slack-block-kit

Block Kit is Slack's UI framework for creating rich, interactive messages, modals, and Home tabs. It uses a JSON-based structure with three main components:

| Messages | 50 | Notifications, bot responses, channel posts | | Modals | 100 | Forms, confirmations, multi-step workflows | | Home tabs | 100 | App dashboards, user-specific content |

| invalidblocks | Malformed JSON | Validate in Block Kit Builder | | toomanyblocks | Exceeds limit | Reduce to 50 (msg) or 100 (modal) | | invalidelement | Wrong element in block | Check element compatibility | | missingtext | Required text missing | Add text or fields to Section |

为消息、模式和主页选项卡构建 Slack Block Kit UI。在创建 Slack 通知、交互式表单、机器人响应、应用程序仪表板或任何 Slack UI 时使用。涵盖块（部分、操作、输入、标题）、元素（按钮、选择器、日期选择器）、组合对象和 slack-block-builder 库。 来源：linehaul-ai/linehaulai-claude-marketplace。