BrowserSkill for DeepSeek Harness
Use BrowserSkill in
DeepSeek Harness (dsh) to browse
websites, fill forms, and capture screenshots through native browser_* tools.
Browser tasks run in Agent Windows, with a live view in the dsh Web UI.
Installation
Before installing the plugin:
- Install DeepSeek Harness and
pnpm, which dsh uses to manage plugins.
- Install the
bsk CLI and connect the BrowserSkill extension in Chrome or Edge.
Follow the BrowserSkill setup guide.
- Make sure
bsk is on the PATH used to start dsh, or set bskPath in the plugin configuration.
Install the plugin into the web profile, then start it:
dsh plugin --profile web add @wxg-prc-cpg/browser-skill-dsh-plugin
dsh --profile web
Replace web with your profile name if you use a different profile. The plugin
includes the browser-skill skill; no separate bsk install-skill step is needed.
In a conversation, try:
/browser-skill open example.com and summarize the page.
By default, the browser tools become available when the skill is invoked.
Updating
Installed plugins do not update automatically. To upgrade this plugin to npm's
latest version, including versions outside the profile's saved dependency range:
dsh plugin --profile web update @wxg-prc-cpg/browser-skill-dsh-plugin --latest
Restart that dsh profile after upgrading. This command updates the plugin; update
the bsk CLI and browser extension separately when a release requires it.
Tools
| Tool | Actions | Purpose |
|---|
browser_session | start, stop, list | Manage plugin-owned Agent Window sessions. |
browser_page | navigate, back, forward, reload, wait | Navigate the active tab and wait for page lifecycle events. |
browser_inspect | observe, snapshot, html, screenshot, console, network | Read semantic or diagnostic page state and capture screenshots. |
browser_interact | click, hover, wheel, scroll-to, focus, blur, fill, select, press | Interact with controls using fresh refs or selectors. |
browser_tabs | list, create, select, close, borrow, return | Manage Agent Window tabs and temporarily borrow user tabs. |
browser_assist | resize, emulate, request-help | Resize or emulate the browser and pause for human-only steps. |
For native wheel input (action: "wheel"), see the wheel reference
for signed deltas, optional targets, result semantics and interruption.
For browser_interact with action: "scroll-to", see the
scroll-to reference for parameters, visible bounds and errors.
Arbitrary page-script evaluation and interaction recording are not supported.
Multi-session model
One agent conversation can drive several browser sessions at once:
browser_session with action: start returns the session id and makes it the current session.- Every operation tool accepts an optional
session argument. When omitted, the call acts on the
current session (the one most recently started or used); when given, that session becomes current.
- Every tool result echoes the session it actually acted on, so the model never has to guess.
- The number of concurrent sessions started through the plugin is capped (
maxSessions, default 5).
- Unloading the plugin stops every session it started and kills in-flight bsk processes.
Ownership boundary: the bsk daemon may be shared with other agents, terminals, or dsh
instances. The plugin therefore only ever sees and operates on sessions it created itself —
an explicit session argument naming a foreign or unknown id is rejected, the list action on
browser_session shows plugin-created sessions only (no daemon-wide view), and stop/unload cleanup
can never touch a session owned by another program.
Configuration
After installing the plugin, edit your profile's cordis.patch.yml. For the web
profile, the default location is ~/.dsh/profiles/web/cordis.patch.yml. If you set
DSH_HOME, use $DSH_HOME/profiles/web/cordis.patch.yml instead. Replace web with
your profile name as needed.
If the file contains only comments and [], keep the comments and replace []
with the YAML below. If it already contains patch entries, add this entry to the
existing list or edit its existing id: browserskill entry. Keep a single
top-level YAML list. This overrides the plugin registered by the installed bundle:
- id: browserskill
config:
bskPath: bsk
defaultTimeoutMs: 120000
maxSessions: 5
observationEnabled: true
thumbnailIntervalMs: 1500
idleIntervalMs: 8000
lazyTools: true
Change bskPath to the full path of your CLI binary if it is not on dsh's PATH.
A patch replaces the entry's entire config object, so keep all overrides you need
together in that object.
Configuration changes follow dsh.profile.patchReload in the profile's
package.json: live (the default for web) applies changes when you save the
patch file; startup requires restarting the profile. Restart after upgrading
the plugin in either case.
All fields are optional; omitted fields use the defaults below:
| Option | Default | Purpose |
|---|
bskPath | bsk | Path to the CLI binary. |
defaultTimeoutMs | 120000 | Default command timeout in milliseconds. |
maxSessions | 5 | Maximum concurrent sessions started by this plugin. |
observationEnabled | true | Enable live browser observation. |
thumbnailIntervalMs | 1500 | Screenshot interval for active sessions, in milliseconds. |
idleIntervalMs | 8000 | Screenshot interval for idle sessions and the recent-activity window, in milliseconds. |
lazyTools | true | Reveal the browser tools when the skill is invoked. Set false to register them at startup. |
With lazyTools: true, only the skill's catalog entry is initially advertised to
the model. The six browser_* tool schemas are added to the system prompt after
the browser-skill skill is successfully invoked, either by the model or through
/browser-skill. Set lazyTools: false to make the tools available immediately.
Live browser view
The dsh Web UI prefers a Browser Skill tab in DSH's native right sidebar.
The native tab opens when the current conversation first has a browser session;
ordinary screenshot and action updates do not switch tabs or reopen a tab you
closed. You can reopen it from the sidebar's guide.
The native sidebar is optional. Profiles without its services use a floating
panel, and a failed native integration falls back to that panel. No
dsh-better-sidebar installation is required; it can coexist with BrowserSkill,
which registers directly with DSH rather than with the third-party sidebar.
- See the current action, elapsed time, and recent screenshot for each session.
- Select a session to focus on it. The sidebar view follows the current conversation.
- Use Use floating view to move observation into a floating panel, and
Move to sidebar (or Show here in the tab) to return. This choice lasts
only until the page reloads; it is not saved in your profile or browser storage.
- Use Interrupt to cancel the current browser command. The agent may continue
with another action afterward.
- Drag or resize the floating panel, or use Pop out to open a Picture-in-Picture
window in browsers that support it.
- Periodic screenshots are requested while a browser observation view is visible.
Configure the active and idle intervals with the options above.
The floating panel shows all browser sessions managed by this plugin instance;
the native tab shows the current conversation's browsers and those of its subagents.
The observation endpoints require a loopback address such as localhost or
127.0.0.1. Access through a LAN hostname or non-loopback reverse proxy is not supported.
Development
pnpm install
pnpm --filter @wxg-prc-cpg/browser-skill-dsh-plugin typecheck
pnpm --filter @wxg-prc-cpg/browser-skill-dsh-plugin test # unit tests mock bsk; no browser needed
pnpm --filter @wxg-prc-cpg/browser-skill-dsh-plugin build # tsdown -> lib/
See the development notes
for skill registration, tool results, and observation APIs in the current source.
Publishing
The Release dsh plugin workflow
publishes the package and this README to npm. Pushing a dsh-plugin-vX.Y.Z tag
triggers it; ordinary commits to main do not.
-
Commit this README and any other changes intended for the release.
-
From the repository root, run the
release script
with a new stable version, replacing <version> below. The script updates the
CLI, extension, and DSH plugin versions, commits the version changes, and creates
their release tags:
node scripts/release.mjs <version>
-
Push the version commit to the release branch, then push the DSH plugin tag
created by the script, using the same <version>:
git push origin HEAD
git push origin dsh-plugin-v<version>
This publishes the DSH plugin. Push the CLI and extension tags separately when
those components are ready for release.
The workflow checks the version, runs typechecks and tests, builds the package,
and publishes it to npm.
You can also run the workflow manually from GitHub Actions on the intended release
ref. Both triggers require an unpublished version and the NPM_TOKEN secret in the
npm-publish GitHub Environment.
npm updates the package README only when a new version is published, including
for documentation-only changes. Published versions cannot be overwritten. See
npm's README update rules.
License
MIT
