# Block Kit

> Help developers build and validate Block Kit layouts for Slack messages, modals, and Home tabs. Provides authoritative block references and validates with the blocks.validate API. Use this skill whenever the developer wants to compose Slack message layouts, build modals/forms/dialogs, design Home tab interfaces, create interactive messages with buttons or menus, modify existing Block Kit JSON, or asks about any Slack UI component (sections, actions, inputs, headers, alerts, tables, carousels). Also trigger when they mention "blocks", "Block Kit Builder", want to preview or see the rendered version of blocks, or paste JSON containing block structures like "type": "section".

## Facts
- Page: https://tashan.sh/capability/skill-slackapi-block-kit
- tashan id: skill:slackapi/block-kit
- Source: https://github.com/slackapi/slack-mcp-plugin
- Type: skill
- Category: design
- tashan score: not scored (catalogued only — too little public evidence)
- Adoption: 9.0
- Upkeep: not measured
- Freshness: not measured
- Evidence coverage: not measured
- Health: not measured
- Instruction depth: not yet graded
- Official: no

## Install

```sh
cp -r block-kit ~/.claude/skills/
```

## Security audit
Not scanned. We audit npm-published capabilities; this one has no npm package we can resolve, or has not reached the queue. This is not a clean bill of health.

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Measured 2026-08-04 by tashan (https://tashan.sh) from public evidence. Scorer s5.