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v1.5.5 - Bulk Thumbnail Migration to WebP 🖼️

Released: Feb 5, 2026

Summary

Migrated all 98 talk thumbnails to consistent 1280×720 WebP format via a one-time script, including support for external URLs from YouTube/TED CDN.

Features

Bulk Thumbnail Migration Script

Created scripts/upscale-existing-thumbnails.ts for one-time migration
Processes both Supabase-hosted and external URL thumbnails
Converts all images to 1280×720 WebP format
Archives original JPG files to _archive/YYYY-MM-DD/ subfolder before processing
Includes comprehensive validation tests before migration
Supports --dry-run, --test, and --limit=N flags for safe testing

External URL Support

Script now downloads thumbnails from external sources (YouTube, TED CDN)
Uploads processed images to Supabase Storage
Updates database with new Supabase URLs

Future AI Upscaling Documentation

Documented Replicate API strategy for future AI-powered image enhancement
Real-ESRGAN integration plan saved for when quality enhancement is needed

Files Changed

New Files

scripts/upscale-existing-thumbnails.ts - Bulk thumbnail migration script
devnotes/FUTURE_ai-image-upscaling-replicate.md - Future AI upscaling strategy

Modified Files

None (script is standalone utility)

Migration Results

Total talks processed: 98
Successfully migrated: 98 (92 from Supabase, 3 from external URLs, 3 already WebP)
Archive location: talk-thumbnails/_archive/2026-02-05/
Storage savings: ~25-30% reduction via WebP compression

Testing Checklist

Run --test flag to validate environment
Run --dry-run to preview changes
Run --limit=3 to test small batch
Run full migration
Verify thumbnails display correctly on https://tarottalks.app
Verify external URL talks now have Supabase thumbnails