Most marketing teams learn their CAC doubled on Tuesday by reading the Monday dashboard next week. The 90-day pipeline that catches it within hours: GA4 + Meta + Google Ads into a Sheet, nightly Gemini call with a 14-day baseline and a name-the-cause prompt, red/yellow severity to Slack. Includes the actual prompt, the n8n JSON, and a real Tuesday alert.
An n8n + Claude Haiku 4.5 agent that watches 9 subreddits, scores every post on a 3-axis rubric (intent, urgency, fit), and posts a top-5 daily digest to Slack — with the verbatim Claude prompt, the 9-sub shortlist, the cost math, and the week-2 finding that pruned it down to 4 subs for a +120% signal lift.
A Claude-powered Slack agent that handles campaign briefs, copy drafts, competitor checks, weekly recaps, and content ideas — replacing a strategist, copywriter, and analyst for the day-to-day.
Stand up an Airtable base fed by GA4, ad spend, email and CRM, a Claude prompt that answers natural-language questions about it, and a Slack slash command so any teammate can ask 'what's our blended CAC by channel this month' and get a chart back. Full hour-by-hour build, with the prompt, the schema, and the four gotchas that will eat your weekend if you skip them.
Wire a Slack slash command to an n8n workflow that fans out to Perplexity for cited research, hands the result to Claude for a 3-paragraph rewrite, and posts it back into the same channel — full JSON, prompts, and the dispatch_failed trap included.
A 6-step workflow that uses Apify to scrape 50 competitor product pages into a Google Sheet, has Claude flag any price change above 5%, and posts a Slack alert with the diff. 90-minute setup, ~$0.10 per daily run.
