Slack Developer

Developer Tools

Platform changes for Slack apps — APIs, the Bolt SDKs and the Slack CLI.

Latest · by SalesforceWebsite

Release activity

Release activity — 15 releases across 12 days since Jun 16, 2026. Each cell is one day; darker means more releases that day. Nothing is recorded before Jun 16, 2026. Older weeks are hidden at this screen width.
MayJunJulAug
SundayNo releases on Jun 21, 2026No releases on Jun 28, 2026No releases on Jul 5, 2026No releases on Jul 12, 2026No releases on Jul 19, 2026No releases on Jul 26, 2026No releases on Aug 2, 2026No releases on Aug 9, 2026
MondayNo releases on Jun 22, 20261 release on Jun 29, 2026No releases on Jul 6, 20261 release on Jul 13, 2026No releases on Jul 20, 2026No releases on Jul 27, 2026No releases on Aug 3, 2026No releases on Aug 10, 2026
Tuesday1 release on Jun 16, 2026No releases on Jun 23, 20263 releases on Jun 30, 2026No releases on Jul 7, 20261 release on Jul 14, 20261 release on Jul 21, 2026No releases on Jul 28, 2026No releases on Aug 4, 2026No releases on Aug 11, 2026
Wednesday1 release on Jun 17, 2026No releases on Jun 24, 2026No releases on Jul 1, 2026No releases on Jul 8, 20261 release on Jul 15, 2026No releases on Jul 22, 2026No releases on Jul 29, 2026No releases on Aug 5, 2026No releases on Aug 12, 2026
Thursday2 releases on Jun 18, 2026No releases on Jun 25, 20261 release on Jul 2, 2026No releases on Jul 9, 2026No releases on Jul 16, 2026No releases on Jul 23, 20261 release on Jul 30, 2026No releases on Aug 6, 2026
FridayNo releases on Jun 19, 2026No releases on Jun 26, 2026No releases on Jul 3, 2026No releases on Jul 10, 2026No releases on Jul 17, 2026No releases on Jul 24, 20261 release on Jul 31, 2026No releases on Aug 7, 2026
SaturdayNo releases on Jun 20, 2026No releases on Jun 27, 2026No releases on Jul 4, 2026No releases on Jul 11, 2026No releases on Jul 18, 2026No releases on Jul 25, 2026No releases on Aug 1, 2026No releases on Aug 8, 2026

15 releases since Jun 16, 2026, busiest day 3

Changelog

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 current…

Added 1
  • Slack MCP and Skills Plugin for AI tools to help develop on the Slack platform
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How Announcing the Slack MCP and Skills Plugin went

Release: Slack CLI v4.6.0

Version 4.6.0 of the Slack CLI is now available!

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How Release: Slack CLI v4.6.0 went

Release: Slack CLI v4.5.0

Version 4.5.0 of the developer tools for the Slack platform has landed!

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How Release: Slack CLI v4.5.0 went

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 minimu…

Changed 2
  • Bolt for JS now uses the native Fetch API instead of axios for HTTP requests, following the Node Slack SDK's migration
  • Raised the minimum supported Node.js version
Removed 1
  • Removed the deprecated Workflow Steps from Apps feature
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How Release: Bolt for JS v5 went

Release: Multiple Node Slack SDK package updates

Our collection of Node Slack SDK packages have received new major versions.

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How Release: Multiple Node Slack SDK package updates went

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…

Changed 1
  • 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
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How Desktop notifications now pull text from blocks first went

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 t…

Added 1
  • Agent apps can now receive context about what a user is currently viewing when they send a message, including information about channels, DMs, threads, canvases, or lists
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How Agent context has landed went

Release: Slack CLI v4.4.0

Version 4.4.0 of the Slack CLI is here!

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How Release: Slack CLI v4.4.0 went

Introducing the Agent messaging experience

Agents now support a new messaging experience, set by your app manifest:

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How Introducing the Agent messaging experience went

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 tim…

Added 1
  • Added a public, read-only ts property to ChatStream and AsyncChatStream to enable calling the chat.update API method as a fallback when the server closes a stream
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How Release: Python Slack SDK v3.43.0 went

New Block Kit container block

The container block is now available for Block Kit use.

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How New Block Kit container block went

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.

Added 1
  • Introduce Slackbot MCP Client to enable supercharging Slackbot with desired tools
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How Announcing the Slackbot MCP Client went

Release: Slack CLI v4.3.0

Version 4.3.0 of the Slack CLI is here!

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How Release: Slack CLI v4.3.0 went

System notifications now delivered by "Slack" instead of Slackbot

Slack system notifications (such as channel membership changes, User Group updates, Slack Connect alerts, and retention policy notices) are now delivered from the "Slack" system user (USLACK) instead…

Changed 1
  • System notifications such as channel membership changes, User Group updates, Slack Connect alerts, and retention policy notices are now delivered from the Slack system user instead of Slackbot
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How System notifications now delivered by "Slack" instead of Slackbot went

New Block Kit data visualization block

The data visualization block is now available for Block Kit use.

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How New Block Kit data visualization block went

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