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Release: Slack CLI v4.13.0
Coding agents running slack --help now learn about the Slack MCP and Skills Plugin.
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Updated low-usage submission criteria for Slack Marketplace apps
Slack Marketplace submissions that meet the low-usage criteria will not be reviewed. A submission is considered low-usage when the app:
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Release: Slack CLI v4.12.0
Version 4.12.0 of the Slack CLI is here!
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New Block Kit layout block
The layout block is now available for Block Kit use.
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Slackbot skills API methods are here!
You can now create and manage Slackbot skills with the Web API. Programmatically create skills from markdown instructions or existing canvases, keep them up to date from CI, and roll them out across your organization.
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Release: Slack CLI v4.11.0
Version 4.11.0 of the Slack CLI is here!
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Release: Slack CLI v4.10.0
Version 4.10.0 of the developer tools for the Slack platform has landed!
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Slack Code for developers
Slack Code enables even more collaboration between humans and agents in Slack by creating dedicated channels for deeper work. Agents can now create ephemeral channels from existing conversations, providing agents and their human collaborators a shared, visible place to work.
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Release: Slack CLI v4.9.0
Version 4.9.0 of the Slack CLI is here!
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Release: Python Slack SDK v3.45.0
* We've added support for the ContainerBlock layout block (container type) and related fields.
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Release: Java Slack SDK v1.52.0
* We've added support for the TaskCardBlock layout block (task_card type) and related fields, as well as UrlSourceElement for the sources field.
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Release: Node Slack SDK updates
We've released the following Node Slack SDK-related updates:
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Release: Slack CLI v4.8.0
Version 4.8.0 of the Slack CLI is here!
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Updated installation requirement for Slack Marketplace apps
As of July 2026, we require that apps submitting to the Slack Marketplace have at least 10 installations on active workspaces, up from the temporary lower threshold. Your app needs to stay at 10 or more installed workspaces throughout the entire duration of the review.
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Release: Slack CLI v4.7.0
Version 4.7.0 of the Slack CLI has been released!
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Announcing Slack Code
An agent can answer a question in a thread, but some tasks become bigger than a single question. A coding agent may need to implement a change, share a prototype, and iterate on it. A research agent may need to gather information and work through decisions with the people involved. This kind of work needs more than a single response.
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The next wave of Agent messaging experience
We're rolling out a wave of updates to agents on Slack, along with an important heads-up about the road ahead for the Assistant messaging experience.
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Announcing the Slack MCP and Skills Plugin
We're excited to introduce the Slack MCP and Skills Plugin for AI tools, which bundles a set of skills that help you develop on the Slack platform alongside the Slack MCP Server. The plugin is currently available for Claude Code and Cursor.
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Release: Slack CLI v4.6.0
Version 4.6.0 of the Slack CLI is now available!
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Release: Slack CLI v4.5.0
Version 4.5.0 of the developer tools for the Slack platform has landed!
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Release: Bolt for JS v5
Version 5.0.0 of Bolt for JS is here! This release follows the Node Slack SDK's shift from axios to the native Fetch API, removes the deprecated Workflow Steps from Apps feature, and raises the minimum Node.js version to 20.
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Release: Multiple Node Slack SDK package updates
Our collection of Node Slack SDK packages have received new major versions.
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Desktop notifications now pull text from blocks first
Slack desktop client notifications now pull text from blocks first, falling back to the top-level text field only if no text can be extracted from blocks. Mobile notifications continue to exclusively use message.text.
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Agent context has landed
Agent apps can now receive context about what a user is currently viewing when they send a message. When a user has a channel, DM, thread, canvas, or list open and messages your app, Slack will pass that context automatically.
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Release: Python Slack SDK v3.43.0
* We've added a public, read-only ts property to ChatStream and AsyncChatStream, enabling users to call the chat.update API method as a fallback when the server closes a stream due to undocumented timeouts.
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Release: Slack CLI v4.4.0
Version 4.4.0 of the Slack CLI is here!
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Introducing the Agent messaging experience
Agents now support a new messaging experience, set by your app manifest:
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New Block Kit container block
The container block is now available for Block Kit use.
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Announcing the Slackbot MCP Client
We're excited to introduce you to the Slackbot MCP Client, which gives you the ability to superpower Slackbot with your desired tools.
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Release: Slack CLI v4.3.0
Version 4.3.0 of the Slack CLI is here!