# Slack Developer changelog > Platform changes for Slack apps — APIs, the Bolt SDKs and the Slack CLI. - Vendor: Salesforce - Category: Developer Tools - Official site: https://docs.slack.dev - Tracked by: What's New (https://whatsnew.fyi/product/slack-developer) - Harvested from: Blog (https://docs.slack.dev/changelog/rss.xml) - Entries below: 15 (newest first) What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog. Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'. ## Releases ### Announcing the Slack MCP and Skills Plugin - Date: 2026-07-31 - Original notes: https://docs.slack.dev/changelog/2026/07/31/slack-skills-plugin - Permalink: https://whatsnew.fyi/product/slack-developer/releases/2026-07-31-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** — Slack MCP and Skills Plugin for AI tools to help develop on the Slack platform ### Release: Slack CLI v4.6.0 - Date: 2026-07-30 - Original notes: https://docs.slack.dev/changelog/2026/07/30/slack-cli - Permalink: https://whatsnew.fyi/product/slack-developer/releases/2026-07-30-release-slack-cli-v4.6.0 Version 4.6.0 of the Slack CLI is now available! ### Release: Slack CLI v4.5.0 - Date: 2026-07-21 - Original notes: https://docs.slack.dev/changelog/2026/07/21/slack-cli - Permalink: https://whatsnew.fyi/product/slack-developer/releases/2026-07-21-release-slack-cli-v4.5.0 Version 4.5.0 of the developer tools for the Slack platform has landed! ### Release: Bolt for JS v5 - Date: 2026-07-15 - Original notes: https://docs.slack.dev/changelog/2026/07/15/bolt-js-release - Permalink: https://whatsnew.fyi/product/slack-developer/releases/2026-07-15-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** — Bolt for JS now uses the native Fetch API instead of axios for HTTP requests, following the Node Slack SDK's migration - **removed** — Removed the deprecated Workflow Steps from Apps feature - **changed** — Raised the minimum supported Node.js version ### Release: Multiple Node Slack SDK package updates - Date: 2026-07-14 - Original notes: https://docs.slack.dev/changelog/2026/07/14/node-slack-sdk-release - Permalink: https://whatsnew.fyi/product/slack-developer/releases/2026-07-14-release-multiple-node-slack-sdk-package-updates Our collection of Node Slack SDK packages have received new major versions. ### Desktop notifications now pull text from blocks first - Date: 2026-07-13 - Original notes: https://docs.slack.dev/changelog/2026/07/13/notification-changes - Permalink: https://whatsnew.fyi/product/slack-developer/releases/2026-07-13-desktop-notifications-now-pull-text-from-blocks-f 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** — 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 ### Agent context has landed - Date: 2026-07-02 - Original notes: https://docs.slack.dev/changelog/2026/07/02/app-context - Permalink: https://whatsnew.fyi/product/slack-developer/releases/2026-07-02-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** — 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 ### Release: Slack CLI v4.4.0 - Date: 2026-06-30 - Original notes: https://docs.slack.dev/changelog/2026/06/30/slack-cli - Permalink: https://whatsnew.fyi/product/slack-developer/releases/2026-06-30-release-slack-cli-v4.4.0 Version 4.4.0 of the Slack CLI is here! ### Introducing the Agent messaging experience - Date: 2026-06-30 - Original notes: https://docs.slack.dev/changelog/2026/06/30/agent-messages-tab - Permalink: https://whatsnew.fyi/product/slack-developer/releases/2026-06-30-introducing-the-agent-messaging-experience Agents now support a new messaging experience, set by your app manifest: ### Release: Python Slack SDK v3.43.0 - Date: 2026-06-30 - Original notes: https://docs.slack.dev/changelog/2026/06/30/py-slack-sdk - Permalink: https://whatsnew.fyi/product/slack-developer/releases/2026-06-30-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** — 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 ### New Block Kit container block - Date: 2026-06-29 - Original notes: https://docs.slack.dev/changelog/2026/06/29/block-kit-container-block - Permalink: https://whatsnew.fyi/product/slack-developer/releases/2026-06-29-new-block-kit-container-block The container block is now available for Block Kit use. ### Announcing the Slackbot MCP Client - Date: 2026-06-18 - Original notes: https://docs.slack.dev/changelog/2026/06/18/slackbot-mcp-client - Permalink: https://whatsnew.fyi/product/slack-developer/releases/2026-06-18-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** — Introduce Slackbot MCP Client to enable supercharging Slackbot with desired tools ### Release: Slack CLI v4.3.0 - Date: 2026-06-18 - Original notes: https://docs.slack.dev/changelog/2026/06/18/slack-cli - Permalink: https://whatsnew.fyi/product/slack-developer/releases/2026-06-18-release-slack-cli-v4.3.0 Version 4.3.0 of the Slack CLI is here! ### System notifications now delivered by "Slack" instead of Slackbot - Date: 2026-06-17 - Original notes: https://docs.slack.dev/changelog/2026/06/17/system-notifications - Permalink: https://whatsnew.fyi/product/slack-developer/releases/2026-06-17-system-notifications-now-delivered-by-slack-inste 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** — 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 ### New Block Kit data visualization block - Date: 2026-06-16 - Original notes: https://docs.slack.dev/changelog/2026/06/16/block-kit-data-visualization-block - Permalink: https://whatsnew.fyi/product/slack-developer/releases/2026-06-16-new-block-kit-data-visualization-block The data visualization block is now available for Block Kit use.