# dsh-tool-ddgs

DuckDuckGo web search and URL fetch tools for [DeepSeek Harness](https://github.com/deepseek-ai/deepseek-harness).

Zero required system dependencies — search is pure Node.js, fetch uses `@mozilla/readability` with optional `trafilatura` fallback for higher quality extraction.

## Install

```bash
dsh plugin --profile web add github:BharathBillawa/dsh-tool-ddgs
```

Then restart dsh. The bundle patch automatically:
- Registers `web_search` (DuckDuckGo Lite, pure Node)
- Registers `web_fetch` (content extraction, saves to file)
- Wires the native Search action to use ddgs
- Disables the built-in DeepSeek web search provider
- Enables the file read tool for accessing full fetched content

## Requirements

- Node.js >= 24 (required by DeepSeek Harness)
- **Optional**: Python 3.9+ with `pip install trafilatura` for better content extraction

## Tools

### `web_search`

Search the web using DuckDuckGo Lite. Pure Node.js — no Python, no subprocess, no API key.

- Accepts 1-4 queries
- Returns deduplicated sources with titles, URLs, and snippets
- Wired to the native Search action via `ctx.web` provider

### `web_fetch`

Fetch a URL and extract readable text content:

1. Downloads the page with browser-like headers
2. Extracts clean text using `trafilatura` (if available) or `@mozilla/readability`
3. Saves the **full content** to `/tmp/dsh-web-fetch/<url-slug>.md`
4. Returns a **5000-char preview** + the file path + total line count

If the preview answers the question, the model responds immediately. If more detail is needed, the model uses dsh's built-in `read` tool with `offset`/`limit` to read specific sections from the saved file — just like reading any local file.

This avoids dumping 100K+ chars into context for a simple question about one section of a long article.

## How it works

- **Search**: Direct POST to DuckDuckGo Lite + HTML regex parsing. No headless browser, no API key, no subprocess.
- **Fetch**: Node native `fetch()` → `@mozilla/readability` (DOM extraction via `linkedom`). Falls back to `trafilatura` via Python subprocess when available (better quality on complex pages).
- **File storage**: Full fetched content is saved to `/tmp/dsh-web-fetch/<url-slug>.md`

## Architecture

The plugin registers both:
- A **`ctx.web` search provider** (`id: "ddgs"`) — powers the native Search action in the agent loop
- **`web_search` and `web_fetch` tools** — directly callable by the model

## Configuration

The bundle patch configures itself. No manual `cordis.patch.yml` editing needed.

## License

MIT