Build, send, and handle callbacks for Feishu interactive message cards. Cards replace plain text messages for any communication that benefits from structured layout or user actions (buttons, selects).
Critical: The content field must be a JSON string (stringified JSON), not a raw object.
| blue | Blue | Normal briefings, info | | green | Green | Success, completed | | red | Red | Alerts, failures | | orange | Orange | Warnings, degraded | | purple | Purple | Special, creative | | turquoise | Teal | Skill/tech results | | grey | Grey | Low priority, FYI |
Build and send Feishu interactive message cards (buttons, selects, status indicators). Handles card callback events from WebSocket. Use when sending morning briefings, alerts, confirmations, or any message that benefits from user interaction via buttons instead of text replies. Source: alextangson/feishu_skills.