site: state the agent count as eighteen (FRE-997, count half)

FRE-359 verdict B dropped the agent count instead of correcting it: the page
said thirteen while `AgentSpec.all` held eighteen, and the /agents table listed
13 of those rows. The count is a fact, not a claim, so this states it and makes
the table match the registry again.

- Landing island bullet and the marquee chip say 18 agents.
- /agents: title/description/ogTitle/H1 at eighteen, and the five missing rows
  are on the page — Kimi, GitHub Copilot CLI, Crush, Cursor, Amp — with events
  and gating taken from hook/setup.go, hook/normalize.go,
  hook/normalize_hosts.go, Sources/NookCore/Agents/HookConfigInstaller.swift
  and plugins/amp/index.ts. All five are Observe (kimi/copilot PreToolUse and
  PermissionRequest fire before the host's own check; Crush documents one
  event; a silent Cursor permission hook blocks; Amp's plugin API has no
  permission-wait event).
- agents.test.ts asserts the roster as an equality with the 18-name registry
  in registry order again, plus the count, instead of a subset check.
- remote-claims.test.ts keeps every FRE-323 remote removal guard and the parked
  copy, and drops only the two completeness bans the corrected count
  contradicts ("every coding agent", "Supported agents") — the ban existed
  because the page claimed the set and listed 13 of 18.
- positioning.md: the coverage row is publishable at 18.

This is the count/roster half of FRE-997 only. The remote-SSH restore is held
by the Chief of Staff against FRE-346 §3 and is not in this commit: no remote
tile, breakdown, demo, chip, /agents remote paragraph or drafts deletion here.

Gate: `bun test src/routes/nook` 18 pass / 0 fail; `bun run build` succeeds.

src/routes/nook/agents.test.ts

@@ -1,6 +1,5 @@
 /**
- * Regression test for the /agents roster (NOOK-336) and its coverage wording
- * (FRE-359).
+ * Regression test for the /agents roster and its coverage count.
  *
  * The page mirrors the app's registry, `AgentSpec.all` in
  * the-nook/Sources/NookCore/Agents/AgentRegistry.swift. When Muse joined
@@ -9,11 +8,11 @@
  * them. The registry lives in another repo, so the expected roster is
  * restated here; when an agent is added there, add it here and on the page.
  *
- * FRE-359 verdict B: the page no longer states a count or claims coverage
- * ("all thirteen", "every coding agent The Nook supports"). The page still
- * lists 13 of the registry's 18 rows — the table is hand-mirrored and its
- * regeneration is its own ticket — so the roster check here is a subset
- * check in registry order, not an equality check.
+ * FRE-997 restored the count. The page said thirteen while the registry held
+ * eighteen, so the count was dropped rather than corrected (FRE-359 verdict B);
+ * now that all eighteen rows are on the page, the roster check is an equality
+ * check again and the page states eighteen. A subset check would let a shipped
+ * agent go missing behind a passing suite, which is the NOOK-336 failure.
  *
  * STATIC SOURCE AUDIT, the same pattern as the downloads regressions.
  */
@@ -48,51 +47,23 @@ const REGISTRY = [
   "Amp"
 ];
 
-const NUMBER_WORDS = ["twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen"];
-
 const entries = [...SOURCE.matchAll(/^\s{4}name: "([^"]+)",$/gm)].map((m) => m[1]);
 
-/** The page's rows are a subset of the registry, in registry order. */
-function subsetInOrder(page: string[], registry: string[]): boolean {
-  let cursor = 0;
-  for (const name of page) {
-    const at = registry.indexOf(name, cursor);
-    if (at === -1) return false;
-    cursor = at + 1;
-  }
-  return true;
-}
-
-describe("Nook /agents roster (NOOK-336)", () => {
-  it("lists only registry agents, in registry order", () => {
-    expect(entries.length).toBeGreaterThan(0);
-    expect(subsetInOrder(entries, REGISTRY)).toBe(true);
+describe("Nook /agents roster", () => {
+  it("lists every registry agent, once, in registry order", () => {
+    expect(entries).toEqual(REGISTRY);
   });
 
-  it("lists each agent at most once", () => {
-    expect(new Set(entries).size).toBe(entries.length);
-  });
-});
-
-describe("Nook /agents coverage wording (FRE-359)", () => {
-  it("states no agent count anywhere on the page", () => {
-    for (const word of NUMBER_WORDS) {
-      expect(COPY.toLowerCase()).not.toContain(word);
-    }
-    // A bare numeral count ("13 agents", "The 13") is just as precise and just
-    // as unverified; the page must not state one in any form.
-    expect(COPY).not.toMatch(/\b\d{1,2} agents\b/);
-    expect(COPY).not.toMatch(/\ball \d{1,2}\b/);
-  });
-
-  it("makes no completeness claim over the agent set", () => {
-    for (const banned of [
-      "every coding agent",
-      "the agents the nook supports",
-      "agents the nook supports",
-      "supported agents"
-    ]) {
-      expect(COPY.toLowerCase()).not.toContain(banned);
-    }
+  it("states the registry's size", () => {
+    expect(entries.length).toBe(18);
+    expect(COPY).toContain("all eighteen");
+    expect(COPY).toContain("The 18 agents");
+    expect(COPY).toContain("eighteen coding agents");
+  });
+
+  it("carries no stale count", () => {
+    expect(COPY.toLowerCase()).not.toContain("thirteen");
+    expect(COPY).not.toMatch(/\b13 agents\b/);
+    expect(COPY).not.toContain("all thirteen");
   });
 });