javascript

Skip to main content

Guides Reference Samples Tools

Changelog Dev Program

Overview
Community-developed tools
Slack MCP and Skills Plugin
Sandboxes
Deno Slack SDK
Java libraries
JavaScript libraries
- Bolt for JavaScript
- Node Slack SDK
Python libraries
Slack CLI
Slack GitHub Action

JavaScript libraries
Bolt for JavaScript
Reference
type-aliases
AssistantThreadStartedMiddleware

AssistantThreadStartedMiddleware

type AssistantThreadStartedMiddleware = Middleware<AssistantThreadStartedMiddlewareArgs>;

Defined in: src/Assistant.ts:67

Middleware

AssistantThreadContextChangedMiddleware

AssistantUserMessageMiddleware

.

Tools

Slack CLI
Bolt frameworks
Slack SDKs
Block Kit Builder
Developer program
Code samples & tutorials
LLM? Read llms.txt
All tools

Learn

Learning paths
Workshops
Slack certifications
Trailhead
Resource library
All learning resources

Community

Slack community
Slack events

Resources

Docs
Blog
Slack marketplace
Developer newsletter

Manage Apps

Your apps

Status
Privacy
Terms
Cookie Preferences
Support
Changelog
Your Privacy Choices

© 2026 Slack Technologies, LLC, a Salesforce company. All rights reserved. Various trademarks held by their respective owners.