/**
 * web_search tool for pi — Exa MCP search with DuckDuckGo fallback.
 *
 * web_fetch is handled by the npm:pi-smart-fetch package (TLS impersonation +
 * defuddle content extraction). This extension only provides search so it works
 * regardless of which model pi is currently routed to. Exa MCP and DDG both
 * require no API key for this use case.
 *
 * Why wreq-js: bare Node `fetch()` (even with a spoofed User-Agent header) gets
 * served DDG's anti-bot anomaly/captcha page (`cc=botnet`) because the TLS/HTTP2
 * fingerprint leaks "this is Node, not Chrome". wreq-js wraps native Rust
 * bindings that emulate real browser TLS/HTTP2 fingerprints, which is the same
 * primitive pi-smart-fetch uses for `web_fetch`.
 *
 * The upstream WebSearchTool in Claude Code is a thin wrapper around Anthropic's
 * first-party server-side `web_search_20250305` tool, gated to
 * firstParty/vertex/foundry providers running Claude. Pi often runs Kimi or other
 * non-Claude models, so that path is unavailable by definition.
 */
import type { ExtensionAPI } from '@earendil-works/pi-coding-agent';
export default function (pi: ExtensionAPI): void;
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