dsh-webbridge — Model tools that drive your REAL browser via Kimi WebBridge

Install: dsh plugin --profile web add github:bill9109/dsh-webbridge

A DeepSeek Harness host plugin: it bridges Kimi WebBridge's local daemon into eleven webbridge_* model tools, so the model operates your own browser — logins, cookies, and already-open tabs included — instead of a headless one.

English | 中文

Why this exists

When a model task has to touch a real website — a page behind your login, carrying your session and your already-open tabs — a headless browser cannot help: it holds none of your state and would ask you to authenticate all over again. dsh-webbridge exists to hand the model control of your real browser while keeping that browser state strictly on your machine, never inside a model request.

It ships no browser-driving code of its own: the actual work is done by the Kimi WebBridge daemon and browser extension. This plugin only translates that capability into model-facing tools on the DSH side.

Features

• Real browser, not headless: logins, cookies, and live sessions preserved
• Eleven model tools: navigate / find_tab / snapshot / click / fill /
  evaluate / screenshot / list_tabs / network / close_tab / close_session
• One task = one tab group: a session name groups tabs, keeping tasks
  cleanly isolated
• Local-first: the daemon runs on your machine; browser state never leaves it
• No KV-cache burden: browser state lives outside the model request

Usage

Prerequisites (required!)

This plugin is an adapter — without the pieces below, browser control does
not work. You must install Kimi WebBridge separately (an independent product
by Moonshot AI; this plugin contains none of its code). Full install and
browser-extension setup instructions live on Kimi's official pages:
feature page /
help center.
In short:

# 1. Install the daemon:
curl -fsSL https://cdn.kimi.com/webbridge/install.sh | bash

# 2. Install the Kimi WebBridge browser extension and let it connect to the
#    daemon (search "Kimi WebBridge" in the Chrome Web Store), then check:
kimi-webbridge status   # expect "extension_connected": true

If the daemon is not running, tools fail loud with a daemon_unreachable
error that tells you to run ~/.kimi-webbridge/bin/kimi-webbridge start.

Model experience

Tool	Purpose
webbridge_navigate	Open a URL (new tab or current), set the tab group label
webbridge_find_tab	Re-select a tab this task opened, or borrow the user's active tab
webbridge_snapshot	Read the page's accessibility tree (text + @e refs)
webbridge_click	Click an element by @e ref or CSS selector
webbridge_fill	Type into inputs / textareas / contenteditable editors
webbridge_evaluate	Run JS in the page (async supported)
webbridge_screenshot	Capture the page or one element to a file path
webbridge_list_tabs	List the tabs opened in the session
webbridge_network	Inspect network activity (start/stop/list/detail)
webbridge_close_tab	Close the current tab of the session
webbridge_close_session	Close ALL tabs of the session (clears the tab group)

Session and closing rules (model contract)

These rules come from the upstream Kimi WebBridge skill and are part of the
model contract:

• One task = one session = one tab group. Pick a session name at the
  task's start and keep it on EVERY call — never switch mid-task.
• Name it after the task, not the site (camping-research, not
  kimi.com).
• group_title is the human-readable group label, set on the FIRST
  navigate of the task, written in the user's language.
• Closing is always user-initiated. Call webbridge_close_session ONLY
  when the user explicitly asks to close/clear the tabs; never close tabs
  automatically at the end of a task.

Configuration

The daemon address defaults to http://127.0.0.1:10086. The plugin accepts
no configuration today; the baseUrl seam exists for tests.

Install

The plugin is a DSH bundle (package.json declares dsh.bundle, and
cordis.patch.yml carries the patch). Install it into the web profile
with the standard dsh plugin mechanism — no DSH source changes and no
hand-written patch:

dsh plugin --profile web add github:bill9109/dsh-webbridge

For a stable install, pin the version:
dsh plugin --profile web add github:bill9109/dsh-webbridge#v0.0.2.

Internally the command runs pnpm add <spec> in the profile directory and
automatically appends packages that declare dsh.bundle to
dsh.profile.bundles. You can also clone it and install from a local path
(for development):

dsh plugin --profile web add /path/to/dsh-webbridge

The repository ships its build output (lib/), so the plugin works right
after installing — no build step needed. After installing, restart the Web
UI (production mode has no hot reload) and refresh the page — the
webbridge_* tools become available to the model.

Upgrade

dsh plugin --profile web update github:bill9109/dsh-webbridge

For a local-path installation, run add again against the replacement
checkout, then restart the Web UI and refresh.

Uninstall

dsh plugin --profile web remove @bill9109/dsh-webbridge

The command runs pnpm remove <pkg> in the profile directory and removes
the package from dsh.profile.bundles. After uninstalling, restart web and
refresh — the DSH built-in plugin (same row id webbridge) takes over again.

Relationship to the DSH built-in

DSH's official dsh-web-app bundle ships a built-in plugin of the same
nature (@deepseek-ai/dsh-webbridge, row id webbridge). This repository
is the independent open-source edition, distributed as
@bill9109/dsh-webbridge: installing it overrides the built-in by the
same row id and uses this package's code; without it, the built-in applies.
The tools behave identically — same protocol layer — the difference is only
who maintains the package.

Troubleshooting

Symptom	Resolution
Tools fail with daemon_unreachable	The Kimi WebBridge daemon is not running — start it with ~/.kimi-webbridge/bin/kimi-webbridge start, then confirm with kimi-webbridge status
kimi-webbridge status shows "extension_connected": false	Install the Kimi WebBridge browser extension (Chrome Web Store) and let it connect to the daemon; restart the browser if it still shows disconnected
webbridge_* tools not visible to the model after install	The Web UI must be restarted and the page refreshed (production mode has no hot reload); verify the bundle row is in the profile (dsh --profile web --dump-config | grep webbridge)
Clicks / fills ignored on some sites	Sites that strictly check event.isTrusted (banking portals, captchas) ignore synthetic events; the daemon's cdp escape hatch is not exposed as a tool yet
Snapshot / click / fill / evaluate miss an iframe	Cross-origin iframes are not supported — these tools operate on the top frame only
Screenshots return a path but no image	The daemon writes to a temporary path and returns the path; use a Read tool to view the image
Tab groups suddenly empty	Tab groups are maintained by the daemon; restarting the daemon clears them — recreate the session

Repository specifics

How it works

model ── webbridge_* tools ──▶ dsh-webbridge plugin
                                   │ POST /command
                                   ▼
                         kimi-webbridge daemon (127.0.0.1:10086)
                                   │
                                   ▼
                         WebBridge browser extension
                                   │
                                   ▼
                         user's REAL browser (with logins)

Every tool call is one HTTP round-trip to the local daemon. The returned
payload is folded into a compact one-line summary plus the raw detail.

Directory structure

dsh-webbridge/
├── src/               # plugin source: index.ts (registration), tools.ts (the 11
│                      #   webbridge_* tools), client.ts (HTTP client), invariant.ts
├── lib/               # committed build output (tsc types + tsdown bundle) — git
│                      #   installs consume this directly
├── tests/             # client.spec.ts — unit tests against a mock HTTP daemon
├── scripts/           # build.mjs (bundle build), verify-i18n.mjs (bilingual check)
├── cordis.patch.yml   # the DSH bundle patch — row id `webbridge` (overrides built-in)
├── README.md          # English main readme
├── README.zh.md       # Chinese readme
└── package.json

Known limitations

• event.isTrusted — sites that strictly check trusted input (some banking
  portals, captchas) ignore synthetic click/fill; the daemon's cdp
  escape hatch is not exposed as a tool yet
• Cross-origin iframes — snapshot/click/fill/evaluate operate on the top
  frame only
• Screenshots — the daemon writes to a temp path and returns the path; the
  model must use a Read tool to view the image
• Daemon lifecycle — tab groups are maintained by the daemon; restarting
  the daemon clears them

Development and verification

pnpm install
DSH_CHECKOUT=/path/to/dsh pnpm run build   # tsc → lib/types, tsdown → lib/index.js

Peer dependencies and the toolchain come from DSH: set DSH_CHECKOUT to a
source checkout, or have dsh on PATH and run it once. lib/ is
committed, so git installs consume the built artifacts directly — no build
needed. Unit tests (tests/client.spec.ts) run against a mock HTTP daemon,
so no real Kimi install is required; run them in an environment with vitest
(e.g. the DSH checkout), and set KIMI_WEBBRIDGE_IT=1 to run the integration
tests against a live daemon.

Keep the bilingual README in sync: edit both README.md and
README.zh.md, then run node scripts/verify-i18n.mjs --write.

Community and About

• Use GitHub Issues for
  reproducible bugs, focused feature requests, and usage questions.
• Read CONTRIBUTING.md before proposing changes; report
  vulnerabilities privately via SECURITY.md.
• Follow releases and compatibility notes in CHANGELOG.md.
• Acknowledgements & trademarks: this plugin's protocol layer is
  compatible with Kimi WebBridge. Kimi WebBridge is a
  product and trademark of Moonshot AI; its daemon, browser extension, and
  their code belong to Moonshot AI and must be installed and used under Kimi's
  own terms. This plugin is an HTTP-protocol adapter only and contains none of
  that code.

License

BSD-3-Clause. See LICENSE.