feat: add per-page SEO metadata, structured data, and AI-search crawler access

app/src/app/athlete/[slug]/page.tsx

@@ -1,3 +1,4 @@
+import type { Metadata } from "next";
 import { notFound } from "next/navigation";
 import { getAthleteProfile } from "@/lib/athlete-shards";
 import { getCountryFlagISO } from "@/lib/flags";
@@ -16,6 +17,26 @@ interface PageProps {
   params: Promise<{ slug: string }>;
 }
 
+// The duplicate getAthleteProfile call (metadata + page) is served from the
+// in-memory shard cache, so it costs one shard fetch, not two.
+export async function generateMetadata({ params }: PageProps): Promise<Metadata> {
+  const { slug } = await params;
+  const profile = await getAthleteProfile(slug);
+  if (!profile) return {};
+
+  const name = formatAthleteName(profile.fullName);
+  const raceCount = profile.races.length;
+  const title = `${name} — Triathlon Race History`;
+  const description = `${name}${profile.country ? ` (${profile.country})` : ""} has ${raceCount} IRONMAN and IRONMAN 70.3 ${raceCount === 1 ? "result" : "results"} on TriTimes. View finish times, splits, and percentiles for every race.`;
+
+  return {
+    title,
+    description,
+    alternates: { canonical: `/athlete/${slug}` },
+    openGraph: { title, description, url: `/athlete/${slug}` },
+  };
+}
+
 export default async function AthletePage({ params }: PageProps) {
   const { slug } = await params;
   const profile = await getAthleteProfile(slug);

app/src/app/courses/page.tsx

@@ -2,9 +2,10 @@ import { getCourseStats } from "@/lib/data";
 import CourseCharts from "./course-charts";
 
 export const metadata = {
-  title: "Course Difficulty | TriTimes",
+  title: "IRONMAN & 70.3 Course Difficulty",
   description:
-    "Compare IRONMAN and IRONMAN 70.3 course difficulty based on median finish times across all race editions.",
+    "Which IRONMAN courses are fastest? Compare IRONMAN and IRONMAN 70.3 course difficulty based on median finish times across all race editions.",
+  alternates: { canonical: "/courses" },
 };
 
 export default function CoursesPage() {

app/src/app/layout.tsx

@@ -18,9 +18,23 @@ const geistMono = Geist_Mono({
 });
 
 export const metadata: Metadata = {
-  title: "TriTimes — Triathlon Times",
+  metadataBase: new URL("https://tritimes.org"),
+  title: {
+    default: "TriTimes — IRONMAN & 70.3 Triathlon Results",
+    template: "%s | TriTimes",
+  },
   description:
-    "View your IronMan 70.3 triathlon results with statistical distributions for swim, bike, run, and total time.",
+    "Look up IRONMAN and IRONMAN 70.3 race results with full-field time distributions. See your percentile for swim, bike, run, and overall across 1,400+ races since 2002.",
+  openGraph: {
+    siteName: "TriTimes",
+    type: "website",
+    url: "https://tritimes.org",
+  },
+  // Set GOOGLE_SITE_VERIFICATION in Vercel to verify the site in Google
+  // Search Console without committing the token.
+  verification: {
+    google: process.env.GOOGLE_SITE_VERIFICATION,
+  },
 };
 
 export default function RootLayout({

app/src/app/page.tsx

@@ -1,8 +1,21 @@
 import GlobalSearchBar from "@/components/GlobalSearchBar";
 
+const WEBSITE_JSON_LD = {
+  "@context": "https://schema.org",
+  "@type": "WebSite",
+  name: "TriTimes",
+  url: "https://tritimes.org",
+  description:
+    "IRONMAN and IRONMAN 70.3 race results with full-field time distributions and percentiles for swim, bike, and run.",
+};
+
 export default function Home() {
   return (
     <main className="flex-1">
+      <script
+        type="application/ld+json"
+        dangerouslySetInnerHTML={{ __html: JSON.stringify(WEBSITE_JSON_LD) }}
+      />
       {/* Hero section */}
       <section className="relative">
         {/* Background gradient */}

app/src/app/race/[slug]/page.tsx

@@ -1,3 +1,4 @@
+import type { Metadata } from "next";
 import { notFound } from "next/navigation";
 import Link from "next/link";
 import { getRaceBySlug, getRaceStats } from "@/lib/data";
@@ -25,6 +26,23 @@ interface PageProps {
   params: Promise<{ slug: string }>;
 }
 
+export async function generateMetadata({ params }: PageProps): Promise<Metadata> {
+  const { slug } = await params;
+  const race = getRaceBySlug(slug);
+  if (!race) return {};
+
+  const location = getRaceLocation(race);
+  const title = `${race.name} — Results & Time Distributions`;
+  const description = `Full results for ${race.name}${location ? ` in ${location}` : ""}: ${race.finishers.toLocaleString()} finishers, fastest and median splits, and time distributions for swim, bike, and run.`;
+
+  return {
+    title,
+    description,
+    alternates: { canonical: `/race/${slug}` },
+    openGraph: { title, description, url: `/race/${slug}` },
+  };
+}
+
 function genderColor(gender: string): string {
   if (gender === "Male") return "#3b82f6";
   if (gender === "Female") return "#ec4899";
@@ -46,8 +64,24 @@ export default async function RacePage({ params }: PageProps) {
 
   const location = getRaceLocation(race);
 
+  const jsonLd = {
+    "@context": "https://schema.org",
+    "@type": "SportsEvent",
+    name: race.name,
+    sport: "Triathlon",
+    eventStatus: "https://schema.org/EventScheduled",
+    ...(race.date ? { startDate: race.date } : {}),
+    ...(location ? { location: { "@type": "Place", name: location } } : {}),
+    url: `https://tritimes.org/race/${slug}`,
+  };
+
   return (
     <main className="max-w-6xl w-full mx-auto px-4 py-8">
+      <script
+        type="application/ld+json"
+        // Escape "<" so race names can never close the script tag early.
+        dangerouslySetInnerHTML={{ __html: JSON.stringify(jsonLd).replace(/</g, "\\u003c") }}
+      />
       <header className="mb-8">
         <h1 className="text-3xl font-bold text-white">{race.name}</h1>
         <p className="text-gray-400 mt-1">

app/src/app/race/[slug]/result/[id]/page.tsx

@@ -1,3 +1,4 @@
+import type { Metadata } from "next";
 import { Suspense } from "react";
 import { notFound } from "next/navigation";
 import Link from "next/link";
@@ -21,6 +22,26 @@ interface PageProps {
   params: Promise<{ slug: string; id: string }>;
 }
 
+export async function generateMetadata({ params }: PageProps): Promise<Metadata> {
+  const { slug, id } = await params;
+  const race = getRaceBySlug(slug);
+  const athlete = race ? getAthleteById(slug, Number(id)) : null;
+  if (!race || !athlete) return {};
+
+  const name = formatAthleteName(athlete.fullName);
+  const title = `${name} — ${race.name} Result`;
+  const description = athlete.finishTime
+    ? `${name} finished ${race.name} in ${athlete.finishTime}${athlete.ageGroup ? ` (${athlete.ageGroup})` : ""}. Swim ${athlete.swimTime}, bike ${athlete.bikeTime}, run ${athlete.runTime}. See percentiles and full-field time distributions.`
+    : `${name}'s result at ${race.name}. See splits, percentiles, and full-field time distributions.`;
+
+  return {
+    title,
+    description,
+    alternates: { canonical: `/race/${slug}/result/${id}` },
+    openGraph: { title, description, url: `/race/${slug}/result/${id}` },
+  };
+}
+
 export default async function ResultPage({ params }: PageProps) {
   const { slug, id } = await params;
   const race = getRaceBySlug(slug);

app/src/app/races/page.tsx

@@ -1,8 +1,21 @@
-import { getRaces } from "@/lib/races";
+import type { Metadata } from "next";
+import { getRaces, getGlobalStats } from "@/lib/races";
 import RaceList from "./race-list";
 
 export const revalidate = false;
 
+export function generateMetadata(): Metadata {
+  const { raceCount, totalResults } = getGlobalStats();
+  const description = `Browse ${raceCount.toLocaleString()} IRONMAN and IRONMAN 70.3 races with ${totalResults.toLocaleString()} finisher results. Filter by distance and year, then dive into time distributions for any race.`;
+
+  return {
+    title: "All IRONMAN & 70.3 Races",
+    description,
+    alternates: { canonical: "/races" },
+    openGraph: { title: "All IRONMAN & 70.3 Races", description, url: "/races" },
+  };
+}
+
 export default function RacesPage() {
   const races = getRaces();
 

app/src/app/robots.ts

@@ -2,17 +2,20 @@ import type { MetadataRoute } from "next";
 
 const SITE_URL = "https://tritimes.org";
 
-// AI training crawlers that have produced spikes of unique-URL traffic on
-// data-heavy sites. Blocking them keeps ISR writes bounded and the site's
+// AI *training* crawlers that have produced spikes of unique-URL traffic on
+// data-heavy sites. Blocking them keeps render spend bounded and the site's
 // content out of unattributed model training corpora.
+//
+// Deliberately NOT blocked: AI *search* and user-triggered agents
+// (OAI-SearchBot, ChatGPT-User, PerplexityBot, Claude-Web). They power cited
+// answers in ChatGPT Search / Perplexity — a referral channel, not a training
+// corpus — and their fetch volume is demand-driven rather than a full-graph
+// crawl. Result pages render dynamically with no ISR-write cost, so the
+// original spend concern no longer applies to them.
 const BLOCKED_AI_AGENTS = [
   "GPTBot",
-  "ChatGPT-User",
-  "OAI-SearchBot",
   "ClaudeBot",
   "anthropic-ai",
-  "Claude-Web",
-  "PerplexityBot",
   "CCBot",
   "Bytespider",
   "Amazonbot",

app/src/app/stats/page.tsx

@@ -4,9 +4,10 @@ import { getCountryFlagISO } from "@/lib/flags";
 import { formatAthleteName } from "@/lib/format";
 
 export const metadata = {
-  title: "Stats | TriTimes",
+  title: "IRONMAN & 70.3 Stats",
   description:
-    "Aggregate statistics across all IRONMAN and IRONMAN 70.3 races tracked by TriTimes.",
+    "Aggregate statistics across all IRONMAN and IRONMAN 70.3 races tracked by TriTimes: participation trends, finish times, and standout performances.",
+  alternates: { canonical: "/stats" },
 };
 
 function formatSeconds(seconds: number): string {