识图与文件上传/预览:可配置视觉模型 + 修复上传与回显

后端:
- 新增可配置识图模型(config: vision.model_name/prompt/max_tokens)。配置后 view_image 委托该模型识别并返回文字结果,文本主模型也能“看图”;未配置时回退到主模型自带视觉能力。新增 deerflow/models/vision.py 与 VisionConfig。
- 修复 Windows 上传全部报 unsafe:open_upload_file_no_symlink 不再强制要求 POSIX 专有的 O_NOFOLLOW,缺失时降级(仍用 lstat/fstat 防符号链接),Windows 追加 O_BINARY。
- 修复 normalize_input 丢弃 human 消息 additional_kwargs:保留 files/client_ts 等,使上传文件能回传到 UI 并被 UploadsMiddleware 识别。
- 约束 agent 行为:上传图片时引导只用 view_image,禁止用 read_file/grep/bash/python 解析图片字节;view_image 工具说明同步加固。
- 启用文档转换(uploads.auto_convert_documents),PDF/Word/Excel/PPT 自动转 Markdown 供 read_file/grep 读取。
- 订正若干模型错误的 supports_vision 标记。

前端:
- 修复上传文件不回显:parseUploadedFiles 不再因 "(empty)" 提前返回。
- 修复 artifact 401 破图:改用带 Authorization 头的 apiFetch 取 blob 显示(新增 useAuthedObjectUrl)。
- 新增上传文件预览弹窗:点击卡片可查看图片/文本/Markdown、Office(读转换后的 .md)、PDF;文件卡片改为可点击。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend-web/src/components/workspace/messages/message-list-item.tsx

@@ -5,6 +5,7 @@ import {
   useCallback,
   useContext,
   useMemo,
+  useState,
   type AnchorHTMLAttributes,
   type ImgHTMLAttributes,
 } from "react";
@@ -24,6 +25,10 @@ import {
 } from "@/components/ai-elements/reasoning";
 import { Task, TaskTrigger } from "@/components/ai-elements/task";
 import { Badge } from "@/components/ui/badge";
+import {
+  UploadedFilePreviewDialog,
+  useAuthedObjectUrl,
+} from "@/components/workspace/messages/uploaded-file-preview-dialog";
 import { resolveArtifactURL } from "@/core/artifacts/utils";
 import { useChatAskTimes } from "@/core/chat-timestamps";
 import { getBackendBaseURL } from "@/core/config";
@@ -466,8 +471,17 @@ function RichFileCard({
 }) {
   const { t } = useI18n();
   const resolveArtifact = useArtifactResolver(threadId);
+  const [previewOpen, setPreviewOpen] = useState(false);
   const isUploading = file.status === "uploading";
   const isImage = isImageFile(file.filename);
+  const fileUrl = file.path ? resolveArtifact(file.path) : null;
+  // Thumbnails must be fetched with auth: the artifact route is gated and a
+  // plain <img src> sends no Authorization header → 401 (broken image). Fetch
+  // the bytes via apiFetch and display the resulting object URL instead.
+  const { objectUrl: thumbUrl, loading: thumbLoading } = useAuthedObjectUrl(
+    fileUrl,
+    isImage && !isUploading && !!fileUrl,
+  );
 
   if (isUploading) {
     return (
@@ -496,50 +510,81 @@ function RichFileCard({
     );
   }
 
-  if (!file.path) return null;
+  if (!fileUrl) return null;
 
-  const fileUrl = resolveArtifact(file.path);
+  const preview = (
+    <UploadedFilePreviewDialog
+      filename={file.filename}
+      fileUrl={fileUrl}
+      open={previewOpen}
+      onOpenChange={setPreviewOpen}
+    />
+  );
 
   if (isImage) {
     return (
-      <a
-        href={fileUrl}
-        target="_blank"
-        rel="noopener noreferrer"
-        className="group border-border/40 relative block overflow-hidden rounded-lg border"
-      >
-        <img
-          src={fileUrl}
-          alt={file.filename}
-          className="h-32 w-auto max-w-60 object-cover transition-transform group-hover:scale-105"
-        />
-      </a>
+      <>
+        <button
+          type="button"
+          onClick={() => setPreviewOpen(true)}
+          title={file.filename}
+          className="group border-border/40 relative block cursor-pointer overflow-hidden rounded-lg border"
+        >
+          {thumbUrl ? (
+            <img
+              src={thumbUrl}
+              alt={file.filename}
+              className="h-32 w-auto max-w-60 object-cover transition-transform group-hover:scale-105"
+            />
+          ) : (
+            <div className="bg-muted/40 text-muted-foreground flex h-32 w-44 items-center justify-center gap-2 text-xs">
+              {thumbLoading ? (
+                <Loader2Icon className="size-4 animate-spin" />
+              ) : (
+                <>
+                  <FileIcon className="size-4" />
+                  <span className="truncate">{file.filename}</span>
+                </>
+              )}
+            </div>
+          )}
+        </button>
+        {preview}
+      </>
     );
   }
 
   return (
-    <div className="bg-background border-border/40 flex max-w-50 min-w-30 flex-col gap-1 rounded-lg border p-3 shadow-sm">
-      <div className="flex items-start gap-2">
-        <FileIcon className="text-muted-foreground mt-0.5 size-4 shrink-0" />
-        <span
-          className="text-foreground truncate text-sm font-medium"
-          title={file.filename}
-        >
-          {file.filename}
-        </span>
-      </div>
-      <div className="flex items-center justify-between gap-2">
-        <Badge
-          variant="secondary"
-          className="rounded px-1.5 py-0.5 text-[10px] font-normal"
-        >
-          {getFileTypeLabel(file.filename)}
-        </Badge>
-        <span className="text-muted-foreground text-[10px]">
-          {formatBytes(file.size)}
-        </span>
-      </div>
-    </div>
+    <>
+      <button
+        type="button"
+        onClick={() => setPreviewOpen(true)}
+        title={file.filename}
+        className="bg-background border-border/40 hover:bg-accent/50 flex max-w-50 min-w-30 cursor-pointer flex-col gap-1 rounded-lg border p-3 text-left shadow-sm transition-colors"
+      >
+        <div className="flex items-start gap-2">
+          <FileIcon className="text-muted-foreground mt-0.5 size-4 shrink-0" />
+          <span
+            className="text-foreground truncate text-sm font-medium"
+            title={file.filename}
+          >
+            {file.filename}
+          </span>
+        </div>
+        <div className="flex items-center justify-between gap-2">
+          <Badge
+            variant="secondary"
+            className="rounded px-1.5 py-0.5 text-[10px] font-normal"
+          >
+            {getFileTypeLabel(file.filename)}
+          </Badge>
+          <span className="text-muted-foreground text-[10px]">
+            {formatBytes(file.size)}
+          </span>
+        </div>
+      </button>
+      {preview}
+    </>
   );
 }
 

frontend-web/src/components/workspace/messages/uploaded-file-preview-dialog.tsx

@@ -0,0 +1,278 @@
+"use client";
+
+import { DownloadIcon, Loader2 } from "lucide-react";
+import { useEffect, useMemo, useState } from "react";
+
+import { Button } from "@/components/ui/button";
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
+import { MarkdownContent } from "@/components/workspace/messages/markdown-content";
+import { apiFetch } from "@/core/api/fetch-client";
+import { useI18n } from "@/core/i18n/hooks";
+import { reasoningPlugins } from "@/core/streamdown";
+
+const markdownClassName =
+  "!h-auto !w-full max-w-none min-w-0 text-sm leading-7 " +
+  "[&_h1]:mt-0 [&_h1]:mb-3 [&_h1]:text-xl [&_h1]:font-semibold " +
+  "[&_h2]:mt-6 [&_h2]:mb-2 [&_h2]:border-b [&_h2]:pb-2 [&_h2]:text-lg [&_h2]:font-semibold " +
+  "[&_h3]:mt-5 [&_h3]:mb-2 [&_h3]:text-base [&_h3]:font-semibold " +
+  "[&_p]:my-3 [&_ul]:my-3 [&_ol]:my-3 [&_li]:my-1.5 " +
+  "[&_ul]:list-disc [&_ol]:list-decimal [&_ul]:pl-5 [&_ol]:pl-5 " +
+  "[&_table]:my-4 [&_table]:w-full [&_table]:border-collapse " +
+  "[&_th]:border [&_th]:px-2 [&_th]:py-1 [&_td]:border [&_td]:px-2 [&_td]:py-1 " +
+  "[&_blockquote]:my-4 [&_blockquote]:border-l-4 [&_blockquote]:pl-4 [&_blockquote]:text-muted-foreground " +
+  "[&_code]:rounded [&_code]:border [&_code]:bg-muted [&_code]:px-1.5 [&_code]:py-0.5 [&_code]:font-mono [&_code]:text-xs " +
+  "[&_pre]:my-4 [&_pre]:max-w-full [&_pre]:overflow-x-auto [&_pre]:rounded-lg [&_pre]:border [&_pre]:bg-muted [&_pre]:p-4 " +
+  "[&_pre_code]:border-0 [&_pre_code]:bg-transparent [&_pre_code]:p-0";
+
+const IMAGE_EXT = ["png", "jpg", "jpeg", "gif", "webp", "svg", "bmp"];
+const TEXT_EXT = [
+  "txt", "md", "markdown", "csv", "tsv", "json", "log", "yaml", "yml",
+  "xml", "html", "htm", "css", "js", "ts", "tsx", "jsx", "py", "java",
+  "go", "rs", "c", "cpp", "h", "hpp", "sh", "sql", "ini", "toml", "env",
+];
+// Office documents are converted to a sibling Markdown file server-side
+// (uploads.auto_convert_documents). We preview that .md instead of the binary.
+const OFFICE_EXT = ["xlsx", "xls", "docx", "doc", "pptx", "ppt"];
+
+function extOf(filename: string): string {
+  const i = filename.lastIndexOf(".");
+  return i >= 0 ? filename.slice(i + 1).toLowerCase() : "";
+}
+
+type PreviewKind = "image" | "text" | "office" | "pdf" | "binary";
+
+function kindOf(filename: string): PreviewKind {
+  const ext = extOf(filename);
+  if (IMAGE_EXT.includes(ext)) return "image";
+  if (ext === "pdf") return "pdf";
+  if (OFFICE_EXT.includes(ext)) return "office";
+  if (TEXT_EXT.includes(ext)) return "text";
+  return "binary";
+}
+
+function withReplacedExtension(url: string): string {
+  // Replace the path extension with .md, keeping any query string intact.
+  const [base, query] = url.split("?");
+  const i = base.lastIndexOf(".");
+  const swapped = (i >= 0 ? base.slice(0, i) : base) + ".md";
+  return query ? `${swapped}?${query}` : swapped;
+}
+
+/**
+ * Fetch an auth-gated artifact (the artifact route requires an
+ * `Authorization: Bearer` header, which a plain <img>/<iframe> cannot send —
+ * hence the 401s) and expose it as an object URL for inline display.
+ */
+export function useAuthedObjectUrl(url: string | null, enabled: boolean) {
+  const [objectUrl, setObjectUrl] = useState<string | null>(null);
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  useEffect(() => {
+    if (!enabled || !url) {
+      setObjectUrl(null);
+      return;
+    }
+    let cancelled = false;
+    let created: string | null = null;
+    setLoading(true);
+    setError(null);
+    apiFetch(url)
+      .then(async (res) => {
+        if (!res.ok) throw new Error(`HTTP ${res.status}`);
+        return res.blob();
+      })
+      .then((blob) => {
+        if (cancelled) return;
+        created = URL.createObjectURL(blob);
+        setObjectUrl(created);
+      })
+      .catch((err: unknown) => {
+        if (!cancelled)
+          setError(err instanceof Error ? err.message : String(err));
+      })
+      .finally(() => {
+        if (!cancelled) setLoading(false);
+      });
+    return () => {
+      cancelled = true;
+      if (created) URL.revokeObjectURL(created);
+    };
+  }, [url, enabled]);
+
+  return { objectUrl, loading, error };
+}
+
+/**
+ * Preview dialog for a file attached to a chat message. All fetches go through
+ * `apiFetch` so the `Authorization` header is attached (artifacts are auth-gated).
+ *
+ * - image  → fetched as blob, rendered inline
+ * - text   → fetched and shown (markdown rendered for .md, otherwise <pre>)
+ * - office → fetches the server-converted sibling `<name>.md` and renders it
+ * - pdf    → fetched as blob, embedded via <iframe>
+ * - else   → download link
+ */
+export function UploadedFilePreviewDialog({
+  filename,
+  fileUrl,
+  open,
+  onOpenChange,
+}: {
+  filename: string;
+  /** Absolute artifact URL for the original uploaded file. */
+  fileUrl: string;
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+}) {
+  const { t } = useI18n();
+  const kind = useMemo(() => kindOf(filename), [filename]);
+  const ext = useMemo(() => extOf(filename), [filename]);
+
+  // image / pdf → fetch as authed blob and display via object URL.
+  const blobEnabled = open && (kind === "image" || kind === "pdf");
+  const { objectUrl, loading: blobLoading, error: blobError } =
+    useAuthedObjectUrl(fileUrl, blobEnabled);
+
+  // text / office → fetch text (office reads the converted sibling .md).
+  const textUrl = useMemo(
+    () => (kind === "office" ? withReplacedExtension(fileUrl) : fileUrl),
+    [kind, fileUrl],
+  );
+  const [text, setText] = useState<string | null>(null);
+  const [textLoading, setTextLoading] = useState(false);
+  const [textError, setTextError] = useState<string | null>(null);
+
+  useEffect(() => {
+    if (!open || (kind !== "text" && kind !== "office")) return;
+    let cancelled = false;
+    setTextLoading(true);
+    setTextError(null);
+    setText(null);
+    apiFetch(textUrl)
+      .then(async (res) => {
+        if (!res.ok) throw new Error(`HTTP ${res.status}`);
+        return res.text();
+      })
+      .then((body) => {
+        if (!cancelled) setText(body);
+      })
+      .catch((err: unknown) => {
+        if (!cancelled)
+          setTextError(err instanceof Error ? err.message : String(err));
+      })
+      .finally(() => {
+        if (!cancelled) setTextLoading(false);
+      });
+    return () => {
+      cancelled = true;
+    };
+  }, [open, kind, textUrl]);
+
+  const renderAsMarkdown =
+    kind === "office" || ext === "md" || ext === "markdown";
+
+  const loadingView = (
+    <div className="text-muted-foreground flex items-center justify-center gap-2 py-12 text-sm">
+      <Loader2 className="size-4 animate-spin" />
+      {t.common.loading}
+    </div>
+  );
+
+  return (
+    <Dialog open={open} onOpenChange={onOpenChange}>
+      <DialogContent
+        className="flex flex-col gap-0 overflow-hidden p-0"
+        style={{
+          width: "min(56rem, calc(100vw - 2rem))",
+          maxWidth: "none",
+          height: "min(720px, calc(100dvh - 2rem))",
+        }}
+      >
+        <DialogHeader className="shrink-0 border-b px-5 py-3 pr-12">
+          <DialogTitle className="truncate text-sm">{filename}</DialogTitle>
+          <DialogDescription className="mt-0.5 truncate text-xs">
+            <a
+              href={fileUrl}
+              target="_blank"
+              rel="noopener noreferrer"
+              className="hover:text-foreground inline-flex items-center gap-1 underline-offset-2 hover:underline"
+            >
+              <DownloadIcon className="size-3" />
+              {t.common.download}
+            </a>
+          </DialogDescription>
+        </DialogHeader>
+
+        <div className="min-h-0 flex-1 overflow-auto px-5 py-4">
+          {kind === "image" ? (
+            blobLoading ? (
+              loadingView
+            ) : blobError || !objectUrl ? (
+              <BinaryFallback fileUrl={fileUrl} label={t.common.download} />
+            ) : (
+              <div className="flex items-center justify-center">
+                <img
+                  src={objectUrl}
+                  alt={filename}
+                  className="max-h-full max-w-full rounded border"
+                />
+              </div>
+            )
+          ) : kind === "pdf" ? (
+            blobLoading ? (
+              loadingView
+            ) : blobError || !objectUrl ? (
+              <BinaryFallback fileUrl={fileUrl} label={t.common.download} />
+            ) : (
+              <iframe
+                src={objectUrl}
+                title={filename}
+                className="h-full min-h-[500px] w-full rounded border"
+              />
+            )
+          ) : kind === "text" || kind === "office" ? (
+            textLoading ? (
+              loadingView
+            ) : textError ? (
+              <BinaryFallback fileUrl={fileUrl} label={t.common.download} />
+            ) : renderAsMarkdown ? (
+              <MarkdownContent
+                className={markdownClassName}
+                content={text ?? ""}
+                isLoading={false}
+                remarkPlugins={reasoningPlugins.remarkPlugins}
+                rehypePlugins={reasoningPlugins.rehypePlugins}
+              />
+            ) : (
+              <pre className="text-foreground/80 bg-muted/40 max-w-full overflow-x-auto rounded-lg border p-4 font-mono text-xs leading-relaxed whitespace-pre-wrap">
+                {text ?? ""}
+              </pre>
+            )
+          ) : (
+            <BinaryFallback fileUrl={fileUrl} label={t.common.download} />
+          )}
+        </div>
+      </DialogContent>
+    </Dialog>
+  );
+}
+
+function BinaryFallback({ fileUrl, label }: { fileUrl: string; label: string }) {
+  return (
+    <div className="text-muted-foreground flex flex-col items-center gap-3 rounded-lg border border-dashed px-4 py-12 text-center text-sm">
+      <Button asChild size="sm" variant="outline">
+        <a href={fileUrl} target="_blank" rel="noopener noreferrer" download>
+          <DownloadIcon className="size-3.5" />
+          {label}
+        </a>
+      </Button>
+    </div>
+  );
+}

frontend-web/src/core/messages/utils.ts

@@ -462,10 +462,10 @@ export function parseUploadedFiles(content: string): FileInMessage[] {
     return [];
   }
 
-  // Check if the backend reported no new files were uploaded in this message
-  if (uploadedFilesContent?.includes("(empty)")) {
-    return [];
-  }
+  // NOTE: do NOT bail on "(empty)" here. The backend writes "(empty)" only for
+  // the "uploaded in this message" section; files uploaded in previous messages
+  // are still listed below it. Bailing dropped those valid entries. The file
+  // regex below naturally skips the "(empty)" line, so parsing stays correct.
 
   // Parse file list
   // Format: - filename (size)\n  Path: /path/to/file

offline-backend-20260512/backend/CLAUDE.md

@@ -637,12 +637,21 @@ Automatic conversation summarization when approaching token limits:
 
 See [docs/summarization.md](docs/summarization.md) for details.
 
-### Vision Support
+### Vision Support / Image Recognition (识图)
 
-For models with `supports_vision: true`:
-- `ViewImageMiddleware` processes images in conversation
-- `view_image_tool` added to agent's toolset
-- Images automatically converted to base64 and injected into state
+Two paths, selected by `config.yaml` → `vision`:
+
+**Dedicated vision model (delegated recognition)** — set `vision.model_name` to a model from `models[]`. The `view_image` tool sends the image to that model and returns its **text description** as the tool result, so a text-only main chat model can still "see" images. `view_image` accepts an optional `question` argument for targeted queries; the default prompt is `vision.prompt` (overridable), and `vision.max_tokens` caps the recognition output. Resolution/gating lives in `deerflow/models/vision.py` (`resolve_vision_model_name`, `vision_enabled`, `is_delegated_vision`, `recognize_image`).
+
+**Native vision (fallback)** — when `vision.model_name` is unset, behavior falls back to the main chat model, which only works if it has `supports_vision: true`:
+- `ViewImageMiddleware` injects base64 image data into the conversation before the LLM call
+- `view_image` stores the image in `state.viewed_images` for that middleware
+
+Both the `view_image` tool and `ViewImageMiddleware` are registered whenever `vision_enabled(model_name)` is true (dedicated model configured **or** main model supports vision). Config schema: `deerflow/config/vision_config.py` (`VisionConfig`); tests: `tests/test_vision.py`.
+
+### Upload symlink-safety (cross-platform)
+
+`deerflow/uploads/manager.py:open_upload_file_no_symlink` writes uploads without following a pre-existing destination symlink. `O_NOFOLLOW` is applied where available (POSIX) but is **optional** — Windows lacks `os.O_NOFOLLOW`/`O_NONBLOCK`, so requiring it previously made every Windows upload fail with `UnsafeUploadPathError`. Pre-existing symlinks are still rejected via `lstat`, and the opened fd is re-checked with `fstat`. `O_BINARY` is added on Windows. Regression: `tests/test_uploads_windows_safe.py`.
 
 ## Code Style
 

offline-backend-20260512/backend/app/gateway/services.py

@@ -84,13 +84,23 @@ def normalize_input(raw_input: dict[str, Any] | None) -> dict[str, Any]:
         converted = []
         for msg in messages:
             if isinstance(msg, dict):
-                role = msg.get("role", msg.get("type", "user"))
                 content = msg.get("content", "")
-                if role in ("user", "human"):
-                    converted.append(HumanMessage(content=content))
-                else:
-                    # TODO: handle other message types (system, ai, tool)
-                    converted.append(HumanMessage(content=content))
+                # Preserve additional_kwargs (e.g. uploaded `files`, `client_ts`,
+                # `prompt_prefix`) and optional id/name so they round-trip through
+                # the checkpoint to the UI and to UploadsMiddleware. Dropping them
+                # here previously made uploaded files invisible in the chat and
+                # broke the per-message ask-time timestamp.
+                msg_kwargs: dict[str, Any] = {"content": content}
+                extra = msg.get("additional_kwargs")
+                if isinstance(extra, dict) and extra:
+                    msg_kwargs["additional_kwargs"] = extra
+                if msg.get("id"):
+                    msg_kwargs["id"] = msg["id"]
+                if msg.get("name"):
+                    msg_kwargs["name"] = msg["name"]
+                # TODO: handle other message types (system, ai, tool); for now all
+                # inbound dict messages are treated as human turns.
+                converted.append(HumanMessage(**msg_kwargs))
             else:
                 converted.append(msg)
         return {**raw_input, "messages": converted}

offline-backend-20260512/backend/config.yaml

@@ -33,7 +33,7 @@ models:
     max_retries: 2
     max_tokens: 4096
     temperature: 1.0
-    supports_vision: true
+    supports_vision: false
     supports_thinking: true
 
   - name: deepseek-v4-flash
@@ -46,7 +46,7 @@ models:
     max_retries: 2
     max_tokens: 4096
     temperature: 1.0
-    supports_vision: true
+    supports_vision: false
     supports_thinking: true
 
   - name: deepseek-v4-pro
@@ -59,7 +59,7 @@ models:
     max_retries: 2
     max_tokens: 4096
     temperature: 1.0
-    supports_vision: true
+    supports_vision: false
     supports_thinking: true
   - name: MiniMax-M2.7
     display_name: MiniMax-M2.7
@@ -81,6 +81,37 @@ models:
     temperature: 1.0
     supports_vision: true
     supports_thinking: true
+  - name: deepseek-ai/DeepSeek-OCR
+    display_name: deepseek-ai/DeepSeek-OCR
+    use: langchain_openai:ChatOpenAI
+    model: deepseek-ai/DeepSeek-OCR
+    api_key: sk-beshfxfxfrllsczpqfrgjbugfbpzxgqgedbehceytpcvvtyb
+    base_url: https://api.siliconflow.cn/v1/
+    max_tokens: 4096
+    temperature: 1.0
+    supports_vision: true
+    supports_thinking: true
+# 识图(图片识别)配置。
+# - model_name:指定一个 models[] 中的模型名,作为“默认识图大模型”。view_image 工具会把
+#   图片交给该模型识别,并把识别出的文字结果返回给主对话模型 —— 这样即使主对话模型不支持
+#   视觉,也能“看图”。请改成你实际用于识图的模型名。
+# - 若留空 / 注释掉 model_name,则回退到主对话模型自身的视觉能力(需该模型 supports_vision: true)。
+# - prompt:不带具体问题时使用的默认识图指令(可选)。
+# - max_tokens:识图模型输出上限(可选,默认用该模型自身的配置)。
+vision:
+  model_name: deepseek-ai/DeepSeek-OCR
+  # prompt: 请详细描述这张图片的内容。
+  # max_tokens: 2048
+
+# 上传文件识别配置。
+# - auto_convert_documents: true 时,上传的 PDF / Word / Excel / PPT 会在服务端自动转换为
+#   Markdown(.md),agent 通过 read_file / grep 读取其内容 —— 即“识别”文档内容。
+#   纯文本类(txt / csv / md / json / 代码等)无需转换,agent 用 read_file 直接读取。
+#   图片(png/jpg/webp)由 view_image + 上面的 vision 识图模型处理。
+# - pdf_converter: auto(优先 pymupdf4llm,缺失时回退 markitdown)| pymupdf4llm | markitdown
+uploads:
+  auto_convert_documents: true
+  pdf_converter: auto
 
 title:
   enabled: true

offline-backend-20260512/backend/packages/harness/deerflow/agents/lead_agent/agent.py

@@ -288,10 +288,14 @@ def _build_middlewares(
     if not is_bootstrap:
         middlewares.append(MemoryMiddleware(agent_name=agent_name, memory_config=resolved_app_config.memory, injection_enabled=memory_injection_enabled))
 
-    # Add ViewImageMiddleware only if the current model supports vision.
-    # Use the resolved runtime model_name from make_lead_agent to avoid stale config values.
-    model_config = resolved_app_config.get_model_config(model_name) if model_name else None
-    if model_config is not None and model_config.supports_vision:
+    # Add ViewImageMiddleware only for the NATIVE-vision path (main model
+    # ingests raw image data). In delegated mode the view_image tool already
+    # returns a text description and stores nothing in `viewed_images`, so the
+    # middleware would otherwise inject a spurious "No images have been viewed."
+    # message. Use the resolved runtime model_name to avoid stale config values.
+    from deerflow.models.vision import is_delegated_vision, vision_enabled
+
+    if vision_enabled(model_name, app_config=resolved_app_config) and not is_delegated_vision(app_config=resolved_app_config):
         middlewares.append(ViewImageMiddleware())
 
     # Add DeferredToolFilterMiddleware to hide deferred tool schemas from model binding

offline-backend-20260512/backend/packages/harness/deerflow/agents/middlewares/uploads_middleware.py

@@ -18,6 +18,12 @@ logger = logging.getLogger(__name__)
 
 _OUTLINE_PREVIEW_LINES = 5
 
+# Image files are understood via the `view_image` tool (which routes to the
+# configured vision model), never by reading their bytes. Listing them with the
+# generic read_file/grep guidance made the agent try to parse image binaries
+# with bash/python, which fails and wastes turns.
+_IMAGE_EXTENSIONS = {".jpg", ".jpeg", ".png", ".webp", ".gif", ".bmp"}
+
 
 def _extract_outline_for_file(file_path: Path) -> tuple[list[dict], list[str]]:
     """Return the document outline and fallback preview for *file_path*.
@@ -88,6 +94,16 @@ class UploadsMiddleware(AgentMiddleware[UploadsMiddlewareState]):
         size_str = f"{size_kb:.1f} KB" if size_kb < 1024 else f"{size_kb / 1024:.1f} MB"
         lines.append(f"- {file['filename']} ({size_str})")
         lines.append(f"  Path: {file['path']}")
+
+        # Images must be understood through the vision model, not by reading bytes.
+        extension = str(file.get("extension") or Path(file["filename"]).suffix).lower()
+        if extension in _IMAGE_EXTENSIONS:
+            lines.append(f"  This is an image. To understand it, call the `view_image` tool with image_path='{file['path']}' (optionally pass a `question`).")
+            lines.append("  The configured vision model will analyze it and return a description — trust that result.")
+            lines.append("  Do NOT read, open, or parse the image with read_file, grep, bash, python, PIL, or any byte-level inspection; those cannot interpret image content.")
+            lines.append("")
+            return
+
         outline = file.get("outline") or []
         if outline:
             truncated = outline[-1].get("truncated", False)

offline-backend-20260512/backend/packages/harness/deerflow/agents/middlewares/view_image_middleware.py

@@ -139,6 +139,12 @@ class ViewImageMiddleware(AgentMiddleware[ViewImageMiddlewareState]):
         if not messages:
             return False
 
+        # Nothing to inject when no image data was captured (e.g. delegated
+        # recognition handled the image in the tool and stored no base64).
+        # Avoids injecting a useless "No images have been viewed." message.
+        if not state.get("viewed_images"):
+            return False
+
         # Get the last assistant message
         last_assistant_msg = self._get_last_assistant_message(messages)
         if not last_assistant_msg:

offline-backend-20260512/backend/packages/harness/deerflow/config/app_config.py

@@ -32,6 +32,7 @@ from deerflow.config.title_config import TitleConfig, load_title_config_from_dic
 from deerflow.config.token_usage_config import TokenUsageConfig
 from deerflow.config.tool_config import ToolConfig, ToolGroupConfig
 from deerflow.config.tool_search_config import ToolSearchConfig, load_tool_search_config_from_dict
+from deerflow.config.vision_config import VisionConfig
 
 load_dotenv()
 
@@ -104,6 +105,7 @@ class AppConfig(BaseModel):
     log_level: str = Field(default="info", description="Logging level for deerflow and app modules (debug/info/warning/error); third-party libraries are not affected")
     token_usage: TokenUsageConfig = Field(default_factory=TokenUsageConfig, description="Token usage tracking configuration")
     models: list[ModelConfig] = Field(default_factory=list, description="Available models")
+    vision: VisionConfig = Field(default_factory=VisionConfig, description="Image recognition (识图) configuration")
     sandbox: SandboxConfig = Field(description="Sandbox configuration")
     tools: list[ToolConfig] = Field(default_factory=list, description="Available tools")
     tool_groups: list[ToolGroupConfig] = Field(default_factory=list, description="Available tool groups")

offline-backend-20260512/backend/packages/harness/deerflow/config/vision_config.py

@@ -0,0 +1,29 @@
+from pydantic import BaseModel, Field
+
+# Default instruction sent to the vision model when the agent does not provide a
+# more specific question. Kept in Chinese to match the product's primary locale.
+DEFAULT_VISION_PROMPT = "请仔细观察这张图片,尽可能详细、准确地描述其中的全部内容,包括文字、图表、物体、场景与布局等关键信息。"
+
+
+class VisionConfig(BaseModel):
+    """Configuration for image recognition (识图).
+
+    When ``model_name`` names a model from ``models[]``, the lead agent's
+    ``view_image`` tool delegates image understanding to that dedicated model
+    and returns a text description — so a text-only chat model can still "see"
+    uploaded images. When ``model_name`` is unset, vision falls back to the main
+    chat model, which only works when that model has ``supports_vision: true``.
+    """
+
+    model_name: str | None = Field(
+        default=None,
+        description="Name of the model (from models[]) used for image recognition. When unset, falls back to the main chat model if it supports vision.",
+    )
+    prompt: str = Field(
+        default=DEFAULT_VISION_PROMPT,
+        description="Default instruction for the vision model when no per-call question is given.",
+    )
+    max_tokens: int | None = Field(
+        default=None,
+        description="Optional override for the vision model's max output tokens; falls back to the model's own config when unset.",
+    )

offline-backend-20260512/backend/packages/harness/deerflow/models/__init__.py

@@ -1,3 +1,10 @@
 from .factory import create_chat_model
+from .vision import is_delegated_vision, recognize_image, resolve_vision_model_name, vision_enabled
 
-__all__ = ["create_chat_model"]
+__all__ = [
+    "create_chat_model",
+    "is_delegated_vision",
+    "recognize_image",
+    "resolve_vision_model_name",
+    "vision_enabled",
+]

offline-backend-20260512/backend/packages/harness/deerflow/models/vision.py

@@ -0,0 +1,121 @@
+"""Image recognition (识图) via a configurable vision model.
+
+When ``config.yaml`` defines ``vision.model_name``, the lead agent's
+``view_image`` tool delegates image understanding to that dedicated model and
+returns a text description — so a text-only chat model can still "see" uploaded
+images. When no dedicated model is configured, vision falls back to the main
+chat model, which only works when that model has ``supports_vision: true``.
+"""
+
+import logging
+
+from deerflow.config import get_app_config
+from deerflow.config.app_config import AppConfig
+from deerflow.config.vision_config import DEFAULT_VISION_PROMPT
+
+logger = logging.getLogger(__name__)
+
+
+def _configured_vision_model(config: AppConfig) -> str | None:
+    """Return a valid dedicated vision model name from config, or None."""
+    vision_cfg = getattr(config, "vision", None)
+    name = getattr(vision_cfg, "model_name", None) if vision_cfg else None
+    if not name:
+        return None
+    if config.get_model_config(name) is None:
+        logger.warning("vision.model_name %r is not defined in models[]; ignoring", name)
+        return None
+    return name
+
+
+def resolve_vision_model_name(model_name: str | None, *, app_config: AppConfig | None = None) -> str | None:
+    """Resolve which model should handle image recognition for this run.
+
+    Priority:
+    1. A dedicated ``vision.model_name`` configured in ``config.yaml``.
+    2. The main chat model, only if it declares ``supports_vision: true``.
+    3. ``None`` — vision is unavailable.
+    """
+    config = app_config or get_app_config()
+    configured = _configured_vision_model(config)
+    if configured:
+        return configured
+    if model_name:
+        mc = config.get_model_config(model_name)
+        if mc is not None and mc.supports_vision:
+            return model_name
+    return None
+
+
+def vision_enabled(model_name: str | None, *, app_config: AppConfig | None = None) -> bool:
+    """Whether the ``view_image`` tool/middleware should be available this run."""
+    return resolve_vision_model_name(model_name, app_config=app_config) is not None
+
+
+def is_delegated_vision(*, app_config: AppConfig | None = None) -> bool:
+    """Whether image recognition is delegated to a dedicated vision model.
+
+    True when ``vision.model_name`` is configured and valid — in that case
+    ``view_image`` calls the dedicated model and returns a text description
+    instead of injecting raw image data into the main chat model.
+    """
+    config = app_config or get_app_config()
+    return _configured_vision_model(config) is not None
+
+
+def _extract_text(message) -> str:
+    """Flatten an LLM response message into plain text."""
+    content = getattr(message, "content", message)
+    if isinstance(content, str):
+        return content.strip()
+    if isinstance(content, list):
+        parts: list[str] = []
+        for block in content:
+            if isinstance(block, str):
+                parts.append(block)
+            elif isinstance(block, dict) and block.get("type") == "text":
+                parts.append(str(block.get("text", "")))
+        return "\n".join(p for p in parts if p).strip()
+    return str(content).strip()
+
+
+def recognize_image(
+    image_base64: str,
+    mime_type: str,
+    *,
+    question: str | None = None,
+    app_config: AppConfig | None = None,
+) -> str:
+    """Describe/analyze an image using the configured dedicated vision model.
+
+    Returns the model's text answer. Raises ``ValueError`` if no dedicated
+    vision model is configured, and propagates model/network errors to the
+    caller for handling.
+    """
+    from langchain_core.messages import HumanMessage
+
+    from deerflow.models.factory import create_chat_model
+
+    config = app_config or get_app_config()
+    model_name = _configured_vision_model(config)
+    if model_name is None:
+        raise ValueError("No dedicated vision model is configured (vision.model_name).")
+
+    vision_cfg = getattr(config, "vision", None)
+    default_prompt = getattr(vision_cfg, "prompt", None) or DEFAULT_VISION_PROMPT
+    prompt = (question or "").strip() or default_prompt
+
+    extra: dict = {}
+    max_tokens = getattr(vision_cfg, "max_tokens", None) if vision_cfg else None
+    if max_tokens:
+        extra["max_tokens"] = max_tokens
+
+    model = create_chat_model(name=model_name, thinking_enabled=False, app_config=config, **extra)
+    message = HumanMessage(
+        content=[
+            {"type": "text", "text": prompt},
+            {"type": "image_url", "image_url": {"url": f"data:{mime_type};base64,{image_base64}"}},
+        ]
+    )
+    result = model.invoke([message])
+    return _extract_text(result)

offline-backend-20260512/backend/packages/harness/deerflow/tools/builtins/view_image_tool.py

@@ -51,20 +51,33 @@ def view_image_tool(
     runtime: ToolRuntime[ContextT, ThreadState],
     image_path: str,
     tool_call_id: Annotated[str, InjectedToolCallId],
+    question: str | None = None,
 ) -> Command:
-    """Read an image file.
+    """Read and understand an image file.
 
-    Use this tool to read an image file and make it available for display.
+    This is the ONLY correct way to understand an image. The image is analyzed by
+    the configured vision model and its description/answer is returned to you as
+    the tool result. Treat that result as authoritative.
 
     When to use the view_image tool:
-    - When you need to view an image file.
+    - Whenever you need to view, describe, or answer a question about an image file.
 
     When NOT to use the view_image tool:
     - For non-image files (use present_files instead)
     - For multiple files at once (use present_files instead)
 
+    IMPORTANT — do NOT attempt to understand images any other way:
+    - Never read, open, decode, or parse an image with read_file, grep, bash,
+      python, PIL/Pillow, OpenCV, EXIF parsing, or byte/hex inspection. Those
+      cannot interpret visual content and will only waste turns.
+    - If `view_image` returns a weak or incomplete description, do not fall back
+      to code. Either call `view_image` again with a more specific `question`,
+      or tell the user the configured vision model could not extract more detail
+      (the vision model may need to be changed in config).
+
     Args:
         image_path: Absolute /mnt/user-data virtual path to the image file. Common formats supported: jpg, jpeg, png, webp.
+        question: Optional specific question to ask about the image (e.g. "What is the total on this invoice?"). When omitted, a general detailed description is produced.
     """
     from deerflow.sandbox.exceptions import SandboxRuntimeError
     from deerflow.sandbox.tools import (
@@ -153,8 +166,27 @@ def view_image_tool(
     mime_type = detected_mime_type
     image_base64 = base64.b64encode(image_data).decode("utf-8")
 
-    # Update viewed_images in state
-    # The merge_viewed_images reducer will handle merging with existing images
+    # Delegated recognition: when a dedicated vision model is configured, send
+    # the image to that model and return its description as the tool result, so
+    # a text-only main chat model can still "see" the image.
+    from deerflow.models.vision import is_delegated_vision, recognize_image
+
+    if is_delegated_vision():
+        try:
+            description = recognize_image(image_base64, mime_type, question=question)
+        except Exception as e:  # noqa: BLE001 - surface as a recoverable tool error
+            return Command(
+                update={"messages": [ToolMessage(f"Error recognizing image: {_sanitize_image_error(e, thread_data)}", tool_call_id=tool_call_id)]},
+            )
+        if not description:
+            description = "The vision model returned an empty description."
+        return Command(
+            update={"messages": [ToolMessage(f"Image recognition result for {image_path}:\n\n{description}", tool_call_id=tool_call_id)]},
+        )
+
+    # Native vision: store the image so ViewImageMiddleware injects it into the
+    # (vision-capable) main model before the next LLM call.
+    # The merge_viewed_images reducer will handle merging with existing images.
     new_viewed_images = {image_path: {"base64": image_base64, "mime_type": mime_type}}
 
     return Command(

offline-backend-20260512/backend/packages/harness/deerflow/tools/tools.py

@@ -138,11 +138,14 @@ def get_available_tools(
     if model_name is None and config.models:
         model_name = config.models[0].name
 
-    # Add view_image_tool only if the model supports vision
-    model_config = config.get_model_config(model_name) if model_name else None
-    if model_config is not None and model_config.supports_vision:
+    # Add view_image_tool when vision is available — either the main model
+    # supports vision natively, or a dedicated vision model is configured
+    # (vision.model_name) so recognition can be delegated to it.
+    from deerflow.models.vision import vision_enabled
+
+    if vision_enabled(model_name, app_config=config):
         builtin_tools.append(view_image_tool)
-        logger.info(f"Including view_image_tool for model '{model_name}' (supports_vision=True)")
+        logger.info(f"Including view_image_tool for model '{model_name}' (vision available)")
 
     # Get cached MCP tools if enabled
     # NOTE: We use ExtensionsConfig.from_file() instead of config.extensions

offline-backend-20260512/backend/packages/harness/deerflow/uploads/manager.py

@@ -138,12 +138,21 @@ def open_upload_file_no_symlink(base_dir: Path, filename: str) -> tuple[Path, ob
 
     validate_path_traversal(dest, base_dir)
 
-    if not hasattr(os, "O_NOFOLLOW"):
-        raise UnsafeUploadPathError("Upload writes require O_NOFOLLOW support")
-
-    flags = os.O_WRONLY | os.O_CREAT | os.O_NOFOLLOW
+    # ``O_NOFOLLOW`` closes the TOCTOU window between the ``lstat`` above and the
+    # ``open`` below, but it is a POSIX-only flag — it does not exist on Windows
+    # (``os.O_NOFOLLOW`` is undefined there). Windows also lacks ``O_NONBLOCK``
+    # and needs ``O_BINARY`` to avoid CRLF translation on the raw fd. Where
+    # ``O_NOFOLLOW`` is unavailable we still reject pre-existing symlinks via the
+    # ``lstat`` check and re-verify the opened file with ``fstat`` below; the
+    # residual race only matters under a hostile local user, which is out of
+    # scope for the single-user local deployment this path targets.
+    flags = os.O_WRONLY | os.O_CREAT
+    if hasattr(os, "O_NOFOLLOW"):
+        flags |= os.O_NOFOLLOW
     if hasattr(os, "O_NONBLOCK"):
         flags |= os.O_NONBLOCK
+    if hasattr(os, "O_BINARY"):
+        flags |= os.O_BINARY
 
     try:
         fd = os.open(dest, flags, 0o600)

offline-backend-20260512/config.yaml

@@ -11,7 +11,7 @@ models:
   max_retries: 2
   max_tokens: 4096
   temperature: 1.0
-  supports_vision: true
+  supports_vision: false
   supports_thinking: true
 - name: zai-org/GLM-5-FP8
   display_name: zai-org/GLM-5-FP8
@@ -35,7 +35,7 @@ models:
   max_retries: 2
   max_tokens: 4096
   temperature: 1.0
-  supports_vision: true
+  supports_vision: false
   supports_thinking: true
 - name: minimax-m2.7
   display_name: MiniMax M2.7
@@ -57,6 +57,36 @@ models:
   temperature: 1.0
   supports_vision: true
   supports_thinking: true
+- name: deepseek-ai/DeepSeek-OCR
+  display_name: deepseek-ai/DeepSeek-OCR
+  use: langchain_openai:ChatOpenAI
+  model: deepseek-ai/DeepSeek-OCR
+  api_key: sk-beshfxfxfrllsczpqfrgjbugfbpzxgqgedbehceytpcvvtyb
+  base_url: https://api.siliconflow.cn/v1/
+  max_tokens: 4096
+  temperature: 1.0
+  supports_vision: true
+  supports_thinking: true
+# 识图(图片识别)配置。
+# - model_name:指定一个 models[] 中的模型名,作为“默认识图大模型”。view_image 工具会把
+#   图片交给该模型识别,并把识别出的文字结果返回给主对话模型 —— 这样即使主对话模型不支持
+#   视觉,也能“看图”。请改成你实际用于识图的模型名。
+# - 若留空 / 注释掉 model_name,则回退到主对话模型自身的视觉能力(需该模型 supports_vision: true)。
+# - prompt:不带具体问题时使用的默认识图指令(可选)。
+# - max_tokens:识图模型输出上限(可选,默认用该模型自身的配置)。
+vision:
+  model_name: deepseek-ai/DeepSeek-OCR
+  # prompt: 请详细描述这张图片的内容。
+  # max_tokens: 2048
+# 上传文件识别配置。
+# - auto_convert_documents: true 时,上传的 PDF / Word / Excel / PPT 会在服务端自动转换为
+#   Markdown(.md),agent 通过 read_file / grep 读取其内容 —— 即“识别”文档内容。
+#   纯文本类(txt / csv / md / json / 代码等)无需转换,agent 用 read_file 直接读取。
+#   图片(png/jpg/webp)由 view_image + 上面的 vision 识图模型处理。
+# - pdf_converter: auto(优先 pymupdf4llm,缺失时回退 markitdown)| pymupdf4llm | markitdown
+uploads:
+  auto_convert_documents: true
+  pdf_converter: auto
 tool_groups:
 - name: web
 - name: file:read