chore(template): clean-slate template snapshot from bb4a0c7

Curated, product-agnostic snapshot of the post-story-04 tree: demo
content deleted, auth-only reference feature, web-next shell, all gates
green. Product-specific docs, ADRs 027-029, PRDs/epics/archive, editor
library traces, and product naming are curated out; generic template
repairs (coverage provider devDeps, root test:coverage script, live
lint fixes, root-only release-please) are kept. See TEMPLATE.md for
provenance, curation list, and usage.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016j8z4VHjedXDTjEDNg7qHK

scripts/work/state-sync-guard.test.mjs

@@ -0,0 +1,16 @@
+import { describe, it, expect } from "vitest";
+import { execSync } from "node:child_process";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const GUARD = path.join(__dirname, "state-sync-guard.mjs");
+
+describe("state-sync-guard smoke", () => {
+  it("exits 0 when run against the repo's current state (since main is in sync)", () => {
+    // Run the guard; if main's _state.json drifts, this test will fail and tell us.
+    execSync(`node "${GUARD}"`, { encoding: "utf8" });
+    // No assertion on output; the exit code is 0 if we got here without throwing.
+    expect(true).toBe(true);
+  });
+});