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/remote-claims.test.ts

@@ -11,6 +11,16 @@
  * credential. FRE-359 verdict B removed the coverage count for the same
  * reason: the /agents table lists 13 of the registry's 18 rows.
  *
+ * FRE-997 corrects the second half without touching the first. The count was
+ * stale, not unverifiable: `AgentSpec.all` holds eighteen, /agents now lists
+ * all eighteen and `agents.test.ts` asserts that roster as an equality again.
+ * So the two completeness phrasings FRE-359 banned ("every coding agent",
+ * "Supported agents") no longer rest on a 13-of-18 gap — the ban existed
+ * because the page claimed the set and listed two thirds of it. They are out
+ * of `BANNED_COVERAGE` on this branch for that reason alone; the stale counts
+ * stay banned, and every FRE-323 remote sentence stays banned, because this
+ * branch still carries the FRE-323 site state.
+ *
  * The copy was not thrown away — it is parked in
  * `marketing/drafts/remote-ssh/` with the restore gate, and this test asserts
  * it is still there so nobody deletes the parked story as stale. It goes back
@@ -55,13 +65,15 @@ const BANNED_REMOTE_CLAIMS = [
   "this Mac or remote machines"
 ];
 
-/** FRE-359 verdict B: no count, no coverage claim, in any form. */
+/** FRE-359 verdict B: no stale count, in any form.
+ *
+ * "every coding agent" and "Supported agents" left this list with FRE-997:
+ * the page now lists all eighteen registry rows and `agents.test.ts` asserts
+ * that equality, so the completeness claim is backed rather than incomplete. */
 const BANNED_COVERAGE = [
   "all thirteen",
   "thirteen coding agents",
-  "13 agents",
-  "every coding agent",
-  "Supported agents"
+  "13 agents"
 ];
 
 /** User-facing copy only: comments are not copy and may name the old wording. */
@@ -98,9 +110,9 @@ describe("remote claims stay off the site (FRE-323)", () => {
   });
 });
 
-describe("agent coverage count stays off the page (FRE-359 verdict B)", () => {
+describe("the agent count is corrected, not dropped (FRE-997)", () => {
   for (const file of AUDITED) {
-    it(`${file} states no coverage count`, () => {
+    it(`${file} states no stale count`, () => {
       const copy = copyOf(file);
       for (const phrase of BANNED_COVERAGE) {
         expect(copy.toLowerCase()).not.toContain(phrase.toLowerCase());
@@ -108,7 +120,7 @@ describe("agent coverage count stays off the page (FRE-359 verdict B)", () => {
     });
   }
 
-  it("/agents titles the table Agent coverage", () => {
-    expect(copyOf("src/routes/nook/agents.tsx")).toContain("Agent coverage");
+  it("/agents states the registry's size", () => {
+    expect(copyOf("src/routes/nook/agents.tsx")).toContain("Supported agents");
   });
 });