{"$schema":"https://top-agent-skills.com/schemas/skill.v1.json","name":"block-kit","slug":"slack-block-kit","canonical":"https://top-agent-skills.com/skill/slack-block-kit","description":"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 whenever the developer wants to compose Slack message layouts, build modals, forms or dialogs, design Home tab interfaces, create interactive messages with buttons or menus, modify existing Block Kit JSON, or asks about any Slack UI component. Also trigger on \"blocks\", \"Block Kit Builder\", or pasted JSON containing block structures.","tagline":"Slack's own Block Kit skill — and the rare vendor skill that needs no token, because it validates against Slack's public API.","bestFor":"Composing Slack messages, modals and Home tabs where hand-written Block Kit JSON is the thing that keeps breaking — it validates output against Slack rather than guessing.","notIdealFor":"Actually sending the message. It generates and validates layouts; delivery is the sibling slack-api skill, which does need a token.","publisher":{"name":"Slack Technologies","url":"https://github.com/slackapi","tier":"verified-org"},"license":"MIT","isOpenSource":true,"surfaces":["claude-code"],"compatibility":["claude-code"],"capabilityLevel":"read-write","setup":{"time":"2 min","complexity":"Low"},"install":[{"agent":"claude-code","command":"/plugin marketplace add slackapi/slack-skills-plugin","manual":null,"followUp":"No token needed — blocks.validate is an unauthenticated public method. The same plugin adds slack-api, slack-cli, slack-docs and messaging skills."}],"taxonomy":{"primaryCategories":["email-messaging","apis-integrations"],"verticalCategories":["engineering","product"],"tags":["Slack","Block Kit","Modals"],"filters":["verified-org","open-source","plugin-install","read-write","bundles-scripts","recently-updated","agent-friendly","works-with-claude-code"]},"links":{"github":"https://github.com/slackapi/slack-skills-plugin/tree/main/skills/block-kit","docs":"https://github.com/slackapi/slack-skills-plugin/blob/main/skills/block-kit/SKILL.md","website":null},"_meta":{"score":{"value":53,"rubric":"1.0","inputs":{"installCount":0,"provenance":12.8,"githubStars":5.7,"recency":10,"compatibility":2,"documentation":10,"installErgonomics":7,"license":5,"verification":0.5}},"stats":{"installCount":null,"githubStars":100,"lastUpdated":"2026-08-12","verifiedAt":null}}}