Name of the diagnostics_channel that ignore publishes to on Node and Deno — subscribe with the platform API, no qunitx registry involved. Messages are { context: string, error: unknown }. Browsers have no channel; use onIgnored.

import * as Failure from './failure.ts';
import diagnostics_channel from 'node:diagnostics_channel';

const seen: unknown[] = [];
const collect = (message: unknown) => seen.push(message);
diagnostics_channel.subscribe(Failure.IGNORED_CHANNEL_NAME, collect);
await Promise.reject(new Error('boom')).catch(Failure.ignore('cleanup'));
seen; // [{ context: 'cleanup', error: Error('boom') }]
diagnostics_channel.unsubscribe(Failure.IGNORED_CHANNEL_NAME, collect);