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 @wesleyfan/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 @wesleyfan/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, 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.

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 shows the plugin's browser sessions in a floating panel. If your profile provides the dsh-better-sidebar integration, the view appears in a Browser Skill sidebar tab instead.

• 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 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 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 @wesleyfan/browser-skill-dsh-plugin typecheck
pnpm --filter @wesleyfan/browser-skill-dsh-plugin test     # unit tests mock bsk; no browser needed
pnpm --filter @wesleyfan/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.

1. Commit this README and any other changes intended for the release.

2. 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>
   

3. 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