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Slack developer changelog

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2026

The next wave of Agent messaging experience
Announcing Slack Code
Announcing the Slack MCP and Skills Plugin
Release: Slack CLI v4.6.0
Release: Slack CLI v4.5.0
Release: Bolt for JS v5
Release: Multiple Node Slack SDK package updates
Desktop notifications now pull text from blocks first
Agent context has landed
Introducing the Agent messaging experience
Release: Python Slack SDK v3.43.0
Release: Slack CLI v4.4.0
New Block Kit container block
Release: Slack CLI v4.3.0
Announcing the Slackbot MCP Client
System notifications now delivered by "Slack" instead of Slackbot
New Block Kit data visualization block
Release: Java Slack SDK v1.49.0
Release: Slack CLI v4.2.0
New Block Kit data table block
Release: Slack CLI v4.1.0
Release: Python Slack SDK v3.42.0
New Slack MCP Server tools released
New Block Kit blocks and Streaming API method updates
Release: Slack CLI v4.0.0 and v4.0.1
PKCE is now generally available!
Release: Slack CLI v3.15.0
Optional scopes have landed
New supported markdown types for rich text in Block Kit
Set status method scope update
Release: Slack CLI v3.14.0
Release: Slack CLI v3.13.0
Announcing the Slack MCP server and Real-time Search API
Apps can now display thinking steps to users!
Retry delayed events feature now available
Release: Slack CLI v3.12.0
Release: Slack CLI v3.11.0

2025

Classic apps deprecation paused
Release: Slack CLI v3.10.0
Release: Slack CLI v3.9.2
Release: Slack CLI v3.9.1
Announcing the redesigned OAuth page
Introducing Work Objects
Release: Slack CLI v3.9.0
Slack API Terms of Service updates
Release: Slack CLI v3.8.1
New features designed for Slack apps sending AI responses
Release: Slack CLI v3.8.0
Release: Slack CLI v3.7.0
Introducing the Lists API
Release: Slack CLI v3.6.1
Welcome to docs.slack.dev!
Deprecation of the allow_message_deletion field
Introducing the Block Kit table block!
Release: Slack CLI v3.6.0
Release: Slack CLI v3.5.2
Classic apps deprecation timeline adjustment
Introducing Slack Web API featured workflows
Release: Slack CLI v3.5.1
Installation requirement for Slack Marketplace apps
Release: Slack CLI v3.5.0
Release: Slack CLI v3.4.0
Retiring of api.slack.com timeline adjustment
Release: Slack CLI v3.3.0
Clarifying rate limit changes for non-Marketplace apps
Rate limit changes for non-Marketplace apps
API Terms of Service updates
Release: Slack CLI v3.2.0
Release: Slack CLI v3.1.0
Release: Slack CLI v3.0.5
Classic apps deprecation timeline adjustment
The Slack CLI is now open source!
Release: Slack CLI v3.0.4
Retiring of api.slack.com
Release: Slack CLI v3.0.2
Release: Slack CLI v3.0.1
files.upload API method deprecation timeline adjustment
Slack platform API and tools docs are now in beta
Release: Slack CLI v3.0.0
Removing the Slack CLI deno command
Release: Slack CLI v2.33
A new Block Kit block is now available for use!
The Data Access API is here!
Release: Slack CLI v2.32.1

2024

Release: Slack CLI v2.32.0
Slack App Developer Policy updates
Slack platform API and tools docs are moving
Release: Slack CLI v2.31.0
Classic apps deprecation timeline adjustment
Release: Slack CLI v2.30.1
Release: Slack CLI v2.30.0
Discontinuing support for legacy custom bots and classic apps
Agents & AI Apps feature is here!
Release: Slack CLI v2.29.2
Custom workflow steps for all Slack apps are available today!
Release: Slack CLI v2.29.1
Release: Deno Slack API v2.8.0
Release: Slack CLI v2.28.0
Release: Slack CLI v2.27.1
Release: Deno Slack SDK v2.13.0 & v2.14.0
Release: Deno Slack API v2.7.0
Release: Deno Slack API v2.6.0
Release: Deno Slack API v2.5.0
Release: Slack CLI v2.26.0
Release: Deno Slack SDK v2.12.0
Release: version 2.25.0 of the Slack CLI
The files.upload method is now deprecated
Release: Slack CLI v2.24.0
Release: Deno Slack SDK v2.11.0
The September 2024 retirement of Steps from Apps for our legacy Workflow Builder approaches quickly.
Release: Slack CLI v2.23.0
Minor developer policy update
Coded event trigger improvements are now live!
Release: Slack CLI v2.22.0
Release: Deno Slack SDK v2.10.0 & Deno Slack API v2.4.0
The files.upload method is retiring, to be replaced by sequenced Web API methods
Release: Slack CLI v2.21.0
Discontinuing new creation of classic apps and legacy custom integration bots
Release: Deno Slack SDK v2.9.0
Release: Slack CLI v2.20.1 & v2.20.1
Release: Slack CLI v2.19.0
Release: version 2.7.0 of the Deno Slack SDK
Release: Slack CLI v2.18.0
Release: Slack CLI v2.17.1
Release: Slack CLI v2.17.0
File upload functionality is now available in Block Kit!
Securely render your internal images in modals and messages
Release: Slack CLI v2.16.0

2023

Release: Slack CLI v2.15.0
Release: Slack CLI v2.14.0
Release: Slack CLI v2.13.0
SCIM API token restriction by IP address
Release: Slack CLI v2.12.0
Release: Slack CLI v2.11.0
Release: Slack CLI v2.10.0
Rich text formatting for Block Kit surfaces
Release: Slack CLI v2.9.1
Slack CLI v2.8.0 and below is now deprecated
Release: Slack CLI v2.9.0
New Admin API methods are now available!
Release: Slack CLI v2.8.0
Workflow Steps from Apps step back
Release: Slack CLI v2.7.0
Slack Marketplace submissions must now have a minimum of 10 active workspace installations to be reviewed
It's later already for stars and reminders
Release: Slack CLI v2.6.0
Release: Slack CLI v2.5.1
Release: Slack CLI v2.5.0
Slack CLI v1.17.0 and below is now deprecated
Release: Slack CLI v2.4.0
Release: Slack CLI v2.3.0
The team.accessLogs method now supports cursor-based pagination
Release: Slack CLI v2.2.0
Message attachment field changes
Introducing the Slack automations platform
Beta release: Slack CLI v2.1.0
Beta release: Slack CLI v1.21.0
Beta release: Slack CLI v1.20.0
Beta release: Slack CLI v1.19.0
Beta release: Slack CLI v1.18.0

2022

2022 changelog entries

2021

2021 shortform changelog entries
Changes to admin apps requests
Rolling out a new beta app settings experience
rtm.start to stop
Changes to unfurls
Changes to admin app requests
Changes to admin apps
How we broke your Slack app
Goodbye, workspace apps

2020

2020 shortform changelog entries
App unfurls everywhere
No more tokens in querystrings for newly created apps
Events API truncate authed users
A full state on view submission and block actions
Minor developer policy update
Legacy test token creation to retire
Deprecating antecedents to the conversations API

2019

2019 shortform changelog entries
What you see is what you get and more and less
Deprecate early TLS versions
Have SCIM, will paginate
Wild West no more (for file limits, at least)
Cemented fate for file comments

2018

2018 shortform changelog entries
A bric a brac of broadcasts built with blocks
More reasons to be a conversations API convert
Developer policy updates
Workspace token rotation
Conversations APIs and scopes for workspace apps
App home events for workspace apps
File threads soon tread
OAuth flow changes for workspace token preview apps
Scoping file rights for writes in workspace token apps
Truncating really long messages
Great rate limits
Presence present and future
Don't let websocket URIs with query strings get you down
The right chat:write for workspace token apps

2017

2017 shortform changelog entries
Keeping up with the JSONs
Making RTM presence subscription only
The members array is being truncated
Locale locale locale
The one about usernames
Batch presence and presence subscriptions
Rethinking channel entrance and exit events and messages
Narrowing email access
Start using RTM connect and stop using RTM start
Minor field changes

2016

2016 shortform changelog entries
Addressing email addresses
Response metadata is on the way
Token lengthening
User ID format changes
More event timestamps in the RTM API
Authorship changing for older tokens
Changes to errors for incoming webhooks
RTM API file events payload change
Reminders API methods

2015

2015 shortform changelog entries

Tags

A

Announcement63

B

Beta6
Block Kit6
Bolt JS1
Breaking change30

C

Compilation8

D

Deno Slack API5
Deno Slack SDK6
Deprecation25

J

Java Slack SDK1

N

New Feature45
Node Slack SDK1

P

Python Slack SDK2

R

Release92

S

Slack CLI81

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