diff --git a/docs/superpowers/specs/2026-03-31-image-resize-design.md b/docs/superpowers/specs/2026-03-31-image-resize-design.md
index 4cfaa095..66a8604c 100644
--- a/docs/superpowers/specs/2026-03-31-image-resize-design.md
+++ b/docs/superpowers/specs/2026-03-31-image-resize-design.md
@@ -16,34 +16,34 @@ ## Platform Media Specifications (from official docs)
 
 ### Images
 
-| Platform | Max Size | Formats | Max Resolution | Aspect Ratio | Notes |
+| Platform | Max Size | Formats | Max Resolution | Aspect Ratio | Source |
 |---|---|---|---|---|---|
-| **Instagram** | 8 MB | JPEG only | 1440px width | 4:5 to 1.91:1 | sRGB color space; min 320px width |
-| **Facebook** | 4 MB (PNG: 1 MB) | JPEG, PNG, BMP, GIF, TIFF | No hard limit | No limit | Auto-resized by Facebook |
-| **X/Twitter** | 5 MB | JPG, PNG, GIF, WEBP | No hard limit | No limit | GIFs: max 15 MB, 1280x1080, 350 frames |
-| **TikTok** | 20 MB | JPEG, WebP | 1080px max | No limit | Photos only for photo posts |
-| **YouTube** | N/A | N/A | N/A | N/A | Video only — no image posts |
-| **LinkedIn** | < 36M pixels | JPG, GIF, PNG | < 36,152,320 pixels | No limit | GIF: max 250 frames |
-| **Threads** | 8 MB | JPEG | Same as Instagram | Same as Instagram | Uses Instagram Graph API |
-| **Pinterest** | 20 MB | JPG, PNG | 1000px recommended | 2:3 recommended | |
-| **Bluesky** | 1 MB | Any | No limit | No limit | Hard 1MB limit per blob |
-| **Mastodon** | Instance-dependent (usually 10 MB) | JPG, PNG, GIF, WebP | No hard limit | No limit | Varies by instance |
+| **Instagram** | 8 MB | JPEG only | 1440px width, min 320px | 4:5 to 1.91:1 | [Official](https://developers.facebook.com/docs/instagram-platform/instagram-graph-api/reference/ig-user/media) |
+| **Facebook** | 4 MB (PNG: 1 MB rec.) | JPEG, PNG, BMP, GIF, TIFF | Auto-resized | No limit | [Official](https://developers.facebook.com/docs/graph-api/reference/page/photos/) |
+| **X/Twitter** | 5 MB | JPG, PNG, GIF, WEBP | No hard limit | No limit | [Official](https://docs.x.com/x-api/media/quickstart/best-practices) |
+| **TikTok** | 20 MB | JPEG, WebP | 1080px max | No limit | [Official](https://developers.tiktok.com/doc/content-posting-api-media-transfer-guide) |
+| **YouTube** | N/A | N/A | N/A | N/A | Video only |
+| **LinkedIn** | < 36M pixels | JPG, GIF, PNG | < 36,152,320 pixels total | No limit | [Official](https://learn.microsoft.com/en-us/linkedin/marketing/community-management/shares/images-api) |
+| **Threads** | 8 MB | JPEG only | Same as Instagram | Same as Instagram | Same API as Instagram |
+| **Pinterest** | 20 MB (desktop), 32 MB (app) | PNG, JPEG | 1000x1500 recommended | 2:3 recommended | [Official](https://help.pinterest.com/en/business/article/pinterest-product-specs) |
+| **Bluesky** | 1 MB | Any | No hard limit | No limit | [Official](https://docs.bsky.app/docs/advanced-guides/posts) |
+| **Mastodon** | Instance-dependent (~10 MB) | JPG, PNG, GIF, WebP | No hard limit | No limit | [Official](https://docs.joinmastodon.org/methods/statuses/) |
 
 ### Videos
 
-| Platform | Max Size | Formats | Codec | Max Resolution | Duration | Aspect Ratio |
-|---|---|---|---|---|---|---|
-| **Instagram Feed** | 100 MB | MP4, MOV | H.264/HEVC | 1920px | 3s-60min | 4:5 to 1.91:1 |
-| **Instagram Reel** | 300 MB | MP4, MOV | H.264/HEVC | 1920px | 3s-15min | 9:16 recommended |
-| **Instagram Story** | 100 MB | MP4, MOV | H.264/HEVC | 1920px | 3-60s | 9:16 recommended |
-| **Facebook** | 2 GB | MP4 | H.264 | No limit | 1s-40min | No limit |
-| **X/Twitter** | 512 MB | MP4 | H.264 High | 1280x1024 | 0.5-140s | 1:3 to 3:1 |
-| **TikTok** | 4 GB | MP4, WebM, MOV | H.264/H.265/VP8/VP9 | 4096px | Up to 10min | No limit |
-| **YouTube** | 128 GB | MP4, MOV, AVI, WebM, etc. | H.264 recommended | No limit | Up to 12h | No limit |
-| **LinkedIn** | 200 MB | MP4 | H.264 | No limit | 3s-10min | No limit |
-| **Pinterest** | 2 GB | MP4 | H.264 | 1080px | 4s-15min | 1:2 to 1.91:1 |
-| **Bluesky** | 50 MB | MP4 | H.264 | 1920px | Up to 60s | No limit |
-| **Mastodon** | Instance-dependent (usually 40 MB) | MP4, WebM | H.264/VP9 | No limit | No limit | No limit |
+| Platform | Max Size | Formats | Codec | Max Resolution | Duration | Aspect Ratio | Source |
+|---|---|---|---|---|---|---|---|
+| **Instagram Feed** | 100 MB | MP4, MOV | H.264/HEVC | 1920px | 3s-60min | 4:5 to 1.91:1 | [Official](https://developers.facebook.com/docs/instagram-platform/instagram-graph-api/reference/ig-user/media) |
+| **Instagram Reel** | 300 MB | MP4, MOV | H.264/HEVC | 1920px | 3s-15min | 9:16 rec. | [Official](https://developers.facebook.com/docs/instagram-platform/instagram-graph-api/reference/ig-user/media) |
+| **Instagram Story** | 100 MB | MP4, MOV | H.264/HEVC | 1920px | 3-60s | 9:16 rec. | [Official](https://developers.facebook.com/docs/instagram-platform/instagram-graph-api/reference/ig-user/media) |
+| **Facebook** | 2 GB | MP4 | H.264 | No limit | 1s-40min | No limit | [Official](https://developers.facebook.com/docs/video-api/reference/error-codes/) |
+| **X/Twitter** | 512 MB | MP4 | H.264 High | 1280x1024 | 0.5-140s | 1:3 to 3:1 | [Official](https://docs.x.com/x-api/media/quickstart/best-practices) |
+| **TikTok** | 4 GB | MP4, WebM, MOV | H.264/H.265/VP8/VP9 | 4096px | Up to 10min | No limit | [Official](https://developers.tiktok.com/doc/content-posting-api-media-transfer-guide) |
+| **YouTube** | 128 GB | MP4, MOV, AVI, WebM+ | H.264 rec. | No limit | Up to 12h | No limit | [Official](https://developers.google.com/youtube/v3/docs/videos/insert) |
+| **LinkedIn** | 500 MB | MP4 | H.264 | No limit | 3s-30min | No limit | [Official](https://learn.microsoft.com/en-us/linkedin/marketing/community-management/shares/videos-api) |
+| **Pinterest** | 2 GB | MP4, MOV, M4V | H.264/H.265 | No limit | 4s-15min | 1:2 to 1.91:1 | [Official](https://help.pinterest.com/en/business/article/pinterest-product-specs) |
+| **Bluesky** | 50 MB | MP4 | H.264 | 1920px | Up to 60s | No limit | [Official](https://docs.bsky.app/docs/advanced-guides/posts) |
+| **Mastodon** | Instance-dependent (~40 MB) | MP4, WebM | H.264/VP9 | No limit | No limit | No limit | [Official](https://docs.joinmastodon.org/methods/statuses/) |
 
 ## Architecture