Changelog 2026-03-03 (Per-Post Social Cards + OG Defaults Pass 2)

Mar 3, 2026

Changed

• Added a cleaner social image fallback chain in baseof.html with support for per-post social_card overrides.
• Added defaultSocialImage site param support in config/_default/params.toml for centralized OG default control.
• Added *og* page-resource lookup in metadata fallback sequence.
• Added og:image:alt and twitter:image:alt output using social_image_alt / image_alt / title fallback.
• Updated post archetype fields to include social_card and social_image_alt for easier per-post authoring.

Why

• Ensure social previews are predictable by default while making per-post cards straightforward to set and more accessible.