dsh-emacs-bridge

This is a two-way bridge between GNU Emacs and the Deepseek Harness (DSH). It lets you control DSH from Emacs, including submitting prompts, reading replies, and controlling sessions. The Emacs-side user interface is designed to closely follow Emacs conventions.

The bridge consists of two components:

• dsh-plugin/ — a DeepSeek Harness plugin (dsh-emacs-bridge).
• emacs/dsh-bridge.el — an Emacs package to interact with the harness. A companion library, dsh-bridge-install.el, is loaded on demand and provides commands to install/uninstall the DSH plugin.

Installation

Requirements

• dsh, the DeepSeek Harness.
• Node.js and pnpm to build the plugin.
• Emacs 29 or later.
• (Recommended) The markdown-mode Emacs package.

Emacs package

To build an Emacs package that also bundles the DSH plugin, run this in the repository's root directory:

make package

Then, in Emacs:

1. M-x package-install-file RET /path/to/dsh-bridge-<version>.tar RET
2. (optional) If you run DSH from a source checkout, so that dsh is not on the executable path or run via npx, customize dsh-bridge-dsh-command (e.g., M-x customize-variable RET dsh-bridge-dsh-command RET) to specify how to run DSH (see below).
3. M-x dsh-bridge-install-plugin
4. Start or restart dsh web

To remove the plugin later, run M-x dsh-bridge-uninstall-plugin.

Here is an example of dsh-bridge-dsh-command for a source checkout:

(setq dsh-bridge-dsh-command "pnpm -C /path/to/deepseek-harness dsh")

Note that ~ is not expanded, so specify the full path. Don't add an additional web argument to the end.

Manual compilation and installation

Instead of an all-in-one Emacs package, you can build and install the DSH plugin and Emacs library manually.

Build and install the DeepSeek Harness plugin

From this repository's root directory:

make build

If you have dsh installed on the executable path, run the following commands:

# from this repo root:
dsh plugin --profile web add link:./dsh-plugin
dsh web

If you have a source checkout of DSH and run it as a pnpm script (pnpm dsh web), run the following from the deepseek-harness directory instead, replacing the link: path with the appropriate path into this repo:

# from deepseek-harness root:
pnpm dsh plugin --profile web add link:/absolute/path/to/dsh-emacs-bridge/dsh-plugin
pnpm dsh web

Install the Emacs library

Put this in your Emacs init file (~/.emacs.d/init.el or ~/.emacs), replacing the path with the actual path to dsh-bridge.el:

(load "/path/to/dsh-emacs-bridge/emacs/dsh-bridge.el")

Optionally, you can also load dsh-bridge-install.el, which supplies the M-x dsh-bridge-install-plugin command (see above). If you installed the DSH plugin directly by following the steps in the preceding section, you can skip this.

Usage

From Emacs, the main entry-points are these two commands:

• M-x dsh-bridge — open a transient menu for DSH commands.
• M-x dsh-bridge-list-sessions — show a list of DSH sessions.

Consider giving either or both a global keybinding, e.g.,

(keymap-global-set "C-c d" #'dsh-bridge)

Transient menu

The M-x dsh-bridge command opens a transient menu that prompts for the next command. The menu's top line shows the session to be acted on (chosen based on your recent activity); you can cycle through available sessions with M-p/M-n. The following commands are available from here:

• q — exit the transient menu.
• M-p/M-n — cycle through other sessions, ordered by age.
• r — open a buffer to type in a prompt.
• f — fetch and display the latest set of replies.
• D — describe the session.
• t — pin the current session as the target.
• T — prompt for a session by title, and pin it.
• u — unpin the currently-pinned session.
• k — stop the running session.
• o — compact the session's context history.
• l — open the DSH-Sessions buffer.
• + — create a new session and pin it.
• p — toggle plan mode.
• G — set or edit the goal objective (with C-u, also the round cap).
• A — pause an armed goal, or resume and rearm a stopped one.
• X — clear the current goal.

DSH-Sessions buffer

The M-x dsh-bridge-list-sessions command opens a list of DSH sessions. The pinned target session (if any) is marked by a * in the leftmost column, and the S (state) column shows each session's live status. The following commands are available from here:

• q — quit the window and bury the buffer.
• RET — do the next appropriate thing for the session at point: if running, view current replies; if waiting for a prompt, open a prompt buffer; etc.
• r — open a buffer to type a prompt for the session at point.
• f — fetch and display the output from the session at point.
• a — answer a pending user query for the session at point.
• k — stop the session at point if it is running.
• o — compact the context history of the session at point.
• t — pin the session at point as the target. A cold session binds without being resumed; the host resumes it when a later request acts on it.
• u — unpin.
• v — toggle whether archived sessions are shown (hidden by default).
• R — rename the session at point.
• d — archive the session at point.
• U — unarchive the session at point.
• + — create a new session, in an existing or new workspace.
• W — rename the workspace of the session at point.
• D — describe the session at point.
• g — refresh the DSH-Sessions buffer.

For a full list, see the menu bar. Other tabulated-list-mode keys are also available.

DSH-View buffer

This read-only buffer contains the model output for a DSH session. Each buffer holds one agent turn (i.e., all replies from a user prompt to an idle). It is fetched by f from the transient menu or the DSH-Sessions buffer, C-c C-f from the prompt buffer, or pushed from the web UI's "Send to Emacs" button (see below).

The following commands are available in a DSH-View buffer:

• g — re-fetch the current session's newest turn.
• r — open a DSH-Prompt buffer for the current session.
• B — branch the shown turn into a new session.
• k — stop the shown session's running turn.
• o — compact the shown session's context history.
• i — receive the latest "Send to Emacs" message (see below).
• v — show or hide the turn's tool calls and thinking summaries.
• D — describe the current session.
• M-p/M-n — cycle the current session's turns.
• l — open the DSH-Sessions buffer.
• q — quit the window and bury the buffer.

When created, a DSH-View buffer usually follows the latest turn, automatically updated as more replies arrive. Walking back through older turns with M-p suspends following; cycling back to the newest turn with M-n resumes it automatically. To customize this behavior, change dsh-bridge-view-follow-at-newest.

If Markdown mode is installed, and dsh-bridge-view-gfm is non-nil, the replies are font-locked as GitHub-Flavored Markdown.

By default, a DSH-View buffer shows only the assistant's replies. Type v (dsh-bridge-view-toggle-activity) to toggle viewing other activity reports in the buffer, including tool calls, tool call results, and reasoning block summaries.

Agent queries and approval requests

If the model requests additional user input via the ask_user_question tool, the query is surfaced in the DSH-View buffer. Type a here (or in the DSH-Sessions buffer with point on the session) to open a buffer for handling the query. In the resulting buffer, navigate to each question block and mark your desired option with RET (or choose it with a number key), or type c to enter a custom answer. To submit the answers, type C-c C-c. Alternatively, type C-c C-k to decline the query.

Special approval requests from the model (e.g., for sandbox escalation) are also surfaced in the DSH-View buffer. Upon receiving such a request, type a to see the details in a help window; then you can type y to accept the request once, n to reject it, or c to cancel it. Quitting (C-g) leaves the approval pending; type a again to restart it.

If the web UI is open, the query or approval is shown there too. Whichever answers first, Emacs or web UI, settles the request and dismisses the other presentation. To change this (e.g., letting the web UI handle all requests), customize dsh-bridge-approval-answer.

DSH-Prompt buffer

The DSH-Prompt buffer is used to compose a prompt, or reply. It is opened by r from the transient menu, DSH-View buffer, or the DSH-Sessions buffer. You can also open it with RET from the DSH-Sessions, if the session is waiting for a prompt.

The target session is determined by how the buffer was invoked; for instance, r from a DSH-View buffer opens a prompt for the same session.

The following commands are available from the DSH-Prompt buffer:

• C-c C-c — send the prompt, and pop to a DSH-View buffer to see the reply.
• C-c C-a — attach a file to the prompt (see below).
• C-c C-m — set the model and reasoning effort.
• C-c C-s — rebind the buffer to another session.
• C-c C-k — stop the session if it is running, or erase the prompt otherwise.
• C-c C-o — compact the session's context history.
• C-c C-f — open the DSH-View buffer for this session.
• C-c C-l — open the DSH-Sessions buffer.
• M-p/M-n — walk the session's prompt history.

When Markdown mode is installed, this buffer derives from it, so most markdown editing commands are also available.

If the session is running when you invoke C-c C-c, the command asks how exactly to send the prompt; you queue it to run after the current turn, steer the running turn, or cancel. Customize dsh-bridge-send-while-running to change this behavior. To unconditionally steer, type C-u C-c C-c.

While walking the prompt history with M-p/M-n, you may edit earlier prompts. This blocks further history navigation; to resume, you must send the prompt first, or revert with M-x revert-buffer.

Attachments

From the DSH-Prompt buffer, type C-c C-a to attache a file to send along with the prompt. This prompts for a file in the minibuffer, and inserts a tag line into the prompt buffer:

<#attachment filename="/home/you/screenshot.png">

If you change your mind and no longer want to attach the file, just delete the tag line before sending.

From elsewhere in Emacs, you can also run M-x dsh-bridge-attach-file directly to open a DSH-Prompt buffer with the specified attachment, or M-x dsh-bridge-attach-buffer-file to open a prompt with the current buffer's file as the attachment.

Plan mode and goals

You can toggle plan mode, or set a session goal, with these commands:

• M-x dsh-bridge-toggle-plan-mode — toggle plan mode. With a numeric prefix argument, enable it if positive, disable otherwise.
• M-x dsh-bridge-set-goal — set or edit the goal objective. With a prefix argument, also read the goal round cap.
• M-x dsh-bridge-toggle-goal — pause or resume goal.
• M-x dsh-bridge-pause-goal — pause an active goal.
• M-x dsh-bridge-resume-goal — resume a paused or blocked goal.
• M-x dsh-bridge-clear-goal — clear the current goal.

These commands are also available in the menu bar.

Sending text from DSH to Emacs

The DSH plugin adds a "Send to Emacs" button that lets you push specific assistant messages to Emacs. This automatically pops to the DSH-View buffer in Emacs. You can use i in the DSH-View buffer (or run M-x dsh-bridge-receive) to pull the last message pushed.

Permissions, authentication, and failure bounds

The bridge listens on the DSH web server's loopback interface and never contacts a third-party service. Every route is gated by a shared bearer token, generated on first use and stored with owner-only permissions at ~/.dsh/dsh-bridge-token. Emacs reads that file directly, and the browser plugin fetches it from a route fenced to loopback peers and same-origin pages. Any third party with access to the token can do everything this Emacs package can: send prompts, read session logs, answer queries and approval requests, interrupt running turns, etc. Approvals submitted via this route grant no authority the web UI could not grant.

Request bodies are capped at 1 MiB, and messages waiting for Emacs sit in a bounded outbox that evicts the oldest entries (with a warning). The turn activity reporter, /turns, carries at most 60 of the latest activity entries per turn, and activity for at most the newest 40 turns. At present, reasoning activity is only shown as one-line summaries, with the full text staying in DSH.

License

This software is released under the terms of the GNU General Public License version 3, or later. See COPYING.