diff --git a/CHANGELOG.md b/CHANGELOG.md
index b635088..3908089 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,20 @@ versions follow [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 Releases before 1.1.0 predate this file.
 
+## [1.2.9] - 2026-10-03
+
+### Added
+
+- Twitter and locale tags on every page.
+
+### Changed
+
+- Estate list includes Cueprise, Storefront and Cuelearn.
+
+### Fixed
+
+- Page descriptions end on a whole sentence.
+
 ## [1.2.8] - 2026-10-03
 
 ### Changed
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 446c060..1074890 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -39,7 +39,7 @@ from `node_modules` at build time.
 
 `scripts/build.mjs` (bar the knob block at its top), `scripts/check-links.mjs`,
 `scripts/check-dashes.mjs`, `scripts/generate-og-image.mjs`, `scripts/check-og-card.mjs`,
-`scripts/check-not-found.mjs`, `scripts/check-titles.mjs`,
+`scripts/check-not-found.mjs`, `scripts/check-titles.mjs`, `scripts/check-descriptions.mjs`,
 `templates/page.html`, `templates/rum.js`,
 `.github/workflows/pages.yml`, `.npmrc` and the browser icons under `assets/`
 are identical in handbook, terms and privacy-policy. Change one, change all
diff --git a/llms.txt b/llms.txt
index 68c5e52..4617ed9 100644
--- a/llms.txt
+++ b/llms.txt
@@ -26,9 +26,9 @@ CueLABS(TM) proves them in public on open-source products, and CueHIRE(TM),
 Cuesoft's talent and project management agency, delivers them to companies
 through end-to-end delivery, managed engineers and referral hiring. Three
 products: Cueprise(TM), a business management system licensed per business and
-deployed on the client's own cloud, Storefront(TM), the website a business puts
-in front of its customers, and Cuelearn(TM), a learning platform Cuesoft sells
-to institutions.
+deployed on the client's own cloud, Storefront(TM), the website a business
+puts in front of its customers, and Cuelearn(TM), the learning platform Cuesoft
+sells to institutions.
 
 ## Contact
 
@@ -42,6 +42,9 @@ to institutions.
 - [CueTA(TM)](https://cueta.cuesoft.io): the talent academy
 - [CueLABS(TM)](https://cuelabs.cuesoft.io): open-source internships
 - [CueHIRE(TM)](https://cuehire.cuesoft.io): Cuesoft's talent and project management agency
+- [Cueprise(TM)](https://cueprise.cuesoft.io): business management software on the client's own cloud
+- [Storefront(TM)](https://storefront.cuesoft.io): e-commerce, booking and landing page sites, built free
+- [Cuelearn(TM)](https://cuelearn.cuesoft.io): AI-powered learning for institutions
 - [Clients](https://clients.cuesoft.io): client case studies
 - [The CueShow(TM)](https://cueshow.cuesoft.io): the Cuesoft podcast
 - [The CueBlog(TM)](https://blog.cuesoft.io): the Cuesoft blog
diff --git a/package-lock.json b/package-lock.json
index d2b3ae4..a0e0d6a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "terms",
-  "version": "1.2.8",
+  "version": "1.2.9",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "terms",
-      "version": "1.2.8",
+      "version": "1.2.9",
       "dependencies": {
         "@cuesoftinc/design-system": "1.46.9",
         "@datadog/browser-rum": "7.14.0",
diff --git a/package.json b/package.json
index 1335039..46664de 100644
--- a/package.json
+++ b/package.json
@@ -1,15 +1,16 @@
 {
   "name": "terms",
-  "version": "1.2.8",
+  "version": "1.2.9",
   "description": "Cuesoft Terms of Service: markdown source, built into the brand template.",
   "private": true,
   "type": "module",
   "scripts": {
     "build": "node scripts/build.mjs",
     "prebuild": "cuesoft-design-assets assets/design-system",
-    "postbuild": "node scripts/check-dashes.mjs && node scripts/check-og-card.mjs && node scripts/check-not-found.mjs && node scripts/check-titles.mjs",
+    "postbuild": "node scripts/check-dashes.mjs && node scripts/check-og-card.mjs && node scripts/check-not-found.mjs && node scripts/check-titles.mjs && node scripts/check-descriptions.mjs",
     "og": "node scripts/generate-og-image.mjs",
     "check:dashes": "node scripts/check-dashes.mjs",
+    "check:descriptions": "node scripts/check-descriptions.mjs",
     "check:design-system": "cuesoft-design-check corporate",
     "check:links": "node scripts/check-links.mjs",
     "check:og": "node scripts/check-og-card.mjs",
diff --git a/scripts/build.mjs b/scripts/build.mjs
index d03f924..044987a 100644
--- a/scripts/build.mjs
+++ b/scripts/build.mjs
@@ -107,8 +107,42 @@ const escapeHtml = (s) =>
     .replaceAll('>', '>')
     .replaceAll('"', '"');
 
+const DESCRIPTION_LIMIT = 160;
+// twitter:description holds 200 characters.
+const DESCRIPTION_CEILING = 200;
+// A boundary after an initial, a dotted abbreviation or one of these words is not a sentence end.
+const ABBREVIATION = /^(?:\p{L}\.)*\p{L}$|^(?:etc|vs|cf|inc|ltd|art|approx)$/iu;
+
+// The text's sentences, each ending in . ! or ?; an unfinished tail is dropped.
+function sentencesOf(text) {
+  const sentences = [];
+  let start = 0;
+  for (const match of text.matchAll(/[.!?]+["')\]’”]*(?=\s(?!\p{Ll})|$)/gu)) {
+    const word = text.slice(start, match.index).split(' ').pop().replace(/^[^\p{L}\p{N}]+/u, '');
+    if (ABBREVIATION.test(word)) continue;
+    const end = match.index + match[0].length;
+    sentences.push(text.slice(start, end).trim());
+    start = end;
+  }
+  return sentences;
+}
+
+// Whole sentences only, never a clipped one: the longest leading run within the limit, else the first sentence within the ceiling, else the site description.
+function clipDescription(text) {
+  if (text.length <= DESCRIPTION_LIMIT) return text;
+  const sentences = sentencesOf(text);
+  let run = '';
+  for (const sentence of sentences) {
+    const next = run ? `${run} ${sentence}` : sentence;
+    if (next.length > DESCRIPTION_LIMIT) break;
+    run = next;
+  }
+  if (run) return run;
+  return sentences.length > 0 && sentences[0].length <= DESCRIPTION_CEILING ? sentences[0] : DESCRIPTION;
+}
+
 // A page describes itself: its first body paragraph, stripped of markdown,
-// clipped for the description and social-card tags.
+// cut at a sentence end for the description and social-card tags.
 function descriptionOf(markdown) {
   const block = markdown
     .split(/\n\s*\n/)
@@ -132,9 +166,7 @@ function descriptionOf(markdown) {
     .replaceAll(/[*_`]/g, '')
     .replaceAll(/\s+/g, ' ')
     .trim();
-  if (text.length <= 160) return text;
-  const cut = text.slice(0, 157);
-  return `${cut.slice(0, Math.max(cut.lastIndexOf(' '), 120))}…`;
+  return clipDescription(text);
 }
 
 /** Every directory that carries a README.md is a page. */
diff --git a/scripts/check-descriptions.mjs b/scripts/check-descriptions.mjs
new file mode 100644
index 0000000..385513d
--- /dev/null
+++ b/scripts/check-descriptions.mjs
@@ -0,0 +1,68 @@
+// Fails when a built page's description, og:description or twitter:description is clipped:
+// one that ends in an ellipsis, or anywhere but at the end of a sentence, so a mid-word
+// cut cannot ship. Redirect stubs carry no description and are skipped. Runs after every
+// build (postbuild) and in CI.
+//
+//   node scripts/check-descriptions.mjs
+import { existsSync, readdirSync, readFileSync } from 'node:fs';
+import path from 'node:path';
+
+const SITE = path.join(import.meta.dirname, '..', '_site');
+
+const TAGS = [
+  ['description', /<meta name="description" content="([^"]*)"/],
+  ['og:description', /<meta property="og:description" content="([^"]*)"/],
+  ['twitter:description', /<meta name="twitter:description" content="([^"]*)"/],
+];
+
+// A description ends on . ! ? or : (the lead-in to a list), closed by at most a quote or bracket.
+const COMPLETE = /[.!?:]["')\]’”]*$/;
+
+const decode = (text) =>
+  text
+    .replaceAll('&quot;', '"')
+    .replaceAll('&#39;', "'")
+    .replaceAll('&lt;', '<')
+    .replaceAll('&gt;', '>')
+    .replaceAll('&amp;', '&');
+
+const pages = (dir) =>
+  readdirSync(dir, { withFileTypes: true }).flatMap((entry) => {
+    const file = path.join(dir, entry.name);
+    if (entry.isDirectory()) return entry.name === 'assets' ? [] : pages(file);
+    return entry.name.endsWith('.html') ? [file] : [];
+  });
+
+if (!existsSync(SITE)) {
+  console.error('check-descriptions: _site is missing; run the build first');
+  process.exit(1);
+}
+
+const problems = [];
+let checked = 0;
+for (const file of pages(SITE)) {
+  const html = readFileSync(file, 'utf8');
+  if (/<meta http-equiv="refresh"/i.test(html)) continue;
+  const rel = path.relative(SITE, file);
+  for (const [label, pattern] of TAGS) {
+    const match = html.match(pattern);
+    const where = `${rel} ${label}`;
+    if (!match) {
+      problems.push(`${where}: missing`);
+      continue;
+    }
+    checked += 1;
+    const text = decode(match[1]).trim();
+    if (!text) problems.push(`${where}: empty`);
+    else if (text.endsWith('…') || text.endsWith('...')) problems.push(`${where}: ends in an ellipsis: "${text}"`);
+    else if (!COMPLETE.test(text)) problems.push(`${where}: does not end at a sentence end: "${text}"`);
+  }
+}
+if (checked === 0) problems.push('no description found in _site');
+
+if (problems.length) {
+  console.error(`check-descriptions: ${problems.length} problem(s)`);
+  for (const problem of problems) console.error(`  - ${problem}`);
+  process.exit(1);
+}
+console.log(`check-descriptions: ${checked} description(s), none clipped`);
diff --git a/templates/page.html b/templates/page.html
index 2213712..568ab46 100644
--- a/templates/page.html
+++ b/templates/page.html
@@ -8,6 +8,7 @@
     <link rel="canonical" href="{{canonical}}" />
     <meta name="theme-color" content="#325EA6" />
     <meta property="og:site_name" content="{{site}}" />
+    <meta property="og:locale" content="en_GB" />
     <meta property="og:type" content="{{og_type}}" />
     <meta property="og:title" content="{{doc_title}}" />
     <meta property="og:description" content="{{description}}" />
@@ -17,6 +18,8 @@
     <meta property="og:image:height" content="628" />
     <meta property="og:image:alt" content="{{og_alt}}" />
     <meta name="twitter:card" content="summary_large_image" />
+    <meta name="twitter:site" content="@cuesoftinc" />
+    <meta name="twitter:creator" content="@cuesoftinc" />
     <meta name="twitter:title" content="{{doc_title}}" />
     <meta name="twitter:description" content="{{description}}" />
     <meta name="twitter:image" content="{{base}}/assets/og-card.png" />