Web Context Interface

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Getting started ​

WCI (Web Context Interface) is an open standard and TypeScript SDK for annotating web pages, distilling them for LLM context, and dispatching typed browser actions.

Prerequisites ​

  • Node.js 18+
  • A browser environment (Bridge and Distiller run in the DOM; Context uses fetch)

Install ​

From this repository (development):

bash
git clone <your-repo-url>
cd WIA_framework
npm install
npm run build

When published to npm:

bash
npm install @webcontextinterface/core
# or install packages individually:
# npm install @webcontextinterface/spec @webcontextinterface/distiller @webcontextinterface/bridge @webcontextinterface/context

1. Annotate your HTML ​

Add data-wci-* attributes to elements agents should see or control:

html
<input
  data-wci-id="email-input"
  data-wci-role="form"
  data-wci-desc="User email — must be unique"
  data-wci-action="fill"
  data-wci-required="true"
  data-wci-state='{"value":"","valid":null}'
  data-wci-scope="registration-form"
  data-wci-priority="1"
/>

See Specification for the full attribute list.

2. Distil the page for an LLM ​

typescript
import { WciDistiller } from '@webcontextinterface/distiller';

const distiller = new WciDistiller({
  format: 'json',
  scope: 'registration-form',
  maxNodes: 64,
});

const view = distiller.distil(document);
// Pass to your LLM as tool context or system-adjacent user message
const json = distiller.distilJSON(document);

3. Dispatch actions from agent decisions ​

typescript
import { WciBridge } from '@webcontextinterface/bridge';
import { WciContextLoader } from '@webcontextinterface/context';

const ctx = await WciContextLoader.load(window.location.origin);
const bridge = new WciBridge(document.getElementById('registration-form')!);
bridge.setPolicy(ctx.policy);

const fillResult = await bridge.fill('email-input', 'user@example.com');
if (!fillResult.success) {
  console.error(fillResult.error);
}

await bridge.click('submit-btn');
console.log(bridge.getHistory());

4. Load site-wide context ​

Place these at your site root (see Site policy):

  • /wci.txt — allow/deny scopes, rate limits, auth
  • /wci.json — structured manifest and task flows
  • /wci.md — narrative for the LLM system prompt
typescript
import { WciContextLoader } from '@webcontextinterface/context';

const ctx = await WciContextLoader.load('https://your-site.com');
bridge.setPolicy(ctx.policy);
const systemPrompt = ctx.narrative ?? '';

5. All-in-one SDK import ​

typescript
import {
  WciDistiller,
  WciBridge,
  WciContextLoader,
  readWciNodeSpec,
} from '@webcontextinterface/core';

Run the demo ​

bash
npm run demo

Opens the interactive showcase at http://localhost:5173 with live distillation, action log, and site context viewer.

Next steps ​