diff --git a/assets/og-card.jpg b/assets/og-card.jpg
new file mode 100644
index 00000000..ae24d1b7
Binary files /dev/null and b/assets/og-card.jpg differ
diff --git a/docs/gallery/anvil/index.html b/docs/gallery/anvil/index.html
index 339f2475..585fd094 100644
--- a/docs/gallery/anvil/index.html
+++ b/docs/gallery/anvil/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural blacksmith anvil on a timber stump through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/anvil/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/anvil-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="anvil: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="anvil — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural blacksmith anvil on a timber stump through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/anvil-hero.webp" />
+  <meta name="twitter:image:alt" content="anvil: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/armature-bend/index.html b/docs/gallery/armature-bend/index.html
index aa610b62..5a900a48 100644
--- a/docs/gallery/armature-bend/index.html
+++ b/docs/gallery/armature-bend/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="Rigging end to end in the data API — edit_bones chain construction, name-bound vertex groups with smoothstep blend zones, posing, and depsgraph evaluation — bending a tapered tube through rest, half, and full curl." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/armature-bend/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/armature-bend-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="armature-bend: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="armature-bend — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="Rigging end to end in the data API — edit_bones chain construction, name-bound vertex groups with smoothstep blend zones, posing, and depsgraph evaluation — bending a tapered tube through rest, half, and full curl." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/armature-bend-hero.webp" />
+  <meta name="twitter:image:alt" content="armature-bend: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/attribute-domain-shear/index.html b/docs/gallery/attribute-domain-shear/index.html
index 03119b2d..311c7ecf 100644
--- a/docs/gallery/attribute-domain-shear/index.html
+++ b/docs/gallery/attribute-domain-shear/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="POINT vs CORNER color-attribute domains on a shared-vertex pinwheel: CORNER stays exact per face while a naive per-wedge POINT loop shears to the last write at the hub. Crisp petals versus a smeared swirl in one frame; the measured shear equals the palette closed form." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/attribute-domain-shear/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/attribute-domain-shear-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="attribute-domain-shear: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="attribute-domain-shear — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="POINT vs CORNER color-attribute domains on a shared-vertex pinwheel: CORNER stays exact per face while a naive per-wedge POINT loop shears to the last write at the hub. Crisp petals versus a smeared swirl in one frame; the measured shear equals the palette closed form." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/attribute-domain-shear-hero.webp" />
+  <meta name="twitter:image:alt" content="attribute-domain-shear: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/bake-normal-high-to-low/index.html b/docs/gallery/bake-normal-high-to-low/index.html
index c1765f72..fac26300 100644
--- a/docs/gallery/bake-normal-high-to-low/index.html
+++ b/docs/gallery/bake-normal-high-to-low/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A collapse-decimated hatch plate receiving a Cycles cage-baked tangent normal map from a ribbed high-poly source" />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/bake-normal-high-to-low/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/bake-normal-high-to-low-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="bake-normal-high-to-low: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="bake-normal-high-to-low — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A collapse-decimated hatch plate receiving a Cycles cage-baked tangent normal map from a ribbed high-poly source" />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/bake-normal-high-to-low-hero.webp" />
+  <meta name="twitter:image:alt" content="bake-normal-high-to-low: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/bmesh-gear/index.html b/docs/gallery/bmesh-gear/index.html
index 135578d3..f8bbebd3 100644
--- a/docs/gallery/bmesh-gear/index.html
+++ b/docs/gallery/bmesh-gear/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A 14-tooth gear built entirely with bmesh — profile ring, face, extrude — with bm.free() in a try/finally, exactly as the ownership contract demands." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/bmesh-gear/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/bmesh-gear-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="bmesh-gear: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="bmesh-gear — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A 14-tooth gear built entirely with bmesh — profile ring, face, extrude — with bm.free() in a try/finally, exactly as the ownership contract demands." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/bmesh-gear-hero.webp" />
+  <meta name="twitter:image:alt" content="bmesh-gear: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/campfire/index.html b/docs/gallery/campfire/index.html
index da71af9f..69073293 100644
--- a/docs/gallery/campfire/index.html
+++ b/docs/gallery/campfire/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural campfire through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/campfire/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/campfire-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="campfire: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="campfire — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural campfire through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/campfire-hero.webp" />
+  <meta name="twitter:image:alt" content="campfire: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/car-mirror-symmetry/index.html b/docs/gallery/car-mirror-symmetry/index.html
index 040fffc5..58af13b6 100644
--- a/docs/gallery/car-mirror-symmetry/index.html
+++ b/docs/gallery/car-mirror-symmetry/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A generic hatchback lofted as one half (14 stations, 9-point rings) and completed by the Mirror modifier, evaluated through the depsgraph. Wheels and lamps mirror about object origins parked on the symmetry plane." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/car-mirror-symmetry/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/car-mirror-symmetry-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="car-mirror-symmetry: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="car-mirror-symmetry — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A generic hatchback lofted as one half (14 stations, 9-point rings) and completed by the Mirror modifier, evaluated through the depsgraph. Wheels and lamps mirror about object origins parked on the symmetry plane." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/car-mirror-symmetry-hero.webp" />
+  <meta name="twitter:image:alt" content="car-mirror-symmetry: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/cart/index.html b/docs/gallery/cart/index.html
index dd6e143f..3a073b5c 100644
--- a/docs/gallery/cart/index.html
+++ b/docs/gallery/cart/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural two-wheel wooden cart through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/cart/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/cart-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="cart: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="cart — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural two-wheel wooden cart through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/cart-hero.webp" />
+  <meta name="twitter:image:alt" content="cart: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/chopping-block/index.html b/docs/gallery/chopping-block/index.html
index c1ccac8d..522a134a 100644
--- a/docs/gallery/chopping-block/index.html
+++ b/docs/gallery/chopping-block/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural log-round chopping block with a riveted iron hoop and a felling axe buried in the sawn face, through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/chopping-block/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/chopping-block-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="chopping-block: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="chopping-block — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural log-round chopping block with a riveted iron hoop and a felling axe buried in the sawn face, through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/chopping-block-hero.webp" />
+  <meta name="twitter:image:alt" content="chopping-block: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/collision-hull-proxy/index.html b/docs/gallery/collision-hull-proxy/index.html
index 9e1fa8d7..de4c341c 100644
--- a/docs/gallery/collision-hull-proxy/index.html
+++ b/docs/gallery/collision-hull-proxy/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A fire hydrant street prop inside its compound collision shell: four convex pieces hulled by bmesh.ops.convex_hull from a coarse inflated cage. The dense render mesh is never hulled - its hull would measure 380 faces, over the 255-face per-piece engine budget. Closed-form plane tests prove containment, convexity, watertightness, outward winding, and Euler characteristic 2 per piece." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/collision-hull-proxy/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/collision-hull-proxy-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="collision-hull-proxy: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="collision-hull-proxy — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A fire hydrant street prop inside its compound collision shell: four convex pieces hulled by bmesh.ops.convex_hull from a coarse inflated cage. The dense render mesh is never hulled - its hull would measure 380 faces, over the 255-face per-piece engine budget. Closed-form plane tests prove containment, convexity, watertightness, outward winding, and Euler characteristic 2 per piece." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/collision-hull-proxy-hero.webp" />
+  <meta name="twitter:image:alt" content="collision-hull-proxy: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/color-attribute-wheel/index.html b/docs/gallery/color-attribute-wheel/index.html
index 8ebcb6ce..a3543a56 100644
--- a/docs/gallery/color-attribute-wheel/index.html
+++ b/docs/gallery/color-attribute-wheel/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="The modern color-attributes API — mesh.color_attributes.new() on the CORNER domain, filled by expanding per-vertex HSV across face corners with foreach_get/foreach_set, then wired into a shader Attribute node." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/color-attribute-wheel/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/color-attribute-wheel-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="color-attribute-wheel: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="color-attribute-wheel — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="The modern color-attributes API — mesh.color_attributes.new() on the CORNER domain, filled by expanding per-vertex HSV across face corners with foreach_get/foreach_set, then wired into a shader Attribute node." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/color-attribute-wheel-hero.webp" />
+  <meta name="twitter:image:alt" content="color-attribute-wheel: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/compositor-glare/index.html b/docs/gallery/compositor-glare/index.html
index 0f202566..4efcb8cf 100644
--- a/docs/gallery/compositor-glare/index.html
+++ b/docs/gallery/compositor-glare/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="Bloom where it actually lives — a compositor Glare (Fog Glow) node fed by Render Layers, wired via scene.compositing_node_group on 5.x and scene.node_tree on 4.x, with the Glare node&#x27;s legacy properties vs 5.x menu sockets." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/compositor-glare/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/compositor-glare-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="compositor-glare: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="compositor-glare — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="Bloom where it actually lives — a compositor Glare (Fog Glow) node fed by Render Layers, wired via scene.compositing_node_group on 5.x and scene.node_tree on 4.x, with the Glare node&#x27;s legacy properties vs 5.x menu sockets." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/compositor-glare-hero.webp" />
+  <meta name="twitter:image:alt" content="compositor-glare: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/crate-stack/index.html b/docs/gallery/crate-stack/index.html
index 5c2bf3e6..3a8a7cee 100644
--- a/docs/gallery/crate-stack/index.html
+++ b/docs/gallery/crate-stack/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A stack of three procedural shipping crates built by one generator called three times with a per-instance seed, carried through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/crate-stack/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/crate-stack-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="crate-stack: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="crate-stack — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A stack of three procedural shipping crates built by one generator called three times with a per-instance seed, carried through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/crate-stack-hero.webp" />
+  <meta name="twitter:image:alt" content="crate-stack: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/cross-version-property-delete/index.html b/docs/gallery/cross-version-property-delete/index.html
index 76f88a4e..3146a344 100644
--- a/docs/gallery/cross-version-property-delete/index.html
+++ b/docs/gallery/cross-version-property-delete/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="Custom ID properties are removed with del, not property_unset. The IDs are built through bpy.data.objects.new so the check does not depend on active_object." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/cross-version-property-delete/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/cross-version-property-delete-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="cross-version-property-delete: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="cross-version-property-delete — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="Custom ID properties are removed with del, not property_unset. The IDs are built through bpy.data.objects.new so the check does not depend on active_object." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/cross-version-property-delete-hero.webp" />
+  <meta name="twitter:image:alt" content="cross-version-property-delete: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/curve-bevel-arc/index.html b/docs/gallery/curve-bevel-arc/index.html
index 457e6e4d..52e7d50f 100644
--- a/docs/gallery/curve-bevel-arc/index.html
+++ b/docs/gallery/curve-bevel-arc/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A beveled Bezier semicircle authored on bpy.types.Curve — splines.new(&#x27;BEZIER&#x27;), bezier_points, bevel_depth, use_fill_caps — so the curve renders as a solid tube without a prior mesh conversion." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/curve-bevel-arc/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/curve-bevel-arc-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="curve-bevel-arc: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="curve-bevel-arc — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A beveled Bezier semicircle authored on bpy.types.Curve — splines.new(&#x27;BEZIER&#x27;), bezier_points, bevel_depth, use_fill_caps — so the curve renders as a solid tube without a prior mesh conversion." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/curve-bevel-arc-hero.webp" />
+  <meta name="twitter:image:alt" content="curve-bevel-arc: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/custom-normals-shade/index.html b/docs/gallery/custom-normals-shade/index.html
index 93a544b2..56b1a637 100644
--- a/docs/gallery/custom-normals-shade/index.html
+++ b/docs/gallery/custom-normals-shade/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A jerry can prop shaded three ways to prove the post-4.1 shading contract: hard edges are mesh data, landing exactly where the dihedral crosses. Face smooth flags plus a sharp_edge attribute, verified against an independently recomputed dihedral test, and per-loop custom normals surviving depsgraph evaluation within their int16 storage quantization (1.407e-04, not float-exact)." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/custom-normals-shade/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/custom-normals-shade-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="custom-normals-shade: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="custom-normals-shade — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A jerry can prop shaded three ways to prove the post-4.1 shading contract: hard edges are mesh data, landing exactly where the dihedral crosses. Face smooth flags plus a sharp_edge attribute, verified against an independently recomputed dihedral test, and per-loop custom normals surviving depsgraph evaluation within their int16 storage quantization (1.407e-04, not float-exact)." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/custom-normals-shade-hero.webp" />
+  <meta name="twitter:image:alt" content="custom-normals-shade: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/damped-track-aim/index.html b/docs/gallery/damped-track-aim/index.html
index 1d1712f5..76227c36 100644
--- a/docs/gallery/damped-track-aim/index.html
+++ b/docs/gallery/damped-track-aim/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="Aim constraints via the data API — Object.constraints.new(&#x27;DAMPED_TRACK&#x27;) with target and TRACK_Z, not bpy.ops.object.constraint_add in a headless loop. Gallery still: brass spike cage around an ember core." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/damped-track-aim/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/damped-track-aim-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="damped-track-aim: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="damped-track-aim — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="Aim constraints via the data API — Object.constraints.new(&#x27;DAMPED_TRACK&#x27;) with target and TRACK_Z, not bpy.ops.object.constraint_add in a headless loop. Gallery still: brass spike cage around an ember core." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/damped-track-aim-hero.webp" />
+  <meta name="twitter:image:alt" content="damped-track-aim: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/degenerate-bevel-weld/index.html b/docs/gallery/degenerate-bevel-weld/index.html
index 2f36533d..2a2ff564 100644
--- a/docs/gallery/degenerate-bevel-weld/index.html
+++ b/docs/gallery/degenerate-bevel-weld/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="Bevel offset &gt;= half the min box dimension collapses the band into zero-area faces — and they ship: a stdlib GLB re-parse counts the degenerate triangles crossing the export boundary. Dual tray: rounded edge versus knife seam, markers from live mesh data." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/degenerate-bevel-weld/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/degenerate-bevel-weld-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="degenerate-bevel-weld: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="degenerate-bevel-weld — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="Bevel offset &gt;= half the min box dimension collapses the band into zero-area faces — and they ship: a stdlib GLB re-parse counts the degenerate triangles crossing the export boundary. Dual tray: rounded edge versus knife seam, markers from live mesh data." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/degenerate-bevel-weld-hero.webp" />
+  <meta name="twitter:image:alt" content="degenerate-bevel-weld: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/depsgraph-export/index.html b/docs/gallery/depsgraph-export/index.html
index 339e63b8..594250f4 100644
--- a/docs/gallery/depsgraph-export/index.html
+++ b/docs/gallery/depsgraph-export/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="The depsgraph lifetime contract — evaluated_get().to_mesh() paired with to_mesh_clear() — measured against an OBJ export of the same object." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/depsgraph-export/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/depsgraph-export-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="depsgraph-export: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="depsgraph-export — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="The depsgraph lifetime contract — evaluated_get().to_mesh() paired with to_mesh_clear() — measured against an OBJ export of the same object." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/depsgraph-export-hero.webp" />
+  <meta name="twitter:image:alt" content="depsgraph-export: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/driver-wave/index.html b/docs/gallery/driver-wave/index.html
index 6070e6e6..b8d76929 100644
--- a/docs/gallery/driver-wave/index.html
+++ b/docs/gallery/driver-wave/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A driver_namespace function driving sixteen column heights through SCRIPTED drivers — the sine skyline is entirely driver-evaluated." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/driver-wave/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/driver-wave-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="driver-wave: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="driver-wave — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A driver_namespace function driving sixteen column heights through SCRIPTED drivers — the sine skyline is entirely driver-evaluated." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/driver-wave-hero.webp" />
+  <meta name="twitter:image:alt" content="driver-wave: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/export-preset-axis/index.html b/docs/gallery/export-preset-axis/index.html
index de9333a8..9136e179 100644
--- a/docs/gallery/export-preset-axis/index.html
+++ b/docs/gallery/export-preset-axis/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A radio beacon exported under Unity and Godot glTF presets and re-imported, proving the two files have different vertex orientation" />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/export-preset-axis/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/export-preset-axis-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="export-preset-axis: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="export-preset-axis — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A radio beacon exported under Unity and Godot glTF presets and re-imported, proving the two files have different vertex orientation" />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/export-preset-axis-hero.webp" />
+  <meta name="twitter:image:alt" content="export-preset-axis: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/fence-kit/index.html b/docs/gallery/fence-kit/index.html
index b7e7f804..cceb1498 100644
--- a/docs/gallery/fence-kit/index.html
+++ b/docs/gallery/fence-kit/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural post-and-rail fence section whose brace is an oriented box between named post stations, through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/fence-kit/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/fence-kit-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="fence-kit: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="fence-kit — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural post-and-rail fence section whose brace is an oriented box between named post stations, through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/fence-kit-hero.webp" />
+  <meta name="twitter:image:alt" content="fence-kit: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/gltf-export-roundtrip/index.html b/docs/gallery/gltf-export-roundtrip/index.html
index f3c6c70c..ba9d9721 100644
--- a/docs/gallery/gltf-export-roundtrip/index.html
+++ b/docs/gallery/gltf-export-roundtrip/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A sci-fi supply crate exported to glTF and re-imported, verifying the round-trip against the depsgraph-evaluated mesh within float tolerances. Positions, loop normals, box-mapped UVs, and per-triangle material bindings must all survive; the on-disk JSON proves the +Y-up conversion and the V-flipped UV layout." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/gltf-export-roundtrip/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/gltf-export-roundtrip-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="gltf-export-roundtrip: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="gltf-export-roundtrip — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A sci-fi supply crate exported to glTF and re-imported, verifying the round-trip against the depsgraph-evaluated mesh within float tolerances. Positions, loop normals, box-mapped UVs, and per-triangle material bindings must all survive; the on-disk JSON proves the +Y-up conversion and the V-flipped UV layout." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/gltf-export-roundtrip-hero.webp" />
+  <meta name="twitter:image:alt" content="gltf-export-roundtrip: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/gltf-skin-roundtrip/index.html b/docs/gallery/gltf-skin-roundtrip/index.html
index dc845fad..503ed00c 100644
--- a/docs/gallery/gltf-skin-roundtrip/index.html
+++ b/docs/gallery/gltf-skin-roundtrip/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A rigged mech scorpion exported to glTF with skins and re-imported, verifying the skinning contract the geometry round-trip left uncovered. Skeleton, weights, and deformation must all survive the format." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/gltf-skin-roundtrip/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/gltf-skin-roundtrip-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="gltf-skin-roundtrip: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="gltf-skin-roundtrip — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A rigged mech scorpion exported to glTF with skins and re-imported, verifying the skinning contract the geometry round-trip left uncovered. Skeleton, weights, and deformation must all survive the format." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/gltf-skin-roundtrip-hero.webp" />
+  <meta name="twitter:image:alt" content="gltf-skin-roundtrip: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/gn-instance-grid/index.html b/docs/gallery/gn-instance-grid/index.html
index fc260eda..e8f5d837 100644
--- a/docs/gallery/gn-instance-grid/index.html
+++ b/docs/gallery/gn-instance-grid/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A generative Geometry Nodes tree — Mesh Grid → Instance on Points → Realize Instances → Set Shade Smooth — attached as a NODES modifier with no Group Input geometry." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/gn-instance-grid/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/gn-instance-grid-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="gn-instance-grid: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="gn-instance-grid — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A generative Geometry Nodes tree — Mesh Grid → Instance on Points → Realize Instances → Set Shade Smooth — attached as a NODES modifier with no Group Input geometry." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/gn-instance-grid-hero.webp" />
+  <meta name="twitter:image:alt" content="gn-instance-grid: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/gn-modifier-inputs/index.html b/docs/gallery/gn-modifier-inputs/index.html
index 4db10826..ca0a7a70 100644
--- a/docs/gallery/gn-modifier-inputs/index.html
+++ b/docs/gallery/gn-modifier-inputs/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="Per-modifier Geometry Nodes Float inputs on a shared tree — 4.5/5.1 write mod[identifier], 5.2 writes mod.properties.inputs.Socket_1.value." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/gn-modifier-inputs/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/gn-modifier-inputs-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="gn-modifier-inputs: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="gn-modifier-inputs — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="Per-modifier Geometry Nodes Float inputs on a shared tree — 4.5/5.1 write mod[identifier], 5.2 writes mod.properties.inputs.Socket_1.value." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/gn-modifier-inputs-hero.webp" />
+  <meta name="twitter:image:alt" content="gn-modifier-inputs: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/gn-sdf-remesh/index.html b/docs/gallery/gn-sdf-remesh/index.html
index 76a81e20..b8ff4fc8 100644
--- a/docs/gallery/gn-sdf-remesh/index.html
+++ b/docs/gallery/gn-sdf-remesh/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A Geometry Nodes SDF remesh (MeshToSDFGrid → GridToMesh at the SDF zero-level), with a Set Material node carrying the material through the remesh." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/gn-sdf-remesh/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/gn-sdf-remesh-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="gn-sdf-remesh: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="gn-sdf-remesh — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A Geometry Nodes SDF remesh (MeshToSDFGrid → GridToMesh at the SDF zero-level), with a Set Material node carrying the material through the remesh." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/gn-sdf-remesh-hero.webp" />
+  <meta name="twitter:image:alt" content="gn-sdf-remesh: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/gn-socket-rename/index.html b/docs/gallery/gn-socket-rename/index.html
index ee0ab024..f886d238 100644
--- a/docs/gallery/gn-socket-rename/index.html
+++ b/docs/gallery/gn-socket-rename/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="Compare and Random Value socket identifiers collapsed onto reused names in 5.2; enabled-name lookup wires on 4.5, 5.1, and 5.2" />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/gn-socket-rename/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/gn-socket-rename-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="gn-socket-rename: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="gn-socket-rename — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="Compare and Random Value socket identifiers collapsed onto reused names in 5.2; enabled-name lookup wires on 4.5, 5.1, and 5.2" />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/gn-socket-rename-hero.webp" />
+  <meta name="twitter:image:alt" content="gn-socket-rename: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/gn-zone-iterate/index.html b/docs/gallery/gn-zone-iterate/index.html
index 139be942..53b51224 100644
--- a/docs/gallery/gn-zone-iterate/index.html
+++ b/docs/gallery/gn-zone-iterate/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="Repeat Zone and For Each Element only iterate after pair_with_output. Evaluated cube counts follow 8 times (1+N) and 8 times P, not tree structure." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/gn-zone-iterate/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/gn-zone-iterate-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="gn-zone-iterate: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="gn-zone-iterate — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="Repeat Zone and For Each Element only iterate after pair_with_output. Evaluated cube counts follow 8 times (1+N) and 8 times P, not tree structure." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/gn-zone-iterate-hero.webp" />
+  <meta name="twitter:image:alt" content="gn-zone-iterate: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/gp-lineart-contour/index.html b/docs/gallery/gp-lineart-contour/index.html
index 9989880b..a68ad5d3 100644
--- a/docs/gallery/gp-lineart-contour/index.html
+++ b/docs/gallery/gp-lineart-contour/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="Grease Pencil LINEART modifier contours via the depsgraph on a faceted crystal. source_object is load-bearing (clear yields 0 strokes); contour+crease off yields 0; restore recovers 10 strokes / 34 points on both 4.5.11 and 5.1.2. Stroke width: thickness exists on 4.5, AttributeError on 5.1 — portable path is radius." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/gp-lineart-contour/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/gp-lineart-contour-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="gp-lineart-contour: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="gp-lineart-contour — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="Grease Pencil LINEART modifier contours via the depsgraph on a faceted crystal. source_object is load-bearing (clear yields 0 strokes); contour+crease off yields 0; restore recovers 10 strokes / 34 points on both 4.5.11 and 5.1.2. Stroke width: thickness exists on 4.5, AttributeError on 5.1 — portable path is radius." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/gp-lineart-contour-hero.webp" />
+  <meta name="twitter:image:alt" content="gp-lineart-contour: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/grease-pencil-rosette/index.html b/docs/gallery/grease-pencil-rosette/index.html
index d0e5de6e..c2d65278 100644
--- a/docs/gallery/grease-pencil-rosette/index.html
+++ b/docs/gallery/grease-pencil-rosette/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="Grease Pencil v3&#x27;s attribute-based API — layer → frames.new(1).drawing → add_strokes → per-point position/radius/opacity/vertex_color — drawing five nested neon rose curves." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/grease-pencil-rosette/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/grease-pencil-rosette-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="grease-pencil-rosette: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="grease-pencil-rosette — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="Grease Pencil v3&#x27;s attribute-based API — layer → frames.new(1).drawing → add_strokes → per-point position/radius/opacity/vertex_color — drawing five nested neon rose curves." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/grease-pencil-rosette-hero.webp" />
+  <meta name="twitter:image:alt" content="grease-pencil-rosette: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/grindstone/index.html b/docs/gallery/grindstone/index.html
index 60efc65c..b7f34ecc 100644
--- a/docs/gallery/grindstone/index.html
+++ b/docs/gallery/grindstone/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural grindstone on a timber trestle through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/grindstone/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/grindstone-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="grindstone: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="grindstone — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural grindstone on a timber trestle through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/grindstone-hero.webp" />
+  <meta name="twitter:image:alt" content="grindstone: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/hand-pump/index.html b/docs/gallery/hand-pump/index.html
index e42e396b..e5439739 100644
--- a/docs/gallery/hand-pump/index.html
+++ b/docs/gallery/hand-pump/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural village hand pump whose gooseneck is a 6-gon tube from the lower-column radius, through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/hand-pump/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/hand-pump-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="hand-pump: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="hand-pump — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural village hand pump whose gooseneck is a 6-gon tube from the lower-column radius, through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/hand-pump-hero.webp" />
+  <meta name="twitter:image:alt" content="hand-pump: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/hay-bale/index.html b/docs/gallery/hay-bale/index.html
index 9f3bd849..ea4c9274 100644
--- a/docs/gallery/hay-bale/index.html
+++ b/docs/gallery/hay-bale/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A bound hay bale whose twine belts follow the loaf&#x27;s own raycast cross-section, asserting recomputed geometry budgets, not an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/hay-bale/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/hay-bale-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="hay-bale: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="hay-bale — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A bound hay bale whose twine belts follow the loaf&#x27;s own raycast cross-section, asserting recomputed geometry budgets, not an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/hay-bale-hero.webp" />
+  <meta name="twitter:image:alt" content="hay-bale: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/hitching-post/index.html b/docs/gallery/hitching-post/index.html
index ddb10461..8196045d 100644
--- a/docs/gallery/hitching-post/index.html
+++ b/docs/gallery/hitching-post/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural hitching post (eaved cap, one rail, cup shoe, rings hung through eyes) through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/hitching-post/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/hitching-post-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="hitching-post: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="hitching-post — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural hitching post (eaved cap, one rail, cup shoe, rings hung through eyes) through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/hitching-post-hero.webp" />
+  <meta name="twitter:image:alt" content="hitching-post: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/image-pixels-testcard/index.html b/docs/gallery/image-pixels-testcard/index.html
index 3df97d27..060d2073 100644
--- a/docs/gallery/image-pixels-testcard/index.html
+++ b/docs/gallery/image-pixels-testcard/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="The Image pixel-buffer contract — a procedural broadcast test card written into bpy.data.images.new() with one pixels.foreach_set (589,824 floats), byte vs float_buffer storage, scale() reallocation, and the save() vs save_render() lifecycle." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/image-pixels-testcard/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/image-pixels-testcard-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="image-pixels-testcard: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="image-pixels-testcard — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="The Image pixel-buffer contract — a procedural broadcast test card written into bpy.data.images.new() with one pixels.foreach_set (589,824 floats), byte vs float_buffer storage, scale() reallocation, and the save() vs save_render() lifecycle." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/image-pixels-testcard-hero.webp" />
+  <meta name="twitter:image:alt" content="image-pixels-testcard: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/index.html b/docs/gallery/index.html
index 9aa64e5d..ef062116 100644
--- a/docs/gallery/index.html
+++ b/docs/gallery/index.html
@@ -13,11 +13,16 @@
   <meta property="og:title" content="Examples and Showcase — Blender Developer Tools" />
   <meta property="og:description" content="Runnable, smoke-gated Blender Python examples — each executed headless on Blender 5.2 LTS and 4.5 LTS (5.1 on the weekly cron), so every render reflects code that actually runs. Showcase pieces share the grid and carry the &#x27;showcase&#x27; tag; they are budget-conformance props, not examples." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/" />
-  <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/swatch-grid-hero.webp" />
+  <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/assets/og-card.jpg" />
+  <meta property="og:image:width" content="1200" />
+  <meta property="og:image:height" content="630" />
+  <meta property="og:image:alt" content="Four renders from the examples gallery: a red low-poly hatchback, a soccer ball, gold spikes aimed at a glowing sphere, and two spheres on pedestals labelled linked and unlinked" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="Examples and Showcase — Blender Developer Tools" />
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-  <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/swatch-grid-hero.webp" />
+  <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/assets/og-card.jpg" />
+  <meta name="twitter:image:alt" content="Four renders from the examples gallery: a red low-poly hatchback, a soccer ball, gold spikes aimed at a glowing sphere, and two spheres on pedestals labelled linked and unlinked" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/iron-cauldron/index.html b/docs/gallery/iron-cauldron/index.html
index 7f8876c8..f3005fad 100644
--- a/docs/gallery/iron-cauldron/index.html
+++ b/docs/gallery/iron-cauldron/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural hanging iron cauldron with a bulged open pot, bail, and timber tripod through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/iron-cauldron/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/iron-cauldron-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="iron-cauldron: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="iron-cauldron — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural hanging iron cauldron with a bulged open pot, bail, and timber tripod through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/iron-cauldron-hero.webp" />
+  <meta name="twitter:image:alt" content="iron-cauldron: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/light-link-studio/index.html b/docs/gallery/light-link-studio/index.html
index ad2ff9bd..5bb2c7de 100644
--- a/docs/gallery/light-link-studio/index.html
+++ b/docs/gallery/light-link-studio/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="One key, one hero: a light linked to a receiver collection lights only the hero, proven by two pixel renders in one pass. Linked: 3.6x luminance ratio; unlinked in the same check: the decoy rises 233% while the hero holds at 0.3% drift." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/light-link-studio/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/light-link-studio-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="light-link-studio: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="light-link-studio — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="One key, one hero: a light linked to a receiver collection lights only the hero, proven by two pixel renders in one pass. Linked: 3.6x luminance ratio; unlinked in the same check: the decoy rises 233% while the hero holds at 0.3% drift." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/light-link-studio-hero.webp" />
+  <meta name="twitter:image:alt" content="light-link-studio: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/lightmap-uv-channel/index.html b/docs/gallery/lightmap-uv-channel/index.html
index 3c678cbf..1050148a 100644
--- a/docs/gallery/lightmap-uv-channel/index.html
+++ b/docs/gallery/lightmap-uv-channel/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A market cart carrying the two-channel UV contract for baked lighting: UV0 untouched, UVLight packed with no overlaps and a respected margin." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/lightmap-uv-channel/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/lightmap-uv-channel-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="lightmap-uv-channel: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="lightmap-uv-channel — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A market cart carrying the two-channel UV contract for baked lighting: UV0 untouched, UVLight packed with no overlaps and a respected margin." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/lightmap-uv-channel-hero.webp" />
+  <meta name="twitter:image:alt" content="lightmap-uv-channel: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/lod-decimate-chain/index.html b/docs/gallery/lod-decimate-chain/index.html
index 6cacb442..61fe146c 100644
--- a/docs/gallery/lod-decimate-chain/index.html
+++ b/docs/gallery/lod-decimate-chain/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A retro rocket at LOD0/1/2 via the Decimate modifier evaluated through the depsgraph. The check proves the reduction is non-destructive, the triangle count hits ratio x base within bounds, and silhouette-critical dimensions survive." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/lod-decimate-chain/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/lod-decimate-chain-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="lod-decimate-chain: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="lod-decimate-chain — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A retro rocket at LOD0/1/2 via the Decimate modifier evaluated through the depsgraph. The check proves the reduction is non-destructive, the triangle count hits ratio x base within bounds, and silhouette-critical dimensions survive." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/lod-decimate-chain-hero.webp" />
+  <meta name="twitter:image:alt" content="lod-decimate-chain: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/market-stall/index.html b/docs/gallery/market-stall/index.html
index 99fb29be..2f69ba3d 100644
--- a/docs/gallery/market-stall/index.html
+++ b/docs/gallery/market-stall/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural timber market stall through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/market-stall/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/market-stall-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="market-stall: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="market-stall — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural timber market stall through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/market-stall-hero.webp" />
+  <meta name="twitter:image:alt" content="market-stall: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/mesh-hygiene-audit/index.html b/docs/gallery/mesh-hygiene-audit/index.html
index 4478a7f4..16d8f55b 100644
--- a/docs/gallery/mesh-hygiene-audit/index.html
+++ b/docs/gallery/mesh-hygiene-audit/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="Engine-ingest mesh hygiene on an octagonal street valve: no ngons, no loose verts, manifold edges, no zero-area faces, positive signed volume, Euler V-E+F==2. Dual-panel still shows a through-hole and loose-vert bead derived from live mesh incidence — same brass on both so color alone cannot carry the proof." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/mesh-hygiene-audit/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/mesh-hygiene-audit-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="mesh-hygiene-audit: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="mesh-hygiene-audit — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="Engine-ingest mesh hygiene on an octagonal street valve: no ngons, no loose verts, manifold edges, no zero-area faces, positive signed volume, Euler V-E+F==2. Dual-panel still shows a through-hole and loose-vert bead derived from live mesh incidence — same brass on both so color alone cannot carry the proof." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/mesh-hygiene-audit-hero.webp" />
+  <meta name="twitter:image:alt" content="mesh-hygiene-audit: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/modular-kit-snap/index.html b/docs/gallery/modular-kit-snap/index.html
index d1f0374a..f53785c8 100644
--- a/docs/gallery/modular-kit-snap/index.html
+++ b/docs/gallery/modular-kit-snap/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A tiling corridor kit whose open-end boundary verts snap to the tile grid, so instances at 4 m multiples join with zero gap or overlap." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/modular-kit-snap/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/modular-kit-snap-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="modular-kit-snap: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="modular-kit-snap — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A tiling corridor kit whose open-end boundary verts snap to the tile grid, so instances at 4 m multiples join with zero gap or overlap." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/modular-kit-snap-hero.webp" />
+  <meta name="twitter:image:alt" content="modular-kit-snap: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/parent-inverse-orrery/index.html b/docs/gallery/parent-inverse-orrery/index.html
index 2d71d2df..c77ee480 100644
--- a/docs/gallery/parent-inverse-orrery/index.html
+++ b/docs/gallery/parent-inverse-orrery/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="Data-API parenting for a brass orrery — the keep-world idiom (child.parent = pivot; child.matrix_parent_inverse = pivot.matrix_world.inverted()) carrying arms, planets, and a two-level moon through spinning pivots." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/parent-inverse-orrery/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/parent-inverse-orrery-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="parent-inverse-orrery: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="parent-inverse-orrery — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="Data-API parenting for a brass orrery — the keep-world idiom (child.parent = pivot; child.matrix_parent_inverse = pivot.matrix_world.inverted()) carrying arms, planets, and a two-level moon through spinning pivots." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/parent-inverse-orrery-hero.webp" />
+  <meta name="twitter:image:alt" content="parent-inverse-orrery: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/park-bench/index.html b/docs/gallery/park-bench/index.html
index e3b1bc09..191cd420 100644
--- a/docs/gallery/park-bench/index.html
+++ b/docs/gallery/park-bench/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural wrought-iron park bench with tangent tube scroll feet through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/park-bench/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/park-bench-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="park-bench: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="park-bench — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural wrought-iron park bench with tangent tube scroll feet through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/park-bench-hero.webp" />
+  <meta name="twitter:image:alt" content="park-bench: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/png-exr-alpha/index.html b/docs/gallery/png-exr-alpha/index.html
index 7b339f29..4ec01429 100644
--- a/docs/gallery/png-exr-alpha/index.html
+++ b/docs/gallery/png-exr-alpha/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="Float-image PNG save trap — float_buffer=True Image.save() writes RGBA16 and unpremultiplies as if associated-alpha, clamping straight-authored dark values at low alpha to white (closed-form err 0.98 at RGB 0.02 / a=1/255)." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/png-exr-alpha/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/png-exr-alpha-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="png-exr-alpha: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="png-exr-alpha — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="Float-image PNG save trap — float_buffer=True Image.save() writes RGBA16 and unpremultiplies as if associated-alpha, clamping straight-authored dark values at low alpha to white (closed-form err 0.98 at RGB 0.02 / a=1/255)." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/png-exr-alpha-hero.webp" />
+  <meta name="twitter:image:alt" content="png-exr-alpha: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/prop-origin-transform/index.html b/docs/gallery/prop-origin-transform/index.html
index ab38a04a..4a9566df 100644
--- a/docs/gallery/prop-origin-transform/index.html
+++ b/docs/gallery/prop-origin-transform/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="Street pedestal origin-to-base-center + data-API scale apply + matrix_parent_inverse for a flanged conduit accessory. After bake: scale (1,1,1), local min.z==0, world AABB unchanged. Bare parent jumps the accessory off an empty mount socket; MPI keeps it seated." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/prop-origin-transform/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/prop-origin-transform-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="prop-origin-transform: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="prop-origin-transform — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="Street pedestal origin-to-base-center + data-API scale apply + matrix_parent_inverse for a flanged conduit accessory. After bake: scale (1,1,1), local min.z==0, world AABB unchanged. Bare parent jumps the accessory off an empty mount socket; MPI keeps it seated." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/prop-origin-transform-hero.webp" />
+  <meta name="twitter:image:alt" content="prop-origin-transform: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/shader-node-group/index.html b/docs/gallery/shader-node-group/index.html
index 97b7e68b..205dcf18 100644
--- a/docs/gallery/shader-node-group/index.html
+++ b/docs/gallery/shader-node-group/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="One reusable shader group declared via tree.interface.new_socket, instanced in two materials with different Tint values — two spheres, one group, two colors." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/shader-node-group/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/shader-node-group-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="shader-node-group: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="shader-node-group — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="One reusable shader group declared via tree.interface.new_socket, instanced in two materials with different Tint values — two spheres, one group, two colors." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/shader-node-group-hero.webp" />
+  <meta name="twitter:image:alt" content="shader-node-group: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/shape-key-blend/index.html b/docs/gallery/shape-key-blend/index.html
index 13492bb5..a3da30a6 100644
--- a/docs/gallery/shape-key-blend/index.html
+++ b/docs/gallery/shape-key-blend/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A relative Tall shape key that lifts and flares the top face — authored via shape_key_add / key_blocks / .value — read back from the depsgraph-evaluated mesh." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/shape-key-blend/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/shape-key-blend-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="shape-key-blend: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="shape-key-blend — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A relative Tall shape key that lifts and flares the top face — authored via shape_key_add / key_blocks / .value — read back from the depsgraph-evaluated mesh." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/shape-key-blend-hero.webp" />
+  <meta name="twitter:image:alt" content="shape-key-blend: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/shipping-crate/index.html b/docs/gallery/shipping-crate/index.html
index be2695bb..2b13f981 100644
--- a/docs/gallery/shipping-crate/index.html
+++ b/docs/gallery/shipping-crate/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural shipping crate through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/shipping-crate/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/shipping-crate-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="shipping-crate: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="shipping-crate — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural shipping crate through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/shipping-crate-hero.webp" />
+  <meta name="twitter:image:alt" content="shipping-crate: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/signpost/index.html b/docs/gallery/signpost/index.html
index 0970afb4..6d80dd03 100644
--- a/docs/gallery/signpost/index.html
+++ b/docs/gallery/signpost/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural timber fingerboard signpost through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/signpost/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/signpost-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="signpost: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="signpost — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural timber fingerboard signpost through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/signpost-hero.webp" />
+  <meta name="twitter:image:alt" content="signpost: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/sky-texture-sun-elevation/index.html b/docs/gallery/sky-texture-sun-elevation/index.html
index 2e2b54d7..7980c4c7 100644
--- a/docs/gallery/sky-texture-sun-elevation/index.html
+++ b/docs/gallery/sky-texture-sun-elevation/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="World ShaderNodeTexSky driving Background Color — the sky contract across 4.5 LTS and 5.1. sky_type is NISHITA on 4.5 and MULTIPLE_SCATTERING on 5.1 (NISHITA gone); dust_density exists only on 4.5 (aerosol_density on 5.1). Two tiny Cycles OPEN_EXR zenith probes prove sun_elevation 8 deg to 55 deg brightens zenith (rise 2.25x on 5.1.2, 1.50x on 4.5.11, gate &gt;= 1.25)." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/sky-texture-sun-elevation/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/sky-texture-sun-elevation-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="sky-texture-sun-elevation: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="sky-texture-sun-elevation — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="World ShaderNodeTexSky driving Background Color — the sky contract across 4.5 LTS and 5.1. sky_type is NISHITA on 4.5 and MULTIPLE_SCATTERING on 5.1 (NISHITA gone); dust_density exists only on 4.5 (aerosol_density on 5.1). Two tiny Cycles OPEN_EXR zenith probes prove sun_elevation 8 deg to 55 deg brightens zenith (rise 2.25x on 5.1.2, 1.50x on 4.5.11, gate &gt;= 1.25)." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/sky-texture-sun-elevation-hero.webp" />
+  <meta name="twitter:image:alt" content="sky-texture-sun-elevation: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/soccer-ball-goldberg/index.html b/docs/gallery/soccer-ball-goldberg/index.html
index 55224ec1..308cf3d2 100644
--- a/docs/gallery/soccer-ball-goldberg/index.html
+++ b/docs/gallery/soccer-ball-goldberg/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A soccer ball as a Goldberg polyhedron: a bmesh icosphere truncated at 1/3 per edge, faces ordered by link-topology walks, panels bound by face vertex count." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/soccer-ball-goldberg/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/soccer-ball-goldberg-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="soccer-ball-goldberg: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="soccer-ball-goldberg — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A soccer ball as a Goldberg polyhedron: a bmesh icosphere truncated at 1/3 per edge, faces ordered by link-topology walks, panels bound by face vertex count." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/soccer-ball-goldberg-hero.webp" />
+  <meta name="twitter:image:alt" content="soccer-ball-goldberg: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/socket-attach-points/index.html b/docs/gallery/socket-attach-points/index.html
index d3faf698..20f0da80 100644
--- a/docs/gallery/socket-attach-points/index.html
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   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/socket-attach-points-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="socket-attach-points: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="socket-attach-points — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A survey drone whose named SKT_ empties are the spawn contract: modules parented with an identity local transform seat exactly on their mount pads." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/socket-attach-points-hero.webp" />
+  <meta name="twitter:image:alt" content="socket-attach-points: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/stone-archway/index.html b/docs/gallery/stone-archway/index.html
index 8e71bb52..4a239b39 100644
--- a/docs/gallery/stone-archway/index.html
+++ b/docs/gallery/stone-archway/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural masonry archway — coursed piers, projecting imposts, nine voussoirs and a proud keystone — carried through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/stone-archway/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/stone-archway-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="stone-archway: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="stone-archway — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural masonry archway — coursed piers, projecting imposts, nine voussoirs and a proud keystone — carried through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/stone-archway-hero.webp" />
+  <meta name="twitter:image:alt" content="stone-archway: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/stone-well/index.html b/docs/gallery/stone-well/index.html
index 793bb1fe..255033a6 100644
--- a/docs/gallery/stone-well/index.html
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   <meta property="og:description" content="A procedural stone well through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
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   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/stone-well-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="stone-well: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="stone-well — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural stone well through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/stone-well-hero.webp" />
+  <meta name="twitter:image:alt" content="stone-well: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/street-lantern/index.html b/docs/gallery/street-lantern/index.html
index 287f70b6..1a7ce236 100644
--- a/docs/gallery/street-lantern/index.html
+++ b/docs/gallery/street-lantern/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural hanging street lantern through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
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   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/street-lantern-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="street-lantern: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="street-lantern — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural hanging street lantern through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/street-lantern-hero.webp" />
+  <meta name="twitter:image:alt" content="street-lantern: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/swatch-grid/index.html b/docs/gallery/swatch-grid/index.html
index d8871ee9..ed2895fc 100644
--- a/docs/gallery/swatch-grid/index.html
+++ b/docs/gallery/swatch-grid/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="Procedural Principled materials — metal and dielectric, the emission pattern, and the cross-version set_specular shim." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/swatch-grid/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/swatch-grid-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="swatch-grid: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="swatch-grid — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="Procedural Principled materials — metal and dielectric, the emission pattern, and the cross-version set_specular shim." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/swatch-grid-hero.webp" />
+  <meta name="twitter:image:alt" content="swatch-grid: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/tavern-stool/index.html b/docs/gallery/tavern-stool/index.html
index 773df4cb..95a0e54e 100644
--- a/docs/gallery/tavern-stool/index.html
+++ b/docs/gallery/tavern-stool/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural tavern stool with a lathed seat, turned splayed legs, tenoned stretchers, and iron ferrule cups through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/tavern-stool/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/tavern-stool-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="tavern-stool: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="tavern-stool — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural tavern stool with a lathed seat, turned splayed legs, tenoned stretchers, and iron ferrule cups through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/tavern-stool-hero.webp" />
+  <meta name="twitter:image:alt" content="tavern-stool: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/temp-override-join/index.html b/docs/gallery/temp-override-join/index.html
index 676cdbbb..9703ccc4 100644
--- a/docs/gallery/temp-override-join/index.html
+++ b/docs/gallery/temp-override-join/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="Join three unit cubes into a staircase under bpy.context.temp_override — the supported replacement for the removed context.copy() dict-pass form." />
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   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/temp-override-join-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="temp-override-join: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="temp-override-join — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="Join three unit cubes into a staircase under bpy.context.temp_override — the supported replacement for the removed context.copy() dict-pass form." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/temp-override-join-hero.webp" />
+  <meta name="twitter:image:alt" content="temp-override-join: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/terrain-scatter/index.html b/docs/gallery/terrain-scatter/index.html
index ee480e9c..e50cf389 100644
--- a/docs/gallery/terrain-scatter/index.html
+++ b/docs/gallery/terrain-scatter/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A Geometry Nodes hill tile with seated icosphere scatter through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
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   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/terrain-scatter-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="terrain-scatter: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="terrain-scatter — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A Geometry Nodes hill tile with seated icosphere scatter through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/terrain-scatter-hero.webp" />
+  <meta name="twitter:image:alt" content="terrain-scatter: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/text-version-stamp/index.html b/docs/gallery/text-version-stamp/index.html
index 948c6fb6..40698c55 100644
--- a/docs/gallery/text-version-stamp/index.html
+++ b/docs/gallery/text-version-stamp/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="The TextCurve data API — curves.new(type=&#x27;FONT&#x27;), live body text from bpy.app.version_string, extrude and bevel_depth solids, and evaluated-mesh conversion — so every render self-documents which Blender produced it." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/text-version-stamp/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/text-version-stamp-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="text-version-stamp: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="text-version-stamp — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="The TextCurve data API — curves.new(type=&#x27;FONT&#x27;), live body text from bpy.app.version_string, extrude and bevel_depth solids, and evaluated-mesh conversion — so every render self-documents which Blender produced it." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/text-version-stamp-hero.webp" />
+  <meta name="twitter:image:alt" content="text-version-stamp: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/treasure-chest/index.html b/docs/gallery/treasure-chest/index.html
index e60e8016..31198456 100644
--- a/docs/gallery/treasure-chest/index.html
+++ b/docs/gallery/treasure-chest/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural iron-bound chest with a lofted barrel-vault lid, U-wrap bands, and hinge knuckles through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/treasure-chest/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/treasure-chest-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="treasure-chest: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="treasure-chest — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural iron-bound chest with a lofted barrel-vault lid, U-wrap bands, and hinge knuckles through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/treasure-chest-hero.webp" />
+  <meta name="twitter:image:alt" content="treasure-chest: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/triangulate-tangents/index.html b/docs/gallery/triangulate-tangents/index.html
index f6f71868..c5295c42 100644
--- a/docs/gallery/triangulate-tangents/index.html
+++ b/docs/gallery/triangulate-tangents/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A machined buckler verifying the tangent-space contract a game engine&#x27;s normal mapping depends on. Deterministic triangulation, unit orthogonal tangent frames, and the edge/UV-delta formula matching mikktspace within welding tolerance." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/triangulate-tangents/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/triangulate-tangents-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="triangulate-tangents: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="triangulate-tangents — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A machined buckler verifying the tangent-space contract a game engine&#x27;s normal mapping depends on. Deterministic triangulation, unit orthogonal tangent frames, and the edge/UV-delta formula matching mikktspace within welding tolerance." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/triangulate-tangents-hero.webp" />
+  <meta name="twitter:image:alt" content="triangulate-tangents: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/turntable/index.html b/docs/gallery/turntable/index.html
index 3dde05d3..96f0c84d 100644
--- a/docs/gallery/turntable/index.html
+++ b/docs/gallery/turntable/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A slotted-actions Z-rotation turntable keyed through the cross-version channelbag path (get_channelbag_for_slot)." />
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   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/turntable-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="turntable: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="turntable — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A slotted-actions Z-rotation turntable keyed through the cross-version channelbag path (get_channelbag_for_slot)." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/turntable-hero.webp" />
+  <meta name="twitter:image:alt" content="turntable: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/usd-export-evaluation-mode/index.html b/docs/gallery/usd-export-evaluation-mode/index.html
index 76686ca9..024b727f 100644
--- a/docs/gallery/usd-export-evaluation-mode/index.html
+++ b/docs/gallery/usd-export-evaluation-mode/index.html
@@ -14,10 +14,15 @@
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   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/usd-export-evaluation-mode-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="usd-export-evaluation-mode: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="usd-export-evaluation-mode — Examples — Blender Developer Tools" />
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   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/usd-export-evaluation-mode-hero.webp" />
+  <meta name="twitter:image:alt" content="usd-export-evaluation-mode: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/uv-layer-grid/index.html b/docs/gallery/uv-layer-grid/index.html
index b2134cc1..45766445 100644
--- a/docs/gallery/uv-layer-grid/index.html
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   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/uv-layer-grid-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="uv-layer-grid: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="uv-layer-grid — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="The UV-layer authoring hazard — bmesh.ops.create_grid(..., calc_uvs=True) is a silent no-op unless a UV layer already exists; without one an Image Texture samples texel (0,0) everywhere." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/uv-layer-grid-hero.webp" />
+  <meta name="twitter:image:alt" content="uv-layer-grid: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/vertex-color-ao/index.html b/docs/gallery/vertex-color-ao/index.html
index 7dafe494..d8931150 100644
--- a/docs/gallery/vertex-color-ao/index.html
+++ b/docs/gallery/vertex-color-ao/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A stone well carrying baked ambient occlusion in a colour attribute, with the bake held to the closed-form hemisphere integral rather than to a captured value." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/vertex-color-ao/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/vertex-color-ao-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="vertex-color-ao: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="vertex-color-ao — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A stone well carrying baked ambient occlusion in a colour attribute, with the bake held to the closed-form hemisphere integral rather than to a captured value." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/vertex-color-ao-hero.webp" />
+  <meta name="twitter:image:alt" content="vertex-color-ao: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/vertex-weight-limit/index.html b/docs/gallery/vertex-weight-limit/index.html
index dc074ef0..06288774 100644
--- a/docs/gallery/vertex-weight-limit/index.html
+++ b/docs/gallery/vertex-weight-limit/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A rigged mech arm pruned to the game-engine cap of four bone influences per vertex, through the data API. The check proves no vertex exceeds the cap, weights still sum to one, the pose survives pruning, and the modifier is still exact linear blend skinning." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/vertex-weight-limit/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/vertex-weight-limit-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="vertex-weight-limit: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="vertex-weight-limit — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="A rigged mech arm pruned to the game-engine cap of four bone influences per vertex, through the data API. The check proves no vertex exceeds the cap, weights still sum to one, the pose survives pruning, and the modifier is still exact linear blend skinning." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/vertex-weight-limit-hero.webp" />
+  <meta name="twitter:image:alt" content="vertex-weight-limit: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/vse-cut-list/index.html b/docs/gallery/vse-cut-list/index.html
index 7ef29aaa..dc151b97 100644
--- a/docs/gallery/vse-cut-list/index.html
+++ b/docs/gallery/vse-cut-list/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="The sequencer API rename from 4.5 LTS to 5.x — strips (never .sequences), new_effect ending in length= vs frame_end=, and left_handle/right_handle/duration replacing the deprecated frame_final_*. A deterministic cut list — color programs, a clamped GAMMA_CROSS, a scene strip, a text strip — asserted before and after save/reload." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/vse-cut-list/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/vse-cut-list-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="vse-cut-list: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="vse-cut-list — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="The sequencer API rename from 4.5 LTS to 5.x — strips (never .sequences), new_effect ending in length= vs frame_end=, and left_handle/right_handle/duration replacing the deprecated frame_final_*. A deterministic cut list — color programs, a clamped GAMMA_CROSS, a scene strip, a text strip — asserted before and after save/reload." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/vse-cut-list-hero.webp" />
+  <meta name="twitter:image:alt" content="vse-cut-list: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/vse-gamma-cross/index.html b/docs/gallery/vse-gamma-cross/index.html
index 245f792e..b082ecd4 100644
--- a/docs/gallery/vse-gamma-cross/index.html
+++ b/docs/gallery/vse-gamma-cross/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="The GAMMA_CROSS fade is not the naive linear mix: it blends in a gamma-0.5 space, so the mid-cross dips below the sRGB lerp. Tiny per-frame renders are asserted against the closed form per frame." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/vse-gamma-cross/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/vse-gamma-cross-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="vse-gamma-cross: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="vse-gamma-cross — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="The GAMMA_CROSS fade is not the naive linear mix: it blends in a gamma-0.5 space, so the mid-cross dips below the sRGB lerp. Tiny per-frame renders are asserted against the closed form per frame." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/vse-gamma-cross-hero.webp" />
+  <meta name="twitter:image:alt" content="vse-gamma-cross: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/wall-torch/index.html b/docs/gallery/wall-torch/index.html
index c24d070d..a1336816 100644
--- a/docs/gallery/wall-torch/index.html
+++ b/docs/gallery/wall-torch/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural wall-mounted torch sconce with a dressed stone plaque, iron bracket, wooden haft, and emissive flame through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/wall-torch/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/wall-torch-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="wall-torch: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="wall-torch — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural wall-mounted torch sconce with a dressed stone plaque, iron bracket, wooden haft, and emissive flame through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/wall-torch-hero.webp" />
+  <meta name="twitter:image:alt" content="wall-torch: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/watchtower/index.html b/docs/gallery/watchtower/index.html
index 50b7920f..c461e5df 100644
--- a/docs/gallery/watchtower/index.html
+++ b/docs/gallery/watchtower/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural timber watchtower through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/watchtower/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/watchtower-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="watchtower: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="watchtower — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural timber watchtower through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/watchtower-hero.webp" />
+  <meta name="twitter:image:alt" content="watchtower: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/water-trough/index.html b/docs/gallery/water-trough/index.html
index e37dc3ab..a7b67ba3 100644
--- a/docs/gallery/water-trough/index.html
+++ b/docs/gallery/water-trough/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural watertight water trough through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/water-trough/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/water-trough-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="water-trough: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="water-trough — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural watertight water trough through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/water-trough-hero.webp" />
+  <meta name="twitter:image:alt" content="water-trough: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/wave-displace/index.html b/docs/gallery/wave-displace/index.html
index dd6de8a9..29c58bf3 100644
--- a/docs/gallery/wave-displace/index.html
+++ b/docs/gallery/wave-displace/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="Bulk vertex IO at real scale — 9,409 vertices displaced into a standing wave with one foreach_get and one foreach_set, no per-vertex access." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/wave-displace/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/wave-displace-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="wave-displace: the example&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="wave-displace — Examples — Blender Developer Tools" />
   <meta name="twitter:description" content="Bulk vertex IO at real scale — 9,409 vertices displaced into a standing wave with one foreach_get and one foreach_set, no per-vertex access." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/wave-displace-hero.webp" />
+  <meta name="twitter:image:alt" content="wave-displace: the example&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/wheelbarrow/index.html b/docs/gallery/wheelbarrow/index.html
index 6ac0a725..7a56848b 100644
--- a/docs/gallery/wheelbarrow/index.html
+++ b/docs/gallery/wheelbarrow/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural wooden wheelbarrow through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/wheelbarrow/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/wheelbarrow-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="wheelbarrow: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="wheelbarrow — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural wooden wheelbarrow through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/wheelbarrow-hero.webp" />
+  <meta name="twitter:image:alt" content="wheelbarrow: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/wooden-barrel/index.html b/docs/gallery/wooden-barrel/index.html
index 9b3d6640..2d6c094f 100644
--- a/docs/gallery/wooden-barrel/index.html
+++ b/docs/gallery/wooden-barrel/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural wine-cask with croze-seated heads and chord-lofted hoops through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/wooden-barrel/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/wooden-barrel-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="wooden-barrel: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="wooden-barrel — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural wine-cask with croze-seated heads and chord-lofted hoops through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/wooden-barrel-hero.webp" />
+  <meta name="twitter:image:alt" content="wooden-barrel: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/wooden-bucket/index.html b/docs/gallery/wooden-bucket/index.html
index 18818e64..07e37512 100644
--- a/docs/gallery/wooden-bucket/index.html
+++ b/docs/gallery/wooden-bucket/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural coopered pail with a croze-seated floor, chord-lofted hoops, and a round bail through the ear rings through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/wooden-bucket/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/wooden-bucket-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="wooden-bucket: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="wooden-bucket — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural coopered pail with a croze-seated floor, chord-lofted hoops, and a round bail through the ear rings through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/wooden-bucket-hero.webp" />
+  <meta name="twitter:image:alt" content="wooden-bucket: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/docs/gallery/wooden-ladder/index.html b/docs/gallery/wooden-ladder/index.html
index c7b1ee80..c45dd490 100644
--- a/docs/gallery/wooden-ladder/index.html
+++ b/docs/gallery/wooden-ladder/index.html
@@ -14,10 +14,15 @@
   <meta property="og:description" content="A procedural timber ladder with raked tapered stiles, six turned rungs, ferrule caps, and level shoe plates through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta property="og:url" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/wooden-ladder/" />
   <meta property="og:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/wooden-ladder-hero.webp" />
+  <meta property="og:image:width" content="1280" />
+  <meta property="og:image:height" content="720" />
+  <meta property="og:image:alt" content="wooden-ladder: the showcase piece&#x27;s own headless render" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="wooden-ladder — Showcase — Blender Developer Tools" />
   <meta name="twitter:description" content="A procedural timber ladder with raked tapered stiles, six turned rungs, ferrule caps, and level shoe plates through UVs, bake, LOD, collider, and Unity glTF, asserting recomputed budgets rather than an API contract." />
   <meta name="twitter:image" content="https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/wooden-ladder-hero.webp" />
+  <meta name="twitter:image:alt" content="wooden-ladder: the showcase piece&#x27;s own headless render" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/scripts/build_gallery.py b/scripts/build_gallery.py
index 9a6f5e2d..521892ac 100644
--- a/scripts/build_gallery.py
+++ b/scripts/build_gallery.py
@@ -43,6 +43,12 @@
 SHOWCASE_DATA = REPO / "showcase" / "gallery.json"
 OUT_DIR = REPO / "docs" / "gallery"
 
+# Social card for the gallery index, shared with the landing page (site.json).
+OG_CARD_SIZE = (1200, 630)
+OG_CARD_ALT = ("Four renders from the examples gallery: a red low-poly hatchback, a soccer "
+               "ball, gold spikes aimed at a glowing sphere, and two spheres on pedestals "
+               "labelled linked and unlinked")
+
 # Soft cap for gallery index card alt text (accessibility + layout).
 _ALT_CAP = 160
 
@@ -145,10 +151,15 @@ def assert_alts_survive_dotted_paths(examples: list) -> None:
   <meta property="og:description" content="__DESC__" />
   <meta property="og:url" content="__CANONICAL__" />
   <meta property="og:image" content="__OGIMAGE__" />
+  <meta property="og:image:width" content="__OGW__" />
+  <meta property="og:image:height" content="__OGH__" />
+  <meta property="og:image:alt" content="__OGALT__" />
+  <meta property="og:site_name" content="Blender Developer Tools" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="__TITLE__" />
   <meta name="twitter:description" content="__DESC__" />
   <meta name="twitter:image" content="__OGIMAGE__" />
+  <meta name="twitter:image:alt" content="__OGALT__" />
   <style>
     /* fonts are deployed by the landing build (docs/fonts/) */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
@@ -838,6 +849,7 @@ def resolve(url: str) -> str:
 
 
 def shell(*, title: str, desc: str, canonical: str, og_image: str,
+          og_size: tuple[int, int], og_alt: str,
           site_root: str, back_href: str, back_label: str, repo_url: str,
           content: str, page_js: str, head_js: str = "",
           sources: tuple[str, ...] = ("examples/gallery.json",)) -> str:
@@ -846,6 +858,9 @@ def shell(*, title: str, desc: str, canonical: str, og_image: str,
             .replace("__DESC__", html.escape(desc, quote=True))
             .replace("__CANONICAL__", html.escape(canonical, quote=True))
             .replace("__OGIMAGE__", html.escape(og_image, quote=True))
+            .replace("__OGW__", str(og_size[0]))
+            .replace("__OGH__", str(og_size[1]))
+            .replace("__OGALT__", html.escape(og_alt, quote=True))
             .replace("__SITEROOT__", site_root)
             .replace("__BACKHREF__", back_href)
             .replace("__BACKLABEL__", html.escape(back_label))
@@ -915,6 +930,8 @@ def build_detail(ex: dict, *, base: str, repo_root_url: str, site: str) -> str:
         desc=ex["teaches"],
         canonical=f"{site}/gallery/{name}/" if site else "",
         og_image=f"{site}/gallery/assets/{hero_file}" if site else "",
+        og_size=(1280, 720),
+        og_alt=f"{name}: the {noun}'s own headless render",
         site_root="../../",
         back_href="../",
         back_label="Examples and Showcase",
@@ -1007,12 +1024,15 @@ def build_index(data: dict, *, base: str, repo_root_url: str, site: str) -> str:
         + '  <button class="to-top" id="toTop" type="button"><span aria-hidden="true">&uarr;</span> Top</button>'
     )
 
-    og_image = f"{site}/gallery/assets/{page_relative(examples[0]['hero']).split('/')[-1]}" if site else ""
+    # The landing build copies repo-root assets/ (og-card.jpg included) to docs/assets/.
+    # A 1200x630 JPEG is the size and format every link-preview scraper accepts.
     return shell(
         title=f"{title} — Blender Developer Tools",
         desc=desc,
         canonical=f"{site}/gallery/" if site else "",
-        og_image=og_image,
+        og_image=f"{site}/assets/og-card.jpg" if site else "",
+        og_size=OG_CARD_SIZE,
+        og_alt=OG_CARD_ALT,
         site_root="../",
         back_href="../",
         back_label="Blender Developer Tools",
diff --git a/scripts/site/fonts/barlow-condensed-500.woff2 b/scripts/site/fonts/barlow-condensed-500.woff2
index e30e2395..a96d02f7 100644
Binary files a/scripts/site/fonts/barlow-condensed-500.woff2 and b/scripts/site/fonts/barlow-condensed-500.woff2 differ
diff --git a/scripts/site/fonts/barlow-condensed-600.woff2 b/scripts/site/fonts/barlow-condensed-600.woff2
index da60c9a9..b0b96160 100644
Binary files a/scripts/site/fonts/barlow-condensed-600.woff2 and b/scripts/site/fonts/barlow-condensed-600.woff2 differ
diff --git a/scripts/site/fonts/inter-bold.woff2 b/scripts/site/fonts/inter-bold.woff2
index b9e3cb3b..d387c3cb 100644
Binary files a/scripts/site/fonts/inter-bold.woff2 and b/scripts/site/fonts/inter-bold.woff2 differ
diff --git a/scripts/site/fonts/inter-medium.woff2 b/scripts/site/fonts/inter-medium.woff2
index fdfdcc69..a0f2b673 100644
Binary files a/scripts/site/fonts/inter-medium.woff2 and b/scripts/site/fonts/inter-medium.woff2 differ
diff --git a/scripts/site/fonts/inter-regular.woff2 b/scripts/site/fonts/inter-regular.woff2
index 2bcd222e..dbadf905 100644
Binary files a/scripts/site/fonts/inter-regular.woff2 and b/scripts/site/fonts/inter-regular.woff2 differ
diff --git a/scripts/site/fonts/jetbrains-mono-regular.woff2 b/scripts/site/fonts/jetbrains-mono-regular.woff2
index 66c54672..0a16dc6f 100644
Binary files a/scripts/site/fonts/jetbrains-mono-regular.woff2 and b/scripts/site/fonts/jetbrains-mono-regular.woff2 differ
diff --git a/scripts/site/template.html.j2 b/scripts/site/template.html.j2
index 707aaa2b..03a13529 100644
--- a/scripts/site/template.html.j2
+++ b/scripts/site/template.html.j2
@@ -14,13 +14,24 @@
   <meta property="og:description" content="{{ plugin.description }}" />
   {% if site.canonical %}<meta property="og:url" content="{{ site.canonical }}" />{% endif %}
   {% set og_image = site.ogImage | default('', true) %}
-  {% if og_image %}<meta property="og:image" content="{{ og_image }}" />{% endif %}
+  {% if og_image %}<meta property="og:image" content="{{ og_image }}" />
+  {% if site.ogImageWidth %}<meta property="og:image:width" content="{{ site.ogImageWidth }}" />
+  <meta property="og:image:height" content="{{ site.ogImageHeight }}" />{% endif %}
+  {% if site.ogImageAlt %}<meta property="og:image:alt" content="{{ site.ogImageAlt }}" />{% endif %}{% endif %}
+  <meta property="og:site_name" content="{{ plugin.displayName }}" />
   <meta name="twitter:card" content="summary_large_image" />
   <meta name="twitter:title" content="{{ plugin.displayName }} — Blender Python that actually runs" />
   <meta name="twitter:description" content="{{ plugin.description }}" />
-  {% if og_image %}<meta name="twitter:image" content="{{ og_image }}" />{% endif %}
+  {% if og_image %}<meta name="twitter:image" content="{{ og_image }}" />
+  {% if site.ogImageAlt %}<meta name="twitter:image:alt" content="{{ site.ogImageAlt }}" />{% endif %}{% endif %}
   <style>
-    /* ---- fonts (self-hosted, copied to docs/fonts/ by build_site.py) ---- */
+    /* ---- fonts (self-hosted, copied to docs/fonts/ by build_site.py) ----
+       Subset to the code points the built pages use plus Latin-1 and General
+       Punctuation (#216); a character outside that set falls back to the next
+       family in the stack. To re-subset after content adds new symbols, collect
+       the pages' characters into a U+XXXX list and run, per original font:
+       python -m fontTools.subset ORIG.woff2 --unicodes-file=LIST
+         --layout-features='*' --flavor=woff2 --output-file=fonts/NAME.woff2 */
     @font-face { font-family: 'Barlow Condensed'; font-weight: 500; font-display: swap;
       src: url('fonts/barlow-condensed-500.woff2') format('woff2'); }
     @font-face { font-family: 'Barlow Condensed'; font-weight: 600; font-display: swap;
diff --git a/site.json b/site.json
index da80091a..b4c448f5 100644
--- a/site.json
+++ b/site.json
@@ -1,7 +1,10 @@
 {
   "canonical": "https://tmhsdigital.github.io/Blender-Developer-Tools/",
   "favicon": "assets/favicon.svg",
-  "ogImage": "https://tmhsdigital.github.io/Blender-Developer-Tools/gallery/assets/swatch-grid-hero.webp",
+  "ogImage": "https://tmhsdigital.github.io/Blender-Developer-Tools/assets/og-card.jpg",
+  "ogImageWidth": 1200,
+  "ogImageHeight": 630,
+  "ogImageAlt": "Four renders from the examples gallery: a red low-poly hatchback, a soccer ball, gold spikes aimed at a glowing sphere, and two spheres on pedestals labelled linked and unlinked",
   "compatibility": {
     "claude": "Claude Code",
     "os": ["Windows", "macOS", "Linux"]