CrossFit Weekly Poster Automation | Feishu + OpenAI Workflow

Turn CrossFit weekly programming into posters—and auto-post them to Feishu

This n8n workflow automatically converts your weekly CrossFit workout text into polished 1080×1080 CrossFit poster images, renders them via HCTI (htmlcsstoimage.com), and posts them to a Feishu (Lark) group. It also includes a Feishu webhook bot powered by OpenAI to generate, modify, or help on demand with interactive cards linking to the images.

What this workflow does

• Runs every Friday at 20:00 (Asia/Shanghai) to prepare the next week’s workout schedule.
• Parses each day’s workout text into structured sections, builds HTML poster layouts (1080×1080), and skips rest days.
• Sends the HTML to htmlcsstoimage.com (HCTI) to render poster images and collects the resulting image URLs.
• Stores poster metadata in n8n workflow static data, then posts a summary message plus one interactive Feishu card per poster with a “view full image” button.
• Exposes a Feishu webhook to receive event callbacks, handles URL verification challenges, and extracts user message text.
• Uses OpenAI Chat Completions to classify intent (generate by date, generate from raw workout text, modify an existing poster, or help), then routes the request accordingly.
• Generates/updates the workout JSON, renders a new poster via HCTI, replies in Feishu with an interactive card, and saves updated poster data for future edits.

Use cases

• CrossFit coaches want weekly posters delivered automatically to a team chat without manual design work.
• Automation engineers need an end-to-end Feishu + OpenAI poster generator that returns image links inside interactive cards.
• SaaS operators want an example of scheduled content generation with on-demand AI-driven updates.

Technical details

• Feishu (Lark) webhook bot integration (replace YOUR_FEISHU_WEBHOOK_URL in HTTP nodes).
• HCTI (htmlcsstoimage.com) rendering with configured HTTP Basic Auth.
• n8n nodes/logic include if, code, filter, switch, webhook, and `sticky note` for workflow clarity.

Perfect for n8n automation workflows that combine scheduled generation, AI intent handling, and image rendering for CrossFit weekly poster automation.