{"service":"thumbn-ai-l","description":"AI-powered thumbnail generation service","endpoints":{"POST /generate":"Generate thumbnail (requires Authorization header). Returns ULID.","POST /upload":"Upload image to R2 (requires Authorization header). Overwrites if exists.","GET /thumb/:id":"Retrieve thumbnail by ID (ULID)","DELETE /thumb/:id":"Delete thumbnail (requires Authorization header)","GET /metrics":"Service metrics"},"generateRequest":{"required":["prompt"],"optional":["thumbnailId","size","width","height"],"sizePresets":["4k-landscape","4k-portrait","fullhd-landscape","fullhd-portrait","hd-landscape","hd-portrait","square-large","square-medium","square-small","thumb-default","thumb-small"],"sizePresetDimensions":{"thumb-small":{"width":256,"height":256},"thumb-default":{"width":320,"height":320},"square-small":{"width":512,"height":512},"square-medium":{"width":768,"height":768},"square-large":{"width":1024,"height":1024},"hd-landscape":{"width":1280,"height":720},"hd-portrait":{"width":720,"height":1280},"fullhd-landscape":{"width":1920,"height":1080},"fullhd-portrait":{"width":1080,"height":1920},"4k-landscape":{"width":3840,"height":2160},"4k-portrait":{"width":2160,"height":3840}},"defaultSize":"thumb-default"},"version":"2.3.0","idFormat":"ULID (26 chars, lexicographically sortable, timestamp-based)"}