dsh-file-upload ⬆️

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One upload button + drag-and-drop files straight into the conversation — a plugin for DeepSeek Harness (dsh) web.

Unofficial project: independently developed and maintained by a community member, not an official DeepSeek product.

Screenshot

The upload icon button in the composer tool row (official DSH design tokens, follows dark/light theme); either the file's path is inserted into the input box, or — for supported images — the image lands in the official attachment rail (auto file_id reuse).

Features

• Single-file limit: 64 MB (DeepSeek Files API hard limit; the local attachment store defaults to 20 MB — see Large images below)
• Everything lands in the attachment library: ~/Documents/DSH/Attachments/images/<YYYY-MM-DD>/ (images) or .../files/<YYYY-MM-DD>/ (other files) — configurable in Settings
• Button shows busy state while uploading; failures surface as Chinese notices

Settings card

• Attachment directory (~/Documents/DSH/Attachments default, ~ supported) — only used for image archives
• Path prefix ([上传文件] default) — text prepended to paths in the draft; clear it to send bare paths
• Images via official attachment (default on) — off = images follow the old path-text logic
• Archive images to the attachment directory (default on) — off = official attachment only (saves disk; if the official channel is unavailable, the image is still force-archived)
• Allow public uploads (default off) — off = same-origin check keeps allowing localhost only (CSRF-safe); on = any origin may upload, for public/port-forwarding access (e.g. ddnsto). Enable only if you trust everyone who can reach your DSH.
• Read-only display: current image size limit from the host

Large images (20–64 MB)

DeepSeek accepts up to 64 MB per image. DSH's local attachment store defaults to 20 MB; images above that (and ≤64 MB) are archived + path-text referenced (the model can still read them via read_image, which follows the same store limit).

To let large images through the official attachment path too, add this to ~/.dsh/profiles/web/cordis.patch.yml and restart dsh web:

- id: attachment-local
  config:
    maxImageBytes: 67108864   # 20 MiB → 64 MiB (DeepSeek hard limit)

Note: the whole config row is replaced, so keep every key you need; re-check against the DSH version after upgrades. The model always sees the harness-normalized version (≤2048px / ≤4 MiB, ≤384 tokens per image) regardless of the original size.

Install

Official bundle install (one line):

dsh plugin --profile web add "github:a903067276-rgb/dsh-file-upload#main"

Restart dsh web (bundle layers are composed at startup). Requires pnpm on PATH (dsh plugin forwards to pnpm).

Manual mount (fallback): see docs/install.md — symlink into ~/.dsh/profiles/web/node_modules/ plus a single entry in ~/.dsh/cordis.patch.yml (a double entry makes the plugin apply twice and crash on duplicate route registration), then restart.

Usage

1. Click the upload icon and pick files (multi-select), or drag files/folders anywhere into the window.
2. Images (when the current model accepts images): archived to the attachment directory and shown in the official attachment rail — send, and the model sees the image (DeepSeek Files API file_id, auto-reused).
3. Images when the model does not accept images (or you turned the official path off): archived to images/, then <prefix> <absolute path> lines go into the draft — e.g. [上传文件] /path/to/Attachments/images/xxx.png — and your existing draft text is kept.
4. Other files: archived to files/, path text goes into the draft. Press send; the model reads the file by path.
5. Folders: drag one in and it is rebuilt under the attachment library with its original layout; only the folder path (one line) goes into the draft.

Platform support

Requirements

• DSH web >= 0.1.0-rc.7 (run with dsh web)
• Version compatibility (best effort — new features verified locally on 0.1.1-rc.2; on 0.1.0-rc.7/rc.8 the official image rail can't be fully checked, not guaranteed):
• Maintenance policy: this plugin keeps evolving with the latest DSH releases; compatibility with older DSH versions is best-effort only and not guaranteed going forward.

• No extra shell needed: the host half is pure Node (node:fs), no system commands required on any platform.

How it works

• Host (lib/index.js): POST /api/file-upload/save — validates the session and size, writes the base64 payload to <library>/images/<YYYY-MM-DD>/ (mode=image) or <library>/files/<YYYY-MM-DD>/ (mode=file) with pure Node; POST /api/file-upload/save-folder — takes a relative-path + base64 list and rebuilds the tree under <library>/files/<date>/<timestamp>-<folder>/ (each segment sanitized, .. rejected to prevent traversal); GET/POST /api/file-upload/config reads/writes the settings (official settings service) and exposes the host image limit plus whether the current session's model accepts images (llm.resolveModel inputModalities — same source the adapter uses).
• Client (lib/client.js): registers the upload icon in the conversation.input.left seat; capture-phase document listener takes over file drags and reads dragged folders via webkitGetAsEntry; routing: supported image + official on + model supports + within host limit → archive + conversation.createDraftImages + inputActions.addImages (the official InputBar's own mechanism) → official attachment rail (no path text); anything else degrades to archive + path text; >64 MB is refused with a notice.
• Error boundary: a render crash degrades to a small "⚠ upload component error" chip instead of unmounting the whole composer.

Notes

• The attachment library only grows; it is never cleaned automatically (we don't delete your files) — remove files manually when needed.
• After modifying the plugin, restart dsh web for changes to take effect (client-side edits apply on a page refresh; host edits need a restart).

Why this plugin exists

DSH natively rejects dragged-in images when the current model doesn't support them. This plugin routes images through the official attachment path when the model can see them (so they ride the DeepSeek Files API with file_id reuse), keeps a user-accessible archive copy you can find later, and falls back to plain path text otherwise — a plain-text message that passes the model's image check and works with any model or vision plugin (it bypasses DSH's native image rejection because no image block is ever submitted on the fallback path).

License

MIT