/**
 * Module resolution for a forked canvas extension.
 *
 * Design: `docs/canvas-extensions-design.md` §4.1. A canvas extension's only
 * external import is `@github/copilot-sdk/extension`, and GitHub's own
 * `docs/extensions.md` says that import "is resolved automatically — you don't
 * install it". So hoocode has to make the specifier resolvable inside the child
 * without writing anything into the extension directory: a catalog canvas must
 * stay byte-identical to upstream (tier 1 of the design's ownership split).
 *
 * The mechanism is a Node module-resolution hook (`node:module`'s `register`)
 * delivered entirely through `--import` **data: URLs**. Nothing is written to
 * disk and no `.mjs` asset has to be copied into `dist/` or embedded in the
 * packaged binary — the whole resolver is two generated modules that exist only
 * as command-line arguments.
 */
/** The specifier a canvas extension imports, and the package it belongs to. */
export declare const CANVAS_SDK_PACKAGE = "@github/copilot-sdk";
/**
 * Build the `--import` argument that makes `@github/copilot-sdk` resolve to
 * `shimUrl` inside the child.
 *
 * @param shimUrl Absolute `file:` URL of the module implementing the SDK surface.
 */
export declare function canvasResolverImportArg(shimUrl: string): string;
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