Archify Diagram Viewer 0.1.0

VS Code extension that previews Archify diagrams from their JSON sources
(live, as you type) and opens rendered Archify HTML in a viewer tab.
Bundles the Archify 3.0.1 renderer and runs it on VS Code's Node runtime.
Adds validation diagnostics, JSON schema help, source-link navigation,
export saving, render-to-file and open-in-browser commands.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

vendor/archify/scripts/delivery-update-child.mjs

@@ -0,0 +1,23 @@
+#!/usr/bin/env node
+
+import { checkForUpdate } from './check-update.mjs';
+
+// The parent can be busy in synchronous renderer work. Enforce its original
+// deadline here, in a separate event loop, so cache work cannot continue late.
+if (!/^\d{1,30}$/.test(process.argv[2] || '')) process.exit(1);
+const deadlineAt = BigInt(process.argv[2]);
+const remainingMs = Number(deadlineAt - process.hrtime.bigint()) / 1_000_000;
+if (remainingMs <= 0) process.exit(1);
+const deadlineTimer = setTimeout(() => process.kill(process.pid, 'SIGKILL'), remainingMs);
+deadlineTimer.unref();
+
+const result = await checkForUpdate({
+  ...(process.env.ARCHIFY_UPDATE_RELEASE_PATH
+    ? { releasePath: process.env.ARCHIFY_UPDATE_RELEASE_PATH } : {}),
+  ...(process.env.ARCHIFY_UPDATE_CACHE_DIRECTORY
+    ? { cacheDirectory: process.env.ARCHIFY_UPDATE_CACHE_DIRECTORY } : {}),
+  // Leave time to record a failed fetch, so a slow network backs off instead
+  // of being killed before its result reaches the cache.
+  timeoutMs: Math.max(1, Math.floor(remainingMs - 150)),
+});
+process.stdout.write(`${JSON.stringify(result)}\n`);