) {
+	_, _, ok := GetModelConfig("deepseek-v4-vision-search")
+	if ok {
+		t.Fatal("expected deepseek-v4-vision-search to be unsupported")
 	}
 }
 
@@ -748,18 +755,16 @@ func TestOpenAIModelsResponse(t *testing.T) {
 		t.Fatal("expected non-empty models list")
 	}
 	expected := map[string]bool{
-		"deepseek-v4-flash":                    false,
-		"deepseek-v4-flash-nothinking":         false,
-		"deepseek-v4-pro":                      false,
-		"deepseek-v4-pro-nothinking":           false,
-		"deepseek-v4-flash-search":             false,
-		"deepseek-v4-flash-search-nothinking":  false,
-		"deepseek-v4-pro-search":               false,
-		"deepseek-v4-pro-search-nothinking":    false,
-		"deepseek-v4-vision":                   false,
-		"deepseek-v4-vision-nothinking":        false,
-		"deepseek-v4-vision-search":            false,
-		"deepseek-v4-vision-search-nothinking": false,
+		"deepseek-v4-flash":                   false,
+		"deepseek-v4-flash-nothinking":        false,
+		"deepseek-v4-pro":                     false,
+		"deepseek-v4-pro-nothinking":          false,
+		"deepseek-v4-flash-search":            false,
+		"deepseek-v4-flash-search-nothinking": false,
+		"deepseek-v4-pro-search":              false,
+		"deepseek-v4-pro-search-nothinking":   false,
+		"deepseek-v4-vision":                  false,
+		"deepseek-v4-vision-nothinking":       false,
 	}
 	for _, model := range data {
 		if _, ok := expected[model.ID]; ok {

internal/config/model_alias_test.go

@@ -144,10 +144,17 @@ func TestResolveModelCustomAliasToExpert(t *testing.T) {
 
 func TestResolveModelCustomAliasToVision(t *testing.T) {
 	got, ok := ResolveModel(mockModelAliasReader{
-		"my-vision-model": "deepseek-v4-vision-search",
+		"my-vision-model": "deepseek-v4-vision",
 	}, "my-vision-model")
-	if !ok || got != "deepseek-v4-vision-search" {
-		t.Fatalf("expected alias -> deepseek-v4-vision-search, got ok=%v model=%q", ok, got)
+	if !ok || got != "deepseek-v4-vision" {
+		t.Fatalf("expected alias -> deepseek-v4-vision, got ok=%v model=%q", ok, got)
+	}
+}
+
+func TestResolveModelHeuristicVisionIgnoresSearchSuffix(t *testing.T) {
+	got, ok := ResolveModel(nil, "gemini-vision-search")
+	if !ok || got != "deepseek-v4-vision" {
+		t.Fatalf("expected heuristic vision alias to resolve without search variant, got ok=%v model=%q", ok, got)
 	}
 }
 

internal/config/models.go

@@ -22,7 +22,6 @@ var deepSeekBaseModels = []ModelInfo{
 	{ID: "deepseek-v4-flash-search", Object: "model", Created: 1677610602, OwnedBy: "deepseek", Permission: []any{}},
 	{ID: "deepseek-v4-pro-search", Object: "model", Created: 1677610602, OwnedBy: "deepseek", Permission: []any{}},
 	{ID: "deepseek-v4-vision", Object: "model", Created: 1677610602, OwnedBy: "deepseek", Permission: []any{}},
-	{ID: "deepseek-v4-vision-search", Object: "model", Created: 1677610602, OwnedBy: "deepseek", Permission: []any{}},
 }
 
 var DeepSeekModels = appendNoThinkingVariants(deepSeekBaseModels)
@@ -67,7 +66,7 @@ func GetModelConfig(model string) (thinking bool, search bool, ok bool) {
 	switch baseModel {
 	case "deepseek-v4-flash", "deepseek-v4-pro", "deepseek-v4-vision":
 		return !noThinking, false, true
-	case "deepseek-v4-flash-search", "deepseek-v4-pro-search", "deepseek-v4-vision-search":
+	case "deepseek-v4-flash-search", "deepseek-v4-pro-search":
 		return !noThinking, true, true
 	default:
 		return false, false, false
@@ -81,7 +80,7 @@ func GetModelType(model string) (modelType string, ok bool) {
 		return "default", true
 	case "deepseek-v4-pro", "deepseek-v4-pro-search":
 		return "expert", true
-	case "deepseek-v4-vision", "deepseek-v4-vision-search":
+	case "deepseek-v4-vision":
 		return "vision", true
 	default:
 		return "", false
@@ -359,8 +358,6 @@ func resolveCanonicalModel(aliases map[string]string, model string) (string, boo
 	useSearch := strings.Contains(model, "search")
 
 	switch {
-	case useVision && useSearch:
-		return "deepseek-v4-vision-search", true
 	case useVision:
 		return "deepseek-v4-vision", true
 	case useReasoner && useSearch:

internal/config/paths.go

@@ -30,9 +30,29 @@ func ResolvePath(envKey, defaultRel string) string {
 }
 
 func ConfigPath() string {
+	if strings.TrimSpace(os.Getenv("DS2API_CONFIG_PATH")) == "" && BaseDir() == "/app" {
+		return containerDefaultConfigPath()
+	}
 	return ResolvePath("DS2API_CONFIG_PATH", "config.json")
 }
 
+func containerDefaultConfigPath() string {
+	// Container images run as non-root by default. Only use /data when mounted/provisioned.
+	// Otherwise keep /app/config.json so admin-side save does not fail on MkdirAll("/data").
+	if st, err := os.Stat("/data"); err == nil && st.IsDir() {
+		return "/data/config.json"
+	}
+	return "/app/config.json"
+}
+
+func legacyContainerConfigPath() string {
+	return "/app/config.json"
+}
+
+func shouldTryLegacyContainerConfigPath() bool {
+	return strings.TrimSpace(os.Getenv("DS2API_CONFIG_PATH")) == "" && BaseDir() == "/app"
+}
+
 func RawStreamSampleRoot() string {
 	return ResolvePath("DS2API_RAW_STREAM_SAMPLE_ROOT", "tests/raw_stream_samples")
 }

internal/config/paths_test.go

@@ -0,0 +1,28 @@
+package config
+
+import (
+	"os"
+	"testing"
+)
+
+func TestContainerDefaultConfigPath(t *testing.T) {
+	t.Run("fallback to /app when /data is missing", func(t *testing.T) {
+		// This test environment does not guarantee a writable/mounted /data.
+		// If /data is absent we must keep /app fallback to avoid persistence failures.
+		if _, err := os.Stat("/data"); err == nil {
+			t.Skip("/data exists in this environment; cannot validate missing-/data fallback")
+		}
+		if got := containerDefaultConfigPath(); got != "/app/config.json" {
+			t.Fatalf("containerDefaultConfigPath() = %q, want %q", got, "/app/config.json")
+		}
+	})
+
+	t.Run("prefer /data when /data directory exists", func(t *testing.T) {
+		if _, err := os.Stat("/data"); err != nil {
+			t.Skip("/data does not exist in this environment")
+		}
+		if got := containerDefaultConfigPath(); got != "/data/config.json" {
+			t.Fatalf("containerDefaultConfigPath() = %q, want %q", got, "/data/config.json")
+		}
+	})
+}

internal/config/store.go

@@ -87,12 +87,17 @@ func loadConfig() (Config, bool, error) {
 		}
 		return cfg, true, err
 	}
-
 	cfg, err := loadConfigFromFile(ConfigPath())
 	if err != nil {
+		if shouldTryLegacyContainerConfigPath() {
+			legacyPath := legacyContainerConfigPath()
+			if legacyCfg, legacyErr := loadConfigFromFile(legacyPath); legacyErr == nil {
+				Logger.Info("[config] loaded legacy container config path", "path", legacyPath)
+				return legacyCfg, false, nil
+			}
+		}
 		if IsVercel() {
-			// Vercel one-click deploy may start without a writable/present config file.
-			// Keep an in-memory config so users can bootstrap via WebUI then sync env.
+			// Vercel may start without writable/present config; keep in-memory bootstrap config.
 			return Config{}, true, nil
 		}
 		return Config{}, false, err

internal/deepseek/client/client_continue.go

@@ -7,6 +7,7 @@ import (
 	dsprotocol "ds2api/internal/deepseek/protocol"
 	"encoding/json"
 	"errors"
+	"fmt"
 	"io"
 	"net/http"
 	"strings"
@@ -27,7 +28,7 @@ type continueState struct {
 }
 
 // wrapCompletionWithAutoContinue wraps the completion response body so that
-// if the upstream indicates the response is incomplete (WIP / INCOMPLETE /
+// if the upstream indicates the response is incomplete (INCOMPLETE /
 // AUTO_CONTINUE), ds2api will automatically call the DeepSeek continue
 // endpoint and splice the continuation SSE stream onto the original.
 // The caller sees a single, seamless SSE stream.
@@ -132,33 +133,51 @@ func pumpAutoContinue(ctx context.Context, pw *io.PipeWriter, initial io.ReadClo
 // sentinels are consumed (not forwarded) so that the downstream only sees
 // one final [DONE] at the very end.
 func streamBodyWithContinueState(ctx context.Context, pw *io.PipeWriter, body io.Reader, state *continueState) (bool, error) {
-	scanner := bufio.NewScanner(body)
-	scanner.Buffer(make([]byte, 0, 64*1024), 2*1024*1024)
+	reader := bufio.NewReaderSize(body, 64*1024)
 	hadDone := false
-	for scanner.Scan() {
+	for {
 		select {
 		case <-ctx.Done():
 			return hadDone, ctx.Err()
 		default:
 		}
-		line := append([]byte{}, scanner.Bytes()...)
-		trimmed := strings.TrimSpace(string(line))
-		if trimmed == "" {
-			continue
-		}
-		if strings.HasPrefix(trimmed, "data:") {
-			data := strings.TrimSpace(strings.TrimPrefix(trimmed, "data:"))
-			if data == "[DONE]" {
-				hadDone = true
-				continue
+		line, err := reader.ReadBytes('\n')
+		if len(line) == 0 && err != nil {
+			if err == io.EOF {
+				return hadDone, nil
 			}
-			state.observe(data)
+			return hadDone, err
 		}
-		if _, err := io.Copy(pw, bytes.NewReader(append(line, '\n'))); err != nil {
+		trimmed := strings.TrimSpace(string(line))
+		if trimmed != "" {
+			if strings.HasPrefix(trimmed, "data:") {
+				data := strings.TrimSpace(strings.TrimPrefix(trimmed, "data:"))
+				if data == "[DONE]" {
+					hadDone = true
+					if err != nil && err != io.EOF {
+						return hadDone, err
+					}
+					if err == io.EOF {
+						return hadDone, nil
+					}
+					continue
+				}
+				state.observe(data)
+			}
+			if !strings.HasSuffix(string(line), "\n") {
+				line = append(line, '\n')
+			}
+			if _, copyErr := io.Copy(pw, bytes.NewReader(line)); copyErr != nil {
+				return hadDone, copyErr
+			}
+		}
+		if err != nil {
+			if err == io.EOF {
+				return hadDone, nil
+			}
 			return hadDone, err
 		}
 	}
-	return hadDone, scanner.Err()
 }
 
 // observe extracts continue-relevant signals from an SSE JSON chunk.
@@ -174,49 +193,100 @@ func (s *continueState) observe(data string) {
 	if id := intFrom(chunk["response_message_id"]); id > 0 {
 		s.responseMessageID = id
 	}
-	// Path-based status: {"p": "response/status", "v": "FINISHED"}
-	if p, _ := chunk["p"].(string); p == "response/status" {
-		if status, _ := chunk["v"].(string); status != "" {
-			s.lastStatus = strings.TrimSpace(status)
-			if strings.EqualFold(s.lastStatus, "FINISHED") {
-				s.finished = true
-			}
-		}
+	s.observeDirectPatch(asString(chunk["p"]), chunk["v"])
+	if p, _ := chunk["p"].(string); p == "response" {
+		s.observeBatchPatches("response", chunk["v"])
+	} else {
+		s.observeBatchPatches("", chunk["v"])
 	}
-	// Nested v.response
-	v, _ := chunk["v"].(map[string]any)
-	if response, _ := v["response"].(map[string]any); response != nil {
-		if id := intFrom(response["message_id"]); id > 0 {
-			s.responseMessageID = id
-		}
-		if status, _ := response["status"].(string); status != "" {
-			s.lastStatus = strings.TrimSpace(status)
-			if strings.EqualFold(s.lastStatus, "FINISHED") {
-				s.finished = true
-			}
-		}
-		if autoContinue, ok := response["auto_continue"].(bool); ok && autoContinue {
+	if v, _ := chunk["v"].(map[string]any); v != nil {
+		s.observeResponseObject(v["response"])
+	}
+	if message, _ := chunk["message"].(map[string]any); message != nil {
+		s.observeResponseObject(message["response"])
+	}
+}
+
+func (s *continueState) observeDirectPatch(path string, value any) {
+	if s == nil {
+		return
+	}
+	switch strings.Trim(strings.TrimSpace(path), "/") {
+	case "response/status", "status", "response/quasi_status", "quasi_status":
+		s.setStatus(asString(value))
+	case "response/auto_continue", "auto_continue":
+		if v, ok := value.(bool); ok && v {
 			s.lastStatus = "AUTO_CONTINUE"
 		}
 	}
-	// Nested message.response
-	if message, _ := chunk["message"].(map[string]any); message != nil {
-		if response, _ := message["response"].(map[string]any); response != nil {
-			if id := intFrom(response["message_id"]); id > 0 {
-				s.responseMessageID = id
-			}
-			if status, _ := response["status"].(string); status != "" {
-				s.lastStatus = strings.TrimSpace(status)
-				if strings.EqualFold(s.lastStatus, "FINISHED") {
-					s.finished = true
-				}
+}
+
+func (s *continueState) observeResponseObject(raw any) {
+	if s == nil {
+		return
+	}
+	response, _ := raw.(map[string]any)
+	if response == nil {
+		return
+	}
+	if id := intFrom(response["message_id"]); id > 0 {
+		s.responseMessageID = id
+	}
+	s.setStatus(asString(response["status"]))
+	if autoContinue, ok := response["auto_continue"].(bool); ok && autoContinue {
+		s.lastStatus = "AUTO_CONTINUE"
+	}
+}
+
+func (s *continueState) observeBatchPatches(parentPath string, raw any) {
+	if s == nil {
+		return
+	}
+	patches, ok := raw.([]any)
+	if !ok {
+		return
+	}
+	for _, patch := range patches {
+		m, ok := patch.(map[string]any)
+		if !ok {
+			continue
+		}
+		path := strings.TrimSpace(asString(m["p"]))
+		if path == "" {
+			continue
+		}
+		fullPath := path
+		if parent := strings.Trim(strings.TrimSpace(parentPath), "/"); parent != "" && !strings.Contains(path, "/") {
+			fullPath = parent + "/" + path
+		}
+		switch strings.Trim(strings.TrimSpace(fullPath), "/") {
+		case "response/status", "status", "response/quasi_status", "quasi_status":
+			s.setStatus(asString(m["v"]))
+		case "response/auto_continue", "auto_continue":
+			if v, ok := m["v"].(bool); ok && v {
+				s.lastStatus = "AUTO_CONTINUE"
 			}
 		}
 	}
 }
 
-// shouldContinue returns true when the upstream indicates the response is
-// not yet finished and we have enough information to issue a continue request.
+func (s *continueState) setStatus(status string) {
+	if s == nil {
+		return
+	}
+	normalized := strings.TrimSpace(status)
+	if normalized == "" {
+		return
+	}
+	s.lastStatus = normalized
+	if strings.EqualFold(normalized, "FINISHED") || strings.EqualFold(normalized, "CONTENT_FILTER") {
+		s.finished = true
+	}
+}
+
+// shouldContinue returns true when the upstream explicitly indicates the
+// response is incomplete and we have enough information to issue a continue
+// request. Plain WIP is not sufficient because normal streams begin in WIP.
 func (s *continueState) shouldContinue() bool {
 	if s == nil {
 		return false
@@ -225,7 +295,7 @@ func (s *continueState) shouldContinue() bool {
 		return false
 	}
 	switch strings.ToUpper(strings.TrimSpace(s.lastStatus)) {
-	case "WIP", "INCOMPLETE", "AUTO_CONTINUE":
+	case "INCOMPLETE", "AUTO_CONTINUE":
 		return true
 	default:
 		return false
@@ -241,3 +311,19 @@ func (s *continueState) prepareForNextRound() {
 	s.finished = false
 	s.lastStatus = ""
 }
+
+func asString(v any) string {
+	if v == nil {
+		return ""
+	}
+	switch x := v.(type) {
+	case string:
+		return x
+	default:
+		s := strings.TrimSpace(strings.ReplaceAll(strings.TrimSpace(fmt.Sprint(v)), "\u0000", ""))
+		if s == "<nil>" {
+			return ""
+		}
+		return s
+	}
+}

internal/deepseek/client/client_continue_test.go

@@ -8,6 +8,7 @@ import (
 	"io"
 	"net/http"
 	"strings"
+	"sync/atomic"
 	"testing"
 
 	"ds2api/internal/auth"
@@ -124,6 +125,146 @@ func TestCallCompletionAutoContinueThreadsPowHeader(t *testing.T) {
 	}
 }
 
+func TestAutoContinueDoesNotTriggerOnPlainWIPWithoutExplicitContinuationSignal(t *testing.T) {
+	initialBody := strings.Join([]string{
+		`data: {"response_message_id":321,"v":{"response":{"message_id":321,"status":"WIP","auto_continue":false}}}`,
+		`data: [DONE]`,
+	}, "\n") + "\n"
+
+	var continueCalls atomic.Int32
+	body := newAutoContinueBody(context.Background(), io.NopCloser(strings.NewReader(initialBody)), "session-123", 8, func(context.Context, string, int) (*http.Response, error) {
+		continueCalls.Add(1)
+		return nil, errors.New("continue should not have been called")
+	})
+	defer func() { _ = body.Close() }()
+
+	out, err := io.ReadAll(body)
+	if err != nil {
+		t.Fatalf("read body failed: %v", err)
+	}
+	if continueCalls.Load() != 0 {
+		t.Fatalf("expected no continue calls, got %d", continueCalls.Load())
+	}
+	if !bytes.Contains(out, []byte(`"status":"WIP"`)) || !bytes.Contains(out, []byte(`data: [DONE]`)) {
+		t.Fatalf("expected original body to pass through unchanged, got=%s", string(out))
+	}
+}
+
+func TestAutoContinuePassesThroughLongSingleSSELine(t *testing.T) {
+	payload := strings.Repeat("x", 2*1024*1024+4096)
+	initialBody := `data: {"p":"response/content","v":"` + payload + `"}` + "\n" +
+		`data: [DONE]` + "\n"
+
+	body := newAutoContinueBody(context.Background(), io.NopCloser(strings.NewReader(initialBody)), "session-123", 8, func(context.Context, string, int) (*http.Response, error) {
+		return nil, errors.New("continue should not have been called")
+	})
+	defer func() { _ = body.Close() }()
+
+	out, err := io.ReadAll(body)
+	if err != nil {
+		t.Fatalf("read body failed: %v", err)
+	}
+	if !bytes.Contains(out, []byte(payload)) {
+		t.Fatalf("expected long SSE payload to pass through, got len=%d want payload len=%d", len(out), len(payload))
+	}
+	if !bytes.Contains(out, []byte(`data: [DONE]`)) {
+		t.Fatalf("expected final DONE sentinel in body, got len=%d", len(out))
+	}
+}
+
+func TestAutoContinueTriggersOnDirectQuasiStatusIncomplete(t *testing.T) {
+	initialBody := strings.Join([]string{
+		`data: {"response_message_id":321,"p":"response/content","v":"<tool_calls><invoke name=\"write_file\"><parameter name=\"content\"><![CDATA[part-one"}`,
+		`data: {"p":"response/quasi_status","v":"INCOMPLETE"}`,
+		`data: [DONE]`,
+	}, "\n") + "\n"
+
+	var continueCalls atomic.Int32
+	body := newAutoContinueBody(context.Background(), io.NopCloser(strings.NewReader(initialBody)), "session-123", 8, func(context.Context, string, int) (*http.Response, error) {
+		continueCalls.Add(1)
+		return &http.Response{
+			StatusCode: http.StatusOK,
+			Header:     make(http.Header),
+			Body: io.NopCloser(strings.NewReader(
+				`data: {"response_message_id":322,"p":"response/content","v":"-part-two]]></parameter></invoke></tool_calls>"}` + "\n" +
+					`data: {"p":"response/status","v":"FINISHED"}` + "\n" +
+					`data: [DONE]` + "\n",
+			)),
+		}, nil
+	})
+	defer func() { _ = body.Close() }()
+
+	out, err := io.ReadAll(body)
+	if err != nil {
+		t.Fatalf("read body failed: %v", err)
+	}
+	if continueCalls.Load() != 1 {
+		t.Fatalf("expected exactly one continue call, got %d", continueCalls.Load())
+	}
+	if !bytes.Contains(out, []byte("part-one")) || !bytes.Contains(out, []byte("-part-two")) {
+		t.Fatalf("expected continued tool content in body, got=%s", string(out))
+	}
+}
+
+func TestAutoContinueTriggersOnResponseBatchQuasiStatusIncomplete(t *testing.T) {
+	initialBody := strings.Join([]string{
+		`data: {"response_message_id":321,"v":{"response":{"message_id":321,"status":"WIP","auto_continue":false}}}`,
+		`data: {"p":"response","o":"BATCH","v":[{"p":"accumulated_token_usage","v":2413},{"p":"quasi_status","v":"INCOMPLETE"}]}`,
+		`data: [DONE]`,
+	}, "\n") + "\n"
+
+	var continueCalls atomic.Int32
+	body := newAutoContinueBody(context.Background(), io.NopCloser(strings.NewReader(initialBody)), "session-123", 8, func(context.Context, string, int) (*http.Response, error) {
+		continueCalls.Add(1)
+		return &http.Response{
+			StatusCode: http.StatusOK,
+			Header:     make(http.Header),
+			Body: io.NopCloser(strings.NewReader(
+				`data: {"response_message_id":322,"p":"response/status","v":"FINISHED"}` + "\n" +
+					`data: [DONE]` + "\n",
+			)),
+		}, nil
+	})
+	defer func() { _ = body.Close() }()
+
+	out, err := io.ReadAll(body)
+	if err != nil {
+		t.Fatalf("read body failed: %v", err)
+	}
+	if continueCalls.Load() != 1 {
+		t.Fatalf("expected exactly one continue call, got %d", continueCalls.Load())
+	}
+	if !bytes.Contains(out, []byte(`"quasi_status","v":"INCOMPLETE"`)) || !bytes.Contains(out, []byte(`"v":"FINISHED"`)) {
+		t.Fatalf("expected continued output to include initial and final rounds, got=%s", string(out))
+	}
+}
+
+func TestAutoContinueDoesNotTriggerWhenResponseBatchQuasiStatusFinished(t *testing.T) {
+	initialBody := strings.Join([]string{
+		`data: {"response_message_id":321,"v":{"response":{"message_id":321,"status":"WIP","auto_continue":false}}}`,
+		`data: {"p":"response","o":"BATCH","v":[{"p":"accumulated_token_usage","v":2413},{"p":"quasi_status","v":"FINISHED"}]}`,
+		`data: [DONE]`,
+	}, "\n") + "\n"
+
+	var continueCalls atomic.Int32
+	body := newAutoContinueBody(context.Background(), io.NopCloser(strings.NewReader(initialBody)), "session-123", 8, func(context.Context, string, int) (*http.Response, error) {
+		continueCalls.Add(1)
+		return nil, errors.New("continue should not have been called")
+	})
+	defer func() { _ = body.Close() }()
+
+	out, err := io.ReadAll(body)
+	if err != nil {
+		t.Fatalf("read body failed: %v", err)
+	}
+	if continueCalls.Load() != 0 {
+		t.Fatalf("expected no continue calls, got %d", continueCalls.Load())
+	}
+	if !bytes.Contains(out, []byte(`"quasi_status","v":"FINISHED"`)) || !bytes.Contains(out, []byte(`data: [DONE]`)) {
+		t.Fatalf("expected original finished body to pass through unchanged, got=%s", string(out))
+	}
+}
+
 type failingOrCompletionDoer struct {
 	completionResp *http.Response
 }
@@ -134,3 +275,33 @@ func (d failingOrCompletionDoer) Do(req *http.Request) (*http.Response, error) {
 	}
 	return nil, errors.New("forced stream failure")
 }
+
+func TestAutoContinuePreservesIncompleteStateWhenNextChunkOmitsStatus(t *testing.T) {
+	initialBody := strings.Join([]string{
+		`data: {"response_message_id":321,"v":{"response":{"message_id":321,"status":"INCOMPLETE"}}}`,
+		`data: {"p":"response/content","v":{"text":"continued"}}`,
+		`data: [DONE]`,
+	}, "\n") + "\n"
+
+	var continueCalls atomic.Int32
+	body := newAutoContinueBody(context.Background(), io.NopCloser(strings.NewReader(initialBody)), "session-123", 8, func(context.Context, string, int) (*http.Response, error) {
+		continueCalls.Add(1)
+		return &http.Response{
+			StatusCode: http.StatusOK,
+			Header:     make(http.Header),
+			Body: io.NopCloser(strings.NewReader(
+				`data: {"response_message_id":322,"p":"response/status","v":"FINISHED"}` + "\n" +
+					`data: [DONE]` + "\n",
+			)),
+		}, nil
+	})
+	defer func() { _ = body.Close() }()
+
+	_, err := io.ReadAll(body)
+	if err != nil {
+		t.Fatalf("read body failed: %v", err)
+	}
+	if continueCalls.Load() != 1 {
+		t.Fatalf("expected exactly one continue call, got %d", continueCalls.Load())
+	}
+}

internal/deepseek/client/client_upload.go

@@ -23,6 +23,7 @@ type UploadFileRequest struct {
 	Filename    string
 	ContentType string
 	Purpose     string
+	ModelType   string
 	Data        []byte
 }
 
@@ -54,6 +55,7 @@ func (c *Client) UploadFile(ctx context.Context, a *auth.RequestAuth, req Upload
 		contentType = "application/octet-stream"
 	}
 	purpose := strings.TrimSpace(req.Purpose)
+	modelType := strings.ToLower(strings.TrimSpace(req.ModelType))
 	body, contentTypeHeader, err := buildUploadMultipartBody(filename, contentType, req.Data)
 	if err != nil {
 		return nil, err
@@ -64,6 +66,9 @@ func (c *Client) UploadFile(ctx context.Context, a *auth.RequestAuth, req Upload
 		"purpose":      purpose,
 		"bytes":        len(req.Data),
 	}
+	if modelType != "" {
+		capturePayload["model_type"] = modelType
+	}
 	captureSession := c.capture.Start("deepseek_upload_file", dsprotocol.DeepSeekUploadFileURL, a.AccountID, capturePayload)
 	attempts := 0
 	refreshed := false
@@ -81,6 +86,9 @@ func (c *Client) UploadFile(ctx context.Context, a *auth.RequestAuth, req Upload
 		}
 		headers := c.authHeaders(a.DeepSeekToken)
 		headers["Content-Type"] = contentTypeHeader
+		if modelType != "" {
+			headers["x-model-type"] = modelType
+		}
 		headers["x-ds-pow-response"] = powHeader
 		headers["x-file-size"] = strconv.Itoa(len(req.Data))
 		headers["x-thinking-enabled"] = "1"

internal/deepseek/client/client_upload_test.go

@@ -82,6 +82,7 @@ func TestUploadFileUsesUploadTargetPowAndMultipartHeaders(t *testing.T) {
 	var seenTargetPath string
 	var seenContentType string
 	var seenFileSize string
+	var seenModelType string
 	var seenBody string
 	call := 0
 	client := &Client{
@@ -96,6 +97,7 @@ func TestUploadFileUsesUploadTargetPowAndMultipartHeaders(t *testing.T) {
 				seenPow = req.Header.Get("x-ds-pow-response")
 				seenContentType = req.Header.Get("Content-Type")
 				seenFileSize = req.Header.Get("x-file-size")
+				seenModelType = req.Header.Get("x-model-type")
 				seenBody = string(bodyBytes)
 				return &http.Response{StatusCode: http.StatusOK, Header: make(http.Header), Body: io.NopCloser(strings.NewReader(uploadResponse)), Request: req}, nil
 			default:
@@ -112,6 +114,7 @@ func TestUploadFileUsesUploadTargetPowAndMultipartHeaders(t *testing.T) {
 		Filename:    "demo.txt",
 		ContentType: "text/plain",
 		Purpose:     "assistants",
+		ModelType:   "vision",
 		Data:        []byte("hello"),
 	}, 1)
 	if err != nil {
@@ -140,6 +143,9 @@ func TestUploadFileUsesUploadTargetPowAndMultipartHeaders(t *testing.T) {
 	if seenFileSize != "5" {
 		t.Fatalf("expected x-file-size=5, got %q", seenFileSize)
 	}
+	if seenModelType != "vision" {
+		t.Fatalf("expected x-model-type=vision, got %q", seenModelType)
+	}
 	if !strings.HasPrefix(seenContentType, "multipart/form-data; boundary=") {
 		t.Fatalf("expected multipart content type, got %q", seenContentType)
 	}

internal/deepseek/protocol/constants.go

@@ -159,6 +159,6 @@ func toStringSet(in []string) map[string]struct{} {
 
 const (
 	KeepAliveTimeout  = 5
-	StreamIdleTimeout = 90
-	MaxKeepaliveCount = 10
+	StreamIdleTimeout = 300
+	MaxKeepaliveCount = 40
 )

internal/deepseek/protocol/constants_shared.json

@@ -2,7 +2,7 @@
   "client": {
     "name": "DeepSeek",
     "platform": "android",
-    "version": "2.0.1",
+    "version": "2.0.4",
     "android_api_level": "35",
     "locale": "zh_CN"
   },
@@ -24,4 +24,4 @@
   "skip_exact_paths": [
     "response/search_status"
   ]
-}
+}

internal/deepseek/protocol/sse.go

@@ -2,20 +2,24 @@ package protocol
 
 import (
 	"bufio"
+	"io"
 	"net/http"
 )
 
 func ScanSSELines(resp *http.Response, onLine func([]byte) bool) error {
-	scanner := bufio.NewScanner(resp.Body)
-	buf := make([]byte, 0, 64*1024)
-	scanner.Buffer(buf, 2*1024*1024)
-	for scanner.Scan() {
-		if !onLine(scanner.Bytes()) {
-			break
+	reader := bufio.NewReaderSize(resp.Body, 64*1024)
+	for {
+		line, err := reader.ReadBytes('\n')
+		if len(line) > 0 {
+			if !onLine(line) {
+				return nil
+			}
+		}
+		if err != nil {
+			if err == io.EOF {
+				return nil
+			}
+			return err
 		}
 	}
-	if err := scanner.Err(); err != nil {
-		return err
-	}
-	return nil
 }

internal/deepseek/protocol/sse_test.go

@@ -0,0 +1,26 @@
+package protocol
+
+import (
+	"io"
+	"net/http"
+	"strings"
+	"testing"
+)
+
+func TestScanSSELinesHandlesLongSingleLine(t *testing.T) {
+	payload := strings.Repeat("x", 2*1024*1024+4096)
+	body := "data: {\"p\":\"response/content\",\"v\":\"" + payload + "\"}\n"
+	resp := &http.Response{Body: io.NopCloser(strings.NewReader(body))}
+
+	var got string
+	err := ScanSSELines(resp, func(line []byte) bool {
+		got = string(line)
+		return true
+	})
+	if err != nil {
+		t.Fatalf("ScanSSELines returned error: %v", err)
+	}
+	if !strings.Contains(got, payload) {
+		t.Fatalf("long SSE line was not preserved: got len=%d want payload len=%d", len(got), len(payload))
+	}
+}

internal/devcapture/store.go

@@ -10,6 +10,8 @@ import (
 	"sync"
 	"time"
 
+	"ds2api/internal/util"
+
 	"github.com/google/uuid"
 )
 
@@ -194,7 +196,8 @@ func (c *captureBody) append(chunk string) {
 	}
 	remain := maxLen - current
 	if len(chunk) > remain {
-		c.buf.WriteString(chunk[:remain])
+		truncated, _ := util.TruncateUTF8Bytes(chunk, remain)
+		c.buf.WriteString(truncated)
 		c.truncated = true
 		return
 	}

internal/devcapture/store_test.go

@@ -4,6 +4,7 @@ import (
 	"io"
 	"strings"
 	"testing"
+	"unicode/utf8"
 )
 
 func TestNewFromEnvDefaults(t *testing.T) {
@@ -82,3 +83,28 @@ func TestWrapBodyTruncatesByLimit(t *testing.T) {
 		t.Fatalf("expected account id, got %q", items[0].AccountID)
 	}
 }
+
+func TestWrapBodyTruncatesUTF8WithoutBreakingRune(t *testing.T) {
+	s := &Store{enabled: true, limit: 5, maxBodyBytes: 5}
+	session := s.Start("test", "http://x", "acc1", map[string]any{"x": 1})
+	if session == nil {
+		t.Fatal("expected session")
+	}
+	rc := session.WrapBody(io.NopCloser(strings.NewReader("😀xy")), 200)
+	_, _ = io.ReadAll(rc)
+	_ = rc.Close()
+
+	items := s.Snapshot()
+	if len(items) != 1 {
+		t.Fatalf("expected 1 item, got %d", len(items))
+	}
+	if !utf8.ValidString(items[0].ResponseBody) {
+		t.Fatalf("expected valid utf-8 response body, got %q", items[0].ResponseBody)
+	}
+	if items[0].ResponseBody != "😀x" {
+		t.Fatalf("expected rune-safe truncation, got %q", items[0].ResponseBody)
+	}
+	if !items[0].ResponseTruncated {
+		t.Fatal("expected truncated flag true")
+	}
+}

internal/format/claude/render.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"time"
 
+	"ds2api/internal/prompt"
 	"ds2api/internal/util"
 )
 
@@ -43,8 +44,23 @@ func BuildMessageResponse(messageID, model string, normalizedMessages []any, fin
 		"stop_reason":   stopReason,
 		"stop_sequence": nil,
 		"usage": map[string]any{
-			"input_tokens":  util.EstimateTokens(fmt.Sprintf("%v", normalizedMessages)),
-			"output_tokens": util.EstimateTokens(finalThinking) + util.EstimateTokens(finalText),
+			"input_tokens":  util.CountPromptTokens(prompt.MessagesPrepareWithThinking(claudeMessageMaps(normalizedMessages), false), model),
+			"output_tokens": util.CountOutputTokens(finalThinking, model) + util.CountOutputTokens(finalText, model),
 		},
 	}
 }
+
+func claudeMessageMaps(messages []any) []map[string]any {
+	if len(messages) == 0 {
+		return nil
+	}
+	out := make([]map[string]any, 0, len(messages))
+	for _, item := range messages {
+		msg, ok := item.(map[string]any)
+		if !ok {
+			continue
+		}
+		out = append(out, msg)
+	}
+	return out
+}

internal/format/openai/render_chat.go

@@ -29,7 +29,7 @@ func BuildChatCompletionWithToolCalls(completionID, model, finalPrompt, finalThi
 		"created": time.Now().Unix(),
 		"model":   model,
 		"choices": []map[string]any{{"index": 0, "message": messageObj, "finish_reason": finishReason}},
-		"usage":   BuildChatUsage(finalPrompt, finalThinking, finalText),
+		"usage":   BuildChatUsageForModel(model, finalPrompt, finalThinking, finalText, 0),
 	}
 }
 

internal/format/openai/render_responses.go

@@ -70,7 +70,7 @@ func BuildResponseObjectFromItems(responseID, model, finalPrompt, finalThinking,
 		"model":       model,
 		"output":      output,
 		"output_text": outputText,
-		"usage":       BuildResponsesUsage(finalPrompt, finalThinking, finalText),
+		"usage":       BuildResponsesUsageForModel(model, finalPrompt, finalThinking, finalText, 0),
 	}
 }
 

internal/format/openai/render_test.go

@@ -6,6 +6,7 @@ import (
 	"testing"
 
 	"ds2api/internal/toolcall"
+	"ds2api/internal/util"
 )
 
 func TestBuildResponseObjectKeepsFencedToolPayloadAsText(t *testing.T) {
@@ -177,3 +178,17 @@ func TestBuildResponseObjectWithToolCallsCoercesSchemaDeclaredStringArguments(t
 		t.Fatalf("expected response content stringified by schema, got %#v", args["content"])
 	}
 }
+
+func TestBuildChatUsageForModelUsesConservativePromptCount(t *testing.T) {
+	prompt := strings.Repeat("上下文token ", 40)
+	usage := BuildChatUsageForModel("deepseek-v4-flash", prompt, "", "ok", 0)
+	promptTokens, _ := usage["prompt_tokens"].(int)
+	if promptTokens <= util.EstimateTokens(prompt) {
+		t.Fatalf("expected conservative prompt token count > rough estimate, got=%d estimate=%d", promptTokens, util.EstimateTokens(prompt))
+	}
+	totalTokens, _ := usage["total_tokens"].(int)
+	completionTokens, _ := usage["completion_tokens"].(int)
+	if totalTokens != promptTokens+completionTokens {
+		t.Fatalf("expected total tokens to add up, got usage=%#v", usage)
+	}
+}

internal/format/openai/render_usage.go

@@ -2,10 +2,10 @@ package openai
 
 import "ds2api/internal/util"
 
-func BuildChatUsage(finalPrompt, finalThinking, finalText string) map[string]any {
-	promptTokens := util.EstimateTokens(finalPrompt)
-	reasoningTokens := util.EstimateTokens(finalThinking)
-	completionTokens := util.EstimateTokens(finalText)
+func BuildChatUsageForModel(model, finalPrompt, finalThinking, finalText string, refFileTokens int) map[string]any {
+	promptTokens := util.CountPromptTokens(finalPrompt, model) + refFileTokens
+	reasoningTokens := util.CountOutputTokens(finalThinking, model)
+	completionTokens := util.CountOutputTokens(finalText, model)
 	return map[string]any{
 		"prompt_tokens":     promptTokens,
 		"completion_tokens": reasoningTokens + completionTokens,
@@ -16,13 +16,21 @@ func BuildChatUsage(finalPrompt, finalThinking, finalText string) map[string]any
 	}
 }
 
-func BuildResponsesUsage(finalPrompt, finalThinking, finalText string) map[string]any {
-	promptTokens := util.EstimateTokens(finalPrompt)
-	reasoningTokens := util.EstimateTokens(finalThinking)
-	completionTokens := util.EstimateTokens(finalText)
+func BuildChatUsage(finalPrompt, finalThinking, finalText string) map[string]any {
+	return BuildChatUsageForModel("", finalPrompt, finalThinking, finalText, 0)
+}
+
+func BuildResponsesUsageForModel(model, finalPrompt, finalThinking, finalText string, refFileTokens int) map[string]any {
+	promptTokens := util.CountPromptTokens(finalPrompt, model) + refFileTokens
+	reasoningTokens := util.CountOutputTokens(finalThinking, model)
+	completionTokens := util.CountOutputTokens(finalText, model)
 	return map[string]any{
 		"input_tokens":  promptTokens,
 		"output_tokens": reasoningTokens + completionTokens,
 		"total_tokens":  promptTokens + reasoningTokens + completionTokens,
 	}
 }
+
+func BuildResponsesUsage(finalPrompt, finalThinking, finalText string) map[string]any {
+	return BuildResponsesUsageForModel("", finalPrompt, finalThinking, finalText, 0)
+}

internal/httpapi/admin/accounts/handler_accounts_testing.go

@@ -107,6 +107,7 @@ func (h *Handler) testAccount(ctx context.Context, acc config.Account, model, me
 		"model":           model,
 		"session_count":   0,
 		"config_writable": !h.Store.IsEnvBacked(),
+		"config_warning":  "",
 	}
 	defer func() {
 		status := "failed"
@@ -121,8 +122,7 @@ func (h *Handler) testAccount(ctx context.Context, acc config.Account, model, me
 		return result
 	}
 	if err := h.Store.UpdateAccountToken(acc.Identifier(), token); err != nil {
-		result["message"] = "登录成功但写入运行时 token 失败: " + err.Error()
-		return result
+		result["config_warning"] = "登录成功，但 token 持久化失败（仅保存在内存，重启后会丢失）: " + err.Error()
 	}
 	authCtx := &authn.RequestAuth{UseConfigToken: false, DeepSeekToken: token, AccountID: identifier, Account: acc}
 	proxyCtx := authn.WithAuth(ctx, authCtx)
@@ -136,8 +136,7 @@ func (h *Handler) testAccount(ctx context.Context, acc config.Account, model, me
 		token = newToken
 		authCtx.DeepSeekToken = token
 		if err := h.Store.UpdateAccountToken(acc.Identifier(), token); err != nil {
-			result["message"] = "刷新 token 成功但写入运行时 token 失败: " + err.Error()
-			return result
+			result["config_warning"] = "刷新 token 成功，但 token 持久化失败（仅保存在内存，重启后会丢失）: " + err.Error()
 		}
 		sessionID, err = h.DS.CreateSession(proxyCtx, authCtx, 1)
 		if err != nil {
@@ -155,6 +154,9 @@ func (h *Handler) testAccount(ctx context.Context, acc config.Account, model, me
 	if strings.TrimSpace(message) == "" {
 		result["success"] = true
 		result["message"] = "Token 刷新成功（登录与会话创建成功）"
+		if warning, _ := result["config_warning"].(string); strings.TrimSpace(warning) != "" {
+			result["message"] = result["message"].(string) + "；" + warning
+		}
 		result["response_time"] = int(time.Since(start).Milliseconds())
 		return result
 	}

internal/httpapi/admin/rawsamples/handler_raw_samples.go

@@ -15,6 +15,7 @@ import (
 	"ds2api/internal/devcapture"
 	adminshared "ds2api/internal/httpapi/admin/shared"
 	"ds2api/internal/rawsample"
+	"ds2api/internal/util"
 )
 
 type captureChain struct {
@@ -479,10 +480,13 @@ func previewCaptureChainResponse(chain captureChain) string {
 
 func previewText(text string, limit int) string {
 	text = strings.TrimSpace(text)
-	if limit <= 0 || len(text) <= limit {
+	if limit <= 0 {
 		return text
 	}
-	return text[:limit] + "..."
+	if truncated, ok := util.TruncateRunes(text, limit); ok {
+		return truncated + "..."
+	}
+	return text
 }
 
 func captureChainHasTruncatedResponse(chain captureChain) bool {

internal/httpapi/admin/rawsamples/handler_raw_samples_test.go

@@ -10,6 +10,7 @@ import (
 	"path/filepath"
 	"strings"
 	"testing"
+	"unicode/utf8"
 
 	"ds2api/internal/devcapture"
 )
@@ -231,6 +232,16 @@ func TestCombineCaptureBodiesPreservesOrderAndSeparators(t *testing.T) {
 	}
 }
 
+func TestPreviewTextPreservesUTF8MB4Characters(t *testing.T) {
+	preview := previewText(strings.Repeat("😀", 281), 280)
+	if !utf8.ValidString(preview) {
+		t.Fatalf("expected valid utf-8 preview, got %q", preview)
+	}
+	if preview != strings.Repeat("😀", 280)+"..." {
+		t.Fatalf("unexpected preview: %q", preview)
+	}
+}
+
 func TestQueryRawSampleCapturesGroupsBySessionAndMatchesQuestion(t *testing.T) {
 	devcapture.Global().Clear()
 	defer devcapture.Global().Clear()

internal/httpapi/claude/handler_helpers_misc.go

@@ -1,6 +1,7 @@
 package claude
 
 import (
+	"ds2api/internal/toolcall"
 	"fmt"
 	"strings"
 )
@@ -31,30 +32,9 @@ func extractClaudeToolNames(tools []any) []string {
 }
 
 func extractClaudeToolMeta(m map[string]any) (string, string, any) {
-	name, _ := m["name"].(string)
-	desc, _ := m["description"].(string)
-	schemaObj := m["input_schema"]
-	if schemaObj == nil {
-		schemaObj = m["parameters"]
-	}
-
-	if fn, ok := m["function"].(map[string]any); ok {
-		if strings.TrimSpace(name) == "" {
-			name, _ = fn["name"].(string)
-		}
-		if strings.TrimSpace(desc) == "" {
-			desc, _ = fn["description"].(string)
-		}
-		if schemaObj == nil {
-			if v, ok := fn["input_schema"]; ok {
-				schemaObj = v
-			}
-		}
-		if schemaObj == nil {
-			if v, ok := fn["parameters"]; ok {
-				schemaObj = v
-			}
-		}
+	name, desc, schemaObj := toolcall.ExtractToolMeta(m)
+	if strings.TrimSpace(desc) == "" {
+		desc = "No description available"
 	}
 	return strings.TrimSpace(name), strings.TrimSpace(desc), schemaObj
 }

internal/httpapi/claude/handler_messages.go

@@ -3,12 +3,14 @@ package claude
 import (
 	"bytes"
 	"encoding/json"
+	"errors"
 	"io"
 	"net/http"
 	"net/http/httptest"
 	"strings"
 
 	"ds2api/internal/config"
+	"ds2api/internal/httpapi/requestbody"
 	streamengine "ds2api/internal/stream"
 	"ds2api/internal/translatorcliproxy"
 	"ds2api/internal/util"
@@ -33,7 +35,11 @@ func (h *Handler) Messages(w http.ResponseWriter, r *http.Request) {
 func (h *Handler) proxyViaOpenAI(w http.ResponseWriter, r *http.Request, store ConfigReader) bool {
 	raw, err := io.ReadAll(r.Body)
 	if err != nil {
-		writeClaudeError(w, http.StatusBadRequest, "invalid body")
+		if errors.Is(err, requestbody.ErrInvalidUTF8Body) {
+			writeClaudeError(w, http.StatusBadRequest, "invalid json")
+		} else {
+			writeClaudeError(w, http.StatusBadRequest, "invalid body")
+		}
 		return true
 	}
 	var req map[string]any
@@ -177,7 +183,7 @@ func stripClaudeThinkingBlocks(raw []byte) []byte {
 	return out
 }
 
-func (h *Handler) handleClaudeStreamRealtime(w http.ResponseWriter, r *http.Request, resp *http.Response, model string, messages []any, thinkingEnabled, searchEnabled bool, toolNames []string) {
+func (h *Handler) handleClaudeStreamRealtime(w http.ResponseWriter, r *http.Request, resp *http.Response, model string, messages []any, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any) {
 	defer func() { _ = resp.Body.Close() }()
 	if resp.StatusCode != http.StatusOK {
 		body, _ := io.ReadAll(resp.Body)
@@ -205,6 +211,8 @@ func (h *Handler) handleClaudeStreamRealtime(w http.ResponseWriter, r *http.Requ
 		searchEnabled,
 		h.compatStripReferenceMarkers(),
 		toolNames,
+		toolsRaw,
+		buildClaudePromptTokenText(messages, thinkingEnabled),
 	)
 	streamRuntime.sendMessageStart()
 

internal/httpapi/claude/handler_stream_test.go

@@ -81,7 +81,7 @@ func TestHandleClaudeStreamRealtimeTextIncrementsWithEventHeaders(t *testing.T)
 	rec := httptest.NewRecorder()
 	req := httptest.NewRequest(http.MethodPost, "/anthropic/v1/messages", nil)
 
-	h.handleClaudeStreamRealtime(rec, req, resp, "claude-sonnet-4-5", []any{map[string]any{"role": "user", "content": "hi"}}, false, false, nil)
+	h.handleClaudeStreamRealtime(rec, req, resp, "claude-sonnet-4-5", []any{map[string]any{"role": "user", "content": "hi"}}, false, false, nil, nil)
 
 	body := rec.Body.String()
 	if !strings.Contains(body, "event: message_start") {
@@ -122,7 +122,7 @@ func TestHandleClaudeStreamRealtimeThinkingDelta(t *testing.T) {
 	rec := httptest.NewRecorder()
 	req := httptest.NewRequest(http.MethodPost, "/anthropic/v1/messages", nil)
 
-	h.handleClaudeStreamRealtime(rec, req, resp, "claude-sonnet-4-5", []any{map[string]any{"role": "user", "content": "hi"}}, true, false, nil)
+	h.handleClaudeStreamRealtime(rec, req, resp, "claude-sonnet-4-5", []any{map[string]any{"role": "user", "content": "hi"}}, true, false, nil, nil)
 
 	frames := parseClaudeFrames(t, rec.Body.String())
 	foundThinkingDelta := false
@@ -149,7 +149,7 @@ func TestHandleClaudeStreamRealtimeSkipsThinkingFallbackWhenFinalTextExists(t *t
 	rec := httptest.NewRecorder()
 	req := httptest.NewRequest(http.MethodPost, "/anthropic/v1/messages", nil)
 
-	h.handleClaudeStreamRealtime(rec, req, resp, "claude-sonnet-4-5", []any{map[string]any{"role": "user", "content": "use tool"}}, true, false, []string{"search"})
+	h.handleClaudeStreamRealtime(rec, req, resp, "claude-sonnet-4-5", []any{map[string]any{"role": "user", "content": "use tool"}}, true, false, []string{"search"}, nil)
 
 	frames := parseClaudeFrames(t, rec.Body.String())
 	for _, f := range findClaudeFrames(frames, "content_block_start") {
@@ -180,7 +180,7 @@ func TestHandleClaudeStreamRealtimeUpstreamErrorEvent(t *testing.T) {
 	rec := httptest.NewRecorder()
 	req := httptest.NewRequest(http.MethodPost, "/anthropic/v1/messages", nil)
 
-	h.handleClaudeStreamRealtime(rec, req, resp, "claude-sonnet-4-5", []any{map[string]any{"role": "user", "content": "hi"}}, false, false, nil)
+	h.handleClaudeStreamRealtime(rec, req, resp, "claude-sonnet-4-5", []any{map[string]any{"role": "user", "content": "hi"}}, false, false, nil, nil)
 
 	frames := parseClaudeFrames(t, rec.Body.String())
 	errFrames := findClaudeFrames(frames, "error")
@@ -217,7 +217,7 @@ func TestHandleClaudeStreamRealtimePingEvent(t *testing.T) {
 
 	rec := httptest.NewRecorder()
 	req := httptest.NewRequest(http.MethodPost, "/anthropic/v1/messages", nil)
-	h.handleClaudeStreamRealtime(rec, req, resp, "claude-sonnet-4-5", []any{map[string]any{"role": "user", "content": "hi"}}, false, false, nil)
+	h.handleClaudeStreamRealtime(rec, req, resp, "claude-sonnet-4-5", []any{map[string]any{"role": "user", "content": "hi"}}, false, false, nil, nil)
 
 	frames := parseClaudeFrames(t, rec.Body.String())
 	if len(findClaudeFrames(frames, "ping")) == 0 {
@@ -271,7 +271,7 @@ func TestHandleClaudeStreamRealtimeToolSafetyAcrossStructuredFormats(t *testing.
 			rec := httptest.NewRecorder()
 			req := httptest.NewRequest(http.MethodPost, "/anthropic/v1/messages", nil)
 
-			h.handleClaudeStreamRealtime(rec, req, resp, "claude-sonnet-4-5", []any{map[string]any{"role": "user", "content": "use tool"}}, false, false, []string{"Bash"})
+			h.handleClaudeStreamRealtime(rec, req, resp, "claude-sonnet-4-5", []any{map[string]any{"role": "user", "content": "use tool"}}, false, false, []string{"Bash"}, nil)
 
 			frames := parseClaudeFrames(t, rec.Body.String())
 			foundToolUse := false
@@ -299,7 +299,7 @@ func TestHandleClaudeStreamRealtimeDetectsToolUseWithLeadingProse(t *testing.T)
 	rec := httptest.NewRecorder()
 	req := httptest.NewRequest(http.MethodPost, "/anthropic/v1/messages", nil)
 
-	h.handleClaudeStreamRealtime(rec, req, resp, "claude-sonnet-4-5", []any{map[string]any{"role": "user", "content": "use tool"}}, false, false, []string{"write_file"})
+	h.handleClaudeStreamRealtime(rec, req, resp, "claude-sonnet-4-5", []any{map[string]any{"role": "user", "content": "use tool"}}, false, false, []string{"write_file"}, nil)
 
 	frames := parseClaudeFrames(t, rec.Body.String())
 	foundToolUse := false
@@ -333,7 +333,7 @@ func TestHandleClaudeStreamRealtimeIgnoresUnclosedFencedToolExample(t *testing.T
 	rec := httptest.NewRecorder()
 	req := httptest.NewRequest(http.MethodPost, "/anthropic/v1/messages", nil)
 
-	h.handleClaudeStreamRealtime(rec, req, resp, "claude-sonnet-4-5", []any{map[string]any{"role": "user", "content": "show example only"}}, false, false, []string{"Bash"})
+	h.handleClaudeStreamRealtime(rec, req, resp, "claude-sonnet-4-5", []any{map[string]any{"role": "user", "content": "show example only"}}, false, false, []string{"Bash"}, nil)
 
 	frames := parseClaudeFrames(t, rec.Body.String())
 	foundToolUse := false
@@ -365,3 +365,48 @@ func TestHandleClaudeStreamRealtimeIgnoresUnclosedFencedToolExample(t *testing.T
 func TestHandleClaudeStreamRealtimePromotesUnclosedFencedToolExample(t *testing.T) {
 	TestHandleClaudeStreamRealtimeIgnoresUnclosedFencedToolExample(t)
 }
+
+func TestHandleClaudeStreamRealtimeNormalizesToolInputBySchema(t *testing.T) {
+	h := &Handler{}
+	resp := makeClaudeSSEHTTPResponse(
+		`data: {"p":"response/content","v":"<tool_calls><invoke name=\"Write\">{\"input\":{\"content\":{\"message\":\"hi\"},\"taskId\":1}}</invoke></tool_calls>"}`,
+		`data: [DONE]`,
+	)
+	rec := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodPost, "/anthropic/v1/messages", nil)
+	toolsRaw := []any{
+		map[string]any{
+			"name": "Write",
+			"inputSchema": map[string]any{
+				"type": "object",
+				"properties": map[string]any{
+					"content": map[string]any{"type": "string"},
+					"taskId":  map[string]any{"type": "string"},
+				},
+			},
+		},
+	}
+
+	h.handleClaudeStreamRealtime(rec, req, resp, "claude-sonnet-4-5", []any{map[string]any{"role": "user", "content": "write"}}, false, false, []string{"Write"}, toolsRaw)
+
+	frames := parseClaudeFrames(t, rec.Body.String())
+	for _, f := range findClaudeFrames(frames, "content_block_delta") {
+		delta, _ := f.Payload["delta"].(map[string]any)
+		if delta["type"] != "input_json_delta" {
+			continue
+		}
+		partial := asString(delta["partial_json"])
+		var args map[string]any
+		if err := json.Unmarshal([]byte(partial), &args); err != nil {
+			t.Fatalf("decode partial_json failed: %v payload=%s", err, partial)
+		}
+		if args["content"] != `{"message":"hi"}` {
+			t.Fatalf("expected content normalized to string, got %#v", args["content"])
+		}
+		if args["taskId"] != "1" {
+			t.Fatalf("expected taskId normalized to string, got %#v", args["taskId"])
+		}
+		return
+	}
+	t.Fatalf("expected input_json_delta frame, body=%s", rec.Body.String())
+}

internal/httpapi/claude/handler_tokens.go

@@ -3,8 +3,6 @@ package claude
 import (
 	"encoding/json"
 	"net/http"
-
-	"ds2api/internal/util"
 )
 
 func (h *Handler) CountTokens(w http.ResponseWriter, r *http.Request) {
@@ -26,26 +24,11 @@ func (h *Handler) CountTokens(w http.ResponseWriter, r *http.Request) {
 		writeClaudeError(w, http.StatusBadRequest, "Request must include 'model' and 'messages'.")
 		return
 	}
-	inputTokens := 0
-	if sys, ok := req["system"].(string); ok {
-		inputTokens += util.EstimateTokens(sys)
-	}
-	for _, item := range messages {
-		msg, ok := item.(map[string]any)
-		if !ok {
-			continue
-		}
-		inputTokens += 2
-		inputTokens += util.EstimateTokens(extractMessageContent(msg["content"]))
-	}
-	if tools, ok := req["tools"].([]any); ok {
-		for _, t := range tools {
-			b, _ := json.Marshal(t)
-			inputTokens += util.EstimateTokens(string(b))
-		}
-	}
-	if inputTokens < 1 {
-		inputTokens = 1
+	normalized, err := normalizeClaudeRequest(h.Store, req)
+	if err != nil {
+		writeClaudeError(w, http.StatusBadRequest, err.Error())
+		return
 	}
+	inputTokens := countClaudeInputTokens(normalized.Standard)
 	writeJSON(w, http.StatusOK, map[string]any{"input_tokens": inputTokens})
 }

internal/httpapi/claude/prompt_token_text.go

@@ -0,0 +1,7 @@
+package claude
+
+import "ds2api/internal/prompt"
+
+func buildClaudePromptTokenText(messages []any, thinkingEnabled bool) string {
+	return prompt.MessagesPrepareWithThinking(toMessageMaps(messages), thinkingEnabled)
+}

internal/httpapi/claude/standard_request.go

@@ -48,16 +48,18 @@ func normalizeClaudeRequest(store ConfigReader, req map[string]any) (claudeNorma
 
 	return claudeNormalizedRequest{
 		Standard: promptcompat.StandardRequest{
-			Surface:        "anthropic_messages",
-			RequestedModel: strings.TrimSpace(model),
-			ResolvedModel:  dsModel,
-			ResponseModel:  strings.TrimSpace(model),
-			Messages:       payload["messages"].([]any),
-			FinalPrompt:    finalPrompt,
-			ToolNames:      toolNames,
-			Stream:         util.ToBool(req["stream"]),
-			Thinking:       thinkingEnabled,
-			Search:         searchEnabled,
+			Surface:         "anthropic_messages",
+			RequestedModel:  strings.TrimSpace(model),
+			ResolvedModel:   dsModel,
+			ResponseModel:   strings.TrimSpace(model),
+			Messages:        payload["messages"].([]any),
+			PromptTokenText: finalPrompt,
+			ToolsRaw:        toolsRequested,
+			FinalPrompt:     finalPrompt,
+			ToolNames:       toolNames,
+			Stream:          util.ToBool(req["stream"]),
+			Thinking:        thinkingEnabled,
+			Search:          searchEnabled,
 		},
 		NormalizedMessages: normalizedMessages,
 	}, nil

internal/httpapi/claude/standard_request_test.go

@@ -32,11 +32,39 @@ func TestNormalizeClaudeRequest(t *testing.T) {
 	if len(norm.Standard.ToolNames) == 0 {
 		t.Fatalf("expected tool names")
 	}
+	if norm.Standard.ToolsRaw == nil {
+		t.Fatalf("expected ToolsRaw preserved for downstream normalization")
+	}
 	if norm.Standard.FinalPrompt == "" {
 		t.Fatalf("expected non-empty final prompt")
 	}
 }
 
+func TestNormalizeClaudeRequestSupportsCamelCaseInputSchemaPromptInjection(t *testing.T) {
+	t.Setenv("DS2API_CONFIG_JSON", `{}`)
+	store := config.LoadStore()
+	req := map[string]any{
+		"model": "claude-sonnet-4-5",
+		"messages": []any{
+			map[string]any{"role": "user", "content": "hello"},
+		},
+		"tools": []any{
+			map[string]any{
+				"name":        "todowrite",
+				"description": "Write todos",
+				"inputSchema": map[string]any{"type": "object", "properties": map[string]any{"todos": map[string]any{"type": "array"}}},
+			},
+		},
+	}
+	norm, err := normalizeClaudeRequest(store, req)
+	if err != nil {
+		t.Fatalf("normalize failed: %v", err)
+	}
+	if !containsStr(norm.Standard.FinalPrompt, `"type":"array"`) {
+		t.Fatalf("expected inputSchema to be injected into prompt, got=%q", norm.Standard.FinalPrompt)
+	}
+}
+
 func TestNormalizeClaudeRequestInjectsToolsIntoExistingSystemMessage(t *testing.T) {
 	t.Setenv("DS2API_CONFIG_JSON", `{}`)
 	store := config.LoadStore()

internal/httpapi/claude/stream_runtime_core.go

@@ -15,9 +15,11 @@ type claudeStreamRuntime struct {
 	rc       *http.ResponseController
 	canFlush bool
 
-	model     string
-	toolNames []string
-	messages  []any
+	model           string
+	toolNames       []string
+	messages        []any
+	toolsRaw        any
+	promptTokenText string
 
 	thinkingEnabled       bool
 	searchEnabled         bool
@@ -47,6 +49,8 @@ func newClaudeStreamRuntime(
 	searchEnabled bool,
 	stripReferenceMarkers bool,
 	toolNames []string,
+	toolsRaw any,
+	promptTokenText string,
 ) *claudeStreamRuntime {
 	return &claudeStreamRuntime{
 		w:                     w,
@@ -59,6 +63,8 @@ func newClaudeStreamRuntime(
 		bufferToolContent:     len(toolNames) > 0,
 		stripReferenceMarkers: stripReferenceMarkers,
 		toolNames:             toolNames,
+		toolsRaw:              toolsRaw,
+		promptTokenText:       promptTokenText,
 		messageID:             fmt.Sprintf("msg_%d", time.Now().UnixNano()),
 		thinkingBlockIndex:    -1,
 		textBlockIndex:        -1,

internal/httpapi/claude/stream_runtime_emit.go

@@ -42,7 +42,10 @@ func (s *claudeStreamRuntime) sendPing() {
 }
 
 func (s *claudeStreamRuntime) sendMessageStart() {
-	inputTokens := util.EstimateTokens(fmt.Sprintf("%v", s.messages))
+	inputTokens := countClaudeInputTokensFromText(s.promptTokenText, s.model)
+	if inputTokens == 0 {
+		inputTokens = util.CountPromptTokens(fmt.Sprintf("%v", s.messages), s.model)
+	}
 	s.send("message_start", map[string]any{
 		"type": "message_start",
 		"message": map[string]any{

internal/httpapi/claude/stream_runtime_finalize.go

@@ -52,6 +52,7 @@ func (s *claudeStreamRuntime) finalize(stopReason string) {
 			detected = toolcall.ParseStandaloneToolCalls(finalThinking, s.toolNames)
 		}
 		if len(detected) > 0 {
+			detected = toolcall.NormalizeParsedToolCallsForSchemas(detected, s.toolsRaw)
 			stopReason = "tool_use"
 			for i, tc := range detected {
 				idx := s.nextBlockIndex + i
@@ -108,7 +109,7 @@ func (s *claudeStreamRuntime) finalize(stopReason string) {
 		}
 	}
 
-	outputTokens := util.EstimateTokens(finalThinking) + util.EstimateTokens(finalText)
+	outputTokens := util.CountOutputTokens(finalThinking, s.model) + util.CountOutputTokens(finalText, s.model)
 	s.send("message_delta", map[string]any{
 		"type": "message_delta",
 		"delta": map[string]any{

internal/httpapi/claude/token_count.go

@@ -0,0 +1,20 @@
+package claude
+
+import (
+	"strings"
+
+	"ds2api/internal/promptcompat"
+	"ds2api/internal/util"
+)
+
+func countClaudeInputTokens(stdReq promptcompat.StandardRequest) int {
+	promptText := stdReq.PromptTokenText
+	if strings.TrimSpace(promptText) == "" {
+		promptText = stdReq.FinalPrompt
+	}
+	return countClaudeInputTokensFromText(promptText, stdReq.ResolvedModel)
+}
+
+func countClaudeInputTokensFromText(promptText, model string) int {
+	return util.CountPromptTokens(promptText, model)
+}

internal/httpapi/gemini/convert_request.go

@@ -36,16 +36,17 @@ func normalizeGeminiRequest(store ConfigReader, routeModel string, req map[strin
 	passThrough := collectGeminiPassThrough(req)
 
 	return promptcompat.StandardRequest{
-		Surface:        "google_gemini",
-		RequestedModel: requestedModel,
-		ResolvedModel:  resolvedModel,
-		ResponseModel:  requestedModel,
-		Messages:       messagesRaw,
-		FinalPrompt:    finalPrompt,
-		ToolNames:      toolNames,
-		Stream:         stream,
-		Thinking:       thinkingEnabled,
-		Search:         searchEnabled,
-		PassThrough:    passThrough,
+		Surface:         "google_gemini",
+		RequestedModel:  requestedModel,
+		ResolvedModel:   resolvedModel,
+		ResponseModel:   requestedModel,
+		Messages:        messagesRaw,
+		PromptTokenText: finalPrompt,
+		FinalPrompt:     finalPrompt,
+		ToolNames:       toolNames,
+		Stream:          stream,
+		Thinking:        thinkingEnabled,
+		Search:          searchEnabled,
+		PassThrough:     passThrough,
 	}, nil
 }

internal/httpapi/gemini/handler_generate.go

@@ -2,8 +2,8 @@ package gemini
 
 import (
 	"bytes"
-	"ds2api/internal/toolcall"
 	"encoding/json"
+	"errors"
 	"io"
 	"net/http"
 	"net/http/httptest"
@@ -11,7 +11,9 @@ import (
 
 	"github.com/go-chi/chi/v5"
 
+	"ds2api/internal/httpapi/requestbody"
 	"ds2api/internal/sse"
+	"ds2api/internal/toolcall"
 	"ds2api/internal/translatorcliproxy"
 	"ds2api/internal/util"
 
@@ -32,7 +34,11 @@ func (h *Handler) handleGenerateContent(w http.ResponseWriter, r *http.Request,
 func (h *Handler) proxyViaOpenAI(w http.ResponseWriter, r *http.Request, stream bool) bool {
 	raw, err := io.ReadAll(r.Body)
 	if err != nil {
-		writeGeminiError(w, http.StatusBadRequest, "invalid body")
+		if errors.Is(err, requestbody.ErrInvalidUTF8Body) {
+			writeGeminiError(w, http.StatusBadRequest, "invalid json")
+		} else {
+			writeGeminiError(w, http.StatusBadRequest, "invalid body")
+		}
 		return true
 	}
 	routeModel := strings.TrimSpace(chi.URLParam(r, "model"))
@@ -227,7 +233,7 @@ func (h *Handler) handleNonStreamGenerateContent(w http.ResponseWriter, resp *ht
 //nolint:unused // retained for native Gemini non-stream handling path.
 func buildGeminiGenerateContentResponse(model, finalPrompt, finalThinking, finalText string, toolNames []string) map[string]any {
 	parts := buildGeminiPartsFromFinal(finalText, finalThinking, toolNames)
-	usage := buildGeminiUsage(finalPrompt, finalThinking, finalText)
+	usage := buildGeminiUsage(model, finalPrompt, finalThinking, finalText)
 	return map[string]any{
 		"candidates": []map[string]any{
 			{
@@ -245,10 +251,10 @@ func buildGeminiGenerateContentResponse(model, finalPrompt, finalThinking, final
 }
 
 //nolint:unused // retained for native Gemini non-stream handling path.
-func buildGeminiUsage(finalPrompt, finalThinking, finalText string) map[string]any {
-	promptTokens := util.EstimateTokens(finalPrompt)
-	reasoningTokens := util.EstimateTokens(finalThinking)
-	completionTokens := util.EstimateTokens(finalText)
+func buildGeminiUsage(model, finalPrompt, finalThinking, finalText string) map[string]any {
+	promptTokens := util.CountPromptTokens(finalPrompt, model)
+	reasoningTokens := util.CountOutputTokens(finalThinking, model)
+	completionTokens := util.CountOutputTokens(finalText, model)
 	return map[string]any{
 		"promptTokenCount":     promptTokens,
 		"candidatesTokenCount": reasoningTokens + completionTokens,

internal/httpapi/gemini/handler_stream_runtime.go

@@ -194,6 +194,6 @@ func (s *geminiStreamRuntime) finalize() {
 			},
 		},
 		"modelVersion":  s.model,
-		"usageMetadata": buildGeminiUsage(s.finalPrompt, finalThinking, finalText),
+		"usageMetadata": buildGeminiUsage(s.model, s.finalPrompt, finalThinking, finalText),
 	})
 }

internal/httpapi/openai/chat/chat_history_test.go

@@ -126,6 +126,7 @@ func TestStartChatHistoryRecoversFromTransientWriteFailure(t *testing.T) {
 	session := startChatHistory(historyStore, req, a, stdReq)
 	if session == nil {
 		t.Fatalf("expected session even when initial persistence fails")
+		return
 	}
 	if session.disabled {
 		t.Fatalf("expected session to remain active after transient start failure")
@@ -194,7 +195,7 @@ func TestHandleStreamContextCancelledMarksHistoryStopped(t *testing.T) {
 	rec := httptest.NewRecorder()
 	resp := makeOpenAISSEHTTPResponse(`data: {"p":"response/content","v":"hello"}`, `data: [DONE]`)
 
-	h.handleStream(rec, req, resp, "cid-stop", "deepseek-v4-flash", "prompt", false, false, nil, nil, session)
+	h.handleStream(rec, req, resp, "cid-stop", "deepseek-v4-flash", "prompt", 0, false, false, nil, nil, session)
 
 	snapshot, err := historyStore.Snapshot()
 	if err != nil {
@@ -307,19 +308,19 @@ func TestChatCompletionsCurrentInputFilePersistsNeutralPrompt(t *testing.T) {
 	if err != nil {
 		t.Fatalf("expected detail item, got %v", err)
 	}
-	if full.HistoryText != "" {
-		t.Fatalf("expected current input file flow to leave history text empty, got %q", full.HistoryText)
-	}
 	if len(ds.uploadCalls) != 1 {
 		t.Fatalf("expected current input upload to happen, got %d", len(ds.uploadCalls))
 	}
-	if ds.uploadCalls[0].Filename != "IGNORE.txt" {
-		t.Fatalf("expected IGNORE.txt upload, got %q", ds.uploadCalls[0].Filename)
+	if ds.uploadCalls[0].Filename != "DS2API_HISTORY.txt" {
+		t.Fatalf("expected DS2API_HISTORY.txt upload, got %q", ds.uploadCalls[0].Filename)
+	}
+	if full.HistoryText != string(ds.uploadCalls[0].Data) {
+		t.Fatalf("expected uploaded current input file to be persisted in history text")
 	}
 	if len(full.Messages) != 1 {
-		t.Fatalf("expected neutral prompt to be the only persisted message, got %#v", full.Messages)
+		t.Fatalf("expected continuation prompt to be the only persisted message, got %#v", full.Messages)
 	}
-	if !strings.Contains(full.Messages[0].Content, "Answer the latest user request directly.") {
-		t.Fatalf("expected neutral prompt to be persisted, got %#v", full.Messages[0])
+	if !strings.Contains(full.Messages[0].Content, "Continue from the latest state in the attached DS2API_HISTORY.txt context.") {
+		t.Fatalf("expected continuation prompt to be persisted, got %#v", full.Messages[0])
 	}
 }

internal/httpapi/openai/chat/chat_stream_runtime.go

@@ -16,12 +16,13 @@ type chatStreamRuntime struct {
 	rc       *http.ResponseController
 	canFlush bool
 
-	completionID string
-	created      int64
-	model        string
-	finalPrompt  string
-	toolNames    []string
-	toolsRaw     any
+	completionID  string
+	created       int64
+	model         string
+	finalPrompt   string
+	refFileTokens int
+	toolNames     []string
+	toolsRaw      any
 
 	thinkingEnabled       bool
 	searchEnabled         bool
@@ -36,8 +37,10 @@ type chatStreamRuntime struct {
 	toolSieve             toolstream.State
 	streamToolCallIDs     map[int]string
 	streamToolNames       map[int]string
+	rawThinking           strings.Builder
 	thinking              strings.Builder
 	toolDetectionThinking strings.Builder
+	rawText               strings.Builder
 	text                  strings.Builder
 	responseMessageID     int
 
@@ -50,6 +53,32 @@ type chatStreamRuntime struct {
 	finalErrorCode    string
 }
 
+type chatDeltaBatch struct {
+	runtime *chatStreamRuntime
+	field   string
+	text    strings.Builder
+}
+
+func (b *chatDeltaBatch) append(field, text string) {
+	if text == "" {
+		return
+	}
+	if b.field != "" && b.field != field {
+		b.flush()
+	}
+	b.field = field
+	b.text.WriteString(text)
+}
+
+func (b *chatDeltaBatch) flush() {
+	if b.field == "" || b.text.Len() == 0 {
+		return
+	}
+	b.runtime.sendDelta(map[string]any{b.field: b.text.String()})
+	b.field = ""
+	b.text.Reset()
+}
+
 func newChatStreamRuntime(
 	w http.ResponseWriter,
 	rc *http.ResponseController,
@@ -104,6 +133,23 @@ func (s *chatStreamRuntime) sendChunk(v any) {
 	}
 }
 
+func (s *chatStreamRuntime) sendDelta(delta map[string]any) {
+	if len(delta) == 0 {
+		return
+	}
+	if !s.firstChunkSent {
+		delta["role"] = "assistant"
+		s.firstChunkSent = true
+	}
+	s.sendChunk(openaifmt.BuildChatStreamChunk(
+		s.completionID,
+		s.created,
+		s.model,
+		[]map[string]any{openaifmt.BuildChatStreamDeltaChoice(0, delta)},
+		nil,
+	))
+}
+
 func (s *chatStreamRuntime) sendDone() {
 	_, _ = s.w.Write([]byte("data: [DONE]\n\n"))
 	if s.canFlush {
@@ -127,6 +173,15 @@ func (s *chatStreamRuntime) sendFailedChunk(status int, message, code string) {
 	s.sendDone()
 }
 
+func (s *chatStreamRuntime) markContextCancelled() {
+	s.finalErrorStatus = 499
+	s.finalErrorMessage = "request context cancelled"
+	s.finalErrorCode = string(streamengine.StopReasonContextCancelled)
+	s.finalThinking = s.thinking.String()
+	s.finalText = cleanVisibleOutput(s.text.String(), s.stripReferenceMarkers)
+	s.finalFinishReason = string(streamengine.StopReasonContextCancelled)
+}
+
 func (s *chatStreamRuntime) resetStreamToolCallState() {
 	s.streamToolCallIDs = map[int]string{}
 	s.streamToolNames = map[int]string{}
@@ -141,69 +196,37 @@ func (s *chatStreamRuntime) finalize(finishReason string, deferEmptyOutput bool)
 	finalText := cleanVisibleOutput(s.text.String(), s.stripReferenceMarkers)
 	s.finalThinking = finalThinking
 	s.finalText = finalText
-	detected := detectAssistantToolCalls(finalText, finalThinking, finalToolDetectionThinking, s.toolNames)
+	detected := detectAssistantToolCalls(s.rawText.String(), finalText, s.rawThinking.String(), finalToolDetectionThinking, s.toolNames)
 	if len(detected.Calls) > 0 && !s.toolCallsDoneEmitted {
 		finishReason = "tool_calls"
-		delta := map[string]any{
+		s.sendDelta(map[string]any{
 			"tool_calls": formatFinalStreamToolCallsWithStableIDs(detected.Calls, s.streamToolCallIDs, s.toolsRaw),
-		}
-		if !s.firstChunkSent {
-			delta["role"] = "assistant"
-			s.firstChunkSent = true
-		}
-		s.sendChunk(openaifmt.BuildChatStreamChunk(
-			s.completionID,
-			s.created,
-			s.model,
-			[]map[string]any{openaifmt.BuildChatStreamDeltaChoice(0, delta)},
-			nil,
-		))
+		})
 		s.toolCallsEmitted = true
 		s.toolCallsDoneEmitted = true
 	} else if s.bufferToolContent {
+		batch := chatDeltaBatch{runtime: s}
 		for _, evt := range toolstream.Flush(&s.toolSieve, s.toolNames) {
 			if len(evt.ToolCalls) > 0 {
+				batch.flush()
 				finishReason = "tool_calls"
 				s.toolCallsEmitted = true
 				s.toolCallsDoneEmitted = true
-				tcDelta := map[string]any{
+				s.sendDelta(map[string]any{
 					"tool_calls": formatFinalStreamToolCallsWithStableIDs(evt.ToolCalls, s.streamToolCallIDs, s.toolsRaw),
-				}
-				if !s.firstChunkSent {
-					tcDelta["role"] = "assistant"
-					s.firstChunkSent = true
-				}
-				s.sendChunk(openaifmt.BuildChatStreamChunk(
-					s.completionID,
-					s.created,
-					s.model,
-					[]map[string]any{openaifmt.BuildChatStreamDeltaChoice(0, tcDelta)},
-					nil,
-				))
+				})
 				s.resetStreamToolCallState()
 			}
 			if evt.Content == "" {
 				continue
 			}
 			cleaned := cleanVisibleOutput(evt.Content, s.stripReferenceMarkers)
-			if cleaned == "" {
+			if cleaned == "" || (s.searchEnabled && sse.IsCitation(cleaned)) {
 				continue
 			}
-			delta := map[string]any{
-				"content": cleaned,
-			}
-			if !s.firstChunkSent {
-				delta["role"] = "assistant"
-				s.firstChunkSent = true
-			}
-			s.sendChunk(openaifmt.BuildChatStreamChunk(
-				s.completionID,
-				s.created,
-				s.model,
-				[]map[string]any{openaifmt.BuildChatStreamDeltaChoice(0, delta)},
-				nil,
-			))
+			batch.append("content", cleaned)
 		}
+		batch.flush()
 	}
 
 	if len(detected.Calls) > 0 || s.toolCallsEmitted {
@@ -220,7 +243,7 @@ func (s *chatStreamRuntime) finalize(finishReason string, deferEmptyOutput bool)
 		s.sendFailedChunk(status, message, code)
 		return true
 	}
-	usage := openaifmt.BuildChatUsage(s.finalPrompt, finalThinking, finalText)
+	usage := openaifmt.BuildChatUsageForModel(s.model, s.finalPrompt, finalThinking, finalText, s.refFileTokens)
 	s.finalFinishReason = finishReason
 	s.finalUsage = usage
 	s.sendChunk(openaifmt.BuildChatStreamChunk(
@@ -254,8 +277,8 @@ func (s *chatStreamRuntime) onParsed(parsed sse.LineResult) streamengine.ParsedD
 		return streamengine.ParsedDecision{Stop: true, StopReason: streamengine.StopReasonHandlerRequested}
 	}
 
-	newChoices := make([]map[string]any, 0, len(parsed.Parts))
 	contentSeen := false
+	batch := chatDeltaBatch{runtime: s}
 	for _, p := range parsed.ToolDetectionThinkingParts {
 		trimmed := sse.TrimContinuationOverlap(s.toolDetectionThinking.String(), p.Text)
 		if trimmed != "" {
@@ -263,38 +286,46 @@ func (s *chatStreamRuntime) onParsed(parsed sse.LineResult) streamengine.ParsedD
 		}
 	}
 	for _, p := range parsed.Parts {
-		cleanedText := cleanVisibleOutput(p.Text, s.stripReferenceMarkers)
-		if s.searchEnabled && sse.IsCitation(cleanedText) {
-			continue
-		}
-		if cleanedText == "" {
-			continue
-		}
-		contentSeen = true
-		delta := map[string]any{}
-		if !s.firstChunkSent {
-			delta["role"] = "assistant"
-			s.firstChunkSent = true
-		}
 		if p.Type == "thinking" {
+			rawTrimmed := sse.TrimContinuationOverlap(s.rawThinking.String(), p.Text)
+			if rawTrimmed != "" {
+				s.rawThinking.WriteString(rawTrimmed)
+				contentSeen = true
+			}
 			if s.thinkingEnabled {
+				cleanedText := cleanVisibleOutput(rawTrimmed, s.stripReferenceMarkers)
+				if cleanedText == "" {
+					continue
+				}
 				trimmed := sse.TrimContinuationOverlap(s.thinking.String(), cleanedText)
 				if trimmed == "" {
 					continue
 				}
 				s.thinking.WriteString(trimmed)
-				delta["reasoning_content"] = trimmed
+				batch.append("reasoning_content", trimmed)
 			}
 		} else {
-			trimmed := sse.TrimContinuationOverlap(s.text.String(), cleanedText)
-			if trimmed == "" {
+			rawTrimmed := sse.TrimContinuationOverlap(s.rawText.String(), p.Text)
+			if rawTrimmed == "" {
 				continue
 			}
-			s.text.WriteString(trimmed)
+			s.rawText.WriteString(rawTrimmed)
+			contentSeen = true
+			cleanedText := cleanVisibleOutput(rawTrimmed, s.stripReferenceMarkers)
+			if s.searchEnabled && sse.IsCitation(cleanedText) {
+				continue
+			}
+			trimmed := sse.TrimContinuationOverlap(s.text.String(), cleanedText)
+			if trimmed != "" {
+				s.text.WriteString(trimmed)
+			}
 			if !s.bufferToolContent {
-				delta["content"] = trimmed
+				if trimmed == "" {
+					continue
+				}
+				batch.append("content", trimmed)
 			} else {
-				events := toolstream.ProcessChunk(&s.toolSieve, trimmed, s.toolNames)
+				events := toolstream.ProcessChunk(&s.toolSieve, rawTrimmed, s.toolNames)
 				for _, evt := range events {
 					if len(evt.ToolCallDeltas) > 0 {
 						if !s.emitEarlyToolDeltas {
@@ -308,55 +339,36 @@ func (s *chatStreamRuntime) onParsed(parsed sse.LineResult) streamengine.ParsedD
 						if len(formatted) == 0 {
 							continue
 						}
+						batch.flush()
 						tcDelta := map[string]any{
 							"tool_calls": formatted,
 						}
 						s.toolCallsEmitted = true
-						if !s.firstChunkSent {
-							tcDelta["role"] = "assistant"
-							s.firstChunkSent = true
-						}
-						newChoices = append(newChoices, openaifmt.BuildChatStreamDeltaChoice(0, tcDelta))
+						s.sendDelta(tcDelta)
 						continue
 					}
 					if len(evt.ToolCalls) > 0 {
+						batch.flush()
 						s.toolCallsEmitted = true
 						s.toolCallsDoneEmitted = true
 						tcDelta := map[string]any{
 							"tool_calls": formatFinalStreamToolCallsWithStableIDs(evt.ToolCalls, s.streamToolCallIDs, s.toolsRaw),
 						}
-						if !s.firstChunkSent {
-							tcDelta["role"] = "assistant"
-							s.firstChunkSent = true
-						}
-						newChoices = append(newChoices, openaifmt.BuildChatStreamDeltaChoice(0, tcDelta))
+						s.sendDelta(tcDelta)
 						s.resetStreamToolCallState()
 						continue
 					}
 					if evt.Content != "" {
 						cleaned := cleanVisibleOutput(evt.Content, s.stripReferenceMarkers)
-						if cleaned == "" {
+						if cleaned == "" || (s.searchEnabled && sse.IsCitation(cleaned)) {
 							continue
 						}
-						contentDelta := map[string]any{
-							"content": cleaned,
-						}
-						if !s.firstChunkSent {
-							contentDelta["role"] = "assistant"
-							s.firstChunkSent = true
-						}
-						newChoices = append(newChoices, openaifmt.BuildChatStreamDeltaChoice(0, contentDelta))
+						batch.append("content", cleaned)
 					}
 				}
 			}
 		}
-		if len(delta) > 0 {
-			newChoices = append(newChoices, openaifmt.BuildChatStreamDeltaChoice(0, delta))
-		}
-	}
-
-	if len(newChoices) > 0 {
-		s.sendChunk(openaifmt.BuildChatStreamChunk(s.completionID, s.created, s.model, newChoices, nil))
 	}
+	batch.flush()
 	return streamengine.ParsedDecision{ContentSeen: contentSeen}
 }

internal/httpapi/openai/chat/empty_retry_runtime.go

@@ -16,6 +16,8 @@ import (
 )
 
 type chatNonStreamResult struct {
+	rawThinking           string
+	rawText               string
 	thinking              string
 	toolDetectionThinking string
 	text                  string
@@ -26,11 +28,12 @@ type chatNonStreamResult struct {
 	responseMessageID     int
 }
 
-func (h *Handler) handleNonStreamWithRetry(w http.ResponseWriter, ctx context.Context, a *auth.RequestAuth, resp *http.Response, payload map[string]any, pow, completionID, model, finalPrompt string, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, historySession *chatHistorySession) {
+func (h *Handler) handleNonStreamWithRetry(w http.ResponseWriter, ctx context.Context, a *auth.RequestAuth, resp *http.Response, payload map[string]any, pow, completionID, model, finalPrompt string, refFileTokens int, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, historySession *chatHistorySession) {
 	attempts := 0
 	currentResp := resp
 	usagePrompt := finalPrompt
 	accumulatedThinking := ""
+	accumulatedRawThinking := ""
 	accumulatedToolDetectionThinking := ""
 	for {
 		result, ok := h.collectChatNonStreamAttempt(w, currentResp, completionID, model, usagePrompt, thinkingEnabled, searchEnabled, toolNames, toolsRaw)
@@ -38,15 +41,18 @@ func (h *Handler) handleNonStreamWithRetry(w http.ResponseWriter, ctx context.Co
 			return
 		}
 		accumulatedThinking += sse.TrimContinuationOverlap(accumulatedThinking, result.thinking)
+		accumulatedRawThinking += sse.TrimContinuationOverlap(accumulatedRawThinking, result.rawThinking)
 		accumulatedToolDetectionThinking += sse.TrimContinuationOverlap(accumulatedToolDetectionThinking, result.toolDetectionThinking)
 		result.thinking = accumulatedThinking
+		result.rawThinking = accumulatedRawThinking
 		result.toolDetectionThinking = accumulatedToolDetectionThinking
-		detected := detectAssistantToolCalls(result.text, result.thinking, result.toolDetectionThinking, toolNames)
+		detected := detectAssistantToolCalls(result.rawText, result.text, result.rawThinking, result.toolDetectionThinking, toolNames)
 		result.detectedCalls = len(detected.Calls)
 		result.body = openaifmt.BuildChatCompletionWithToolCalls(completionID, model, usagePrompt, result.thinking, result.text, detected.Calls, toolsRaw)
+		addRefFileTokensToUsage(result.body, refFileTokens)
 		result.finishReason = chatFinishReason(result.body)
 		if !shouldRetryChatNonStream(result, attempts) {
-			h.finishChatNonStreamResult(w, result, attempts, usagePrompt, historySession)
+			h.finishChatNonStreamResult(w, result, attempts, usagePrompt, refFileTokens, historySession)
 			return
 		}
 
@@ -67,7 +73,7 @@ func (h *Handler) handleNonStreamWithRetry(w http.ResponseWriter, ctx context.Co
 			config.Logger.Warn("[openai_empty_retry] retry request failed", "surface", "chat.completions", "stream", false, "retry_attempt", attempts, "error", err)
 			return
 		}
-		usagePrompt = usagePromptWithEmptyOutputRetry(finalPrompt, attempts)
+		usagePrompt = usagePromptWithEmptyOutputRetry(usagePrompt, attempts)
 		currentResp = nextResp
 	}
 }
@@ -82,16 +88,17 @@ func (h *Handler) collectChatNonStreamAttempt(w http.ResponseWriter, resp *http.
 	result := sse.CollectStream(resp, thinkingEnabled, true)
 	stripReferenceMarkers := h.compatStripReferenceMarkers()
 	finalThinking := cleanVisibleOutput(result.Thinking, stripReferenceMarkers)
-	finalToolDetectionThinking := cleanVisibleOutput(result.ToolDetectionThinking, stripReferenceMarkers)
 	finalText := cleanVisibleOutput(result.Text, stripReferenceMarkers)
 	if searchEnabled {
 		finalText = replaceCitationMarkersWithLinks(finalText, result.CitationLinks)
 	}
-	detected := detectAssistantToolCalls(finalText, finalThinking, finalToolDetectionThinking, toolNames)
+	detected := detectAssistantToolCalls(result.Text, finalText, result.Thinking, result.ToolDetectionThinking, toolNames)
 	respBody := openaifmt.BuildChatCompletionWithToolCalls(completionID, model, usagePrompt, finalThinking, finalText, detected.Calls, toolsRaw)
 	return chatNonStreamResult{
+		rawThinking:           result.Thinking,
+		rawText:               result.Text,
 		thinking:              finalThinking,
-		toolDetectionThinking: finalToolDetectionThinking,
+		toolDetectionThinking: result.ToolDetectionThinking,
 		text:                  finalText,
 		contentFilter:         result.ContentFilter,
 		detectedCalls:         len(detected.Calls),
@@ -101,7 +108,7 @@ func (h *Handler) collectChatNonStreamAttempt(w http.ResponseWriter, resp *http.
 	}, true
 }
 
-func (h *Handler) finishChatNonStreamResult(w http.ResponseWriter, result chatNonStreamResult, attempts int, usagePrompt string, historySession *chatHistorySession) {
+func (h *Handler) finishChatNonStreamResult(w http.ResponseWriter, result chatNonStreamResult, attempts int, usagePrompt string, refFileTokens int, historySession *chatHistorySession) {
 	if result.detectedCalls == 0 && shouldWriteUpstreamEmptyOutputError(result.text) {
 		status, message, code := upstreamEmptyOutputDetail(result.contentFilter, result.text, result.thinking)
 		if historySession != nil {
@@ -112,7 +119,7 @@ func (h *Handler) finishChatNonStreamResult(w http.ResponseWriter, result chatNo
 		return
 	}
 	if historySession != nil {
-		historySession.success(http.StatusOK, result.thinking, result.text, result.finishReason, openaifmt.BuildChatUsage(usagePrompt, result.thinking, result.text))
+		historySession.success(http.StatusOK, result.thinking, result.text, result.finishReason, openaifmt.BuildChatUsageForModel("", usagePrompt, result.thinking, result.text, refFileTokens))
 	}
 	writeJSON(w, http.StatusOK, result.body)
 	source := "first_attempt"
@@ -139,8 +146,8 @@ func shouldRetryChatNonStream(result chatNonStreamResult, attempts int) bool {
 		strings.TrimSpace(result.text) == ""
 }
 
-func (h *Handler) handleStreamWithRetry(w http.ResponseWriter, r *http.Request, a *auth.RequestAuth, resp *http.Response, payload map[string]any, pow, completionID, model, finalPrompt string, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, historySession *chatHistorySession) {
-	streamRuntime, initialType, ok := h.prepareChatStreamRuntime(w, resp, completionID, model, finalPrompt, thinkingEnabled, searchEnabled, toolNames, toolsRaw, historySession)
+func (h *Handler) handleStreamWithRetry(w http.ResponseWriter, r *http.Request, a *auth.RequestAuth, resp *http.Response, payload map[string]any, pow, completionID, model, finalPrompt string, refFileTokens int, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, historySession *chatHistorySession) {
+	streamRuntime, initialType, ok := h.prepareChatStreamRuntime(w, resp, completionID, model, finalPrompt, refFileTokens, thinkingEnabled, searchEnabled, toolNames, toolsRaw, historySession)
 	if !ok {
 		return
 	}
@@ -182,7 +189,7 @@ func (h *Handler) handleStreamWithRetry(w http.ResponseWriter, r *http.Request,
 	}
 }
 
-func (h *Handler) prepareChatStreamRuntime(w http.ResponseWriter, resp *http.Response, completionID, model, finalPrompt string, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, historySession *chatHistorySession) (*chatStreamRuntime, string, bool) {
+func (h *Handler) prepareChatStreamRuntime(w http.ResponseWriter, resp *http.Response, completionID, model, finalPrompt string, refFileTokens int, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, historySession *chatHistorySession) (*chatStreamRuntime, string, bool) {
 	if resp.StatusCode != http.StatusOK {
 		defer func() { _ = resp.Body.Close() }()
 		body, _ := io.ReadAll(resp.Body)
@@ -210,6 +217,7 @@ func (h *Handler) prepareChatStreamRuntime(w http.ResponseWriter, resp *http.Res
 		thinkingEnabled, searchEnabled, h.compatStripReferenceMarkers(), toolNames, toolsRaw,
 		len(toolNames) > 0, h.toolcallFeatureMatchEnabled() && h.toolcallEarlyEmitHighConfidence(),
 	)
+	streamRuntime.refFileTokens = refFileTokens
 	return streamRuntime, initialType, true
 }
 
@@ -239,11 +247,15 @@ func (h *Handler) consumeChatStreamAttempt(r *http.Request, resp *http.Response,
 			}
 		},
 		OnContextDone: func() {
+			streamRuntime.markContextCancelled()
 			if historySession != nil {
 				historySession.stopped(streamRuntime.thinking.String(), streamRuntime.text.String(), string(streamengine.StopReasonContextCancelled))
 			}
 		},
 	})
+	if streamRuntime.finalErrorCode == string(streamengine.StopReasonContextCancelled) {
+		return true, false
+	}
 	terminalWritten := streamRuntime.finalize(finalReason, allowDeferEmpty && finalReason != "content_filter")
 	if terminalWritten {
 		recordChatStreamHistory(streamRuntime, historySession)
@@ -275,6 +287,10 @@ func logChatStreamTerminal(streamRuntime *chatStreamRuntime, attempts int) {
 	if attempts > 0 {
 		source = "synthetic_retry"
 	}
+	if streamRuntime.finalErrorCode == string(streamengine.StopReasonContextCancelled) {
+		config.Logger.Info("[openai_empty_retry] terminal cancelled", "surface", "chat.completions", "stream", true, "retry_attempts", attempts, "error_code", streamRuntime.finalErrorCode)
+		return
+	}
 	if streamRuntime.finalErrorMessage != "" {
 		config.Logger.Info("[openai_empty_retry] terminal empty output", "surface", "chat.completions", "stream", true, "retry_attempts", attempts, "success_source", "none", "error_code", streamRuntime.finalErrorCode)
 		return

internal/httpapi/openai/chat/empty_retry_runtime_test.go

@@ -0,0 +1,85 @@
+package chat
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	"ds2api/internal/chathistory"
+	"ds2api/internal/stream"
+)
+
+func TestConsumeChatStreamAttemptMarksContextCancelledState(t *testing.T) {
+	historyStore := newTestChatHistoryStore(t)
+	entry, err := historyStore.Start(chathistory.StartParams{
+		CallerID:  "caller:test",
+		Model:     "deepseek-v4-flash",
+		Stream:    true,
+		UserInput: "hello",
+	})
+	if err != nil {
+		t.Fatalf("start history failed: %v", err)
+	}
+	session := &chatHistorySession{
+		store:       historyStore,
+		entryID:     entry.ID,
+		startedAt:   time.Now(),
+		lastPersist: time.Now(),
+		finalPrompt: "prompt",
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+
+	req := httptest.NewRequest(http.MethodPost, "/v1/chat/completions", nil).WithContext(ctx)
+	rec := httptest.NewRecorder()
+	streamRuntime := newChatStreamRuntime(
+		rec,
+		http.NewResponseController(rec),
+		true,
+		"cid-cancelled",
+		time.Now().Unix(),
+		"deepseek-v4-flash",
+		"prompt",
+		false,
+		false,
+		true,
+		nil,
+		nil,
+		false,
+		false,
+	)
+	resp := makeOpenAISSEHTTPResponse(
+		`data: {"p":"response/content","v":"hello"}`,
+		`data: [DONE]`,
+	)
+
+	h := &Handler{}
+	terminalWritten, retryable := h.consumeChatStreamAttempt(req, resp, streamRuntime, "text", false, session, true)
+	if !terminalWritten || retryable {
+		t.Fatalf("expected cancelled attempt to terminate without retry, got terminalWritten=%v retryable=%v", terminalWritten, retryable)
+	}
+	if got, want := streamRuntime.finalErrorCode, string(stream.StopReasonContextCancelled); got != want {
+		t.Fatalf("expected cancelled final error code %q, got %q", want, got)
+	}
+	if streamRuntime.finalErrorMessage == "" {
+		t.Fatalf("expected cancelled final error message to be preserved")
+	}
+
+	snapshot, err := historyStore.Snapshot()
+	if err != nil {
+		t.Fatalf("snapshot failed: %v", err)
+	}
+	if len(snapshot.Items) != 1 {
+		t.Fatalf("expected one history item, got %d", len(snapshot.Items))
+	}
+	full, err := historyStore.Get(snapshot.Items[0].ID)
+	if err != nil {
+		t.Fatalf("get detail failed: %v", err)
+	}
+	if full.Status != "stopped" {
+		t.Fatalf("expected stopped status, got %#v", full)
+	}
+}

internal/httpapi/openai/chat/handler.go

@@ -148,6 +148,6 @@ func formatFinalStreamToolCallsWithStableIDs(calls []toolcall.ParsedToolCall, id
 	return shared.FormatFinalStreamToolCallsWithStableIDs(calls, ids, toolsRaw)
 }
 
-func detectAssistantToolCalls(text, exposedThinking, detectionThinking string, toolNames []string) toolcall.ToolCallParseResult {
-	return shared.DetectAssistantToolCalls(text, exposedThinking, detectionThinking, toolNames)
+func detectAssistantToolCalls(rawText, visibleText, exposedThinking, detectionThinking string, toolNames []string) toolcall.ToolCallParseResult {
+	return shared.DetectAssistantToolCalls(rawText, visibleText, exposedThinking, detectionThinking, toolNames)
 }

internal/httpapi/openai/chat/handler_chat.go

@@ -108,11 +108,12 @@ func (h *Handler) ChatCompletions(w http.ResponseWriter, r *http.Request) {
 		writeOpenAIError(w, http.StatusInternalServerError, "Failed to get completion.")
 		return
 	}
+	refFileTokens := stdReq.RefFileTokens
 	if stdReq.Stream {
-		h.handleStreamWithRetry(w, r, a, resp, payload, pow, sessionID, stdReq.ResponseModel, stdReq.FinalPrompt, stdReq.Thinking, stdReq.Search, stdReq.ToolNames, stdReq.ToolsRaw, historySession)
+		h.handleStreamWithRetry(w, r, a, resp, payload, pow, sessionID, stdReq.ResponseModel, stdReq.PromptTokenText, refFileTokens, stdReq.Thinking, stdReq.Search, stdReq.ToolNames, stdReq.ToolsRaw, historySession)
 		return
 	}
-	h.handleNonStreamWithRetry(w, r.Context(), a, resp, payload, pow, sessionID, stdReq.ResponseModel, stdReq.FinalPrompt, stdReq.Thinking, stdReq.Search, stdReq.ToolNames, stdReq.ToolsRaw, historySession)
+	h.handleNonStreamWithRetry(w, r.Context(), a, resp, payload, pow, sessionID, stdReq.ResponseModel, stdReq.PromptTokenText, refFileTokens, stdReq.Thinking, stdReq.Search, stdReq.ToolNames, stdReq.ToolsRaw, historySession)
 }
 
 func (h *Handler) autoDeleteRemoteSession(ctx context.Context, a *auth.RequestAuth, sessionID string) {
@@ -148,7 +149,7 @@ func (h *Handler) autoDeleteRemoteSession(ctx context.Context, a *auth.RequestAu
 	}
 }
 
-func (h *Handler) handleNonStream(w http.ResponseWriter, resp *http.Response, completionID, model, finalPrompt string, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, historySession *chatHistorySession) {
+func (h *Handler) handleNonStream(w http.ResponseWriter, resp *http.Response, completionID, model, finalPrompt string, refFileTokens int, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, historySession *chatHistorySession) {
 	if resp.StatusCode != http.StatusOK {
 		defer func() { _ = resp.Body.Close() }()
 		body, _ := io.ReadAll(resp.Body)
@@ -162,12 +163,11 @@ func (h *Handler) handleNonStream(w http.ResponseWriter, resp *http.Response, co
 
 	stripReferenceMarkers := h.compatStripReferenceMarkers()
 	finalThinking := cleanVisibleOutput(result.Thinking, stripReferenceMarkers)
-	finalToolDetectionThinking := cleanVisibleOutput(result.ToolDetectionThinking, stripReferenceMarkers)
 	finalText := cleanVisibleOutput(result.Text, stripReferenceMarkers)
 	if searchEnabled {
 		finalText = replaceCitationMarkersWithLinks(finalText, result.CitationLinks)
 	}
-	detected := detectAssistantToolCalls(finalText, finalThinking, finalToolDetectionThinking, toolNames)
+	detected := detectAssistantToolCalls(result.Text, finalText, result.Thinking, result.ToolDetectionThinking, toolNames)
 	if shouldWriteUpstreamEmptyOutputError(finalText) && len(detected.Calls) == 0 {
 		status, message, code := upstreamEmptyOutputDetail(result.ContentFilter, finalText, finalThinking)
 		if historySession != nil {
@@ -177,6 +177,9 @@ func (h *Handler) handleNonStream(w http.ResponseWriter, resp *http.Response, co
 		return
 	}
 	respBody := openaifmt.BuildChatCompletionWithToolCalls(completionID, model, finalPrompt, finalThinking, finalText, detected.Calls, toolsRaw)
+	if refFileTokens > 0 {
+		addRefFileTokensToUsage(respBody, refFileTokens)
+	}
 	finishReason := "stop"
 	if choices, ok := respBody["choices"].([]map[string]any); ok && len(choices) > 0 {
 		if fr, _ := choices[0]["finish_reason"].(string); strings.TrimSpace(fr) != "" {
@@ -184,12 +187,12 @@ func (h *Handler) handleNonStream(w http.ResponseWriter, resp *http.Response, co
 		}
 	}
 	if historySession != nil {
-		historySession.success(http.StatusOK, finalThinking, finalText, finishReason, openaifmt.BuildChatUsage(finalPrompt, finalThinking, finalText))
+		historySession.success(http.StatusOK, finalThinking, finalText, finishReason, openaifmt.BuildChatUsageForModel(model, finalPrompt, finalThinking, finalText, refFileTokens))
 	}
 	writeJSON(w, http.StatusOK, respBody)
 }
 
-func (h *Handler) handleStream(w http.ResponseWriter, r *http.Request, resp *http.Response, completionID, model, finalPrompt string, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, historySession *chatHistorySession) {
+func (h *Handler) handleStream(w http.ResponseWriter, r *http.Request, resp *http.Response, completionID, model, finalPrompt string, refFileTokens int, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, historySession *chatHistorySession) {
 	defer func() { _ = resp.Body.Close() }()
 	if resp.StatusCode != http.StatusOK {
 		body, _ := io.ReadAll(resp.Body)
@@ -234,6 +237,7 @@ func (h *Handler) handleStream(w http.ResponseWriter, r *http.Request, resp *htt
 		bufferToolContent,
 		emitEarlyToolDeltas,
 	)
+	streamRuntime.refFileTokens = refFileTokens
 
 	streamengine.ConsumeSSE(streamengine.ConsumeConfig{
 		Context:             r.Context(),

internal/httpapi/openai/chat/handler_toolcall_test.go

@@ -1,6 +1,7 @@
 package chat
 
 import (
+	"context"
 	"encoding/json"
 	"io"
 	"net/http"
@@ -93,7 +94,7 @@ func TestHandleNonStreamReturns429WhenUpstreamOutputEmpty(t *testing.T) {
 	)
 	rec := httptest.NewRecorder()
 
-	h.handleNonStream(rec, resp, "cid-empty", "deepseek-v4-flash", "prompt", false, false, nil, nil, nil)
+	h.handleNonStream(rec, resp, "cid-empty", "deepseek-v4-flash", "prompt", 0, false, false, nil, nil, nil)
 	if rec.Code != http.StatusTooManyRequests {
 		t.Fatalf("expected status 429 for empty upstream output, got %d body=%s", rec.Code, rec.Body.String())
 	}
@@ -112,7 +113,7 @@ func TestHandleNonStreamReturnsContentFilterErrorWhenUpstreamFilteredWithoutOutp
 	)
 	rec := httptest.NewRecorder()
 
-	h.handleNonStream(rec, resp, "cid-empty-filtered", "deepseek-v4-flash", "prompt", false, false, nil, nil, nil)
+	h.handleNonStream(rec, resp, "cid-empty-filtered", "deepseek-v4-flash", "prompt", 0, false, false, nil, nil, nil)
 	if rec.Code != http.StatusBadRequest {
 		t.Fatalf("expected status 400 for filtered upstream output, got %d body=%s", rec.Code, rec.Body.String())
 	}
@@ -131,7 +132,7 @@ func TestHandleNonStreamReturns429WhenUpstreamHasOnlyThinking(t *testing.T) {
 	)
 	rec := httptest.NewRecorder()
 
-	h.handleNonStream(rec, resp, "cid-thinking-only", "deepseek-v4-pro", "prompt", true, false, nil, nil, nil)
+	h.handleNonStream(rec, resp, "cid-thinking-only", "deepseek-v4-pro", "prompt", 0, true, false, nil, nil, nil)
 	if rec.Code != http.StatusTooManyRequests {
 		t.Fatalf("expected status 429 for thinking-only upstream output, got %d body=%s", rec.Code, rec.Body.String())
 	}
@@ -150,7 +151,7 @@ func TestHandleNonStreamPromotesThinkingToolCallsWhenTextEmpty(t *testing.T) {
 	)
 	rec := httptest.NewRecorder()
 
-	h.handleNonStream(rec, resp, "cid-thinking-tool", "deepseek-v4-pro", "prompt", true, false, []string{"search"}, nil, nil)
+	h.handleNonStream(rec, resp, "cid-thinking-tool", "deepseek-v4-pro", "prompt", 0, true, false, []string{"search"}, nil, nil)
 	if rec.Code != http.StatusOK {
 		t.Fatalf("expected 200 for thinking tool calls, got %d body=%s", rec.Code, rec.Body.String())
 	}
@@ -181,7 +182,7 @@ func TestHandleNonStreamPromotesHiddenThinkingDSMLToolCallsWhenTextEmpty(t *test
 	)
 	rec := httptest.NewRecorder()
 
-	h.handleNonStream(rec, resp, "cid-hidden-thinking-tool", "deepseek-v4-pro", "prompt", false, false, []string{"search"}, nil, nil)
+	h.handleNonStream(rec, resp, "cid-hidden-thinking-tool", "deepseek-v4-pro", "prompt", 0, false, false, []string{"search"}, nil, nil)
 	if rec.Code != http.StatusOK {
 		t.Fatalf("expected 200 for hidden thinking tool calls, got %d body=%s", rec.Code, rec.Body.String())
 	}
@@ -211,7 +212,7 @@ func TestHandleStreamToolsPlainTextStreamsBeforeFinish(t *testing.T) {
 	rec := httptest.NewRecorder()
 	req := httptest.NewRequest(http.MethodPost, "/v1/chat/completions", nil)
 
-	h.handleStream(rec, req, resp, "cid6", "deepseek-v4-flash", "prompt", false, false, []string{"search"}, nil, nil)
+	h.handleStream(rec, req, resp, "cid6", "deepseek-v4-flash", "prompt", 0, false, false, []string{"search"}, nil, nil)
 
 	frames, done := parseSSEDataFrames(t, rec.Body.String())
 	if !done {
@@ -239,6 +240,118 @@ func TestHandleStreamToolsPlainTextStreamsBeforeFinish(t *testing.T) {
 	}
 }
 
+func TestHandleStreamThinkingDisabledDoesNotLeakHiddenFragmentContinuations(t *testing.T) {
+	h := &Handler{}
+	resp := makeSSEHTTPResponse(
+		`data: {"p":"response/fragments","o":"APPEND","v":[{"type":"THINK","content":"我们"}]}`,
+		`data: {"p":"response/fragments/-1/content","v":"被"}`,
+		`data: {"v":"要求"}`,
+		`data: {"p":"response/fragments","o":"APPEND","v":[{"type":"RESPONSE","content":"答"}]}`,
+		`data: {"p":"response/fragments/-1/content","v":"案"}`,
+		`data: [DONE]`,
+	)
+	rec := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodPost, "/v1/chat/completions", nil)
+
+	h.handleStream(rec, req, resp, "cid-hidden-fragment", "deepseek-v4-flash", "prompt", 0, false, false, nil, nil, nil)
+
+	frames, done := parseSSEDataFrames(t, rec.Body.String())
+	if !done {
+		t.Fatalf("expected [DONE], body=%s", rec.Body.String())
+	}
+	content := strings.Builder{}
+	for _, frame := range frames {
+		choices, _ := frame["choices"].([]any)
+		for _, item := range choices {
+			choice, _ := item.(map[string]any)
+			delta, _ := choice["delta"].(map[string]any)
+			if c, ok := delta["content"].(string); ok {
+				content.WriteString(c)
+			}
+		}
+	}
+	if got := content.String(); got != "答案" {
+		t.Fatalf("expected only visible response text, got %q body=%s", got, rec.Body.String())
+	}
+}
+
+func TestHandleStreamEmitsSingleChoiceFramesForMultipleParsedParts(t *testing.T) {
+	h := &Handler{}
+	resp := makeSSEHTTPResponse(
+		`data: {"p":"response/fragments","o":"APPEND","v":[{"type":"THINK","content":"我们"},{"type":"THINK","content":"被"},{"type":"THINK","content":"要求"},{"type":"RESPONSE","content":"答"},{"type":"RESPONSE","content":"案"}]}`,
+		`data: [DONE]`,
+	)
+	rec := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodPost, "/v1/chat/completions", nil)
+
+	h.handleStream(rec, req, resp, "cid-multi-parts", "deepseek-v4-pro", "prompt", 0, true, false, nil, nil, nil)
+
+	frames, done := parseSSEDataFrames(t, rec.Body.String())
+	if !done {
+		t.Fatalf("expected [DONE], body=%s", rec.Body.String())
+	}
+	var reasoning, content strings.Builder
+	for _, frame := range frames {
+		choices, _ := frame["choices"].([]any)
+		if len(choices) != 1 {
+			t.Fatalf("expected exactly one choice per stream frame, got %d frame=%#v body=%s", len(choices), frame, rec.Body.String())
+		}
+		choice, _ := choices[0].(map[string]any)
+		delta, _ := choice["delta"].(map[string]any)
+		reasoning.WriteString(asString(delta["reasoning_content"]))
+		content.WriteString(asString(delta["content"]))
+	}
+	if got := reasoning.String(); got != "我们被要求" {
+		t.Fatalf("first-choice-only client would miss reasoning tokens: got %q body=%s", got, rec.Body.String())
+	}
+	if got := content.String(); got != "答案" {
+		t.Fatalf("first-choice-only client would miss content tokens: got %q body=%s", got, rec.Body.String())
+	}
+}
+
+func TestHandleStreamCoalescesSmallContentDeltas(t *testing.T) {
+	h := &Handler{}
+	lines := make([]string, 0, 101)
+	for i := 0; i < 100; i++ {
+		b, _ := json.Marshal(map[string]any{
+			"p": "response/content",
+			"v": "字",
+		})
+		lines = append(lines, "data: "+string(b))
+	}
+	lines = append(lines, "data: [DONE]")
+	resp := makeSSEHTTPResponse(lines...)
+	rec := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodPost, "/v1/chat/completions", nil)
+
+	h.handleStream(rec, req, resp, "cid-coalesce", "deepseek-v4-flash", "prompt", 0, false, false, nil, nil, nil)
+
+	frames, done := parseSSEDataFrames(t, rec.Body.String())
+	if !done {
+		t.Fatalf("expected [DONE], body=%s", rec.Body.String())
+	}
+	var content strings.Builder
+	contentDeltaFrames := 0
+	for _, frame := range frames {
+		choices, _ := frame["choices"].([]any)
+		if len(choices) != 1 {
+			t.Fatalf("expected exactly one choice per stream frame, got %d frame=%#v body=%s", len(choices), frame, rec.Body.String())
+		}
+		choice, _ := choices[0].(map[string]any)
+		delta, _ := choice["delta"].(map[string]any)
+		if c, ok := delta["content"].(string); ok {
+			contentDeltaFrames++
+			content.WriteString(c)
+		}
+	}
+	if got, want := content.String(), strings.Repeat("字", 100); got != want {
+		t.Fatalf("coalesced stream content mismatch: got %q want %q body=%s", got, want, rec.Body.String())
+	}
+	if contentDeltaFrames >= 100 {
+		t.Fatalf("expected coalescing to reduce 100 tiny content frames, got %d body=%s", contentDeltaFrames, rec.Body.String())
+	}
+}
+
 func TestHandleStreamIncompleteCapturedToolJSONFlushesAsTextOnFinalize(t *testing.T) {
 	h := &Handler{}
 	resp := makeSSEHTTPResponse(
@@ -248,7 +361,7 @@ func TestHandleStreamIncompleteCapturedToolJSONFlushesAsTextOnFinalize(t *testin
 	rec := httptest.NewRecorder()
 	req := httptest.NewRequest(http.MethodPost, "/v1/chat/completions", nil)
 
-	h.handleStream(rec, req, resp, "cid10", "deepseek-v4-flash", "prompt", false, false, []string{"search"}, nil, nil)
+	h.handleStream(rec, req, resp, "cid10", "deepseek-v4-flash", "prompt", 0, false, false, []string{"search"}, nil, nil)
 
 	frames, done := parseSSEDataFrames(t, rec.Body.String())
 	if !done {
@@ -282,7 +395,7 @@ func TestHandleStreamPromotesThinkingToolCallsOnFinalizeWithoutMidstreamIntercep
 	rec := httptest.NewRecorder()
 	req := httptest.NewRequest(http.MethodPost, "/v1/chat/completions", nil)
 
-	h.handleStream(rec, req, resp, "cid-thinking-stream", "deepseek-v4-pro", "prompt", true, false, []string{"search"}, nil, nil)
+	h.handleStream(rec, req, resp, "cid-thinking-stream", "deepseek-v4-pro", "prompt", 0, true, false, []string{"search"}, nil, nil)
 
 	frames, done := parseSSEDataFrames(t, rec.Body.String())
 	if !done {
@@ -291,20 +404,16 @@ func TestHandleStreamPromotesThinkingToolCallsOnFinalizeWithoutMidstreamIntercep
 	if !streamHasToolCallsDelta(frames) {
 		t.Fatalf("expected tool_calls delta from finalize fallback, body=%s", rec.Body.String())
 	}
-	reasoningSeen := false
 	for _, frame := range frames {
 		choices, _ := frame["choices"].([]any)
 		for _, item := range choices {
 			choice, _ := item.(map[string]any)
 			delta, _ := choice["delta"].(map[string]any)
 			if asString(delta["reasoning_content"]) != "" {
-				reasoningSeen = true
+				t.Fatalf("did not expect leaked reasoning_content markup, body=%s", rec.Body.String())
 			}
 		}
 	}
-	if !reasoningSeen {
-		t.Fatalf("expected reasoning_content to stream before finalize fallback, body=%s", rec.Body.String())
-	}
 	if streamFinishReason(frames) != "tool_calls" {
 		t.Fatalf("expected finish_reason=tool_calls, body=%s", rec.Body.String())
 	}
@@ -319,7 +428,7 @@ func TestHandleStreamPromotesHiddenThinkingDSMLToolCallsOnFinalize(t *testing.T)
 	rec := httptest.NewRecorder()
 	req := httptest.NewRequest(http.MethodPost, "/v1/chat/completions", nil)
 
-	h.handleStream(rec, req, resp, "cid-hidden-thinking-stream", "deepseek-v4-pro", "prompt", false, false, []string{"search"}, nil, nil)
+	h.handleStream(rec, req, resp, "cid-hidden-thinking-stream", "deepseek-v4-pro", "prompt", 0, false, false, []string{"search"}, nil, nil)
 
 	frames, done := parseSSEDataFrames(t, rec.Body.String())
 	if !done {
@@ -353,7 +462,7 @@ func TestHandleStreamEmitsDistinctToolCallIDsAcrossSeparateToolBlocks(t *testing
 	rec := httptest.NewRecorder()
 	req := httptest.NewRequest(http.MethodPost, "/v1/chat/completions", nil)
 
-	h.handleStream(rec, req, resp, "cid-multi", "deepseek-v4-flash", "prompt", false, false, []string{"read_file", "search"}, nil, nil)
+	h.handleStream(rec, req, resp, "cid-multi", "deepseek-v4-flash", "prompt", 0, false, false, []string{"read_file", "search"}, nil, nil)
 
 	frames, done := parseSSEDataFrames(t, rec.Body.String())
 	if !done {
@@ -419,7 +528,7 @@ func TestHandleStreamCoercesSchemaDeclaredStringArgumentsOnFinalize(t *testing.T
 		},
 	}
 
-	h.handleStream(rec, req, resp, "cid-string-protect", "deepseek-v4-flash", "prompt", false, false, []string{"Write"}, toolsRaw, nil)
+	h.handleStream(rec, req, resp, "cid-string-protect", "deepseek-v4-flash", "prompt", 0, false, false, []string{"Write"}, toolsRaw, nil)
 
 	frames, done := parseSSEDataFrames(t, rec.Body.String())
 	if !done {
@@ -451,3 +560,45 @@ func TestHandleStreamCoercesSchemaDeclaredStringArgumentsOnFinalize(t *testing.T
 	}
 	t.Fatalf("expected at least one streamed tool call delta, body=%s", rec.Body.String())
 }
+
+func TestHandleNonStreamWithRetryIncludesRefFileTokensInUsage(t *testing.T) {
+	h := &Handler{}
+
+	run := func(refFileTokens int) map[string]any {
+		resp := makeSSEHTTPResponse(
+			`data: {"p":"response/content","v":"hello world"}`,
+			`data: [DONE]`,
+		)
+		rec := httptest.NewRecorder()
+		h.handleNonStreamWithRetry(rec, context.Background(), nil, resp, nil, "", "cid-ref", "deepseek-v4-flash", "prompt", refFileTokens, false, false, nil, nil, nil)
+		if rec.Code != http.StatusOK {
+			t.Fatalf("expected 200, got %d body=%s", rec.Code, rec.Body.String())
+		}
+		return decodeJSONBody(t, rec.Body.String())
+	}
+
+	base := run(0)
+	withRef := run(7)
+
+	baseUsage, _ := base["usage"].(map[string]any)
+	refUsage, _ := withRef["usage"].(map[string]any)
+	if baseUsage == nil || refUsage == nil {
+		t.Fatalf("expected usage objects, base=%#v ref=%#v", base["usage"], withRef["usage"])
+	}
+
+	getInt := func(m map[string]any, key string) int {
+		t.Helper()
+		v, ok := m[key].(float64)
+		if !ok {
+			t.Fatalf("expected numeric %s, got %#v", key, m[key])
+		}
+		return int(v)
+	}
+
+	if got := getInt(refUsage, "prompt_tokens") - getInt(baseUsage, "prompt_tokens"); got != 7 {
+		t.Fatalf("expected prompt_tokens delta 7, got %d", got)
+	}
+	if got := getInt(refUsage, "total_tokens") - getInt(baseUsage, "total_tokens"); got != 7 {
+		t.Fatalf("expected total_tokens delta 7, got %d", got)
+	}
+}

internal/httpapi/openai/chat/ref_file_tokens.go

@@ -0,0 +1,26 @@
+package chat
+
+// addRefFileTokensToUsage adds inline-uploaded file token estimates to an existing
+// usage map inside a response object. This keeps the token accounting aware of file
+// content that the upstream model processes but that is not part of the prompt text.
+func addRefFileTokensToUsage(obj map[string]any, refFileTokens int) {
+	if refFileTokens <= 0 || obj == nil {
+		return
+	}
+	usage, ok := obj["usage"].(map[string]any)
+	if !ok || usage == nil {
+		return
+	}
+	for _, key := range []string{"input_tokens", "prompt_tokens"} {
+		if v, ok := usage[key]; ok {
+			if n, ok := v.(int); ok {
+				usage[key] = n + refFileTokens
+			}
+		}
+	}
+	if v, ok := usage["total_tokens"]; ok {
+		if n, ok := v.(int); ok {
+			usage["total_tokens"] = n + refFileTokens
+		}
+	}
+}

internal/httpapi/openai/chat/vercel_prepare_test.go

@@ -130,8 +130,8 @@ func TestHandleVercelStreamPrepareAppliesCurrentInputFile(t *testing.T) {
 		t.Fatalf("expected payload object, got %#v", body["payload"])
 	}
 	promptText, _ := payload["prompt"].(string)
-	if !strings.Contains(promptText, "Answer the latest user request directly.") {
-		t.Fatalf("expected neutral prompt, got %s", promptText)
+	if !strings.Contains(promptText, "Continue from the latest state in the attached DS2API_HISTORY.txt context.") {
+		t.Fatalf("expected continuation prompt, got %s", promptText)
 	}
 	if strings.Contains(promptText, "first user turn") || strings.Contains(promptText, "latest user turn") {
 		t.Fatalf("expected original turns hidden from prompt, got %s", promptText)

internal/httpapi/openai/citation_links_test.go

@@ -54,3 +54,31 @@ func TestReplaceCitationMarkersWithLinksSupportsReferenceZeroBased(t *testing.T)
 		t.Fatalf("expected %q, got %q", want, got)
 	}
 }
+
+func TestReplaceCitationMarkersWithLinksKeepsCitationOneBasedWithZeroBasedReference(t *testing.T) {
+	raw := "引用[citation:1]，来源[reference:0]，后续[reference:1]。"
+	links := map[int]string{
+		1: "https://example.com/first",
+		2: "https://example.com/second",
+	}
+
+	got := replaceCitationMarkersWithLinks(raw, links)
+	want := "引用[1](https://example.com/first)，来源[0](https://example.com/first)，后续[1](https://example.com/second)。"
+	if got != want {
+		t.Fatalf("expected %q, got %q", want, got)
+	}
+}
+
+func TestReplaceCitationMarkersWithLinksDetectsSpacedReferenceZeroBased(t *testing.T) {
+	raw := "来源[reference: 0] 与 [reference: 1]。"
+	links := map[int]string{
+		1: "https://example.com/first",
+		2: "https://example.com/second",
+	}
+
+	got := replaceCitationMarkersWithLinks(raw, links)
+	want := "来源[0](https://example.com/first) 与 [1](https://example.com/second)。"
+	if got != want {
+		t.Fatalf("expected %q, got %q", want, got)
+	}
+}

internal/httpapi/openai/file_inline_upload_test.go

@@ -94,6 +94,9 @@ func TestPreprocessInlineFileInputsReplacesDataURLAndCollectsRefFileIDs(t *testi
 	if len(ds.uploadCalls) != 1 {
 		t.Fatalf("expected 1 upload, got %d", len(ds.uploadCalls))
 	}
+	if ds.uploadCalls[0].ModelType != "default" {
+		t.Fatalf("expected default model type when request omits model, got %q", ds.uploadCalls[0].ModelType)
+	}
 	if ds.lastCtx != ctx {
 		t.Fatalf("expected upload to use request context")
 	}
@@ -149,7 +152,7 @@ func TestPreprocessInlineFileInputsDeduplicatesIdenticalPayloads(t *testing.T) {
 func TestChatCompletionsUploadsInlineFilesBeforeCompletion(t *testing.T) {
 	ds := &inlineUploadDSStub{}
 	h := &openAITestSurface{Store: mockOpenAIConfig{wideInput: true}, Auth: streamStatusAuthStub{}, DS: ds}
-	reqBody := `{"model":"deepseek-v4-flash","messages":[{"role":"user","content":[{"type":"input_text","text":"hi"},{"type":"image_url","image_url":{"url":"data:image/png;base64,QUJDRA=="}}]}],"stream":false}`
+	reqBody := `{"model":"deepseek-v4-vision","messages":[{"role":"user","content":[{"type":"input_text","text":"hi"},{"type":"image_url","image_url":{"url":"data:image/png;base64,QUJDRA=="}}]}],"stream":false}`
 	req := httptest.NewRequest(http.MethodPost, "/v1/chat/completions", strings.NewReader(reqBody))
 	req.Header.Set("Authorization", "Bearer direct-token")
 	req.Header.Set("Content-Type", "application/json")
@@ -163,6 +166,9 @@ func TestChatCompletionsUploadsInlineFilesBeforeCompletion(t *testing.T) {
 	if len(ds.uploadCalls) != 1 {
 		t.Fatalf("expected 1 upload call, got %d", len(ds.uploadCalls))
 	}
+	if ds.uploadCalls[0].ModelType != "vision" {
+		t.Fatalf("expected vision model type for vision request, got %q", ds.uploadCalls[0].ModelType)
+	}
 	if ds.completionReq == nil {
 		t.Fatal("expected completion payload to be captured")
 	}
@@ -177,7 +183,7 @@ func TestResponsesUploadsInlineFilesBeforeCompletion(t *testing.T) {
 	h := &openAITestSurface{Store: mockOpenAIConfig{wideInput: true}, Auth: streamStatusAuthStub{}, DS: ds}
 	r := chi.NewRouter()
 	registerOpenAITestRoutes(r, h)
-	reqBody := `{"model":"deepseek-v4-flash","input":[{"role":"user","content":[{"type":"input_text","text":"hi"},{"type":"input_image","image_url":{"url":"data:image/png;base64,QUJDRA=="}}]}],"stream":false}`
+	reqBody := `{"model":"deepseek-v4-pro","input":[{"role":"user","content":[{"type":"input_text","text":"hi"},{"type":"input_image","image_url":{"url":"data:image/png;base64,QUJDRA=="}}]}],"stream":false}`
 	req := httptest.NewRequest(http.MethodPost, "/v1/responses", strings.NewReader(reqBody))
 	req.Header.Set("Authorization", "Bearer direct-token")
 	req.Header.Set("Content-Type", "application/json")
@@ -191,6 +197,9 @@ func TestResponsesUploadsInlineFilesBeforeCompletion(t *testing.T) {
 	if len(ds.uploadCalls) != 1 {
 		t.Fatalf("expected 1 upload call, got %d", len(ds.uploadCalls))
 	}
+	if ds.uploadCalls[0].ModelType != "expert" {
+		t.Fatalf("expected expert model type for pro request, got %q", ds.uploadCalls[0].ModelType)
+	}
 	refIDs, _ := ds.completionReq["ref_file_ids"].([]any)
 	if len(refIDs) != 1 || refIDs[0] != "file-inline-1" {
 		t.Fatalf("unexpected completion ref_file_ids: %#v", ds.completionReq["ref_file_ids"])
@@ -216,6 +225,45 @@ func TestChatCompletionsInlineUploadFailureReturnsBadRequest(t *testing.T) {
 	}
 }
 
+func TestChatCompletionsInlineUploadLimitReturnsBadRequest(t *testing.T) {
+	ds := &inlineUploadDSStub{}
+	h := &openAITestSurface{Store: mockOpenAIConfig{wideInput: true}, Auth: streamStatusAuthStub{}, DS: ds}
+	content := []any{map[string]any{"type": "input_text", "text": "hi"}}
+	for i := 0; i < 51; i++ {
+		content = append(content, map[string]any{
+			"type":      "image_url",
+			"image_url": map[string]any{"url": "data:image/png;base64,QUJDRA=="},
+		})
+	}
+	body, err := json.Marshal(map[string]any{
+		"model": "deepseek-v4-flash",
+		"messages": []any{map[string]any{
+			"role":    "user",
+			"content": content,
+		}},
+		"stream": false,
+	})
+	if err != nil {
+		t.Fatalf("marshal request: %v", err)
+	}
+	req := httptest.NewRequest(http.MethodPost, "/v1/chat/completions", strings.NewReader(string(body)))
+	req.Header.Set("Authorization", "Bearer direct-token")
+	req.Header.Set("Content-Type", "application/json")
+	rec := httptest.NewRecorder()
+
+	h.ChatCompletions(rec, req)
+
+	if rec.Code != http.StatusBadRequest {
+		t.Fatalf("expected 400, got %d body=%s", rec.Code, rec.Body.String())
+	}
+	if !strings.Contains(rec.Body.String(), "exceeded maximum of 50 inline files per request") {
+		t.Fatalf("expected inline file limit error, got body=%s", rec.Body.String())
+	}
+	if ds.completionReq != nil {
+		t.Fatalf("did not expect completion call after inline file limit error")
+	}
+}
+
 func TestResponsesInlineUploadFailureReturnsInternalServerError(t *testing.T) {
 	ds := &inlineUploadDSStub{uploadErr: errors.New("boom")}
 	h := &openAITestSurface{Store: mockOpenAIConfig{wideInput: true}, Auth: streamStatusAuthStub{}, DS: ds}

internal/httpapi/openai/files/file_inline_upload.go

@@ -12,6 +12,7 @@ import (
 	"strings"
 
 	"ds2api/internal/auth"
+	"ds2api/internal/config"
 	dsclient "ds2api/internal/deepseek/client"
 	"ds2api/internal/httpapi/openai/shared"
 	"ds2api/internal/promptcompat"
@@ -39,11 +40,13 @@ func (e *inlineFileUploadError) Error() string {
 }
 
 type inlineUploadState struct {
-	ctx          context.Context
-	handler      *Handler
-	auth         *auth.RequestAuth
-	uploadedByID map[string]string
-	uploadCount  int
+	ctx             context.Context
+	handler         *Handler
+	auth            *auth.RequestAuth
+	modelType       string
+	uploadedByID    map[string]string
+	uploadCount     int
+	inlineFileBytes int
 }
 
 type inlineDecodedFile struct {
@@ -57,10 +60,19 @@ func (h *Handler) PreprocessInlineFileInputs(ctx context.Context, a *auth.Reques
 	if h == nil || h.DS == nil || len(req) == 0 {
 		return nil
 	}
+	modelType := "default"
+	if requestedModel, ok := req["model"].(string); ok {
+		if resolvedModel, ok := config.ResolveModel(h.Store, requestedModel); ok {
+			if resolvedType, ok := config.GetModelType(resolvedModel); ok {
+				modelType = resolvedType
+			}
+		}
+	}
 	state := &inlineUploadState{
 		ctx:          ctx,
 		handler:      h,
 		auth:         a,
+		modelType:    modelType,
 		uploadedByID: map[string]string{},
 	}
 	for _, key := range []string{"messages", "input", "attachments"} {
@@ -75,6 +87,9 @@ func (h *Handler) PreprocessInlineFileInputs(ctx context.Context, a *auth.Reques
 	if refIDs := promptcompat.CollectOpenAIRefFileIDs(req); len(refIDs) > 0 {
 		req["ref_file_ids"] = stringsToAnySlice(refIDs)
 	}
+	if state.inlineFileBytes > 0 {
+		req["_inline_file_bytes"] = state.inlineFileBytes
+	}
 	return nil
 }
 
@@ -135,13 +150,15 @@ func (s *inlineUploadState) tryUploadBlock(block map[string]any) (map[string]any
 		return nil, false, nil
 	}
 	if s.uploadCount >= maxInlineFilesPerRequest {
-		return nil, true, fmt.Errorf("exceeded maximum of %d inline files per request", maxInlineFilesPerRequest)
+		err := fmt.Errorf("exceeded maximum of %d inline files per request", maxInlineFilesPerRequest)
+		return nil, true, &inlineFileUploadError{status: http.StatusBadRequest, message: err.Error(), err: err}
 	}
 	fileID, err := s.uploadInlineFile(decoded)
 	if err != nil {
 		return nil, true, &inlineFileUploadError{status: http.StatusInternalServerError, message: "Failed to upload inline file.", err: err}
 	}
 	s.uploadCount++
+	s.inlineFileBytes += len(decoded.Data)
 	replacement := map[string]any{
 		"type":    decoded.ReplacementType,
 		"file_id": fileID,
@@ -168,6 +185,7 @@ func (s *inlineUploadState) uploadInlineFile(file inlineDecodedFile) (string, er
 	result, err := s.handler.DS.UploadFile(s.ctx, s.auth, dsclient.UploadFileRequest{
 		Filename:    file.Filename,
 		ContentType: contentType,
+		ModelType:   s.modelType,
 		Data:        file.Data,
 	}, 3)
 	if err != nil {

internal/httpapi/openai/files/handler_files.go

@@ -8,6 +8,7 @@ import (
 
 	"ds2api/internal/auth"
 	"ds2api/internal/chathistory"
+	"ds2api/internal/config"
 	dsclient "ds2api/internal/deepseek/client"
 	"ds2api/internal/httpapi/openai/shared"
 )
@@ -66,10 +67,12 @@ func (h *Handler) UploadFile(w http.ResponseWriter, r *http.Request) {
 	if contentType == "" && len(data) > 0 {
 		contentType = http.DetectContentType(data)
 	}
+	modelType := resolveUploadModelType(h.Store, r)
 	result, err := h.DS.UploadFile(r.Context(), a, dsclient.UploadFileRequest{
 		Filename:    header.Filename,
 		ContentType: contentType,
 		Purpose:     strings.TrimSpace(r.FormValue("purpose")),
+		ModelType:   modelType,
 		Data:        data,
 	}, 3)
 	if err != nil {
@@ -82,6 +85,32 @@ func (h *Handler) UploadFile(w http.ResponseWriter, r *http.Request) {
 	shared.WriteJSON(w, http.StatusOK, buildOpenAIFileObject(result))
 }
 
+func resolveUploadModelType(store shared.ConfigReader, r *http.Request) string {
+	for _, candidate := range []string{r.FormValue("model_type"), r.Header.Get("X-Model-Type")} {
+		if modelType := normalizeUploadModelType(candidate); modelType != "" {
+			return modelType
+		}
+	}
+	requestedModel := strings.TrimSpace(r.FormValue("model"))
+	if requestedModel != "" {
+		if resolvedModel, ok := config.ResolveModel(store, requestedModel); ok {
+			if modelType, ok := config.GetModelType(resolvedModel); ok {
+				return modelType
+			}
+		}
+	}
+	return "default"
+}
+
+func normalizeUploadModelType(raw string) string {
+	switch strings.ToLower(strings.TrimSpace(raw)) {
+	case "default", "expert", "vision":
+		return strings.ToLower(strings.TrimSpace(raw))
+	default:
+		return ""
+	}
+}
+
 func buildOpenAIFileObject(result *dsclient.UploadFileResult) map[string]any {
 	if result == nil {
 		obj := map[string]any{

internal/httpapi/openai/files_route_test.go

@@ -77,7 +77,7 @@ func (m *filesRouteDSStub) DeleteAllSessionsForToken(_ context.Context, _ string
 	return nil
 }
 
-func newMultipartUploadRequest(t *testing.T, purpose string, filename string, data []byte) *http.Request {
+func newMultipartUploadRequest(t *testing.T, purpose string, filename string, data []byte, model string) *http.Request {
 	t.Helper()
 	var body bytes.Buffer
 	writer := multipart.NewWriter(&body)
@@ -86,6 +86,11 @@ func newMultipartUploadRequest(t *testing.T, purpose string, filename string, da
 			t.Fatalf("write purpose failed: %v", err)
 		}
 	}
+	if model != "" {
+		if err := writer.WriteField("model", model); err != nil {
+			t.Fatalf("write model failed: %v", err)
+		}
+	}
 	part, err := writer.CreateFormFile("file", filename)
 	if err != nil {
 		t.Fatalf("create form file failed: %v", err)
@@ -108,7 +113,7 @@ func TestFilesRouteUploadSuccess(t *testing.T) {
 	r := chi.NewRouter()
 	registerOpenAITestRoutes(r, h)
 
-	req := newMultipartUploadRequest(t, "assistants", "notes.txt", []byte("hello world"))
+	req := newMultipartUploadRequest(t, "assistants", "notes.txt", []byte("hello world"), "deepseek-v4-vision")
 	rec := httptest.NewRecorder()
 	r.ServeHTTP(rec, req)
 
@@ -121,6 +126,9 @@ func TestFilesRouteUploadSuccess(t *testing.T) {
 	if ds.lastReq.Purpose != "assistants" {
 		t.Fatalf("expected purpose assistants, got %q", ds.lastReq.Purpose)
 	}
+	if ds.lastReq.ModelType != "vision" {
+		t.Fatalf("expected vision model type, got %q", ds.lastReq.ModelType)
+	}
 	if string(ds.lastReq.Data) != "hello world" {
 		t.Fatalf("unexpected uploaded data: %q", string(ds.lastReq.Data))
 	}
@@ -145,7 +153,7 @@ func TestFilesRouteUploadIncludesAccountIDForManagedAccount(t *testing.T) {
 	r := chi.NewRouter()
 	registerOpenAITestRoutes(r, h)
 
-	req := newMultipartUploadRequest(t, "assistants", "notes.txt", []byte("hello world"))
+	req := newMultipartUploadRequest(t, "assistants", "notes.txt", []byte("hello world"), "deepseek-v4-vision")
 	rec := httptest.NewRecorder()
 	r.ServeHTTP(rec, req)
 

internal/httpapi/openai/history/current_input_file.go

@@ -7,13 +7,14 @@ import (
 	"strings"
 
 	"ds2api/internal/auth"
+	"ds2api/internal/config"
 	dsclient "ds2api/internal/deepseek/client"
 	"ds2api/internal/httpapi/openai/shared"
 	"ds2api/internal/promptcompat"
 )
 
 const (
-	currentInputFilename    = "IGNORE.txt"
+	currentInputFilename    = promptcompat.CurrentInputContextFilename
 	currentInputContentType = "text/plain; charset=utf-8"
 	currentInputPurpose     = "assistants"
 )
@@ -35,11 +36,15 @@ func (s Service) ApplyCurrentInputFile(ctx context.Context, a *auth.RequestAuth,
 	if strings.TrimSpace(fileText) == "" {
 		return stdReq, errors.New("current user input file produced empty transcript")
 	}
-
+	modelType := "default"
+	if resolvedType, ok := config.GetModelType(stdReq.ResolvedModel); ok {
+		modelType = resolvedType
+	}
 	result, err := s.DS.UploadFile(ctx, a, dsclient.UploadFileRequest{
 		Filename:    currentInputFilename,
 		ContentType: currentInputContentType,
 		Purpose:     currentInputPurpose,
+		ModelType:   modelType,
 		Data:        []byte(fileText),
 	}, 3)
 	if err != nil {
@@ -58,9 +63,13 @@ func (s Service) ApplyCurrentInputFile(ctx context.Context, a *auth.RequestAuth,
 	}
 
 	stdReq.Messages = messages
+	stdReq.HistoryText = fileText
 	stdReq.CurrentInputFileApplied = true
 	stdReq.RefFileIDs = prependUniqueRefFileID(stdReq.RefFileIDs, fileID)
 	stdReq.FinalPrompt, stdReq.ToolNames = promptcompat.BuildOpenAIPrompt(messages, stdReq.ToolsRaw, "", stdReq.ToolChoice, stdReq.Thinking)
+	// Token accounting must reflect the actual downstream context:
+	// the uploaded DS2API_HISTORY.txt file content + the continuation live prompt.
+	stdReq.PromptTokenText = fileText + "\n" + stdReq.FinalPrompt
 	return stdReq, nil
 }
 
@@ -84,5 +93,5 @@ func latestUserInputForFile(messages []any) (int, string) {
 }
 
 func currentInputFilePrompt() string {
-	return "The current request and prior conversation context have already been provided. Answer the latest user request directly."
+	return "Continue from the latest state in the attached DS2API_HISTORY.txt context. Treat it as the current working state and answer the latest user request directly."
 }

internal/httpapi/openai/history_split_test.go

@@ -14,6 +14,7 @@ import (
 	"ds2api/internal/auth"
 	dsclient "ds2api/internal/deepseek/client"
 	"ds2api/internal/promptcompat"
+	"ds2api/internal/util"
 )
 
 func historySplitTestMessages() []any {
@@ -60,27 +61,32 @@ func (streamStatusManagedAuthStub) DetermineCaller(_ *http.Request) (*auth.Reque
 
 func (streamStatusManagedAuthStub) Release(_ *auth.RequestAuth) {}
 
-func TestBuildOpenAICurrentInputContextTranscriptUsesInjectedFileWrapper(t *testing.T) {
+func TestBuildOpenAICurrentInputContextTranscriptUsesNumberedHistorySections(t *testing.T) {
 	_, historyMessages := splitOpenAIHistoryMessages(historySplitTestMessages(), 1)
 	transcript := buildOpenAICurrentInputContextTranscript(historyMessages)
 
-	if !strings.HasPrefix(transcript, "[file content end]\n\n") {
-		t.Fatalf("expected injected file wrapper prefix, got %q", transcript)
+	if strings.Contains(transcript, "[file content end]") || strings.Contains(transcript, "[file content begin]") || strings.Contains(transcript, "[file name]:") {
+		t.Fatalf("expected transcript without file wrapper tags, got %q", transcript)
 	}
-	if !strings.Contains(transcript, "<｜begin▁of▁sentence｜>") {
-		t.Fatalf("expected serialized conversation markers, got %q", transcript)
+	if !strings.Contains(transcript, "# DS2API_HISTORY.txt") {
+		t.Fatalf("expected history transcript header, got %q", transcript)
 	}
-	if !strings.Contains(transcript, "first user turn") || !strings.Contains(transcript, "tool result") {
-		t.Fatalf("expected historical turns preserved, got %q", transcript)
+	if !strings.Contains(transcript, "Prior conversation history and tool progress.") {
+		t.Fatalf("expected history transcript description, got %q", transcript)
 	}
-	if !strings.Contains(transcript, "[reasoning_content]") || !strings.Contains(transcript, "hidden reasoning") {
-		t.Fatalf("expected reasoning block preserved, got %q", transcript)
-	}
-	if !strings.Contains(transcript, "<|DSML|tool_calls>") {
-		t.Fatalf("expected tool calls preserved, got %q", transcript)
-	}
-	if !strings.HasSuffix(transcript, "\n[file name]: IGNORE\n[file content begin]\n") {
-		t.Fatalf("expected injected file wrapper suffix, got %q", transcript)
+	for _, want := range []string{
+		"=== 1. USER ===",
+		"=== 2. ASSISTANT ===",
+		"=== 3. TOOL ===",
+		"first user turn",
+		"tool result",
+		"[reasoning_content]",
+		"hidden reasoning",
+		"<|DSML|tool_calls>",
+	} {
+		if !strings.Contains(transcript, want) {
+			t.Fatalf("expected transcript to contain %q, got %q", want, transcript)
+		}
 	}
 }
 
@@ -221,7 +227,7 @@ func TestApplyCurrentInputFileDisabledPassThrough(t *testing.T) {
 		DS: ds,
 	}
 	req := map[string]any{
-		"model":    "deepseek-v4-flash",
+		"model":    "deepseek-v4-vision",
 		"messages": historySplitTestMessages(),
 	}
 	stdReq, err := promptcompat.NormalizeOpenAIChatRequest(h.Store, req, "")
@@ -244,7 +250,7 @@ func TestApplyCurrentInputFileDisabledPassThrough(t *testing.T) {
 	}
 }
 
-func TestApplyCurrentInputFileUploadsFirstTurnWithInjectedWrapper(t *testing.T) {
+func TestApplyCurrentInputFileUploadsFirstTurnWithNumberedHistoryTranscript(t *testing.T) {
 	ds := &inlineUploadDSStub{}
 	h := &openAITestSurface{
 		Store: mockOpenAIConfig{
@@ -274,34 +280,90 @@ func TestApplyCurrentInputFileUploadsFirstTurnWithInjectedWrapper(t *testing.T)
 		t.Fatalf("expected 1 current input upload, got %d", len(ds.uploadCalls))
 	}
 	upload := ds.uploadCalls[0]
-	if upload.Filename != "IGNORE.txt" {
+	if upload.Filename != "DS2API_HISTORY.txt" {
 		t.Fatalf("unexpected upload filename: %q", upload.Filename)
 	}
 	uploadedText := string(upload.Data)
-	if !strings.HasPrefix(uploadedText, "[file content end]\n\n") {
-		t.Fatalf("expected injected file wrapper prefix, got %q", uploadedText)
+	if strings.Contains(uploadedText, "[file content end]") || strings.Contains(uploadedText, "[file content begin]") || strings.Contains(uploadedText, "[file name]:") {
+		t.Fatalf("expected uploaded transcript without file wrapper tags, got %q", uploadedText)
 	}
-	if !strings.Contains(uploadedText, "<｜begin▁of▁sentence｜><｜User｜>first turn content that is long enough") {
-		t.Fatalf("expected serialized current user turn markers, got %q", uploadedText)
+	for _, want := range []string{
+		"# DS2API_HISTORY.txt",
+		"=== 1. USER ===",
+		"first turn content that is long enough",
+	} {
+		if !strings.Contains(uploadedText, want) {
+			t.Fatalf("expected uploaded transcript to contain %q, got %q", want, uploadedText)
+		}
 	}
 	if !strings.Contains(uploadedText, promptcompat.ThinkingInjectionMarker) {
 		t.Fatalf("expected thinking injection in current input file, got %q", uploadedText)
 	}
-	if !strings.HasSuffix(uploadedText, "\n[file name]: IGNORE\n[file content begin]\n") {
-		t.Fatalf("expected injected file wrapper suffix, got %q", uploadedText)
-	}
+
 	if strings.Contains(out.FinalPrompt, "first turn content that is long enough") {
 		t.Fatalf("expected current input text to be replaced in live prompt, got %s", out.FinalPrompt)
 	}
-	if strings.Contains(out.FinalPrompt, "CURRENT_USER_INPUT.txt") || strings.Contains(out.FinalPrompt, "IGNORE.txt") || strings.Contains(out.FinalPrompt, "Read that file") {
+	if strings.Contains(out.FinalPrompt, "CURRENT_USER_INPUT.txt") || strings.Contains(out.FinalPrompt, "Read that file") {
 		t.Fatalf("expected live prompt not to instruct file reads, got %s", out.FinalPrompt)
 	}
-	if !strings.Contains(out.FinalPrompt, "Answer the latest user request directly.") {
-		t.Fatalf("expected neutral continuation instruction in live prompt, got %s", out.FinalPrompt)
+	if !strings.Contains(out.FinalPrompt, "Continue from the latest state in the attached DS2API_HISTORY.txt context.") {
+		t.Fatalf("expected continuation-oriented prompt in live prompt, got %s", out.FinalPrompt)
 	}
 	if len(out.RefFileIDs) != 1 || out.RefFileIDs[0] != "file-inline-1" {
 		t.Fatalf("expected current input file id in ref_file_ids, got %#v", out.RefFileIDs)
 	}
+	if !strings.Contains(out.PromptTokenText, "first turn content that is long enough") {
+		t.Fatalf("expected prompt token text to preserve original full context, got %q", out.PromptTokenText)
+	}
+	if !strings.Contains(out.PromptTokenText, "# DS2API_HISTORY.txt") || !strings.Contains(out.PromptTokenText, "=== 1. USER ===") {
+		t.Fatalf("expected prompt token text to include numbered history transcript, got %q", out.PromptTokenText)
+	}
+}
+
+func TestApplyCurrentInputFilePreservesFullContextPromptForTokenCounting(t *testing.T) {
+	ds := &inlineUploadDSStub{}
+	h := &openAITestSurface{
+		Store: mockOpenAIConfig{
+			wideInput:           true,
+			currentInputEnabled: true,
+			currentInputMin:     0,
+			thinkingInjection:   boolPtr(true),
+		},
+		DS: ds,
+	}
+	req := map[string]any{
+		"model":    "deepseek-v4-vision",
+		"messages": historySplitTestMessages(),
+	}
+	stdReq, err := promptcompat.NormalizeOpenAIChatRequest(h.Store, req, "")
+	if err != nil {
+		t.Fatalf("normalize failed: %v", err)
+	}
+
+	out, err := h.applyCurrentInputFile(context.Background(), &auth.RequestAuth{DeepSeekToken: "token"}, stdReq)
+	if err != nil {
+		t.Fatalf("apply current input file failed: %v", err)
+	}
+	if out.FinalPrompt == stdReq.FinalPrompt {
+		t.Fatalf("expected live prompt to be rewritten after current input file")
+	}
+	// PromptTokenText must include the uploaded file content (which contains the full context)
+	// plus the neutral live prompt — reflecting the actual downstream token cost.
+	if !strings.Contains(out.PromptTokenText, "first user turn") || !strings.Contains(out.PromptTokenText, "latest user turn") {
+		t.Fatalf("expected prompt token text to contain file context with full conversation, got %q", out.PromptTokenText)
+	}
+	if strings.Contains(out.PromptTokenText, "[file content end]") || strings.Contains(out.PromptTokenText, "[file name]:") {
+		t.Fatalf("expected prompt token text to omit file wrapper tags, got %q", out.PromptTokenText)
+	}
+	if !strings.Contains(out.PromptTokenText, "# DS2API_HISTORY.txt") || !strings.Contains(out.PromptTokenText, "=== 1. SYSTEM ===") {
+		t.Fatalf("expected prompt token text to include numbered history transcript, got %q", out.PromptTokenText)
+	}
+	if !strings.Contains(out.PromptTokenText, "Continue from the latest state in the attached DS2API_HISTORY.txt context.") {
+		t.Fatalf("expected prompt token text to also include continuation prompt, got %q", out.PromptTokenText)
+	}
+	if strings.Contains(out.FinalPrompt, "first user turn") || strings.Contains(out.FinalPrompt, "latest user turn") {
+		t.Fatalf("expected live prompt to hide original turns, got %q", out.FinalPrompt)
+	}
 }
 
 func TestApplyCurrentInputFileUploadsFullContextFile(t *testing.T) {
@@ -316,7 +378,7 @@ func TestApplyCurrentInputFileUploadsFullContextFile(t *testing.T) {
 		DS: ds,
 	}
 	req := map[string]any{
-		"model":    "deepseek-v4-flash",
+		"model":    "deepseek-v4-vision",
 		"messages": historySplitTestMessages(),
 	}
 	stdReq, err := promptcompat.NormalizeOpenAIChatRequest(h.Store, req, "")
@@ -335,24 +397,27 @@ func TestApplyCurrentInputFileUploadsFullContextFile(t *testing.T) {
 		t.Fatalf("expected one current input upload, got %d", len(ds.uploadCalls))
 	}
 	upload := ds.uploadCalls[0]
-	if upload.Filename != "IGNORE.txt" {
-		t.Fatalf("expected IGNORE.txt upload, got %q", upload.Filename)
+	if upload.Filename != "DS2API_HISTORY.txt" {
+		t.Fatalf("expected DS2API_HISTORY.txt upload, got %q", upload.Filename)
+	}
+	if upload.ModelType != "vision" {
+		t.Fatalf("expected vision model type for vision request, got %q", upload.ModelType)
 	}
 	uploadedText := string(upload.Data)
-	for _, want := range []string{"system instructions", "first user turn", "hidden reasoning", "tool result", "latest user turn", promptcompat.ThinkingInjectionMarker} {
+	for _, want := range []string{"# DS2API_HISTORY.txt", "=== 1. SYSTEM ===", "=== 2. USER ===", "=== 3. ASSISTANT ===", "=== 4. TOOL ===", "=== 5. USER ===", "system instructions", "first user turn", "hidden reasoning", "tool result", "latest user turn", promptcompat.ThinkingInjectionMarker} {
 		if !strings.Contains(uploadedText, want) {
 			t.Fatalf("expected full context file to contain %q, got %q", want, uploadedText)
 		}
 	}
-	if strings.Contains(out.FinalPrompt, "first user turn") || strings.Contains(out.FinalPrompt, "latest user turn") || strings.Contains(out.FinalPrompt, "CURRENT_USER_INPUT.txt") || strings.Contains(out.FinalPrompt, "IGNORE.txt") || strings.Contains(out.FinalPrompt, "Read that file") {
-		t.Fatalf("expected live prompt to use only a neutral continuation instruction, got %s", out.FinalPrompt)
+	if strings.Contains(out.FinalPrompt, "first user turn") || strings.Contains(out.FinalPrompt, "latest user turn") || strings.Contains(out.FinalPrompt, "CURRENT_USER_INPUT.txt") || strings.Contains(out.FinalPrompt, "Read that file") {
+		t.Fatalf("expected live prompt to use only a continuation instruction, got %s", out.FinalPrompt)
 	}
-	if !strings.Contains(out.FinalPrompt, "Answer the latest user request directly.") {
-		t.Fatalf("expected neutral continuation instruction in live prompt, got %s", out.FinalPrompt)
+	if !strings.Contains(out.FinalPrompt, "Continue from the latest state in the attached DS2API_HISTORY.txt context.") {
+		t.Fatalf("expected continuation-oriented prompt in live prompt, got %s", out.FinalPrompt)
 	}
 }
 
-func TestApplyCurrentInputFileLeavesHistoryTextEmpty(t *testing.T) {
+func TestApplyCurrentInputFileCarriesHistoryText(t *testing.T) {
 	ds := &inlineUploadDSStub{}
 	h := &openAITestSurface{
 		Store: mockOpenAIConfig{
@@ -377,8 +442,11 @@ func TestApplyCurrentInputFileLeavesHistoryTextEmpty(t *testing.T) {
 	if len(ds.uploadCalls) != 1 {
 		t.Fatalf("expected 1 upload call, got %d", len(ds.uploadCalls))
 	}
-	if out.HistoryText != "" {
-		t.Fatalf("expected current input file flow to leave history text empty, got %q", out.HistoryText)
+	if out.HistoryText != string(ds.uploadCalls[0].Data) {
+		t.Fatalf("expected current input file flow to preserve uploaded text in history, got %q", out.HistoryText)
+	}
+	if !strings.Contains(out.HistoryText, "# DS2API_HISTORY.txt") || !strings.Contains(out.HistoryText, "=== 1. SYSTEM ===") {
+		t.Fatalf("expected history text to use numbered transcript format, got %q", out.HistoryText)
 	}
 }
 
@@ -411,15 +479,18 @@ func TestChatCompletionsCurrentInputFileUploadsContextAndKeepsNeutralPrompt(t *t
 		t.Fatalf("expected 1 upload call, got %d", len(ds.uploadCalls))
 	}
 	upload := ds.uploadCalls[0]
-	if upload.Filename != "IGNORE.txt" {
+	if upload.Filename != "DS2API_HISTORY.txt" {
 		t.Fatalf("unexpected upload filename: %q", upload.Filename)
 	}
 	if upload.Purpose != "assistants" {
 		t.Fatalf("unexpected purpose: %q", upload.Purpose)
 	}
 	historyText := string(upload.Data)
-	if !strings.Contains(historyText, "[file content end]") || !strings.Contains(historyText, "[file name]: IGNORE") {
-		t.Fatalf("expected injected IGNORE wrapper, got %s", historyText)
+	if strings.Contains(historyText, "[file content end]") || strings.Contains(historyText, "[file content begin]") || strings.Contains(historyText, "[file name]:") {
+		t.Fatalf("expected history transcript without file wrapper tags, got %s", historyText)
+	}
+	if !strings.Contains(historyText, "# DS2API_HISTORY.txt") || !strings.Contains(historyText, "=== 1. SYSTEM ===") {
+		t.Fatalf("expected history transcript to use numbered sections, got %s", historyText)
 	}
 	if !strings.Contains(historyText, "latest user turn") {
 		t.Fatalf("expected full context to include latest turn, got %s", historyText)
@@ -428,8 +499,8 @@ func TestChatCompletionsCurrentInputFileUploadsContextAndKeepsNeutralPrompt(t *t
 		t.Fatal("expected completion payload to be captured")
 	}
 	promptText, _ := ds.completionReq["prompt"].(string)
-	if !strings.Contains(promptText, "Answer the latest user request directly.") {
-		t.Fatalf("expected neutral completion prompt, got %s", promptText)
+	if !strings.Contains(promptText, "Continue from the latest state in the attached DS2API_HISTORY.txt context.") {
+		t.Fatalf("expected continuation-oriented prompt, got %s", promptText)
 	}
 	if strings.Contains(promptText, "first user turn") || strings.Contains(promptText, "latest user turn") {
 		t.Fatalf("expected prompt to hide original turns, got %s", promptText)
@@ -438,6 +509,16 @@ func TestChatCompletionsCurrentInputFileUploadsContextAndKeepsNeutralPrompt(t *t
 	if len(refIDs) == 0 || refIDs[0] != "file-inline-1" {
 		t.Fatalf("expected uploaded current input file to be first ref_file_id, got %#v", ds.completionReq["ref_file_ids"])
 	}
+	var body map[string]any
+	if err := json.Unmarshal(rec.Body.Bytes(), &body); err != nil {
+		t.Fatalf("decode response failed: %v", err)
+	}
+	usage, _ := body["usage"].(map[string]any)
+	promptTokens := int(usage["prompt_tokens"].(float64))
+	neutralCount := util.CountPromptTokens(promptText, "deepseek-v4-flash")
+	if promptTokens <= neutralCount {
+		t.Fatalf("expected prompt_tokens to exceed neutral live prompt count (includes file context), got=%d neutral=%d", promptTokens, neutralCount)
+	}
 }
 
 func TestResponsesCurrentInputFileUploadsContextAndKeepsNeutralPrompt(t *testing.T) {
@@ -470,16 +551,30 @@ func TestResponsesCurrentInputFileUploadsContextAndKeepsNeutralPrompt(t *testing
 	if len(ds.uploadCalls) != 1 {
 		t.Fatalf("expected 1 upload call, got %d", len(ds.uploadCalls))
 	}
+	historyText := string(ds.uploadCalls[0].Data)
+	if !strings.Contains(historyText, "# DS2API_HISTORY.txt") || !strings.Contains(historyText, "=== 1. SYSTEM ===") {
+		t.Fatalf("expected uploaded history text to use numbered transcript format, got %s", historyText)
+	}
 	if ds.completionReq == nil {
 		t.Fatal("expected completion payload to be captured")
 	}
 	promptText, _ := ds.completionReq["prompt"].(string)
-	if !strings.Contains(promptText, "Answer the latest user request directly.") {
-		t.Fatalf("expected neutral completion prompt, got %s", promptText)
+	if !strings.Contains(promptText, "Continue from the latest state in the attached DS2API_HISTORY.txt context.") {
+		t.Fatalf("expected continuation-oriented prompt, got %s", promptText)
 	}
 	if strings.Contains(promptText, "first user turn") || strings.Contains(promptText, "latest user turn") {
 		t.Fatalf("expected prompt to hide original turns, got %s", promptText)
 	}
+	var body map[string]any
+	if err := json.Unmarshal(rec.Body.Bytes(), &body); err != nil {
+		t.Fatalf("decode response failed: %v", err)
+	}
+	usage, _ := body["usage"].(map[string]any)
+	inputTokens := int(usage["input_tokens"].(float64))
+	neutralCount := util.CountPromptTokens(promptText, "deepseek-v4-flash")
+	if inputTokens <= neutralCount {
+		t.Fatalf("expected input_tokens to exceed neutral live prompt count (includes file context), got=%d neutral=%d", inputTokens, neutralCount)
+	}
 }
 
 func TestChatCompletionsCurrentInputFileMapsManagedAuthFailureTo401(t *testing.T) {
@@ -606,11 +701,15 @@ func TestCurrentInputFileWorksAcrossAutoDeleteModes(t *testing.T) {
 			if len(ds.uploadCalls) != 1 {
 				t.Fatalf("expected current input upload for mode=%s, got %d", mode, len(ds.uploadCalls))
 			}
+			historyText := string(ds.uploadCalls[0].Data)
+			if !strings.Contains(historyText, "# DS2API_HISTORY.txt") || !strings.Contains(historyText, "=== 1. SYSTEM ===") {
+				t.Fatalf("expected uploaded history text to use numbered transcript format, got %s", historyText)
+			}
 			if ds.completionReq == nil {
 				t.Fatalf("expected completion payload for mode=%s", mode)
 			}
 			promptText, _ := ds.completionReq["prompt"].(string)
-			if !strings.Contains(promptText, "Answer the latest user request directly.") || strings.Contains(promptText, "first user turn") || strings.Contains(promptText, "latest user turn") {
+			if !strings.Contains(promptText, "Continue from the latest state in the attached DS2API_HISTORY.txt context.") || strings.Contains(promptText, "first user turn") || strings.Contains(promptText, "latest user turn") {
 				t.Fatalf("unexpected prompt for mode=%s: %s", mode, promptText)
 			}
 		})

internal/httpapi/openai/leaked_output_sanitize_test.go

@@ -42,6 +42,14 @@ func TestSanitizeLeakedOutputRemovesDanglingThinkBlock(t *testing.T) {
 	}
 }
 
+func TestSanitizeLeakedOutputRemovesCompleteDSMLToolCallWrapper(t *testing.T) {
+	raw := "前置文本\n<｜DSML｜tool_calls>\n<｜DSML｜invoke name=\"Bash\">\n<｜DSML｜parameter name=\"command\"></｜DSML｜parameter>\n</｜DSML｜invoke>\n</｜DSML｜tool_calls>\n后置文本"
+	got := sanitizeLeakedOutput(raw)
+	if got != "前置文本\n\n后置文本" {
+		t.Fatalf("unexpected sanitize result for leaked dsml wrapper: %q", got)
+	}
+}
+
 func TestSanitizeLeakedOutputRemovesAgentXMLLeaks(t *testing.T) {
 	raw := "Done.<attempt_completion><result>Some final answer</result></attempt_completion>"
 	got := sanitizeLeakedOutput(raw)

internal/httpapi/openai/responses/empty_retry_runtime.go

@@ -18,6 +18,8 @@ import (
 )
 
 type responsesNonStreamResult struct {
+	rawThinking           string
+	rawText               string
 	thinking              string
 	toolDetectionThinking string
 	text                  string
@@ -27,11 +29,12 @@ type responsesNonStreamResult struct {
 	responseMessageID     int
 }
 
-func (h *Handler) handleResponsesNonStreamWithRetry(w http.ResponseWriter, ctx context.Context, a *auth.RequestAuth, resp *http.Response, payload map[string]any, pow, owner, responseID, model, finalPrompt string, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, toolChoice promptcompat.ToolChoicePolicy, traceID string) {
+func (h *Handler) handleResponsesNonStreamWithRetry(w http.ResponseWriter, ctx context.Context, a *auth.RequestAuth, resp *http.Response, payload map[string]any, pow, owner, responseID, model, finalPrompt string, refFileTokens int, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, toolChoice promptcompat.ToolChoicePolicy, traceID string) {
 	attempts := 0
 	currentResp := resp
 	usagePrompt := finalPrompt
 	accumulatedThinking := ""
+	accumulatedRawThinking := ""
 	accumulatedToolDetectionThinking := ""
 	for {
 		result, ok := h.collectResponsesNonStreamAttempt(w, currentResp, responseID, model, usagePrompt, thinkingEnabled, searchEnabled, toolNames, toolsRaw)
@@ -39,11 +42,16 @@ func (h *Handler) handleResponsesNonStreamWithRetry(w http.ResponseWriter, ctx c
 			return
 		}
 		accumulatedThinking += sse.TrimContinuationOverlap(accumulatedThinking, result.thinking)
+		accumulatedRawThinking += sse.TrimContinuationOverlap(accumulatedRawThinking, result.rawThinking)
 		accumulatedToolDetectionThinking += sse.TrimContinuationOverlap(accumulatedToolDetectionThinking, result.toolDetectionThinking)
 		result.thinking = accumulatedThinking
+		result.rawThinking = accumulatedRawThinking
 		result.toolDetectionThinking = accumulatedToolDetectionThinking
-		result.parsed = detectAssistantToolCalls(result.text, result.thinking, result.toolDetectionThinking, toolNames)
+		result.parsed = detectAssistantToolCalls(result.rawText, result.text, result.rawThinking, result.toolDetectionThinking, toolNames)
 		result.body = openaifmt.BuildResponseObjectWithToolCalls(responseID, model, usagePrompt, result.thinking, result.text, result.parsed.Calls, toolsRaw)
+		if refFileTokens > 0 {
+			addRefFileTokensToUsage(result.body, refFileTokens)
+		}
 
 		if !shouldRetryResponsesNonStream(result, attempts) {
 			h.finishResponsesNonStreamResult(w, result, attempts, owner, responseID, toolChoice, traceID)
@@ -63,7 +71,7 @@ func (h *Handler) handleResponsesNonStreamWithRetry(w http.ResponseWriter, ctx c
 			config.Logger.Warn("[openai_empty_retry] retry request failed", "surface", "responses", "stream", false, "retry_attempt", attempts, "error", err)
 			return
 		}
-		usagePrompt = usagePromptWithEmptyOutputRetry(finalPrompt, attempts)
+		usagePrompt = usagePromptWithEmptyOutputRetry(usagePrompt, attempts)
 		currentResp = nextResp
 	}
 }
@@ -78,16 +86,17 @@ func (h *Handler) collectResponsesNonStreamAttempt(w http.ResponseWriter, resp *
 	result := sse.CollectStream(resp, thinkingEnabled, false)
 	stripReferenceMarkers := h.compatStripReferenceMarkers()
 	sanitizedThinking := cleanVisibleOutput(result.Thinking, stripReferenceMarkers)
-	toolDetectionThinking := cleanVisibleOutput(result.ToolDetectionThinking, stripReferenceMarkers)
 	sanitizedText := cleanVisibleOutput(result.Text, stripReferenceMarkers)
 	if searchEnabled {
 		sanitizedText = replaceCitationMarkersWithLinks(sanitizedText, result.CitationLinks)
 	}
-	textParsed := detectAssistantToolCalls(sanitizedText, sanitizedThinking, toolDetectionThinking, toolNames)
+	textParsed := detectAssistantToolCalls(result.Text, sanitizedText, result.Thinking, result.ToolDetectionThinking, toolNames)
 	responseObj := openaifmt.BuildResponseObjectWithToolCalls(responseID, model, usagePrompt, sanitizedThinking, sanitizedText, textParsed.Calls, toolsRaw)
 	return responsesNonStreamResult{
+		rawThinking:           result.Thinking,
+		rawText:               result.Text,
 		thinking:              sanitizedThinking,
-		toolDetectionThinking: toolDetectionThinking,
+		toolDetectionThinking: result.ToolDetectionThinking,
 		text:                  sanitizedText,
 		contentFilter:         result.ContentFilter,
 		parsed:                textParsed,
@@ -123,8 +132,8 @@ func shouldRetryResponsesNonStream(result responsesNonStreamResult, attempts int
 		strings.TrimSpace(result.text) == ""
 }
 
-func (h *Handler) handleResponsesStreamWithRetry(w http.ResponseWriter, r *http.Request, a *auth.RequestAuth, resp *http.Response, payload map[string]any, pow, owner, responseID, model, finalPrompt string, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, toolChoice promptcompat.ToolChoicePolicy, traceID string) {
-	streamRuntime, initialType, ok := h.prepareResponsesStreamRuntime(w, resp, owner, responseID, model, finalPrompt, thinkingEnabled, searchEnabled, toolNames, toolsRaw, toolChoice, traceID)
+func (h *Handler) handleResponsesStreamWithRetry(w http.ResponseWriter, r *http.Request, a *auth.RequestAuth, resp *http.Response, payload map[string]any, pow, owner, responseID, model, finalPrompt string, refFileTokens int, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, toolChoice promptcompat.ToolChoicePolicy, traceID string) {
+	streamRuntime, initialType, ok := h.prepareResponsesStreamRuntime(w, resp, owner, responseID, model, finalPrompt, refFileTokens, thinkingEnabled, searchEnabled, toolNames, toolsRaw, toolChoice, traceID)
 	if !ok {
 		return
 	}
@@ -165,7 +174,7 @@ func (h *Handler) handleResponsesStreamWithRetry(w http.ResponseWriter, r *http.
 	}
 }
 
-func (h *Handler) prepareResponsesStreamRuntime(w http.ResponseWriter, resp *http.Response, owner, responseID, model, finalPrompt string, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, toolChoice promptcompat.ToolChoicePolicy, traceID string) (*responsesStreamRuntime, string, bool) {
+func (h *Handler) prepareResponsesStreamRuntime(w http.ResponseWriter, resp *http.Response, owner, responseID, model, finalPrompt string, refFileTokens int, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, toolChoice promptcompat.ToolChoicePolicy, traceID string) (*responsesStreamRuntime, string, bool) {
 	if resp.StatusCode != http.StatusOK {
 		defer func() { _ = resp.Body.Close() }()
 		body, _ := io.ReadAll(resp.Body)
@@ -190,6 +199,7 @@ func (h *Handler) prepareResponsesStreamRuntime(w http.ResponseWriter, resp *htt
 			h.getResponseStore().put(owner, responseID, obj)
 		},
 	)
+	streamRuntime.refFileTokens = refFileTokens
 	streamRuntime.sendCreated()
 	return streamRuntime, initialType, true
 }
@@ -212,7 +222,13 @@ func (h *Handler) consumeResponsesStreamAttempt(r *http.Request, resp *http.Resp
 				finalReason = "content_filter"
 			}
 		},
+		OnContextDone: func() {
+			streamRuntime.markContextCancelled()
+		},
 	})
+	if streamRuntime.finalErrorCode == string(streamengine.StopReasonContextCancelled) {
+		return true, false
+	}
 	terminalWritten := streamRuntime.finalize(finalReason, allowDeferEmpty && finalReason != "content_filter")
 	if terminalWritten {
 		return true, false
@@ -225,6 +241,10 @@ func logResponsesStreamTerminal(streamRuntime *responsesStreamRuntime, attempts
 	if attempts > 0 {
 		source = "synthetic_retry"
 	}
+	if streamRuntime.finalErrorCode == string(streamengine.StopReasonContextCancelled) {
+		config.Logger.Info("[openai_empty_retry] terminal cancelled", "surface", "responses", "stream", true, "retry_attempts", attempts, "error_code", streamRuntime.finalErrorCode)
+		return
+	}
 	if streamRuntime.failed {
 		config.Logger.Info("[openai_empty_retry] terminal empty output", "surface", "responses", "stream", true, "retry_attempts", attempts, "success_source", "none", "error_code", streamRuntime.finalErrorCode)
 		return

internal/httpapi/openai/responses/empty_retry_runtime_test.go

@@ -0,0 +1,70 @@
+package responses
+
+import (
+	"context"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"ds2api/internal/promptcompat"
+	"ds2api/internal/stream"
+)
+
+func makeResponsesOpenAISSEHTTPResponse(lines ...string) *http.Response {
+	body := strings.Join(lines, "\n")
+	if !strings.HasSuffix(body, "\n") {
+		body += "\n"
+	}
+	return &http.Response{
+		StatusCode: http.StatusOK,
+		Header:     make(http.Header),
+		Body:       io.NopCloser(strings.NewReader(body)),
+	}
+}
+
+func TestConsumeResponsesStreamAttemptMarksContextCancelledState(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+
+	req := httptest.NewRequest(http.MethodPost, "/v1/responses", nil).WithContext(ctx)
+	rec := httptest.NewRecorder()
+	streamRuntime := newResponsesStreamRuntime(
+		rec,
+		http.NewResponseController(rec),
+		true,
+		"resp-cancelled",
+		"deepseek-v4-flash",
+		"prompt",
+		false,
+		false,
+		true,
+		nil,
+		nil,
+		false,
+		false,
+		promptcompat.DefaultToolChoicePolicy(),
+		"",
+		nil,
+	)
+	resp := makeResponsesOpenAISSEHTTPResponse(
+		`data: {"p":"response/content","v":"hello"}`,
+		`data: [DONE]`,
+	)
+
+	h := &Handler{}
+	terminalWritten, retryable := h.consumeResponsesStreamAttempt(req, resp, streamRuntime, "text", false, true)
+	if !terminalWritten || retryable {
+		t.Fatalf("expected cancelled attempt to terminate without retry, got terminalWritten=%v retryable=%v", terminalWritten, retryable)
+	}
+	if !streamRuntime.failed {
+		t.Fatalf("expected cancelled response stream to be marked failed")
+	}
+	if got, want := streamRuntime.finalErrorCode, string(stream.StopReasonContextCancelled); got != want {
+		t.Fatalf("expected cancelled final error code %q, got %q", want, got)
+	}
+	if streamRuntime.finalErrorMessage == "" {
+		t.Fatalf("expected cancelled final error message to be preserved")
+	}
+}

internal/httpapi/openai/responses/handler.go

@@ -130,6 +130,6 @@ func filterIncrementalToolCallDeltasByAllowed(deltas []toolstream.ToolCallDelta,
 	return shared.FilterIncrementalToolCallDeltasByAllowed(deltas, seenNames)
 }
 
-func detectAssistantToolCalls(text, exposedThinking, detectionThinking string, toolNames []string) toolcall.ToolCallParseResult {
-	return shared.DetectAssistantToolCalls(text, exposedThinking, detectionThinking, toolNames)
+func detectAssistantToolCalls(rawText, visibleText, exposedThinking, detectionThinking string, toolNames []string) toolcall.ToolCallParseResult {
+	return shared.DetectAssistantToolCalls(rawText, visibleText, exposedThinking, detectionThinking, toolNames)
 }

internal/httpapi/openai/responses/ref_file_tokens.go

@@ -0,0 +1,26 @@
+package responses
+
+// addRefFileTokensToUsage adds inline-uploaded file token estimates to an existing
+// usage map inside a response object. This keeps the token accounting aware of file
+// content that the upstream model processes but that is not part of the prompt text.
+func addRefFileTokensToUsage(obj map[string]any, refFileTokens int) {
+	if refFileTokens <= 0 || obj == nil {
+		return
+	}
+	usage, ok := obj["usage"].(map[string]any)
+	if !ok || usage == nil {
+		return
+	}
+	for _, key := range []string{"input_tokens", "prompt_tokens"} {
+		if v, ok := usage[key]; ok {
+			if n, ok := v.(int); ok {
+				usage[key] = n + refFileTokens
+			}
+		}
+	}
+	if v, ok := usage["total_tokens"]; ok {
+		if n, ok := v.(int); ok {
+			usage["total_tokens"] = n + refFileTokens
+		}
+	}
+}

internal/httpapi/openai/responses/responses_handler.go

@@ -114,14 +114,15 @@ func (h *Handler) Responses(w http.ResponseWriter, r *http.Request) {
 	}
 
 	responseID := "resp_" + strings.ReplaceAll(uuid.NewString(), "-", "")
+	refFileTokens := stdReq.RefFileTokens
 	if stdReq.Stream {
-		h.handleResponsesStreamWithRetry(w, r, a, resp, payload, pow, owner, responseID, stdReq.ResponseModel, stdReq.FinalPrompt, stdReq.Thinking, stdReq.Search, stdReq.ToolNames, stdReq.ToolsRaw, stdReq.ToolChoice, traceID)
+		h.handleResponsesStreamWithRetry(w, r, a, resp, payload, pow, owner, responseID, stdReq.ResponseModel, stdReq.PromptTokenText, refFileTokens, stdReq.Thinking, stdReq.Search, stdReq.ToolNames, stdReq.ToolsRaw, stdReq.ToolChoice, traceID)
 		return
 	}
-	h.handleResponsesNonStreamWithRetry(w, r.Context(), a, resp, payload, pow, owner, responseID, stdReq.ResponseModel, stdReq.FinalPrompt, stdReq.Thinking, stdReq.Search, stdReq.ToolNames, stdReq.ToolsRaw, stdReq.ToolChoice, traceID)
+	h.handleResponsesNonStreamWithRetry(w, r.Context(), a, resp, payload, pow, owner, responseID, stdReq.ResponseModel, stdReq.PromptTokenText, refFileTokens, stdReq.Thinking, stdReq.Search, stdReq.ToolNames, stdReq.ToolsRaw, stdReq.ToolChoice, traceID)
 }
 
-func (h *Handler) handleResponsesNonStream(w http.ResponseWriter, resp *http.Response, owner, responseID, model, finalPrompt string, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, toolChoice promptcompat.ToolChoicePolicy, traceID string) {
+func (h *Handler) handleResponsesNonStream(w http.ResponseWriter, resp *http.Response, owner, responseID, model, finalPrompt string, refFileTokens int, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, toolChoice promptcompat.ToolChoicePolicy, traceID string) {
 	defer func() { _ = resp.Body.Close() }()
 	if resp.StatusCode != http.StatusOK {
 		body, _ := io.ReadAll(resp.Body)
@@ -131,12 +132,11 @@ func (h *Handler) handleResponsesNonStream(w http.ResponseWriter, resp *http.Res
 	result := sse.CollectStream(resp, thinkingEnabled, true)
 	stripReferenceMarkers := h.compatStripReferenceMarkers()
 	sanitizedThinking := cleanVisibleOutput(result.Thinking, stripReferenceMarkers)
-	toolDetectionThinking := cleanVisibleOutput(result.ToolDetectionThinking, stripReferenceMarkers)
 	sanitizedText := cleanVisibleOutput(result.Text, stripReferenceMarkers)
 	if searchEnabled {
 		sanitizedText = replaceCitationMarkersWithLinks(sanitizedText, result.CitationLinks)
 	}
-	textParsed := detectAssistantToolCalls(sanitizedText, sanitizedThinking, toolDetectionThinking, toolNames)
+	textParsed := detectAssistantToolCalls(result.Text, sanitizedText, result.Thinking, result.ToolDetectionThinking, toolNames)
 	if len(textParsed.Calls) == 0 && writeUpstreamEmptyOutputError(w, sanitizedText, sanitizedThinking, result.ContentFilter) {
 		return
 	}
@@ -149,11 +149,14 @@ func (h *Handler) handleResponsesNonStream(w http.ResponseWriter, resp *http.Res
 	}
 
 	responseObj := openaifmt.BuildResponseObjectWithToolCalls(responseID, model, finalPrompt, sanitizedThinking, sanitizedText, textParsed.Calls, toolsRaw)
+	if refFileTokens > 0 {
+		addRefFileTokensToUsage(responseObj, refFileTokens)
+	}
 	h.getResponseStore().put(owner, responseID, responseObj)
 	writeJSON(w, http.StatusOK, responseObj)
 }
 
-func (h *Handler) handleResponsesStream(w http.ResponseWriter, r *http.Request, resp *http.Response, owner, responseID, model, finalPrompt string, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, toolChoice promptcompat.ToolChoicePolicy, traceID string) {
+func (h *Handler) handleResponsesStream(w http.ResponseWriter, r *http.Request, resp *http.Response, owner, responseID, model, finalPrompt string, refFileTokens int, thinkingEnabled, searchEnabled bool, toolNames []string, toolsRaw any, toolChoice promptcompat.ToolChoicePolicy, traceID string) {
 	defer func() { _ = resp.Body.Close() }()
 	if resp.StatusCode != http.StatusOK {
 		body, _ := io.ReadAll(resp.Body)
@@ -195,6 +198,7 @@ func (h *Handler) handleResponsesStream(w http.ResponseWriter, r *http.Request,
 			h.getResponseStore().put(owner, responseID, obj)
 		},
 	)
+	streamRuntime.refFileTokens = refFileTokens
 	streamRuntime.sendCreated()
 
 	streamengine.ConsumeSSE(streamengine.ConsumeConfig{

internal/httpapi/openai/responses/responses_stream_delta_batch.go

@@ -0,0 +1,39 @@
+package responses
+
+import (
+	"strings"
+
+	openaifmt "ds2api/internal/format/openai"
+)
+
+type responsesDeltaBatch struct {
+	runtime *responsesStreamRuntime
+	kind    string
+	text    strings.Builder
+}
+
+func (b *responsesDeltaBatch) append(kind, text string) {
+	if text == "" {
+		return
+	}
+	if b.kind != "" && b.kind != kind {
+		b.flush()
+	}
+	b.kind = kind
+	b.text.WriteString(text)
+}
+
+func (b *responsesDeltaBatch) flush() {
+	if b.kind == "" || b.text.Len() == 0 {
+		return
+	}
+	text := b.text.String()
+	switch b.kind {
+	case "reasoning":
+		b.runtime.sendEvent("response.reasoning.delta", openaifmt.BuildResponsesReasoningDeltaPayload(b.runtime.responseID, text))
+	case "text":
+		b.runtime.emitTextDelta(text)
+	}
+	b.kind = ""
+	b.text.Reset()
+}

internal/httpapi/openai/responses/responses_stream_runtime_core.go

@@ -18,13 +18,14 @@ type responsesStreamRuntime struct {
 	rc       *http.ResponseController
 	canFlush bool
 
-	responseID  string
-	model       string
-	finalPrompt string
-	toolNames   []string
-	toolsRaw    any
-	traceID     string
-	toolChoice  promptcompat.ToolChoicePolicy
+	responseID    string
+	model         string
+	finalPrompt   string
+	refFileTokens int
+	toolNames     []string
+	toolsRaw      any
+	traceID       string
+	toolChoice    promptcompat.ToolChoicePolicy
 
 	thinkingEnabled       bool
 	searchEnabled         bool
@@ -36,8 +37,10 @@ type responsesStreamRuntime struct {
 	toolCallsDoneEmitted bool
 
 	sieve                 toolstream.State
+	rawThinking           strings.Builder
 	thinking              strings.Builder
 	toolDetectionThinking strings.Builder
+	rawText               strings.Builder
 	text                  strings.Builder
 	visibleText           strings.Builder
 	responseMessageID     int
@@ -136,20 +139,26 @@ func (s *responsesStreamRuntime) failResponse(status int, message, code string)
 	s.sendDone()
 }
 
+func (s *responsesStreamRuntime) markContextCancelled() {
+	s.failed = true
+	s.finalErrorStatus = 499
+	s.finalErrorMessage = "request context cancelled"
+	s.finalErrorCode = string(streamengine.StopReasonContextCancelled)
+}
+
 func (s *responsesStreamRuntime) finalize(finishReason string, deferEmptyOutput bool) bool {
 	s.failed = false
 	s.finalErrorStatus = 0
 	s.finalErrorMessage = ""
 	s.finalErrorCode = ""
-	finalThinking := s.thinking.String()
-	finalToolDetectionThinking := s.toolDetectionThinking.String()
-	finalText := cleanVisibleOutput(s.text.String(), s.stripReferenceMarkers)
-
 	if s.bufferToolContent {
 		s.processToolStreamEvents(toolstream.Flush(&s.sieve, s.toolNames), true, true)
 	}
 
-	textParsed := detectAssistantToolCalls(finalText, finalThinking, finalToolDetectionThinking, s.toolNames)
+	finalThinking := s.thinking.String()
+	finalToolDetectionThinking := s.toolDetectionThinking.String()
+	finalText := cleanVisibleOutput(s.text.String(), s.stripReferenceMarkers)
+	textParsed := detectAssistantToolCalls(s.rawText.String(), finalText, s.rawThinking.String(), finalToolDetectionThinking, s.toolNames)
 	detected := textParsed.Calls
 	s.logToolPolicyRejections(textParsed)
 
@@ -220,6 +229,7 @@ func (s *responsesStreamRuntime) onParsed(parsed sse.LineResult) streamengine.Pa
 	}
 
 	contentSeen := false
+	batch := responsesDeltaBatch{runtime: s}
 	for _, p := range parsed.ToolDetectionThinkingParts {
 		trimmed := sse.TrimContinuationOverlap(s.toolDetectionThinking.String(), p.Text)
 		if trimmed != "" {
@@ -227,38 +237,53 @@ func (s *responsesStreamRuntime) onParsed(parsed sse.LineResult) streamengine.Pa
 		}
 	}
 	for _, p := range parsed.Parts {
-		cleanedText := cleanVisibleOutput(p.Text, s.stripReferenceMarkers)
-		if cleanedText == "" {
-			continue
-		}
-		if p.Type != "thinking" && s.searchEnabled && sse.IsCitation(cleanedText) {
-			continue
-		}
-		contentSeen = true
 		if p.Type == "thinking" {
+			rawTrimmed := sse.TrimContinuationOverlap(s.rawThinking.String(), p.Text)
+			if rawTrimmed != "" {
+				s.rawThinking.WriteString(rawTrimmed)
+				contentSeen = true
+			}
 			if !s.thinkingEnabled {
 				continue
 			}
+			cleanedText := cleanVisibleOutput(rawTrimmed, s.stripReferenceMarkers)
+			if cleanedText == "" {
+				continue
+			}
 			trimmed := sse.TrimContinuationOverlap(s.thinking.String(), cleanedText)
 			if trimmed == "" {
 				continue
 			}
 			s.thinking.WriteString(trimmed)
-			s.sendEvent("response.reasoning.delta", openaifmt.BuildResponsesReasoningDeltaPayload(s.responseID, trimmed))
+			batch.append("reasoning", trimmed)
 			continue
 		}
 
+		rawTrimmed := sse.TrimContinuationOverlap(s.rawText.String(), p.Text)
+		if rawTrimmed == "" {
+			continue
+		}
+		s.rawText.WriteString(rawTrimmed)
+		contentSeen = true
+		cleanedText := cleanVisibleOutput(rawTrimmed, s.stripReferenceMarkers)
+		if s.searchEnabled && sse.IsCitation(cleanedText) {
+			continue
+		}
 		trimmed := sse.TrimContinuationOverlap(s.text.String(), cleanedText)
-		if trimmed == "" {
-			continue
+		if trimmed != "" {
+			s.text.WriteString(trimmed)
 		}
-		s.text.WriteString(trimmed)
 		if !s.bufferToolContent {
-			s.emitTextDelta(trimmed)
+			if trimmed == "" {
+				continue
+			}
+			batch.append("text", trimmed)
 			continue
 		}
-		s.processToolStreamEvents(toolstream.ProcessChunk(&s.sieve, trimmed, s.toolNames), true, true)
+		batch.flush()
+		s.processToolStreamEvents(toolstream.ProcessChunk(&s.sieve, rawTrimmed, s.toolNames), true, true)
 	}
 
+	batch.flush()
 	return streamengine.ParsedDecision{ContentSeen: contentSeen}
 }

internal/httpapi/openai/responses/responses_stream_runtime_events.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 
 	openaifmt "ds2api/internal/format/openai"
+	"ds2api/internal/sse"
 	"ds2api/internal/toolstream"
 )
 
@@ -43,7 +44,10 @@ func (s *responsesStreamRuntime) sendDone() {
 func (s *responsesStreamRuntime) processToolStreamEvents(events []toolstream.Event, emitContent bool, resetAfterToolCalls bool) {
 	for _, evt := range events {
 		if emitContent && evt.Content != "" {
-			s.emitTextDelta(evt.Content)
+			cleaned := cleanVisibleOutput(evt.Content, s.stripReferenceMarkers)
+			if cleaned != "" && (!s.searchEnabled || !sse.IsCitation(cleaned)) {
+				s.emitTextDelta(cleaned)
+			}
 		}
 		if len(evt.ToolCallDeltas) > 0 {
 			if !s.emitEarlyToolDeltas {

internal/httpapi/openai/responses/responses_stream_runtime_toolcalls_finalize.go

@@ -145,7 +145,7 @@ func (s *responsesStreamRuntime) buildCompletedResponseObject(finalThinking, fin
 		}
 	}
 
-	return openaifmt.BuildResponseObjectFromItems(
+	obj := openaifmt.BuildResponseObjectFromItems(
 		s.responseID,
 		s.model,
 		s.finalPrompt,
@@ -154,4 +154,8 @@ func (s *responsesStreamRuntime) buildCompletedResponseObject(finalThinking, fin
 		output,
 		outputText,
 	)
+	if s.refFileTokens > 0 {
+		addRefFileTokensToUsage(obj, s.refFileTokens)
+	}
+	return obj
 }

internal/httpapi/openai/responses/responses_stream_test.go

@@ -27,7 +27,7 @@ func TestHandleResponsesStreamDoesNotEmitReasoningTextCompatEvents(t *testing.T)
 		Body:       io.NopCloser(strings.NewReader(streamBody)),
 	}
 
-	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_test", "deepseek-v4-pro", "prompt", true, false, nil, nil, promptcompat.DefaultToolChoicePolicy(), "")
+	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_test", "deepseek-v4-pro", "prompt", 0, true, false, nil, nil, promptcompat.DefaultToolChoicePolicy(), "")
 
 	body := rec.Body.String()
 	if !strings.Contains(body, "event: response.reasoning.delta") {
@@ -57,7 +57,7 @@ func TestHandleResponsesStreamEmitsOutputTextDoneBeforeContentPartDone(t *testin
 		Body:       io.NopCloser(strings.NewReader(streamBody)),
 	}
 
-	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_test", "deepseek-v4-flash", "prompt", false, false, nil, nil, promptcompat.DefaultToolChoicePolicy(), "")
+	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_test", "deepseek-v4-flash", "prompt", 0, false, false, nil, nil, promptcompat.DefaultToolChoicePolicy(), "")
 	body := rec.Body.String()
 	if !strings.Contains(body, "event: response.output_text.done") {
 		t.Fatalf("expected response.output_text.done payload, body=%s", body)
@@ -91,7 +91,7 @@ func TestHandleResponsesStreamOutputTextDeltaCarriesItemIndexes(t *testing.T) {
 		Body:       io.NopCloser(strings.NewReader(streamBody)),
 	}
 
-	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_test", "deepseek-v4-flash", "prompt", false, false, nil, nil, promptcompat.DefaultToolChoicePolicy(), "")
+	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_test", "deepseek-v4-flash", "prompt", 0, false, false, nil, nil, promptcompat.DefaultToolChoicePolicy(), "")
 	body := rec.Body.String()
 
 	deltaPayload, ok := extractSSEEventPayload(body, "response.output_text.delta")
@@ -109,6 +109,48 @@ func TestHandleResponsesStreamOutputTextDeltaCarriesItemIndexes(t *testing.T) {
 	}
 }
 
+func TestHandleResponsesStreamCoalescesSmallOutputTextDeltas(t *testing.T) {
+	h := &Handler{}
+	req := httptest.NewRequest(http.MethodPost, "/v1/responses", nil)
+	rec := httptest.NewRecorder()
+
+	var streamBody strings.Builder
+	for i := 0; i < 100; i++ {
+		b, _ := json.Marshal(map[string]any{
+			"p": "response/content",
+			"v": "字",
+		})
+		streamBody.WriteString("data: ")
+		streamBody.WriteString(string(b))
+		streamBody.WriteString("\n")
+	}
+	streamBody.WriteString("data: [DONE]\n")
+	resp := &http.Response{
+		StatusCode: http.StatusOK,
+		Body:       io.NopCloser(strings.NewReader(streamBody.String())),
+	}
+
+	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_coalesce", "deepseek-v4-flash", "prompt", 0, false, false, nil, nil, promptcompat.DefaultToolChoicePolicy(), "")
+
+	payloads := extractSSEEventPayloads(rec.Body.String(), "response.output_text.delta")
+	if len(payloads) == 0 {
+		t.Fatalf("expected response.output_text.delta payloads, body=%s", rec.Body.String())
+	}
+	var content strings.Builder
+	for _, payload := range payloads {
+		content.WriteString(asString(payload["delta"]))
+	}
+	if got, want := content.String(), strings.Repeat("字", 100); got != want {
+		t.Fatalf("coalesced response content mismatch: got %q want %q body=%s", got, want, rec.Body.String())
+	}
+	if len(payloads) >= 100 {
+		t.Fatalf("expected coalescing to reduce 100 tiny text deltas, got %d body=%s", len(payloads), rec.Body.String())
+	}
+	if !strings.Contains(rec.Body.String(), "event: response.completed") {
+		t.Fatalf("expected completed event, body=%s", rec.Body.String())
+	}
+}
+
 func TestHandleResponsesStreamEmitsDistinctToolCallIDsAcrossSeparateToolBlocks(t *testing.T) {
 	h := &Handler{}
 	req := httptest.NewRequest(http.MethodPost, "/v1/responses", nil)
@@ -130,7 +172,7 @@ func TestHandleResponsesStreamEmitsDistinctToolCallIDsAcrossSeparateToolBlocks(t
 		Body:       io.NopCloser(strings.NewReader(streamBody)),
 	}
 
-	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_test", "deepseek-v4-flash", "prompt", false, false, []string{"read_file", "search"}, nil, promptcompat.DefaultToolChoicePolicy(), "")
+	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_test", "deepseek-v4-flash", "prompt", 0, false, false, []string{"read_file", "search"}, nil, promptcompat.DefaultToolChoicePolicy(), "")
 
 	body := rec.Body.String()
 	doneEvents := extractSSEEventPayloads(body, "response.function_call_arguments.done")
@@ -183,7 +225,7 @@ func TestHandleResponsesStreamRequiredToolChoiceFailure(t *testing.T) {
 		Mode:    promptcompat.ToolChoiceRequired,
 		Allowed: map[string]struct{}{"read_file": {}},
 	}
-	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_test", "deepseek-v4-flash", "prompt", false, false, []string{"read_file"}, nil, policy, "")
+	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_test", "deepseek-v4-flash", "prompt", 0, false, false, []string{"read_file"}, nil, policy, "")
 
 	body := rec.Body.String()
 	if !strings.Contains(body, "event: response.failed") {
@@ -213,7 +255,7 @@ func TestHandleResponsesStreamFailsWhenUpstreamHasOnlyThinking(t *testing.T) {
 		Body:       io.NopCloser(strings.NewReader(streamBody)),
 	}
 
-	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_test", "deepseek-v4-pro", "prompt", true, false, nil, nil, promptcompat.DefaultToolChoicePolicy(), "")
+	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_test", "deepseek-v4-pro", "prompt", 0, true, false, nil, nil, promptcompat.DefaultToolChoicePolicy(), "")
 
 	body := rec.Body.String()
 	if !strings.Contains(body, "event: response.failed") {
@@ -251,11 +293,11 @@ func TestHandleResponsesStreamPromotesThinkingToolCallsOnFinalizeWithoutMidstrea
 		Body:       io.NopCloser(strings.NewReader(streamBody)),
 	}
 
-	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_test", "deepseek-v4-pro", "prompt", true, false, []string{"read_file"}, nil, promptcompat.DefaultToolChoicePolicy(), "")
+	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_test", "deepseek-v4-pro", "prompt", 0, true, false, []string{"read_file"}, nil, promptcompat.DefaultToolChoicePolicy(), "")
 
 	body := rec.Body.String()
-	if !strings.Contains(body, "event: response.reasoning.delta") {
-		t.Fatalf("expected reasoning delta in stream body, got %s", body)
+	if strings.Contains(body, "event: response.reasoning.delta") {
+		t.Fatalf("did not expect leaked reasoning delta in stream body, got %s", body)
 	}
 	if !strings.Contains(body, "event: response.function_call_arguments.done") {
 		t.Fatalf("expected finalize fallback function call event, got %s", body)
@@ -288,7 +330,7 @@ func TestHandleResponsesStreamPromotesHiddenThinkingDSMLToolCallsOnFinalize(t *t
 		Mode:    promptcompat.ToolChoiceRequired,
 		Allowed: map[string]struct{}{"read_file": {}},
 	}
-	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_hidden", "deepseek-v4-pro", "prompt", false, false, []string{"read_file"}, nil, policy, "")
+	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_hidden", "deepseek-v4-pro", "prompt", 0, false, false, []string{"read_file"}, nil, policy, "")
 
 	body := rec.Body.String()
 	if strings.Contains(body, "event: response.reasoning.delta") {
@@ -317,7 +359,7 @@ func TestHandleResponsesNonStreamRequiredToolChoiceViolation(t *testing.T) {
 		Allowed: map[string]struct{}{"read_file": {}},
 	}
 
-	h.handleResponsesNonStream(rec, resp, "owner-a", "resp_test", "deepseek-v4-flash", "prompt", false, false, []string{"read_file"}, nil, policy, "")
+	h.handleResponsesNonStream(rec, resp, "owner-a", "resp_test", "deepseek-v4-flash", "prompt", 0, false, false, []string{"read_file"}, nil, policy, "")
 	if rec.Code != http.StatusUnprocessableEntity {
 		t.Fatalf("expected 422 for required tool_choice violation, got %d body=%s", rec.Code, rec.Body.String())
 	}
@@ -344,7 +386,7 @@ func TestHandleResponsesNonStreamRequiredToolChoiceIgnoresThinkingToolPayloadWhe
 		Allowed: map[string]struct{}{"read_file": {}},
 	}
 
-	h.handleResponsesNonStream(rec, resp, "owner-a", "resp_test", "deepseek-v4-flash", "prompt", true, false, []string{"read_file"}, nil, policy, "")
+	h.handleResponsesNonStream(rec, resp, "owner-a", "resp_test", "deepseek-v4-flash", "prompt", 0, true, false, []string{"read_file"}, nil, policy, "")
 	if rec.Code != http.StatusUnprocessableEntity {
 		t.Fatalf("expected 422 for required tool_choice violation, got %d body=%s", rec.Code, rec.Body.String())
 	}
@@ -366,7 +408,7 @@ func TestHandleResponsesNonStreamReturns429WhenUpstreamOutputEmpty(t *testing.T)
 		)),
 	}
 
-	h.handleResponsesNonStream(rec, resp, "owner-a", "resp_test", "deepseek-v4-flash", "prompt", false, false, nil, nil, promptcompat.DefaultToolChoicePolicy(), "")
+	h.handleResponsesNonStream(rec, resp, "owner-a", "resp_test", "deepseek-v4-flash", "prompt", 0, false, false, nil, nil, promptcompat.DefaultToolChoicePolicy(), "")
 	if rec.Code != http.StatusTooManyRequests {
 		t.Fatalf("expected 429 for empty upstream output, got %d body=%s", rec.Code, rec.Body.String())
 	}
@@ -388,7 +430,7 @@ func TestHandleResponsesNonStreamReturnsContentFilterErrorWhenUpstreamFilteredWi
 		)),
 	}
 
-	h.handleResponsesNonStream(rec, resp, "owner-a", "resp_test", "deepseek-v4-flash", "prompt", false, false, nil, nil, promptcompat.DefaultToolChoicePolicy(), "")
+	h.handleResponsesNonStream(rec, resp, "owner-a", "resp_test", "deepseek-v4-flash", "prompt", 0, false, false, nil, nil, promptcompat.DefaultToolChoicePolicy(), "")
 	if rec.Code != http.StatusBadRequest {
 		t.Fatalf("expected 400 for filtered empty upstream output, got %d body=%s", rec.Code, rec.Body.String())
 	}
@@ -410,7 +452,7 @@ func TestHandleResponsesNonStreamReturns429WhenUpstreamHasOnlyThinking(t *testin
 		)),
 	}
 
-	h.handleResponsesNonStream(rec, resp, "owner-a", "resp_test", "deepseek-v4-pro", "prompt", true, false, nil, nil, promptcompat.DefaultToolChoicePolicy(), "")
+	h.handleResponsesNonStream(rec, resp, "owner-a", "resp_test", "deepseek-v4-pro", "prompt", 0, true, false, nil, nil, promptcompat.DefaultToolChoicePolicy(), "")
 	if rec.Code != http.StatusTooManyRequests {
 		t.Fatalf("expected 429 for thinking-only upstream output, got %d body=%s", rec.Code, rec.Body.String())
 	}
@@ -432,7 +474,7 @@ func TestHandleResponsesNonStreamPromotesThinkingToolCallsWhenTextEmpty(t *testi
 		)),
 	}
 
-	h.handleResponsesNonStream(rec, resp, "owner-a", "resp_test", "deepseek-v4-pro", "prompt", true, false, []string{"read_file"}, nil, promptcompat.DefaultToolChoicePolicy(), "")
+	h.handleResponsesNonStream(rec, resp, "owner-a", "resp_test", "deepseek-v4-pro", "prompt", 0, true, false, []string{"read_file"}, nil, promptcompat.DefaultToolChoicePolicy(), "")
 	if rec.Code != http.StatusOK {
 		t.Fatalf("expected 200 for thinking tool calls, got %d body=%s", rec.Code, rec.Body.String())
 	}
@@ -462,7 +504,7 @@ func TestHandleResponsesNonStreamPromotesHiddenThinkingDSMLToolCallsWhenTextEmpt
 		Mode:    promptcompat.ToolChoiceRequired,
 		Allowed: map[string]struct{}{"read_file": {}},
 	}
-	h.handleResponsesNonStream(rec, resp, "owner-a", "resp_hidden", "deepseek-v4-pro", "prompt", false, false, []string{"read_file"}, nil, policy, "")
+	h.handleResponsesNonStream(rec, resp, "owner-a", "resp_hidden", "deepseek-v4-pro", "prompt", 0, false, false, []string{"read_file"}, nil, policy, "")
 	if rec.Code != http.StatusOK {
 		t.Fatalf("expected 200 for hidden thinking tool calls, got %d body=%s", rec.Code, rec.Body.String())
 	}
@@ -509,7 +551,7 @@ func TestHandleResponsesStreamCoercesSchemaDeclaredStringArguments(t *testing.T)
 		Body:       io.NopCloser(strings.NewReader(streamBody)),
 	}
 
-	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_string_protect", "deepseek-v4-flash", "prompt", false, false, []string{"Write"}, toolsRaw, promptcompat.DefaultToolChoicePolicy(), "")
+	h.handleResponsesStream(rec, req, resp, "owner-a", "resp_string_protect", "deepseek-v4-flash", "prompt", 0, false, false, []string{"Write"}, toolsRaw, promptcompat.DefaultToolChoicePolicy(), "")
 
 	payload, ok := extractSSEEventPayload(rec.Body.String(), "response.function_call_arguments.done")
 	if !ok {

internal/httpapi/openai/shared/assistant_toolcalls.go

@@ -6,12 +6,12 @@ import (
 	"ds2api/internal/toolcall"
 )
 
-func DetectAssistantToolCalls(text, exposedThinking, detectionThinking string, toolNames []string) toolcall.ToolCallParseResult {
-	textParsed := toolcall.ParseStandaloneToolCallsDetailed(text, toolNames)
+func DetectAssistantToolCalls(rawText, visibleText, exposedThinking, detectionThinking string, toolNames []string) toolcall.ToolCallParseResult {
+	textParsed := toolcall.ParseStandaloneToolCallsDetailed(rawText, toolNames)
 	if len(textParsed.Calls) > 0 {
 		return textParsed
 	}
-	if strings.TrimSpace(text) != "" {
+	if strings.TrimSpace(visibleText) != "" {
 		return textParsed
 	}
 	thinking := detectionThinking

internal/httpapi/openai/shared/citation_links.go

@@ -13,7 +13,7 @@ func ReplaceCitationMarkersWithLinks(text string, links map[int]string) string {
 	if strings.TrimSpace(text) == "" || len(links) == 0 {
 		return text
 	}
-	zeroBased := strings.Contains(strings.ToLower(text), "[reference:0]")
+	zeroBasedReference := hasZeroBasedReferenceMarker(text)
 	return citationMarkerPattern.ReplaceAllStringFunc(text, func(match string) string {
 		sub := citationMarkerPattern.FindStringSubmatch(match)
 		if len(sub) < 3 {
@@ -24,7 +24,7 @@ func ReplaceCitationMarkersWithLinks(text string, links map[int]string) string {
 			return match
 		}
 		lookupIdx := idx
-		if zeroBased {
+		if strings.EqualFold(sub[1], "reference") && zeroBasedReference {
 			lookupIdx = idx + 1
 		}
 		url := strings.TrimSpace(links[lookupIdx])
@@ -34,3 +34,16 @@ func ReplaceCitationMarkersWithLinks(text string, links map[int]string) string {
 		return fmt.Sprintf("[%d](%s)", idx, url)
 	})
 }
+
+func hasZeroBasedReferenceMarker(text string) bool {
+	for _, sub := range citationMarkerPattern.FindAllStringSubmatch(text, -1) {
+		if len(sub) < 3 || !strings.EqualFold(sub[1], "reference") {
+			continue
+		}
+		idx, err := strconv.Atoi(strings.TrimSpace(sub[2]))
+		if err == nil && idx == 0 {
+			return true
+		}
+	}
+	return false
+}

internal/httpapi/openai/shared/leaked_output_sanitize.go

@@ -3,6 +3,8 @@ package shared
 import (
 	"regexp"
 	"strings"
+
+	"ds2api/internal/toolcall"
 )
 
 var emptyJSONFencePattern = regexp.MustCompile("(?is)```json\\s*```")
@@ -47,10 +49,42 @@ func sanitizeLeakedOutput(text string) string {
 	out = leakedThinkTagPattern.ReplaceAllString(out, "")
 	out = leakedBOSMarkerPattern.ReplaceAllString(out, "")
 	out = leakedMetaMarkerPattern.ReplaceAllString(out, "")
+	out = stripLeakedToolCallWrapperBlocks(out)
 	out = sanitizeLeakedAgentXMLBlocks(out)
 	return out
 }
 
+func stripLeakedToolCallWrapperBlocks(text string) string {
+	if text == "" {
+		return text
+	}
+	var b strings.Builder
+	pos := 0
+	for pos < len(text) {
+		tag, ok := toolcall.FindToolMarkupTagOutsideIgnored(text, pos)
+		if !ok {
+			b.WriteString(text[pos:])
+			break
+		}
+		if tag.Start > pos {
+			b.WriteString(text[pos:tag.Start])
+		}
+		if tag.Closing || tag.Name != "tool_calls" {
+			b.WriteString(text[tag.Start : tag.End+1])
+			pos = tag.End + 1
+			continue
+		}
+		closeTag, ok := toolcall.FindMatchingToolMarkupClose(text, tag)
+		if !ok {
+			b.WriteString(text[tag.Start : tag.End+1])
+			pos = tag.End + 1
+			continue
+		}
+		pos = closeTag.End + 1
+	}
+	return b.String()
+}
+
 func stripDanglingThinkSuffix(text string) string {
 	matches := leakedThinkTagPattern.FindAllStringIndex(text, -1)
 	if len(matches) == 0 {

internal/httpapi/requestbody/json_utf8.go

@@ -0,0 +1,134 @@
+package requestbody
+
+import (
+	"bytes"
+	"errors"
+	"io"
+	"mime"
+	"net/http"
+	"strings"
+	"unicode/utf8"
+)
+
+var (
+	ErrInvalidUTF8Body     = errors.New("invalid utf-8 request body")
+	errRequestBodyTooLarge = errors.New("request body too large")
+)
+
+const maxJSONUTF8ValidationSize = 100 << 20
+
+// ValidateJSONUTF8 validates complete JSON request bodies before downstream
+// decoders can silently replace malformed UTF-8 or stop before trailing bytes.
+func ValidateJSONUTF8(next http.Handler) http.Handler {
+	if next == nil {
+		return http.HandlerFunc(func(http.ResponseWriter, *http.Request) {})
+	}
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if shouldValidateJSONBody(r) {
+			r.Body = validateAndReplayBody(r.Body)
+		}
+		next.ServeHTTP(w, r)
+	})
+}
+
+func shouldValidateJSONBody(r *http.Request) bool {
+	if r == nil || r.Body == nil {
+		return false
+	}
+	path := ""
+	if r.URL != nil {
+		path = r.URL.Path
+	}
+	return isJSONContentType(r.Header.Get("Content-Type")) || isKnownJSONRequestPath(r.Method, path)
+}
+
+func isJSONContentType(raw string) bool {
+	raw = strings.TrimSpace(raw)
+	if raw == "" {
+		return false
+	}
+	mediaType, _, err := mime.ParseMediaType(raw)
+	if err != nil {
+		mediaType = raw
+	}
+	mediaType = strings.ToLower(strings.TrimSpace(mediaType))
+	return strings.Contains(mediaType, "json")
+}
+
+func isKnownJSONRequestPath(method, path string) bool {
+	switch strings.ToUpper(strings.TrimSpace(method)) {
+	case http.MethodPost, http.MethodPut, http.MethodPatch, http.MethodDelete:
+	default:
+		return false
+	}
+	path = strings.TrimSpace(path)
+	if path == "" {
+		return false
+	}
+	switch {
+	case path == "/v1/chat/completions" || path == "/chat/completions":
+		return true
+	case path == "/v1/responses" || path == "/responses":
+		return true
+	case path == "/v1/embeddings" || path == "/embeddings":
+		return true
+	case path == "/anthropic/v1/messages" || path == "/v1/messages" || path == "/messages":
+		return true
+	case path == "/anthropic/v1/messages/count_tokens" || path == "/v1/messages/count_tokens" || path == "/messages/count_tokens":
+		return true
+	case strings.HasPrefix(path, "/v1beta/models/") || strings.HasPrefix(path, "/v1/models/"):
+		return strings.Contains(path, ":generateContent") || strings.Contains(path, ":streamGenerateContent")
+	case strings.HasPrefix(path, "/admin/"):
+		return true
+	default:
+		return false
+	}
+}
+
+func validateAndReplayBody(body io.ReadCloser) io.ReadCloser {
+	if body == nil {
+		return body
+	}
+	raw, err := io.ReadAll(io.LimitReader(body, maxJSONUTF8ValidationSize+1))
+	if err != nil {
+		return &errorReadCloser{err: err, closer: body}
+	}
+	if len(raw) > maxJSONUTF8ValidationSize {
+		return &errorReadCloser{err: errRequestBodyTooLarge, closer: body}
+	}
+	if !utf8.Valid(raw) {
+		return &errorReadCloser{err: ErrInvalidUTF8Body, closer: body}
+	}
+	return &replayReadCloser{Reader: bytes.NewReader(raw), closer: body}
+}
+
+type replayReadCloser struct {
+	*bytes.Reader
+	closer io.Closer
+}
+
+func (r *replayReadCloser) Close() error {
+	if r == nil || r.closer == nil {
+		return nil
+	}
+	return r.closer.Close()
+}
+
+type errorReadCloser struct {
+	err    error
+	closer io.Closer
+}
+
+func (r *errorReadCloser) Read([]byte) (int, error) {
+	if r == nil || r.err == nil {
+		return 0, io.EOF
+	}
+	return 0, r.err
+}
+
+func (r *errorReadCloser) Close() error {
+	if r == nil || r.closer == nil {
+		return nil
+	}
+	return r.closer.Close()
+}

internal/httpapi/requestbody/json_utf8_test.go

@@ -0,0 +1,158 @@
+package requestbody
+
+import (
+	"bytes"
+	"encoding/json"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+type singleByteReadCloser struct {
+	data []byte
+	pos  int
+}
+
+func (r *singleByteReadCloser) Read(p []byte) (int, error) {
+	if r.pos >= len(r.data) {
+		return 0, io.EOF
+	}
+	p[0] = r.data[r.pos]
+	r.pos++
+	return 1, nil
+}
+
+func (r *singleByteReadCloser) Close() error {
+	return nil
+}
+
+func TestValidateJSONUTF8AllowsSplitMultibyteRunes(t *testing.T) {
+	body := []byte(`{"text":"你好"}`)
+	handler := ValidateJSONUTF8(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		var req map[string]any
+		if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+			t.Fatalf("unexpected decode error: %v", err)
+		}
+		w.WriteHeader(http.StatusNoContent)
+	}))
+
+	req := httptest.NewRequest(http.MethodPost, "/v1/chat/completions", &singleByteReadCloser{data: body})
+	req.Header.Set("Content-Type", "application/json")
+	rec := httptest.NewRecorder()
+
+	handler.ServeHTTP(rec, req)
+
+	if rec.Code != http.StatusNoContent {
+		t.Fatalf("expected 204 for valid utf-8 json, got %d body=%q", rec.Code, rec.Body.String())
+	}
+}
+
+func TestValidateJSONUTF8RejectsInvalidBytesBeforeJSONDecode(t *testing.T) {
+	body := append([]byte(`{"text":"`), 0xff)
+	body = append(body, []byte(`"}`)...)
+	handler := ValidateJSONUTF8(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		var req map[string]any
+		if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+			w.WriteHeader(http.StatusBadRequest)
+			_, _ = w.Write([]byte(err.Error()))
+			return
+		}
+		w.WriteHeader(http.StatusOK)
+	}))
+
+	req := httptest.NewRequest(http.MethodPost, "/v1/chat/completions", bytes.NewReader(body))
+	req.Header.Set("Content-Type", "application/json; charset=utf-8")
+	rec := httptest.NewRecorder()
+
+	handler.ServeHTTP(rec, req)
+
+	if rec.Code != http.StatusBadRequest {
+		t.Fatalf("expected 400 for invalid utf-8 json, got %d body=%q", rec.Code, rec.Body.String())
+	}
+	if !strings.Contains(strings.ToLower(rec.Body.String()), "invalid utf-8") {
+		t.Fatalf("expected utf-8 validation error, got %q", rec.Body.String())
+	}
+}
+
+func TestValidateJSONUTF8RejectsInvalidBytesWithoutJSONContentTypeOnKnownPath(t *testing.T) {
+	body := append([]byte(`{"text":"`), 0xff)
+	body = append(body, []byte(`"}`)...)
+	handler := ValidateJSONUTF8(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		var req map[string]any
+		if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+			w.WriteHeader(http.StatusBadRequest)
+			_, _ = w.Write([]byte(err.Error()))
+			return
+		}
+		w.WriteHeader(http.StatusOK)
+	}))
+
+	req := httptest.NewRequest(http.MethodPost, "/v1/chat/completions", bytes.NewReader(body))
+	req.Header.Set("Content-Type", "text/plain")
+	rec := httptest.NewRecorder()
+
+	handler.ServeHTTP(rec, req)
+
+	if rec.Code != http.StatusBadRequest {
+		t.Fatalf("expected 400 for invalid utf-8 json, got %d body=%q", rec.Code, rec.Body.String())
+	}
+	if !strings.Contains(strings.ToLower(rec.Body.String()), "invalid utf-8") {
+		t.Fatalf("expected utf-8 validation error, got %q", rec.Body.String())
+	}
+}
+
+func TestValidateJSONUTF8RejectsTrailingInvalidBytesAfterJSONValue(t *testing.T) {
+	body := append([]byte(`{"text":"ok"}`), 0xff)
+	handler := ValidateJSONUTF8(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		var req map[string]any
+		if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+			w.WriteHeader(http.StatusBadRequest)
+			_, _ = w.Write([]byte(err.Error()))
+			return
+		}
+		w.WriteHeader(http.StatusOK)
+	}))
+
+	req := httptest.NewRequest(http.MethodPost, "/v1/chat/completions", bytes.NewReader(body))
+	req.Header.Set("Content-Type", "application/json")
+	rec := httptest.NewRecorder()
+
+	handler.ServeHTTP(rec, req)
+
+	if rec.Code != http.StatusBadRequest {
+		t.Fatalf("expected 400 for trailing invalid utf-8, got %d body=%q", rec.Code, rec.Body.String())
+	}
+	if !strings.Contains(strings.ToLower(rec.Body.String()), "invalid utf-8") {
+		t.Fatalf("expected utf-8 validation error, got %q", rec.Body.String())
+	}
+}
+
+func TestIsJSONContentType(t *testing.T) {
+	for _, raw := range []string{
+		"application/json",
+		"application/json; charset=utf-8",
+		"application/problem+json",
+		"application/vnd.api+json",
+	} {
+		if !isJSONContentType(raw) {
+			t.Fatalf("expected %q to be recognized as json", raw)
+		}
+	}
+	for _, raw := range []string{
+		"multipart/form-data; boundary=abc",
+		"text/plain",
+		"application/octet-stream",
+	} {
+		if isJSONContentType(raw) {
+			t.Fatalf("expected %q not to be recognized as json", raw)
+		}
+	}
+}
+
+func TestIsKnownJSONRequestPathIncludesGeminiStream(t *testing.T) {
+	if !isKnownJSONRequestPath(http.MethodPost, "/v1beta/models/gemini-pro:streamGenerateContent") {
+		t.Fatal("expected Gemini stream generate path to be recognized as json")
+	}
+}

internal/js/chat-stream/sse_parse_impl.js

@@ -70,7 +70,6 @@ function finalizeThinkingParts(parts, thinkingEnabled, newType) {
   }
   if (!thinkingEnabled) {
     finalParts = dropThinkingParts(finalParts);
-    finalType = 'text';
   }
   return { parts: finalParts, newType: finalType };
 }
@@ -213,6 +212,12 @@ function parseChunkForContent(chunk, thinkingEnabled, currentType, stripReferenc
     }
   }
 
+  if (pathValue === 'response/content') {
+    newType = 'text';
+  } else if (pathValue === 'response/thinking_content' && (!thinkingEnabled || newType !== 'text')) {
+    newType = 'thinking';
+  }
+
   let partType = 'text';
   if (pathValue === 'response/thinking_content') {
     if (!thinkingEnabled) {
@@ -226,8 +231,8 @@ function parseChunkForContent(chunk, thinkingEnabled, currentType, stripReferenc
     partType = 'text';
   } else if (pathValue.includes('response/fragments') && pathValue.includes('/content')) {
     partType = newType;
-  } else if (!pathValue && thinkingEnabled) {
-    partType = newType;
+  } else if (!pathValue) {
+    partType = newType || 'text';
   }
 
   const val = chunk.v;
@@ -308,6 +313,10 @@ function parseChunkForContent(chunk, thinkingEnabled, currentType, stripReferenc
   }
 
   if (val && typeof val === 'object') {
+    const directContent = asContentString(val, stripReferenceMarkers);
+    if (directContent) {
+      parts.push({ text: directContent, type: partType });
+    }
     const resp = val.response && typeof val.response === 'object' ? val.response : val;
     if (Array.isArray(resp.fragments)) {
       for (const frag of resp.fragments) {
@@ -593,6 +602,12 @@ function asContentString(v, stripReferenceMarkers = true) {
     if (Object.prototype.hasOwnProperty.call(v, 'v')) {
       return asContentString(v.v, stripReferenceMarkers);
     }
+    if (Object.prototype.hasOwnProperty.call(v, 'text')) {
+      return asContentString(v.text, stripReferenceMarkers);
+    }
+    if (Object.prototype.hasOwnProperty.call(v, 'value')) {
+      return asContentString(v.value, stripReferenceMarkers);
+    }
     return '';
   }
   if (v == null) {

internal/js/chat-stream/stream_emitter.js

@@ -1,5 +1,8 @@
 'use strict';
 
+const MIN_DELTA_FLUSH_CHARS = 160;
+const MAX_DELTA_FLUSH_WAIT_MS = 80;
+
 function createChatCompletionEmitter({ res, sessionID, created, model, isClosed }) {
   let firstChunkSent = false;
 
@@ -34,6 +37,62 @@ function createChatCompletionEmitter({ res, sessionID, created, model, isClosed
   };
 }
 
+function createDeltaCoalescer({ sendDeltaFrame, minFlushChars = MIN_DELTA_FLUSH_CHARS, maxFlushWaitMS = MAX_DELTA_FLUSH_WAIT_MS }) {
+  let pendingField = '';
+  let pendingText = '';
+  let flushTimer = null;
+
+  const clearFlushTimer = () => {
+    if (flushTimer) {
+      clearTimeout(flushTimer);
+      flushTimer = null;
+    }
+  };
+
+  const flush = () => {
+    clearFlushTimer();
+    if (!pendingField || !pendingText) {
+      return;
+    }
+    const delta = { [pendingField]: pendingText };
+    pendingField = '';
+    pendingText = '';
+    sendDeltaFrame(delta);
+  };
+
+  const scheduleFlush = () => {
+    if (flushTimer || maxFlushWaitMS <= 0) {
+      return;
+    }
+    flushTimer = setTimeout(flush, maxFlushWaitMS);
+    if (typeof flushTimer.unref === 'function') {
+      flushTimer.unref();
+    }
+  };
+
+  const append = (field, text) => {
+    if (!field || !text) {
+      return;
+    }
+    if (pendingField && pendingField !== field) {
+      flush();
+    }
+    pendingField = field;
+    pendingText += text;
+    if ([...pendingText].length >= minFlushChars) {
+      flush();
+      return;
+    }
+    scheduleFlush();
+  };
+
+  return {
+    append,
+    flush,
+  };
+}
+
 module.exports = {
   createChatCompletionEmitter,
+  createDeltaCoalescer,
 };

internal/js/chat-stream/vercel_stream_impl.js

@@ -20,7 +20,7 @@ const {
   boolDefaultTrue,
   resetStreamToolCallState,
 } = require('./toolcall_policy');
-const { createChatCompletionEmitter } = require('./stream_emitter');
+const { createChatCompletionEmitter, createDeltaCoalescer } = require('./stream_emitter');
 const {
   asString,
   isAbortError,
@@ -191,6 +191,7 @@ async function handleVercelStream(req, res, rawBody, payload) {
       model,
       isClosed: () => clientClosed,
     });
+    const deltaCoalescer = createDeltaCoalescer({ sendDeltaFrame });
 
     const finish = async (reason, options = {}) => {
       if (ended) {
@@ -201,25 +202,28 @@ async function handleVercelStream(req, res, rawBody, payload) {
         await releaseLease();
         return true;
       }
+      deltaCoalescer.flush();
       const detected = parseStandaloneToolCalls(outputText, toolNames);
       if (detected.length > 0 && !toolCallsDoneEmitted) {
         toolCallsEmitted = true;
         toolCallsDoneEmitted = true;
-        sendDeltaFrame({ tool_calls: formatOpenAIStreamToolCalls(detected, streamToolCallIDs) });
+        sendDeltaFrame({ tool_calls: formatOpenAIStreamToolCalls(detected, streamToolCallIDs, payload.tools) });
       } else if (toolSieveEnabled) {
         const tailEvents = flushToolSieve(toolSieveState, toolNames);
         for (const evt of tailEvents) {
           if (evt.type === 'tool_calls' && Array.isArray(evt.calls) && evt.calls.length > 0) {
+            deltaCoalescer.flush();
             toolCallsEmitted = true;
             toolCallsDoneEmitted = true;
-            sendDeltaFrame({ tool_calls: formatOpenAIStreamToolCalls(evt.calls, streamToolCallIDs) });
+            sendDeltaFrame({ tool_calls: formatOpenAIStreamToolCalls(evt.calls, streamToolCallIDs, payload.tools) });
             resetStreamToolCallState(streamToolCallIDs, streamToolNames);
             continue;
           }
           if (evt.text) {
-            sendDeltaFrame({ content: evt.text });
+            deltaCoalescer.append('content', evt.text);
           }
         }
+        deltaCoalescer.flush();
       }
       if (detected.length > 0 || toolCallsEmitted) {
         reason = 'tool_calls';
@@ -327,7 +331,7 @@ async function handleVercelStream(req, res, rawBody, payload) {
                       continue;
                     }
                     thinkingText += trimmed;
-                    sendDeltaFrame({ reasoning_content: trimmed });
+                    deltaCoalescer.append('reasoning_content', trimmed);
                   }
                 } else {
                   const trimmed = trimContinuationOverlap(outputText, p.text);
@@ -339,7 +343,7 @@ async function handleVercelStream(req, res, rawBody, payload) {
                   }
                   outputText += trimmed;
                   if (!toolSieveEnabled) {
-                    sendDeltaFrame({ content: trimmed });
+                    deltaCoalescer.append('content', trimmed);
                     continue;
                   }
                   const events = processToolSieveChunk(toolSieveState, trimmed, toolNames);
@@ -352,6 +356,7 @@ async function handleVercelStream(req, res, rawBody, payload) {
                       const formatted = formatIncrementalToolCallDeltas(filtered, streamToolCallIDs);
                       if (formatted.length > 0) {
                         toolCallsEmitted = true;
+                        deltaCoalescer.flush();
                         sendDeltaFrame({ tool_calls: formatted });
                       }
                       continue;
@@ -359,12 +364,13 @@ async function handleVercelStream(req, res, rawBody, payload) {
                     if (evt.type === 'tool_calls') {
                       toolCallsEmitted = true;
                       toolCallsDoneEmitted = true;
-                      sendDeltaFrame({ tool_calls: formatOpenAIStreamToolCalls(evt.calls, streamToolCallIDs) });
+                      deltaCoalescer.flush();
+                      sendDeltaFrame({ tool_calls: formatOpenAIStreamToolCalls(evt.calls, streamToolCallIDs, payload.tools) });
                       resetStreamToolCallState(streamToolCallIDs, streamToolNames);
                       continue;
                     }
                     if (evt.text) {
-                      sendDeltaFrame({ content: evt.text });
+                      deltaCoalescer.append('content', evt.text);
                     }
                   }
                 }
@@ -510,27 +516,87 @@ function observeContinueState(state, chunk) {
   if (topID > 0) {
     state.responseMessageID = topID;
   }
-  if (chunk.p === 'response/status') {
-    setContinueStatus(state, asString(chunk.v));
+  observeContinueDirectPatch(state, chunk.p, chunk.v);
+  if (chunk.p === 'response') {
+    observeContinueBatchPatches(state, 'response', chunk.v);
+  } else {
+    observeContinueBatchPatches(state, '', chunk.v);
   }
   const response = chunk.v && typeof chunk.v === 'object' ? chunk.v.response : null;
-  if (response && typeof response === 'object') {
-    const id = numberValue(response.message_id);
-    if (id > 0) {
-      state.responseMessageID = id;
-    }
-    setContinueStatus(state, asString(response.status));
-    if (response.auto_continue === true) {
-      state.lastStatus = 'AUTO_CONTINUE';
-    }
-  }
+  observeContinueResponseObject(state, response);
   const messageResponse = chunk.message && typeof chunk.message === 'object' && chunk.message.response;
-  if (messageResponse && typeof messageResponse === 'object') {
-    const id = numberValue(messageResponse.message_id);
-    if (id > 0) {
-      state.responseMessageID = id;
+  observeContinueResponseObject(state, messageResponse);
+}
+
+function observeContinueDirectPatch(state, path, value) {
+  if (!state) {
+    return;
+  }
+  switch (asString(path).trim().replace(/^\/+|\/+$/g, '')) {
+    case 'response/status':
+    case 'status':
+    case 'response/quasi_status':
+    case 'quasi_status':
+      setContinueStatus(state, asString(value));
+      break;
+    case 'response/auto_continue':
+    case 'auto_continue':
+      if (value === true) {
+        state.lastStatus = 'AUTO_CONTINUE';
+      }
+      break;
+    default:
+      break;
+  }
+}
+
+function observeContinueResponseObject(state, response) {
+  if (!state || !response || typeof response !== 'object') {
+    return;
+  }
+  const id = numberValue(response.message_id);
+  if (id > 0) {
+    state.responseMessageID = id;
+  }
+  setContinueStatus(state, asString(response.status));
+  if (response.auto_continue === true) {
+    state.lastStatus = 'AUTO_CONTINUE';
+  }
+}
+
+function observeContinueBatchPatches(state, parentPath, raw) {
+  if (!state || !Array.isArray(raw)) {
+    return;
+  }
+  for (const patch of raw) {
+    if (!patch || typeof patch !== 'object') {
+      continue;
+    }
+    const path = asString(patch.p).trim();
+    if (!path) {
+      continue;
+    }
+    let fullPath = path;
+    const parent = asString(parentPath).trim().replace(/^\/+|\/+$/g, '');
+    if (parent && !path.includes('/')) {
+      fullPath = `${parent}/${path}`;
+    }
+    switch (fullPath.replace(/^\/+|\/+$/g, '')) {
+      case 'response/status':
+      case 'status':
+      case 'response/quasi_status':
+      case 'quasi_status':
+        setContinueStatus(state, asString(patch.v));
+        break;
+      case 'response/auto_continue':
+      case 'auto_continue':
+        if (patch.v === true) {
+          state.lastStatus = 'AUTO_CONTINUE';
+        }
+        break;
+      default:
+        break;
     }
-    setContinueStatus(state, asString(messageResponse.status));
   }
 }
 
@@ -540,7 +606,7 @@ function setContinueStatus(state, status) {
     return;
   }
   state.lastStatus = normalized;
-  if (normalized.toUpperCase() === 'FINISHED') {
+  if (['FINISHED', 'CONTENT_FILTER'].includes(normalized.toUpperCase())) {
     state.finished = true;
   }
 }
@@ -549,7 +615,7 @@ function shouldAutoContinue(state) {
   if (!state || state.finished || !state.sessionID || state.responseMessageID <= 0) {
     return false;
   }
-  return ['WIP', 'INCOMPLETE', 'AUTO_CONTINUE'].includes(asString(state.lastStatus).trim().toUpperCase());
+  return ['INCOMPLETE', 'AUTO_CONTINUE'].includes(asString(state.lastStatus).trim().toUpperCase());
 }
 
 function numberValue(v) {

internal/js/helpers/stream-tool-sieve/format.js

@@ -2,11 +2,12 @@
 
 const crypto = require('crypto');
 
-function formatOpenAIStreamToolCalls(calls, idStore) {
+function formatOpenAIStreamToolCalls(calls, idStore, toolsRaw) {
   if (!Array.isArray(calls) || calls.length === 0) {
     return [];
   }
-  return calls.map((c, idx) => ({
+  const normalized = normalizeParsedToolCallsForSchemas(calls, toolsRaw);
+  return normalized.map((c, idx) => ({
     index: idx,
     id: ensureStreamToolCallID(idStore, idx),
     type: 'function',
@@ -17,6 +18,194 @@ function formatOpenAIStreamToolCalls(calls, idStore) {
   }));
 }
 
+function normalizeParsedToolCallsForSchemas(calls, toolsRaw) {
+  if (!Array.isArray(calls) || calls.length === 0) {
+    return calls;
+  }
+  const schemas = buildToolSchemaIndex(toolsRaw);
+  if (!schemas) {
+    return calls;
+  }
+  let changedAny = false;
+  const out = calls.map((call) => {
+    const name = String(call && call.name || '').trim().toLowerCase();
+    const schema = schemas[name];
+    if (!schema || !call || !call.input || typeof call.input !== 'object' || Array.isArray(call.input)) {
+      return call;
+    }
+    const [normalized, changed] = normalizeToolValueWithSchema(call.input, schema);
+    if (!changed || !normalized || typeof normalized !== 'object' || Array.isArray(normalized)) {
+      return call;
+    }
+    changedAny = true;
+    return { ...call, input: normalized };
+  });
+  return changedAny ? out : calls;
+}
+
+function buildToolSchemaIndex(toolsRaw) {
+  if (!Array.isArray(toolsRaw) || toolsRaw.length === 0) {
+    return null;
+  }
+  const out = {};
+  for (const item of toolsRaw) {
+    if (!item || typeof item !== 'object' || Array.isArray(item)) {
+      continue;
+    }
+    const [name, schema] = extractToolNameAndSchema(item);
+    if (!name || !schema || typeof schema !== 'object' || Array.isArray(schema)) {
+      continue;
+    }
+    out[name.toLowerCase()] = schema;
+  }
+  return Object.keys(out).length > 0 ? out : null;
+}
+
+function extractToolNameAndSchema(tool) {
+  const fn = tool && typeof tool.function === 'object' && !Array.isArray(tool.function) ? tool.function : null;
+  const name = firstNonEmptyString(tool.name, fn && fn.name);
+  const schema = firstNonNil(
+    tool.parameters,
+    tool.input_schema,
+    tool.inputSchema,
+    tool.schema,
+    fn && fn.parameters,
+    fn && fn.input_schema,
+    fn && fn.inputSchema,
+    fn && fn.schema,
+  );
+  return [name, schema];
+}
+
+function normalizeToolValueWithSchema(value, schema) {
+  if (value == null || !schema || typeof schema !== 'object' || Array.isArray(schema)) {
+    return [value, false];
+  }
+  if (shouldCoerceSchemaToString(schema)) {
+    return stringifySchemaValue(value);
+  }
+  if (looksLikeObjectSchema(schema)) {
+    if (!value || typeof value !== 'object' || Array.isArray(value)) {
+      return [value, false];
+    }
+    const properties = schema.properties && typeof schema.properties === 'object' && !Array.isArray(schema.properties) ? schema.properties : null;
+    const additional = schema.additionalProperties;
+    let changed = false;
+    const out = {};
+    for (const [key, current] of Object.entries(value)) {
+      let next = current;
+      let fieldChanged = false;
+      if (properties && Object.prototype.hasOwnProperty.call(properties, key)) {
+        [next, fieldChanged] = normalizeToolValueWithSchema(current, properties[key]);
+      } else if (additional != null) {
+        [next, fieldChanged] = normalizeToolValueWithSchema(current, additional);
+      }
+      out[key] = next;
+      changed = changed || fieldChanged;
+    }
+    return changed ? [out, true] : [value, false];
+  }
+  if (looksLikeArraySchema(schema)) {
+    if (!Array.isArray(value) || value.length === 0 || schema.items == null) {
+      return [value, false];
+    }
+    let changed = false;
+    const out = value.map((item, idx) => {
+      const itemSchema = Array.isArray(schema.items) ? schema.items[idx] : schema.items;
+      if (itemSchema == null) {
+        return item;
+      }
+      const [next, itemChanged] = normalizeToolValueWithSchema(item, itemSchema);
+      changed = changed || itemChanged;
+      return next;
+    });
+    return changed ? [out, true] : [value, false];
+  }
+  return [value, false];
+}
+
+function shouldCoerceSchemaToString(schema) {
+  if (!schema || typeof schema !== 'object' || Array.isArray(schema)) {
+    return false;
+  }
+  if (typeof schema.const === 'string') {
+    return true;
+  }
+  if (Array.isArray(schema.enum) && schema.enum.length > 0 && schema.enum.every((item) => typeof item === 'string')) {
+    return true;
+  }
+  if (typeof schema.type === 'string') {
+    return schema.type.trim().toLowerCase() === 'string';
+  }
+  if (Array.isArray(schema.type) && schema.type.length > 0) {
+    let hasString = false;
+    for (const item of schema.type) {
+      if (typeof item !== 'string') {
+        return false;
+      }
+      const typ = item.trim().toLowerCase();
+      if (typ === 'string') {
+        hasString = true;
+      } else if (typ !== 'null') {
+        return false;
+      }
+    }
+    return hasString;
+  }
+  return false;
+}
+
+function looksLikeObjectSchema(schema) {
+  return !!schema && typeof schema === 'object' && !Array.isArray(schema) && (
+    (typeof schema.type === 'string' && schema.type.trim().toLowerCase() === 'object') ||
+    (schema.properties && typeof schema.properties === 'object' && !Array.isArray(schema.properties)) ||
+    schema.additionalProperties != null
+  );
+}
+
+function looksLikeArraySchema(schema) {
+  return !!schema && typeof schema === 'object' && !Array.isArray(schema) && (
+    (typeof schema.type === 'string' && schema.type.trim().toLowerCase() === 'array') ||
+    schema.items != null
+  );
+}
+
+function stringifySchemaValue(value) {
+  if (value == null) {
+    return [value, false];
+  }
+  if (typeof value === 'string') {
+    return [value, false];
+  }
+  try {
+    return [JSON.stringify(value), true];
+  } catch {
+    return [value, false];
+  }
+}
+
+function firstNonNil(...values) {
+  for (const value of values) {
+    if (value != null) {
+      return value;
+    }
+  }
+  return null;
+}
+
+function firstNonEmptyString(...values) {
+  for (const value of values) {
+    if (typeof value !== 'string') {
+      continue;
+    }
+    const trimmed = value.trim();
+    if (trimmed) {
+      return trimmed;
+    }
+  }
+  return '';
+}
+
 function ensureStreamToolCallID(idStore, index) {
   if (!(idStore instanceof Map)) {
     return `call_${newCallID()}`;

internal/js/helpers/stream-tool-sieve/parse_payload.js

@@ -248,6 +248,9 @@ function replaceDSMLToolMarkupOutsideIgnored(text) {
     if (tag) {
       if (tag.dsmlLike) {
         out += `<${tag.closing ? '/' : ''}${tag.name}${raw.slice(tag.nameEnd, tag.end + 1)}`;
+        if (raw[tag.end] !== '>') {
+          out += '>';
+        }
       } else {
         out += raw.slice(tag.start, tag.end + 1);
       }
@@ -424,31 +427,42 @@ function scanToolMarkupTagAt(text, start) {
   }
   const lower = raw.toLowerCase();
   let i = start + 1;
+  while (i < raw.length && raw[i] === '<') {
+    i += 1;
+  }
   const closing = raw[i] === '/';
   if (closing) {
     i += 1;
   }
-  let dsmlLike = false;
-  if (i < raw.length && isToolMarkupPipe(raw[i])) {
-    dsmlLike = true;
-    i += 1;
-  }
-  if (lower.startsWith('dsml', i)) {
-    dsmlLike = true;
-    i += 'dsml'.length;
-    while (i < raw.length && isToolMarkupSeparator(raw[i])) {
-      i += 1;
-    }
-  }
+  const prefix = consumeToolMarkupNamePrefix(raw, lower, i);
+  i = prefix.next;
+  const dsmlLike = prefix.dsmlLike;
   const { name, len } = matchToolMarkupName(lower, i);
   if (!name) {
     return null;
   }
-  const nameEnd = i + len;
+  const originalNameEnd = i + len;
+  let nameEnd = originalNameEnd;
+  while (nameEnd < raw.length && isToolMarkupPipe(raw[nameEnd])) {
+    nameEnd += 1;
+  }
+  const hasTrailingPipe = nameEnd > originalNameEnd;
   if (!hasXmlTagBoundary(raw, nameEnd)) {
     return null;
   }
-  const end = findXmlTagEnd(raw, nameEnd);
+  let end = findXmlTagEnd(raw, nameEnd);
+  if (end < 0) {
+    if (!hasTrailingPipe) {
+      return null;
+    }
+    end = nameEnd - 1;
+  }
+  if (hasTrailingPipe) {
+    const nextLT = raw.indexOf('<', nameEnd);
+    if (nextLT >= 0 && end >= nextLT) {
+      end = nameEnd - 1;
+    }
+  }
   if (end < 0) {
     return null;
   }
@@ -520,37 +534,94 @@ function findPartialToolMarkupStart(text) {
   if (lastLT < 0) {
     return -1;
   }
-  const tail = raw.slice(lastLT);
+  const start = includeDuplicateLeadingLessThan(raw, lastLT);
+  const tail = raw.slice(start);
   if (tail.includes('>')) {
     return -1;
   }
-  const lowerTail = tail.toLowerCase();
-  const candidates = [
-    '<tool_calls', '<invoke', '<parameter',
-    '<|tool_calls', '<|invoke', '<|parameter',
-    '<｜tool_calls', '<｜invoke', '<｜parameter',
-    '<|dsml|tool_calls', '<|dsml|invoke', '<|dsml|parameter',
-    '<｜dsml|tool_calls', '<｜dsml|invoke', '<｜dsml|parameter',
-    '<dsmltool_calls', '<dsmlinvoke', '<dsmlparameter',
-    '<dsml tool_calls', '<dsml invoke', '<dsml parameter',
-    '<dsml|tool_calls', '<dsml|invoke', '<dsml|parameter',
-    '<|dsmltool_calls', '<|dsmlinvoke', '<|dsmlparameter',
-    '<|dsml tool_calls', '<|dsml invoke', '<|dsml parameter',
-  ];
-  for (const candidate of candidates) {
-    if (candidate.startsWith(lowerTail)) {
-      return lastLT;
-    }
+  return isPartialToolMarkupTagPrefix(tail) ? start : -1;
+}
+
+function includeDuplicateLeadingLessThan(text, idx) {
+  let out = idx;
+  while (out > 0 && text[out - 1] === '<') {
+    out -= 1;
   }
-  return -1;
+  return out;
 }
 
 function isToolMarkupPipe(ch) {
   return ch === '|' || ch === '｜';
 }
 
-function isToolMarkupSeparator(ch) {
-  return ch === ' ' || ch === '\t' || ch === '\r' || ch === '\n' || isToolMarkupPipe(ch);
+function isPartialToolMarkupTagPrefix(text) {
+  const raw = toStringSafe(text);
+  if (!raw || raw[0] !== '<' || raw.includes('>')) {
+    return false;
+  }
+  const lower = raw.toLowerCase();
+  let i = 1;
+  while (i < raw.length && raw[i] === '<') {
+    i += 1;
+  }
+  if (i >= raw.length) {
+    return true;
+  }
+  if (raw[i] === '/') {
+    i += 1;
+  }
+  while (i <= raw.length) {
+    if (i === raw.length) {
+      return true;
+    }
+    if (hasToolMarkupNamePrefix(lower.slice(i))) {
+      return true;
+    }
+    if ('dsml'.startsWith(lower.slice(i))) {
+      return true;
+    }
+    const next = consumeToolMarkupNamePrefixOnce(raw, lower, i);
+    if (!next.ok) {
+      return false;
+    }
+    i = next.next;
+  }
+  return false;
+}
+
+function consumeToolMarkupNamePrefix(raw, lower, idx) {
+  let next = idx;
+  let dsmlLike = false;
+  while (true) {
+    const consumed = consumeToolMarkupNamePrefixOnce(raw, lower, next);
+    if (!consumed.ok) {
+      return { next, dsmlLike };
+    }
+    next = consumed.next;
+    dsmlLike = true;
+  }
+}
+
+function consumeToolMarkupNamePrefixOnce(raw, lower, idx) {
+  if (idx < raw.length && isToolMarkupPipe(raw[idx])) {
+    return { next: idx + 1, ok: true };
+  }
+  if (idx < raw.length && [' ', '\t', '\r', '\n'].includes(raw[idx])) {
+    return { next: idx + 1, ok: true };
+  }
+  if (lower.startsWith('dsml', idx)) {
+    return { next: idx + 'dsml'.length, ok: true };
+  }
+  return { next: idx, ok: false };
+}
+
+function hasToolMarkupNamePrefix(lowerTail) {
+  for (const name of TOOL_MARKUP_NAMES) {
+    if (lowerTail.startsWith(name) || name.startsWith(lowerTail)) {
+      return true;
+    }
+  }
+  return false;
 }
 
 function matchToolMarkupName(lower, start) {
@@ -775,10 +846,18 @@ function parseMarkupValue(raw, paramName = '') {
   if (cdata.ok) {
     const literal = parseJSONLiteralValue(cdata.value);
     if (literal.ok) {
+      const literalArray = coerceArrayValue(literal.value, paramName);
+      if (literalArray.ok) {
+        return literalArray.value;
+      }
       return literal.value;
     }
     const structured = parseStructuredCDATAParameterValue(paramName, cdata.value);
-    return structured.ok ? structured.value : cdata.value;
+    if (structured.ok) {
+      return structured.value;
+    }
+    const looseArray = parseLooseJSONArrayValue(cdata.value, paramName);
+    return looseArray.ok ? looseArray.value : cdata.value;
   }
   const s = toStringSafe(extractRawTagValue(raw)).trim();
   if (!s) {
@@ -791,8 +870,14 @@ function parseMarkupValue(raw, paramName = '') {
       return nested;
     }
     if (nested && typeof nested === 'object') {
+      const nestedArray = coerceArrayValue(nested, paramName);
+      if (nestedArray.ok) {
+        return nestedArray.value;
+      }
       if (isOnlyRawValue(nested)) {
-        return toStringSafe(nested._raw);
+        const rawValue = toStringSafe(nested._raw);
+        const looseArray = parseLooseJSONArrayValue(rawValue, paramName);
+        return looseArray.ok ? looseArray.value : rawValue;
       }
       return nested;
     }
@@ -800,8 +885,16 @@ function parseMarkupValue(raw, paramName = '') {
 
   const literal = parseJSONLiteralValue(s);
   if (literal.ok) {
+    const literalArray = coerceArrayValue(literal.value, paramName);
+    if (literalArray.ok) {
+      return literalArray.value;
+    }
     return literal.value;
   }
+  const looseArray = parseLooseJSONArrayValue(s, paramName);
+  if (looseArray.ok) {
+    return looseArray.value;
+  }
   return s;
 }
 
@@ -937,6 +1030,226 @@ function parseJSONLiteralValue(raw) {
   }
 }
 
+function parseLooseJSONArrayValue(raw, paramName = '') {
+  if (preservesCDATAStringParameter(paramName)) {
+    return { ok: false, value: null };
+  }
+  const s = toStringSafe(raw).trim();
+  if (!s) {
+    return { ok: false, value: null };
+  }
+  const candidate = parseLooseJSONArrayCandidate(s, paramName);
+  if (candidate.ok) {
+    return candidate;
+  }
+
+  const segments = splitTopLevelJSONValues(s);
+  if (segments.length < 2) {
+    return { ok: false, value: null };
+  }
+
+  const out = [];
+  for (const segment of segments) {
+    const parsed = parseLooseArrayElementValue(segment);
+    if (!parsed.ok) {
+      return { ok: false, value: null };
+    }
+    out.push(parsed.value);
+  }
+  return { ok: true, value: out };
+}
+
+function parseLooseJSONArrayCandidate(raw, paramName = '') {
+  const parsed = parseLooseArrayElementValue(raw);
+  if (!parsed.ok) {
+    return { ok: false, value: null };
+  }
+  return coerceArrayValue(parsed.value, paramName);
+}
+
+function parseLooseArrayElementValue(raw) {
+  const s = toStringSafe(raw).trim();
+  if (!s) {
+    return { ok: false, value: null };
+  }
+
+  const literal = parseJSONLiteralValue(s);
+  if (literal.ok) {
+    return literal;
+  }
+
+  const repairedBackslashes = repairInvalidJSONBackslashes(s);
+  if (repairedBackslashes !== s) {
+    try {
+      const parsed = JSON.parse(repairedBackslashes);
+      return { ok: true, value: parsed };
+    } catch (_err) {
+      // Fall through.
+    }
+  }
+
+  const repairedLoose = repairLooseJSON(s);
+  if (repairedLoose !== s) {
+    try {
+      const parsed = JSON.parse(repairedLoose);
+      return { ok: true, value: parsed };
+    } catch (_err) {
+      // Fall through.
+    }
+  }
+
+  if (s.includes('<') && s.includes('>')) {
+    const parsed = parseMarkupInput(s);
+    if (Array.isArray(parsed)) {
+      return { ok: true, value: parsed };
+    }
+    if (parsed && typeof parsed === 'object') {
+      return { ok: true, value: parsed };
+    }
+  }
+
+  return { ok: false, value: null };
+}
+
+function coerceArrayValue(value, paramName = '') {
+  if (Array.isArray(value)) {
+    return { ok: true, value };
+  }
+  if (!value || typeof value !== 'object') {
+    return { ok: false, value: null };
+  }
+
+  const keys = Object.keys(value);
+  if (keys.length !== 1) {
+    return { ok: false, value: null };
+  }
+
+  if (Object.prototype.hasOwnProperty.call(value, 'item')) {
+    const items = value.item;
+    const nested = coerceArrayValue(items, '');
+    return nested.ok ? nested : { ok: true, value: [items] };
+  }
+
+  if (paramName && Object.prototype.hasOwnProperty.call(value, paramName)) {
+    const nested = coerceArrayValue(value[paramName], '');
+    if (nested.ok) {
+      return nested;
+    }
+  }
+
+  return { ok: false, value: null };
+}
+
+function splitTopLevelJSONValues(raw) {
+  const s = toStringSafe(raw).trim();
+  if (!s) {
+    return [];
+  }
+
+  const values = [];
+  let start = 0;
+  let depth = 0;
+  let inString = false;
+  let escaped = false;
+
+  for (let i = 0; i < s.length; i += 1) {
+    const ch = s[i];
+    if (inString) {
+      if (escaped) {
+        escaped = false;
+        continue;
+      }
+      if (ch === '\\') {
+        escaped = true;
+        continue;
+      }
+      if (ch === '"') {
+        inString = false;
+      }
+      continue;
+    }
+    if (ch === '"') {
+      inString = true;
+      continue;
+    }
+    if (ch === '{' || ch === '[') {
+      depth += 1;
+      continue;
+    }
+    if (ch === '}' || ch === ']') {
+      if (depth > 0) {
+        depth -= 1;
+      }
+      continue;
+    }
+    if (ch === ',' && depth === 0) {
+      const segment = s.slice(start, i).trim();
+      if (!segment) {
+        return [];
+      }
+      values.push(segment);
+      start = i + 1;
+    }
+  }
+
+  const last = s.slice(start).trim();
+  if (!last) {
+    return [];
+  }
+  values.push(last);
+  return values.length > 1 ? values : [];
+}
+
+function repairInvalidJSONBackslashes(s) {
+  if (!s || !s.includes('\\')) {
+    return s;
+  }
+
+  let out = '';
+  for (let i = 0; i < s.length; i += 1) {
+    const ch = s[i];
+    if (ch !== '\\') {
+      out += ch;
+      continue;
+    }
+    if (i + 1 < s.length) {
+      const next = s[i + 1];
+      if ('"\\/bfnrt'.includes(next)) {
+        out += `\\${next}`;
+        i += 1;
+        continue;
+      }
+      if (next === 'u' && i + 5 < s.length) {
+        let isHex = true;
+        for (let j = 1; j <= 4; j += 1) {
+          const r = s[i + 1 + j];
+          if (!/[0-9a-fA-F]/.test(r)) {
+            isHex = false;
+            break;
+          }
+        }
+        if (isHex) {
+          out += `\\u${s.slice(i + 2, i + 6)}`;
+          i += 5;
+          continue;
+        }
+      }
+    }
+    out += '\\\\';
+  }
+  return out;
+}
+
+function repairLooseJSON(s) {
+  const raw = toStringSafe(s).trim();
+  if (!raw) {
+    return raw;
+  }
+  let out = raw.replace(/([{,]\s*)([a-zA-Z_][a-zA-Z0-9_]*)\s*:/g, '$1"$2":');
+  out = out.replace(/(:\s*)(\{(?:[^{}]|\{[^{}]*\})*\}(?:\s*,\s*\{(?:[^{}]|\{[^{}]*\})*\})+)/g, '$1[$2]');
+  return out;
+}
+
 function sanitizeLooseCDATA(text) {
   const raw = toStringSafe(text);
   if (!raw) {

internal/js/helpers/stream-tool-sieve/tool-keywords.js

@@ -1,55 +0,0 @@
-'use strict';
-
-const XML_TOOL_SEGMENT_TAGS = [
-  '<|dsml|tool_calls>', '<|dsml|tool_calls\n', '<|dsml|tool_calls ',
-  '<｜dsml|tool_calls>', '<｜dsml|tool_calls\n', '<｜dsml|tool_calls ',
-  '<|dsml|invoke ', '<|dsml|invoke\n', '<|dsml|invoke\t', '<|dsml|invoke\r',
-  '<|dsmltool_calls>', '<|dsmltool_calls\n', '<|dsmltool_calls ',
-  '<|dsmlinvoke ', '<|dsmlinvoke\n', '<|dsmlinvoke\t', '<|dsmlinvoke\r',
-  '<|dsml tool_calls>', '<|dsml tool_calls\n', '<|dsml tool_calls ',
-  '<|dsml invoke ', '<|dsml invoke\n', '<|dsml invoke\t', '<|dsml invoke\r',
-  '<dsml|tool_calls>', '<dsml|tool_calls\n', '<dsml|tool_calls ',
-  '<dsml|invoke ', '<dsml|invoke\n', '<dsml|invoke\t', '<dsml|invoke\r',
-  '<dsmltool_calls>', '<dsmltool_calls\n', '<dsmltool_calls ',
-  '<dsmlinvoke ', '<dsmlinvoke\n', '<dsmlinvoke\t', '<dsmlinvoke\r',
-  '<dsml tool_calls>', '<dsml tool_calls\n', '<dsml tool_calls ',
-  '<dsml invoke ', '<dsml invoke\n', '<dsml invoke\t', '<dsml invoke\r',
-  '<｜tool_calls>', '<｜tool_calls\n', '<｜tool_calls ',
-  '<｜invoke ', '<｜invoke\n', '<｜invoke\t', '<｜invoke\r',
-  '<|tool_calls>', '<|tool_calls\n', '<|tool_calls ',
-  '<|invoke ', '<|invoke\n', '<|invoke\t', '<|invoke\r',
-  '<tool_calls>', '<tool_calls\n', '<tool_calls ',
-  '<invoke ', '<invoke\n', '<invoke\t', '<invoke\r',
-];
-
-const XML_TOOL_OPENING_TAGS = [
-  '<|dsml|tool_calls',
-  '<｜dsml|tool_calls',
-  '<|dsmltool_calls',
-  '<|dsml tool_calls',
-  '<dsml|tool_calls',
-  '<dsmltool_calls',
-  '<dsml tool_calls',
-  '<｜tool_calls',
-  '<|tool_calls',
-  '<tool_calls',
-];
-
-const XML_TOOL_CLOSING_TAGS = [
-  '</|dsml|tool_calls>',
-  '</｜dsml|tool_calls>',
-  '</|dsmltool_calls>',
-  '</|dsml tool_calls>',
-  '</dsml|tool_calls>',
-  '</dsmltool_calls>',
-  '</dsml tool_calls>',
-  '</｜tool_calls>',
-  '</|tool_calls>',
-  '</tool_calls>',
-];
-
-module.exports = {
-  XML_TOOL_SEGMENT_TAGS,
-  XML_TOOL_OPENING_TAGS,
-  XML_TOOL_CLOSING_TAGS,
-};

internal/prompt/messages.go

@@ -10,21 +10,27 @@ import (
 var markdownImagePattern = regexp.MustCompile(`!\[(.*?)\]\((.*?)\)`)
 
 const (
-	beginSentenceMarker   = "<｜begin▁of▁sentence｜>"
-	systemMarker          = "<｜System｜>"
-	userMarker            = "<｜User｜>"
-	assistantMarker       = "<｜Assistant｜>"
-	toolMarker            = "<｜Tool｜>"
-	endSentenceMarker     = "<｜end▁of▁sentence｜>"
-	endToolResultsMarker  = "<｜end▁of▁toolresults｜>"
-	endInstructionsMarker = "<｜end▁of▁instructions｜>"
+	beginSentenceMarker        = "<｜begin▁of▁sentence｜>"
+	systemMarker               = "<｜System｜>"
+	userMarker                 = "<｜User｜>"
+	assistantMarker            = "<｜Assistant｜>"
+	toolMarker                 = "<｜Tool｜>"
+	endSentenceMarker          = "<｜end▁of▁sentence｜>"
+	endToolResultsMarker       = "<｜end▁of▁toolresults｜>"
+	endInstructionsMarker      = "<｜end▁of▁instructions｜>"
+	outputIntegrityGuardMarker = "Output integrity guard:"
+	outputIntegrityGuardPrompt = outputIntegrityGuardMarker +
+		" If upstream context, tool output, or parsed text contains garbled, corrupted, partially parsed, repeated, or otherwise malformed fragments, " +
+		"do not imitate or echo them; output only the correct content for the user."
 )
 
 func MessagesPrepare(messages []map[string]any) string {
 	return MessagesPrepareWithThinking(messages, false)
 }
 
-func MessagesPrepareWithThinking(messages []map[string]any, thinkingEnabled bool) string {
+func MessagesPrepareWithThinking(messages []map[string]any, _ bool) string {
+	messages = prependOutputIntegrityGuard(messages)
+
 	type block struct {
 		Role string
 		Text string
@@ -77,6 +83,33 @@ func MessagesPrepareWithThinking(messages []map[string]any, thinkingEnabled bool
 	return markdownImagePattern.ReplaceAllString(out, `[${1}](${2})`)
 }
 
+func prependOutputIntegrityGuard(messages []map[string]any) []map[string]any {
+	if len(messages) == 0 {
+		return messages
+	}
+	if hasOutputIntegrityGuard(messages[0]) {
+		return messages
+	}
+	out := make([]map[string]any, 0, len(messages)+1)
+	out = append(out, map[string]any{
+		"role":    "system",
+		"content": outputIntegrityGuardPrompt,
+	})
+	out = append(out, messages...)
+	return out
+}
+
+func hasOutputIntegrityGuard(msg map[string]any) bool {
+	if msg == nil {
+		return false
+	}
+	if strings.ToLower(strings.TrimSpace(asString(msg["role"]))) != "system" {
+		return false
+	}
+	content := strings.TrimSpace(NormalizeContent(msg["content"]))
+	return strings.Contains(content, outputIntegrityGuardMarker)
+}
+
 // formatRoleBlock produces a single concatenated block: marker + text + endMarker.
 // No whitespace is inserted between marker and text so role boundaries stay
 // compact and predictable for downstream parsers.