dsh-paste-preview
简体中文
A DeepSeek Harness (dsh) web plugin that makes pasted images usable with text-only models, without losing the visual preview.
What it does
- Paste → thumbnail. Pasting an image into the composer shows a thumbnail in the attachment rail (click to zoom) instead of inserting a file path.
- Text-only models still get the image. When the selected model does not accept image input, the image is re-wrapped as a plain file attachment. dsh stores it and hands the model a read-only path, so tools such as
modlens_read_image can read it. Vision-capable models keep dsh's native image path.
- Thumbnails in sent messages. Images that went through the file path render as zoomable thumbnails in the conversation history, including after a reload.
- Drag-and-drop and images added from the file picker are rerouted the same way.
Install
dsh plugin add dsh-paste-preview
Restart dsh afterwards.
Using it together with @liustack/modlens
modlens has its own paste-to-path feature that intercepts pastes first. Turn it off in your profile's cordis.patch.yml:
- id: modlens
config:
pasteToPath: false
This is not shipped in the plugin's own patch on purpose: a patch that targets a missing entry id makes dsh fail at startup for anyone without modlens.
How it decides
The browser asks GET /dsh-paste-preview/verdict?model=<selector label>. The host answers takeover: true only when every model whose name or id appears in the label declares text-only input. modlens' own "(modlens vision)" wrappers are ignored so they cannot veto the model they wrap. Unknown or unresolvable models answer false, which keeps the native behaviour.
HTTP routes
| Route | Purpose |
|---|
GET /dsh-paste-preview/verdict | Whether pastes for the current model should be rerouted |
GET /dsh-paste-preview/file | Reads back a stored image attachment for thumbnails (sha256 id, png/jpg/webp/gif only, ≤ 32 MB) |
GET /dsh-paste-preview/debug | Lists providers, models and their input modalities |
All routes go through dsh's connection.requestRejection check and answer 401 to unauthenticated requests. Stored files are read through the dsh attachment store, which re-verifies the name, size and digest.
Limitations
- Sent-message thumbnails are attached to dsh's built-in file cards, which expose no public slot. The attachment reference is read from the rendered component's props. If a future dsh release changes that structure, the plain file card is shown instead; nothing breaks.
- Right after sending, before the message is persisted, the plain card may show briefly.
Development
pnpm install
pnpm test
License
MIT
