§7 reference plugin (todo §7); plugins/scheduling is the worked example of the plugin contract — a list page fetching upstream data, a CSRF-guarded form forwarding writes upstream, permission-gated nav. shifts.ts: an injectable-fetch upstream REST client (stateless stand-in for the customer backend) + thin handler factories (list filters by ?q + degrades to a recoverable page on upstream-down; create CSRF-guards via ctx.verifyCsrf, validates, forwards, PRG, 502 on upstream 4xx). plugin.ts: apiVersion literal, namespaced scheduling:read/write perms, nav gated so the whole Scheduling header vanishes for non-holders. Views compose the core building blocks around the native app shell, incl. the plugin's own partials/shift-form. New host capability so a plugin page is native + secure (src/chrome.ts buildPluginChrome): ctx.chrome = brand/global-nav/user/theme/csrf for partials/shell (global menu = Dashboard + every plugin nav fragment + gated admin section, role-filtered + current-marked); ctx.verifyCsrf = the host's bound double-submit verifier (secret stays in the host). Both added to RequestContext (defaulted in buildContext), built per plugin route in app.ts (CSRF cookie set when fresh). Dashboard merges plugin nav fragments too (gated => invisible to anonymous, visual E2E byte-identical). Out of the box: bootstrap grants the demo admin scheduling:read/write (seedAdmin generalized to a roles list, env ADMIN_ROLES); dev compose runs a tiny stdlib mock upstream (examples/shifts-upstream, SCHEDULING_UPSTREAM). plugins/ added to tsconfig + the npm test glob. Tests-first across shifts/chrome/app/dashboard/bootstrap. README Building-a-plugin + Layout and docs/plugin-contract.md (ctx.chrome/verifyCsrf, upstream pattern) updated. typecheck + 296 units + the Ory-free visual E2E green (plugin discovered at boot, routes/nav gated, dashboard unchanged); live full-stack boot-verified (stack up with plugin + mock upstream serving the seeded shifts, bootstrap grants in real Keto all allowed:true) then torn down. apiVersion stays 1.0.0 (contract still assembled in §7). Authenticated browser happy-path deferred to §8 full E2E (line 114).

examples/shifts-upstream/server.mjs

@@ -0,0 +1,44 @@
+// Dev-only mock upstream for the reference plugin (plugins/scheduling) — a stand-in for the
+// customer's real backend so `docker compose up` shows the plugin working out of the box. NOT part
+// of the app: stdlib only, in-memory (state resets on restart), no auth. Point SCHEDULING_UPSTREAM
+// at your real service in production.
+//
+//   GET  /shifts  → 200 [ { id, title, assignee, start, end }, … ]
+//   POST /shifts  → 201 { id, … }   (body: { title, assignee, start, end })
+
+import { randomUUID } from "node:crypto";
+import { createServer } from "node:http";
+
+const PORT = Number(process.env.PORT ?? 4000);
+
+const shifts = [
+  { id: randomUUID(), title: "Morning — Front desk", assignee: "Avery Kline", start: "2026-06-22 08:00", end: "2026-06-22 12:00" },
+  { id: randomUUID(), title: "Afternoon — Support", assignee: "Blair Mora", start: "2026-06-22 12:00", end: "2026-06-22 17:00" },
+  { id: randomUUID(), title: "Evening — On-call", assignee: "Casey Nguyen", start: "2026-06-22 17:00", end: "2026-06-22 22:00" },
+];
+
+const json = (res, status, body) => {
+  res.writeHead(status, { "content-type": "application/json; charset=utf-8" });
+  res.end(JSON.stringify(body));
+};
+
+const readBody = (req) =>
+  new Promise((resolve) => {
+    let data = "";
+    req.on("data", (c) => (data += c));
+    req.on("end", () => {
+      try { resolve(data ? JSON.parse(data) : {}); } catch { resolve({}); }
+    });
+  });
+
+createServer(async (req, res) => {
+  const url = new URL(req.url ?? "/", "http://localhost");
+  if (url.pathname === "/shifts" && req.method === "GET") return json(res, 200, shifts);
+  if (url.pathname === "/shifts" && req.method === "POST") {
+    const b = await readBody(req);
+    const shift = { id: randomUUID(), assignee: String(b.assignee ?? ""), end: String(b.end ?? ""), start: String(b.start ?? ""), title: String(b.title ?? "") };
+    shifts.push(shift);
+    return json(res, 201, shift);
+  }
+  json(res, 404, { error: "not found" });
+}).listen(PORT, () => console.log(`shifts-upstream listening on :${PORT}`));