facebook-group-monitor

Monitor Facebook groups for new posts using Playwright browser automation with stealth mode and a persistent login session. Scrapes the group feed, tracks seen posts, and reports only new ones. Captures a single stitched "feed strip" screenshot (viewport scroll + Pillow stitch) for efficient LLM vision analysis — one image covers the full feed. Use when: monitoring Facebook groups, scraping FB posts, checking new group activity, Facebook automation, marketplace monitoring, book sale tracking, competitor group monitoring. Triggers: 'check Facebook group', 'scrape FB posts', 'new posts in group', 'monitor group', 'Facebook marketplace', 'group update'.