Announce new YouTube uploads in Discord

Every 15 minutes, check my YouTube channel for new uploads and announce each one in a Discord channel as a rich embed. This is fully deterministic — no reasoning, no drafting — so build it as a code workflow with concrete steps.

Trigger: cron on a 15 minute cadence. YouTube does not send outgoing webhooks for uploads and is not a first-class poll provider on the platform, so the cron + list pattern is the right shape here. 15 minutes is a sensible default because YouTube's Search Videos costs 100 quota units per call and the daily quota is 10,000 units.

Configuration (both user-configurable at workflow install time):

1) youtubeChannelId — the YouTube channel to monitor (a UC... string).

2) discordChannelId — the Discord channel to post announcements into.

Workflow state: persist lastSeenPublishedAt (ISO 8601 timestamp). On the very first run, if it is unset, initialize it to the current time so we do not backfill the whole channel history — we only announce videos uploaded from now onward.

Step 1 — Fetch new videos with YouTube's Search Videos operation. Pass channelId = youtubeChannelId, order = date, type = video, publishedAfter = lastSeenPublishedAt, and a small maxResults (e.g. 10). Search results use items[].id.videoId (not items[].id), so parse accordingly.

Step 2 — If there are zero new items, exit early without touching state. Otherwise sort the returned items by snippet.publishedAt ascending so we announce oldest-first.

Step 3 — For each new video, build a Discord embed with: title = the video title, description = the first 200 characters of the video description (trim trailing whitespace, append an ellipsis if truncated), url = https://www.youtube.com/watch?v=<videoId>, thumbnail.url = the highest-resolution thumbnail available on snippet.thumbnails (prefer maxres, then high, then medium, then default), and color = 0xED4245 (Discord's red).

Step 4 — Call Discord's Send a Message operation to discordChannelId with that embed. Send them in publish order.

Step 5 — Only after every message posts successfully, update lastSeenPublishedAt to the newest snippet.publishedAt from this batch. If any Discord post fails, do not advance the cursor — the next run will retry from where we left off, so we never lose a video and never double-post.