Function registerHost

runtime/worker/engine.js:125–142

(name, exportNames)

    /* Register a main-thread module at `mt:<name>`: push a stub per export (the real call defers to the page) and tell the compiler its export names. */
    const registerHost = (name, exportNames) => {
        const baseId = nativeTable.length;
        for (const fnName of exportNames) {
            const stub = () => {};
            stub.__edge_kind = 'capability';
            stub.__edge_main_thread = true;
            stub.__edge_name = fnName;
            stub.__edge_module = name;
            nativeTable.push(stub);
        }
        const specBytes = TE.encode(`mt:${name}`);
        const namesBytes = TE.encode(exportNames.join('\n'));
        exports.register_native_module(
            writeBytes(specBytes), specBytes.length,
            writeBytes(namesBytes), namesBytes.length,
            baseId,
        );
    };

    /* Both kinds graft `<name> -> mt:<name>` so the bare name resolves; eager ones (programmatic objects) register now, lazy ones (urls) load on first import during prefetch. In incremental mode the native table is preserved, so skip re-registration. */
    const mainThreadSpecs = new Set();