diff --git a/content/en/_index.md b/content/en/_index.md
index 88df2cd..cd28a96 100644
--- a/content/en/_index.md
+++ b/content/en/_index.md
@@ -1,5 +1,6 @@
 ---
 title: "Home"
+description: "TheAfriForge is the African foundation for free software and digital sovereignty. Open source projects, open governance and continental infrastructure."
 hero:
   kicker: "African digital infrastructure"
   titleLine1: "Free and sovereign"
diff --git a/content/fr/_index.md b/content/fr/_index.md
index 93ff39d..7804601 100644
--- a/content/fr/_index.md
+++ b/content/fr/_index.md
@@ -1,5 +1,6 @@
 ---
 title: "Accueil"
+description: "TheAfriForge est la fondation africaine du logiciel libre et de la souveraineté numérique. Projets open source, gouvernance ouverte et infrastructure continentale."
 hero:
   kicker: "Infrastructure numérique africaine"
   titleLine1: "L'infrastructure libre"
diff --git a/hugo.toml b/hugo.toml
index 4ab6c54..a5cfefc 100644
--- a/hugo.toml
+++ b/hugo.toml
@@ -10,6 +10,8 @@ disableAliases = true
   organization = "TheAfriForge"
   gitforgeUrl = "https://gitforge.africa"
   repositoryUrl = "https://github.com/theafriforge"
+  twitterHandle = "@theafriforge"
+  ogImage = "/images/og-theafriforge.png"
   # Membership form configuration (fallback values).
   # Priority used in templates:
   # 1) HUGO_MEMBERSHIP_FORM_ACTION / HUGO_MEMBERSHIP_FORM_SUCCESS_PATH
@@ -18,6 +20,11 @@ disableAliases = true
   membershipFormAction = ""
   membershipFormSuccessPath = ""
 
+[sitemap]
+  changeFreq = "weekly"
+  filename = "sitemap.xml"
+  priority = 0.5
+
 [languages]
   [languages.fr]
     languageName = "Français"
diff --git a/layouts/_default/baseof.html b/layouts/_default/baseof.html
index e3f1740..87d559b 100644
--- a/layouts/_default/baseof.html
+++ b/layouts/_default/baseof.html
@@ -4,7 +4,7 @@
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <title>{{ if .IsHome }}{{ .Site.Title }}{{ else }}{{ .Title }} | {{ .Site.Title }}{{ end }}</title>
-    <meta name="description" content="{{ i18n "siteDescription" }}">
+    {{ partial "seo.html" . }}
     <script>
       tailwind = {
         config: {
diff --git a/layouts/partials/seo.html b/layouts/partials/seo.html
new file mode 100644
index 0000000..0cde888
--- /dev/null
+++ b/layouts/partials/seo.html
@@ -0,0 +1,85 @@
+{{/* ---- Resolved values ---- */}}
+{{ $title       := cond .IsHome .Site.Title (printf "%s | %s" .Title .Site.Title) }}
+{{ $description := or .Description (i18n "siteDescription") }}
+{{ $url         := .Permalink }}
+{{ $lang        := .Site.Language.Lang }}
+{{ $locale      := replace .Site.LanguageCode "-" "_" }}
+
+{{/* ---- Canonical ---- */}}
+<link rel="canonical" href="{{ $url }}">
+
+{{/* ---- Meta robots ---- */}}
+{{ if or .Params.noindex .Draft }}
+  <meta name="robots" content="noindex, nofollow">
+{{ else }}
+  <meta name="robots" content="index, follow">
+{{ end }}
+
+{{/* ---- Meta description ---- */}}
+{{ with $description }}
+  <meta name="description" content="{{ . | plainify | truncate 160 }}">
+{{ end }}
+
+{{/* ---- Hreflang alternates ---- */}}
+{{ range .AllTranslations }}
+  <link rel="alternate" hreflang="{{ .Language.Lang }}" href="{{ .Permalink }}">
+{{ end }}
+{{ range .AllTranslations }}
+  {{ if eq .Language.Weight 1 }}
+    <link rel="alternate" hreflang="x-default" href="{{ .Permalink }}">
+  {{ end }}
+{{ end }}
+
+{{/* ---- Open Graph ---- */}}
+<meta property="og:site_name" content="{{ .Site.Title }}">
+<meta property="og:title" content="{{ $title }}">
+<meta property="og:description" content="{{ $description | plainify | truncate 200 }}">
+<meta property="og:url" content="{{ $url }}">
+<meta property="og:locale" content="{{ $locale }}">
+{{ if .IsHome }}
+  <meta property="og:type" content="website">
+{{ else }}
+  <meta property="og:type" content="article">
+{{ end }}
+{{ with .Site.Params.ogImage }}
+  <meta property="og:image" content="{{ . | absURL }}">
+{{ end }}
+
+{{/* ---- Twitter Card ---- */}}
+<meta name="twitter:card" content="summary_large_image">
+<meta name="twitter:title" content="{{ $title }}">
+<meta name="twitter:description" content="{{ $description | plainify | truncate 200 }}">
+{{ with .Site.Params.twitterHandle }}
+  <meta name="twitter:site" content="{{ . }}">
+{{ end }}
+{{ with .Site.Params.ogImage }}
+  <meta name="twitter:image" content="{{ . | absURL }}">
+{{ end }}
+
+{{/* ---- JSON-LD Organization (home only) ---- */}}
+{{ if .IsHome }}
+<script type="application/ld+json">
+{
+  "@context": "https://schema.org",
+  "@type": "Organization",
+  "name": "{{ .Site.Title }}",
+  "url": "{{ .Site.BaseURL }}",
+  "description": "{{ i18n "siteDescription" | plainify }}",
+  "sameAs": [
+    {{ with .Site.Params.repositoryUrl }}"{{ . }}"{{ end }}
+  ]
+}
+</script>
+{{ end }}
+
+{{/* ---- JSON-LD WebSite (home only — enables sitelinks search) ---- */}}
+{{ if .IsHome }}
+<script type="application/ld+json">
+{
+  "@context": "https://schema.org",
+  "@type": "WebSite",
+  "name": "{{ .Site.Title }}",
+  "url": "{{ .Site.BaseURL }}"
+}
+</script>
+{{ end }}
diff --git a/layouts/robots.txt b/layouts/robots.txt
new file mode 100644
index 0000000..0c9152d
--- /dev/null
+++ b/layouts/robots.txt
@@ -0,0 +1,6 @@
+User-agent: *
+Allow: /
+
+Sitemap: {{ .Site.BaseURL }}sitemap.xml
+Sitemap: {{ .Site.BaseURL }}fr/sitemap.xml
+Sitemap: {{ .Site.BaseURL }}en/sitemap.xml