diff --git a/assets/static/labyricorn-social-card.png b/assets/static/labyricorn-social-card.png
new file mode 100644
index 0000000..b35f83b
Binary files /dev/null and b/assets/static/labyricorn-social-card.png differ
diff --git a/assets/static/social-share.js b/assets/static/social-share.js
new file mode 100644
index 0000000..f3beee4
--- /dev/null
+++ b/assets/static/social-share.js
@@ -0,0 +1,62 @@
+(() => {
+  const announce = (component, message) => {
+    const status = component.querySelector("[data-share-status]");
+    if (!status) return;
+    status.textContent = "";
+    window.requestAnimationFrame(() => {
+      status.textContent = message;
+    });
+  };
+
+  const fallbackCopy = (url) => {
+    const field = document.createElement("textarea");
+    field.value = url;
+    field.setAttribute("readonly", "");
+    field.style.position = "fixed";
+    field.style.opacity = "0";
+    document.body.appendChild(field);
+    field.select();
+    const copied = document.execCommand("copy");
+    field.remove();
+    return copied;
+  };
+
+  const copyLink = async (component) => {
+    const url = component.dataset.shareUrl;
+    try {
+      if (navigator.clipboard && window.isSecureContext) {
+        await navigator.clipboard.writeText(url);
+      } else if (!fallbackCopy(url)) {
+        throw new Error("Copy command unavailable");
+      }
+      announce(component, "Link copied.");
+    } catch (_error) {
+      window.prompt("Copy this link:", url);
+      announce(component, "Copy the link from the dialog.");
+    }
+  };
+
+  document.querySelectorAll("[data-share-component]").forEach((component) => {
+    component.querySelector("[data-share-native]")?.addEventListener("click", async (event) => {
+      event.preventDefault();
+      if (!navigator.share) {
+        await copyLink(component);
+        return;
+      }
+      try {
+        await navigator.share({
+          title: component.dataset.shareTitle,
+          text: component.dataset.shareDescription,
+          url: component.dataset.shareUrl,
+        });
+      } catch (error) {
+        if (error.name !== "AbortError") await copyLink(component);
+      }
+    });
+
+    component.querySelector("[data-share-copy]")?.addEventListener("click", async (event) => {
+      event.preventDefault();
+      await copyLink(component);
+    });
+  });
+})();
diff --git a/assets/static/style.css b/assets/static/style.css
index a84e354..0f08e9d 100644
--- a/assets/static/style.css
+++ b/assets/static/style.css
@@ -432,7 +432,8 @@ h1 { max-width: 880px; margin: 0; font-size: clamp(30px, 4vw, 45px); font-style:
   grid-template-columns: minmax(0, 640px) minmax(230px, 280px);
   grid-template-areas:
     "header info"
-    "body info";
+    "body info"
+    "share info";
   gap: 34px clamp(54px, 7vw, 92px);
   align-items: start;
   padding-block: 68px 90px;
@@ -486,6 +487,45 @@ h1 { max-width: 880px; margin: 0; font-size: clamp(30px, 4vw, 45px); font-style:
 .publication-links a:hover,
 .publication-links a:focus-visible { text-decoration: underline; text-underline-offset: 3px; }
 
+.share-panel {
+  display: grid;
+  grid-template-columns: minmax(150px, .55fr) minmax(0, 1.45fr);
+  gap: 12px 28px;
+  border-block: 1px solid var(--rule);
+  padding-block: 22px;
+}
+.blog-post-layout > .share-panel,
+.article-post-layout > .share-panel { grid-area: share; }
+.share-panel-heading { align-self: center; }
+.share-kicker {
+  margin: 0 0 5px;
+  color: var(--magenta);
+  font: 500 9px var(--mono);
+  letter-spacing: .14em;
+  text-transform: uppercase;
+}
+.share-panel h2 { margin: 0; font: 600 17px/1.3 var(--serif); }
+.share-actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
+.share-action {
+  border: 1px solid var(--rule);
+  padding: 7px 9px;
+  color: var(--muted);
+  font: 500 9px var(--mono);
+  letter-spacing: .07em;
+  text-transform: uppercase;
+}
+.share-action:hover,
+.share-action:focus-visible { border-color: var(--teal); color: var(--teal); outline-color: var(--teal); }
+.share-action-primary { border-color: rgba(81,182,165,.6); color: var(--teal); }
+.share-status {
+  grid-column: 2;
+  min-height: 1.3em;
+  margin: 0;
+  color: var(--teal);
+  font: 500 9px var(--mono);
+  letter-spacing: .06em;
+}
+
 .narration-player {
   border: 1px solid var(--rule);
   padding: 18px 20px;
@@ -548,6 +588,7 @@ h1 { max-width: 880px; margin: 0; font-size: clamp(30px, 4vw, 45px); font-style:
   padding-block: 68px 78px;
 }
 .project-narrative { width: 100%; }
+.project-content > .share-panel { grid-column: 1 / -1; }
 .repository-card { border: 1px solid var(--rule); background: var(--panel); padding: 24px; }
 .repository-card dl { margin: 0; }
 .repository-card a { color: var(--teal); }
@@ -601,6 +642,7 @@ h1 { max-width: 880px; margin: 0; font-size: clamp(30px, 4vw, 45px); font-style:
   grid-template-areas:
     "header info"
     "body info"
+    "share share"
     "navigation navigation"
     "back back";
   gap: 34px clamp(54px, 7vw, 92px);
@@ -610,6 +652,7 @@ h1 { max-width: 880px; margin: 0; font-size: clamp(30px, 4vw, 45px); font-style:
 .devlog-entry-header { grid-area: header; }
 .devlog-entry-header h1 { font-style: normal; }
 .devlog-entry-body { grid-area: body; width: 100%; }
+.devlog-entry-layout > .share-panel { grid-area: share; }
 .devlog-info { grid-area: info; }
 .devlog-info .post-info-title { color: var(--violet); }
 .devlog-navigation { grid-area: navigation; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; margin-top: 38px; border: 1px solid var(--rule); background: var(--rule); }
@@ -702,6 +745,7 @@ h1 { max-width: 880px; margin: 0; font-size: clamp(30px, 4vw, 45px); font-style:
       "header"
       "info"
       "body"
+      "share"
       "navigation"
       "back";
     gap: 30px;
@@ -716,11 +760,14 @@ h1 { max-width: 880px; margin: 0; font-size: clamp(30px, 4vw, 45px); font-style:
     grid-template-areas:
       "header"
       "info"
-      "body";
+      "body"
+      "share";
     gap: 30px;
     padding-block: 44px 65px;
   }
   .post-info { padding: 20px; }
+  .share-panel { grid-template-columns: 1fr; }
+  .share-status { grid-column: 1; }
   .narration-player { padding: 18px; }
   .narration-details { align-items: flex-start; flex-direction: column-reverse; }
   .footer-inner { align-items: flex-start; flex-direction: column; padding-block: 28px; }
diff --git a/templates/base.html b/templates/base.html
index 117aeff..7a39ca1 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -1,19 +1,21 @@
 <!doctype html>
+{% from "macros/social-sharing.html" import social_metadata with context %}
 <html lang="en">
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
-  <meta name="description" content="{{ this.summary|default('Labyricorn developer devlog and project hub')|striptags }}">
   <title>{% if this._path != '/' %}{{ this.title }} — {% endif %}Labyricorn</title>
+  {% block social_head %}{{ social_metadata(this) }}{% endblock %}
   <link rel="preconnect" href="https://fonts.googleapis.com">
   <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
   <link href="https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=Inter:wght@400;500&family=Playfair+Display:ital,wght@0,600;0,700;1,500;1,600&display=swap" rel="stylesheet">
   <link rel="icon" href="{{ '/static/favicon.svg'|url }}" type="image/svg+xml">
-  <link rel="stylesheet" href="{{ '/static/style.css'|url }}?v=15">
+  <link rel="stylesheet" href="{{ '/static/style.css'|url }}?v=16">
   <script src="{{ '/static/tags.js'|url }}?v=1" defer></script>
   <script src="{{ '/static/activity.js'|url }}?v=1" defer></script>
   <script src="{{ '/static/hero-circuit.js'|url }}?v=2" defer></script>
   <script src="{{ '/static/narration.js'|url }}?v=1" defer></script>
+  <script src="{{ '/static/social-share.js'|url }}?v=1" defer></script>
 </head>
 <body>
   <header class="site-header">
diff --git a/templates/devlog-entry.html b/templates/devlog-entry.html
index e113707..2e7afcc 100644
--- a/templates/devlog-entry.html
+++ b/templates/devlog-entry.html
@@ -1,5 +1,10 @@
 {% extends "base.html" %}
 {% from "macros/tag-links.html" import taxonomy_labels with context %}
+{% from "macros/social-sharing.html" import social_metadata, share_controls with context %}
+{% block social_head %}
+  {% set social_project = this.parent.parent %}
+  {{ social_metadata(this, 'TechArticle', 'article', social_project) }}
+{% endblock %}
 {% block body %}
 {% set project = this.parent.parent %}
 {% set siblings = this.get_siblings() %}
@@ -28,6 +33,8 @@
     {{ this.body }}
   </div>
 
+  {{ share_controls(this, 'development note', project) }}
+
   <nav class="devlog-navigation" aria-label="Development log chronology">
     {% if siblings.prev_page %}
     <a class="devlog-navigation-link" href="{{ siblings.prev_page|url }}"><span>← Older entry</span><strong>{{ siblings.prev_page.title }}</strong></a>
diff --git a/templates/entry.html b/templates/entry.html
index fd92014..46aad73 100644
--- a/templates/entry.html
+++ b/templates/entry.html
@@ -1,6 +1,10 @@
 {% extends "base.html" %}
 {% from "macros/tag-links.html" import tag_links with context %}
 {% from "macros/narration-player.html" import narration_player with context %}
+{% from "macros/social-sharing.html" import social_metadata, share_controls with context %}
+{% block social_head %}
+  {% if this.parent._id == 'blog' %}{{ social_metadata(this, 'BlogPosting', 'article') }}{% else %}{{ social_metadata(this, 'Article', 'article') }}{% endif %}
+{% endblock %}
 {% block body %}
 {% if this.parent._id == 'blog' %}
 <article class="blog-post-layout shell">
@@ -37,6 +41,7 @@
     {{ this.body }}
     {% if this.external_url %}<p><a class="button-link" href="{{ this.external_url }}">Visit project →</a></p>{% endif %}
   </div>
+  {{ share_controls(this, 'post') }}
 </article>
 {% elif this.parent._id == 'articles' %}
 {% set article_word_count = this.body|striptags|wordcount %}
@@ -105,6 +110,7 @@
     {{ this.body }}
     {% if this.external_url %}<p><a class="button-link" href="{{ this.external_url }}">Visit project →</a></p>{% endif %}
   </div>
+  {{ share_controls(this, 'article') }}
 </article>
 {% else %}
 <article>
@@ -119,6 +125,7 @@
     <div class="shell prose">
       {{ this.body }}
       {% if this.external_url %}<p><a class="button-link" href="{{ this.external_url }}">Visit project →</a></p>{% endif %}
+      {{ share_controls(this, 'page') }}
     </div>
   </section>
 </article>
diff --git a/templates/macros/social-sharing.html b/templates/macros/social-sharing.html
new file mode 100644
index 0000000..87a03a5
--- /dev/null
+++ b/templates/macros/social-sharing.html
@@ -0,0 +1,145 @@
+{% macro social_metadata(record, schema_type='WebPage', og_type='website', project=none) -%}
+  {% set site_url = 'https://www.labyricorn.com' %}
+  {% set canonical_url = site_url ~ record.url_path %}
+  {% set default_image_url = site_url ~ '/static/labyricorn-social-card.png' %}
+  {% set image_url = default_image_url %}
+  {% if record.social_image %}
+    {% if record.social_image.startswith('https://') %}
+      {% set image_url = record.social_image %}
+    {% elif record.social_image.startswith('/') %}
+      {% set image_url = site_url ~ record.social_image %}
+    {% else %}
+      {% set image_url = site_url ~ record.url_path ~ record.social_image %}
+    {% endif %}
+  {% endif %}
+  {% set social_title = record.title|default('Labyricorn', true)|striptags|trim %}
+  {% set base_description = record.summary|default('Labyricorn developer devlog and project hub', true)|striptags|trim %}
+  {% set social_description = base_description|truncate(220, true, '…') %}
+  {% if schema_type == 'TechArticle' and project %}
+    {% set social_title = record.title ~ ' — ' ~ project.title ~ ' Devlog' %}
+    {% set social_description = (project.title ~ ' devlog — ' ~ base_description)|truncate(220, true, '…') %}
+  {% elif schema_type == 'SoftwareSourceCode' and record.status %}
+    {% set social_description = (base_description ~ ' Status: ' ~ (record.status|capitalize) ~ '.')|truncate(220, true, '…') %}
+  {% endif %}
+  <meta name="description" content="{{ social_description }}">
+  <link rel="canonical" href="{{ canonical_url }}">
+  <meta property="og:title" content="{{ social_title }}">
+  <meta property="og:description" content="{{ social_description }}">
+  <meta property="og:url" content="{{ canonical_url }}">
+  <meta property="og:type" content="{{ og_type }}">
+  <meta property="og:site_name" content="Labyricorn">
+  <meta property="og:image" content="{{ image_url }}">
+  <meta property="og:image:secure_url" content="{{ image_url }}">
+  <meta property="og:image:type" content="image/png">
+  <meta property="og:image:width" content="1200">
+  <meta property="og:image:height" content="630">
+  <meta property="og:image:alt" content="Labyricorn — systems, ideas, infrastructure, built to evolve.">
+  <meta name="twitter:card" content="summary_large_image">
+  <meta name="twitter:title" content="{{ social_title }}">
+  <meta name="twitter:description" content="{{ social_description }}">
+  <meta name="twitter:image" content="{{ image_url }}">
+  <meta name="twitter:image:alt" content="Labyricorn — systems, ideas, infrastructure, built to evolve.">
+  {% if record.author %}<meta name="author" content="{{ record.author }}">{% endif %}
+  {% if og_type == 'article' and record.date %}<meta property="article:published_time" content="{{ record.date|dateformat('YYYY-MM-dd') }}">{% endif %}
+  {% if og_type == 'article' and record.updated %}<meta property="article:modified_time" content="{{ record.updated|dateformat('YYYY-MM-dd') }}">{% endif %}
+  <script type="application/ld+json">
+  {
+    "@context": "https://schema.org",
+    "@type": {{ schema_type|tojson }},
+    "name": {{ social_title|tojson }},
+    "headline": {{ social_title|tojson }},
+    "description": {{ social_description|tojson }},
+    "url": {{ canonical_url|tojson }},
+    "mainEntityOfPage": {
+      "@type": "WebPage",
+      "@id": {{ canonical_url|tojson }}
+    },
+    "image": {
+      "@type": "ImageObject",
+      "url": {{ image_url|tojson }},
+      "width": 1200,
+      "height": 630
+    },
+    "publisher": {
+      "@type": "Organization",
+      "name": "Labyricorn",
+      "url": "https://www.labyricorn.com/"
+    },
+    "isAccessibleForFree": true
+    {% if record.author %},
+    "author": {
+      "@type": "Person",
+      "name": {{ record.author|tojson }}
+    }
+    {% endif %}
+    {% if schema_type in ['Article', 'BlogPosting', 'TechArticle'] and record.date %},
+    "datePublished": {{ record.date|dateformat('YYYY-MM-dd')|tojson }}
+    {% endif %}
+    {% if schema_type in ['Article', 'BlogPosting'] and record.updated %},
+    "dateModified": {{ record.updated|dateformat('YYYY-MM-dd')|tojson }}
+    {% endif %}
+    {% if schema_type in ['Article', 'BlogPosting'] and record.tags %},
+    "keywords": {{ record.tags|join(', ')|tojson }}
+    {% endif %}
+    {% if schema_type == 'TechArticle' and project %},
+    "articleSection": {{ (project.title ~ ' development log')|tojson }},
+    "isPartOf": {
+      "@type": "CreativeWork",
+      "name": {{ project.title|tojson }},
+      "url": {{ (site_url ~ project.url_path)|tojson }}
+    },
+    "about": {
+      "@type": "SoftwareSourceCode",
+      "name": {{ project.title|tojson }},
+      "url": {{ (site_url ~ project.url_path)|tojson }},
+      "codeRepository": {{ project.repository_url|string|tojson }}
+    }
+    {% if record.topic_tags %},
+    "keywords": {{ record.topic_tags|join(', ')|tojson }}
+    {% endif %}
+    {% endif %}
+    {% if schema_type == 'SoftwareSourceCode' %},
+    "codeRepository": {{ record.repository_url|string|tojson }},
+    "sameAs": {{ record.repository_url|string|tojson }},
+    "creativeWorkStatus": {{ record.status|capitalize|tojson }}
+    {% if record.started %},
+    "dateCreated": {{ record.started|dateformat('YYYY-MM-dd')|tojson }}
+    {% endif %}
+    {% if record.repository_languages %},
+    "programmingLanguage": [
+      {% for language in record.repository_languages %}{{ language|tojson }}{% if not loop.last %},{% endif %}{% endfor %}
+    ]
+    {% endif %}
+    {% if record.repository_latest_release %},
+    "version": {{ record.repository_latest_release|tojson }}
+    {% endif %}
+    {% if record.repository_license %},
+    "license": {{ record.repository_license|tojson }}
+    {% endif %}
+    {% endif %}
+  }
+  </script>
+{%- endmacro %}
+
+{% macro share_controls(record, content_kind='page', project=none) -%}
+  {% set canonical_url = 'https://www.labyricorn.com' ~ record.url_path %}
+  {% set share_title = record.title|striptags|trim %}
+  {% if project %}{% set share_title = project.title ~ ' devlog: ' ~ record.title %}{% endif %}
+  {% set share_description = record.summary|default('', true)|striptags|trim|truncate(180, true, '…') %}
+  {% set bluesky_text = (share_title|truncate(210, true, '…')) ~ ' ' ~ canonical_url %}
+  <aside class="share-panel" aria-labelledby="share-heading" data-share-component data-share-url="{{ canonical_url }}" data-share-title="{{ share_title }}" data-share-description="{{ share_description }}">
+    <div class="share-panel-heading">
+      <p class="share-kicker">Share</p>
+      <h2 id="share-heading">Send this {{ content_kind }}</h2>
+    </div>
+    <div class="share-actions">
+      <a class="share-action share-action-primary" href="{{ canonical_url }}" data-share-native aria-label="Share {{ share_title }}">Share</a>
+      <a class="share-action" href="https://www.facebook.com/sharer/sharer.php?u={{ canonical_url|urlencode }}" target="_blank" rel="noopener noreferrer" aria-label="Share {{ share_title }} on Facebook">Facebook</a>
+      <a class="share-action" href="https://www.linkedin.com/sharing/share-offsite/?url={{ canonical_url|urlencode }}" target="_blank" rel="noopener noreferrer" aria-label="Share {{ share_title }} on LinkedIn">LinkedIn</a>
+      <a class="share-action" href="https://www.reddit.com/submit?url={{ canonical_url|urlencode }}&amp;title={{ share_title|urlencode }}" target="_blank" rel="noopener noreferrer" aria-label="Share {{ share_title }} on Reddit">Reddit</a>
+      <a class="share-action" href="https://bsky.app/intent/compose?text={{ bluesky_text|urlencode }}" target="_blank" rel="noopener noreferrer" aria-label="Share {{ share_title }} on Bluesky">Bluesky</a>
+      <a class="share-action" href="{{ canonical_url }}" data-share-copy aria-label="Copy the link to {{ share_title }}">Copy Link</a>
+    </div>
+    <p class="share-status" data-share-status role="status" aria-live="polite"></p>
+  </aside>
+{%- endmacro %}
diff --git a/templates/project.html b/templates/project.html
index 683121a..fe177a7 100644
--- a/templates/project.html
+++ b/templates/project.html
@@ -1,5 +1,7 @@
 {% extends "base.html" %}
 {% from "macros/tag-links.html" import tag_links, taxonomy_labels with context %}
+{% from "macros/social-sharing.html" import social_metadata, share_controls with context %}
+{% block social_head %}{{ social_metadata(this, 'SoftwareSourceCode', 'website') }}{% endblock %}
 {% block body %}
 {% set devlog = site.get(this.path ~ '/devlog') %}
 <article class="project-page">
@@ -70,6 +72,7 @@
         </div>
       </dl>
     </aside>
+    {{ share_controls(this, 'project') }}
   </div>
 
   {% if this.technology_labels %}