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

turbo/generators/lib/snapshot.ts

@@ -0,0 +1,33 @@
+import { readdirSync, readFileSync, statSync } from "node:fs";
+import { createHash } from "node:crypto";
+import { join, relative } from "node:path";
+
+export type SnapshotEntry = { path: string; sha256: string };
+
+/**
+ * Recursively collect all files under root, sorted by relative path, with
+ * sha256 of post-normalized contents (LF line endings, single trailing
+ * newline). Used by the byte-identical reconstruction test.
+ */
+export function computeSnapshot(root: string): SnapshotEntry[] {
+  const out: SnapshotEntry[] = [];
+  walk(root, root, out);
+  out.sort((a, b) => (a.path < b.path ? -1 : a.path > b.path ? 1 : 0));
+  return out;
+}
+
+function walk(root: string, dir: string, out: SnapshotEntry[]): void {
+  for (const name of readdirSync(dir)) {
+    const full = join(dir, name);
+    const stat = statSync(full);
+    if (stat.isDirectory()) {
+      if (name === "node_modules" || name === ".turbo") continue;
+      walk(root, full, out);
+    } else if (stat.isFile()) {
+      const raw = readFileSync(full, "utf8");
+      const normalized = raw.replace(/\r\n/g, "\n").replace(/\n*$/, "\n");
+      const sha = createHash("sha256").update(normalized).digest("hex");
+      out.push({ path: relative(root, full).replace(/\\/g, "/"), sha256: sha });
+    }
+  }
+}