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social.md

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+# Social Media Image Exports
+
+Platform UIs change often. Use these as high-confidence working defaults, then recheck the final platform uploader when a campaign is high stakes.
+
+## Core Sizes
+
+| Platform | Format | Dimensions | Notes |
+|----------|--------|------------|-------|
+| Instagram feed portrait | 4:5 | 1080 × 1350 | Strong default for feed reach |
+| Instagram story / reel cover | 9:16 | 1080 × 1920 | Keep key content away from edges |
+| X card image | 1.91:1 | 1200 × 628 | Safer for link previews |
+| LinkedIn feed square | 1:1 | 1200 × 1200 | Clean default for mixed content |
+| Facebook feed image | 1.91:1 | 1200 × 630 | Common share preview shape |
+| YouTube thumbnail | 16:9 | 1280 × 720 | Text must stay legible at small size |
+| Pinterest pin | 2:3 | 1000 × 1500 | Standard pin ratio |
+| OG / social preview card | 1.91:1 | 1200 × 630 | Safe default for link previews and embeds |
+
+## Safe-Zone Rules
+
+- Keep essential text, faces, logos, and product edges away from the outer margins.
+- Story and reel formats need wider top/bottom safety because UI chrome overlays them.
+- Banners and headers crop unpredictably across desktop and mobile.
+- A technically correct size can still fail if the real focal point sits too close to an edge.
+
+## Social Export Rules
+
+- Use RGB and sRGB.
+- Avoid tiny text that only works in the full-resolution editor view.
+- Compress enough to upload fast, but not so hard that gradients, skin, or text show visible damage.
+- If text matters, validate legibility on a small preview, not only at full size.
+- Platform uploaders often recompress again, so leave enough quality headroom for the second pass.
+- Thumbnail crops and in-feed previews may differ from the full asset view, so verify the preview state the audience actually sees.
+- If the same campaign must ship to multiple platforms, export per platform rather than trusting one master crop to survive everywhere.
+
+## Content Guidance
+
+- Put the main subject, offer, or headline in the central safe area.
+- Do not rely on corner badges, tiny logos, or edge-aligned text surviving previews.
+- Faces, products, and callouts need more breathing room in stories, reels, and banners than in square feed posts.
+- The real first impression is often the tiny preview tile, not the full-screen asset; optimize for that moment too.
+
+## Quick Checks
+
+```
+□ Correct aspect ratio
+□ Key content centered within a safe area
+□ Text readable on mobile
+□ No edge-cropped logos or faces
+□ Exported in RGB/sRGB
+```