Slack

Slack is the OS of work. 2025 turns it into an Agentic OS where AI agents can read messages, summarize threads, and trigger workflow actions autonomously.

When to Use

• Corporate Comms: The standard for 99% of tech companies.
• Ops Triggers: "ChatOps" (deploy from Slack).
• Huddles: Quick voice/screen sharing.

Core Concepts

Block Kit

UI framework for building interactive messages and modals.

Workflow Builder

No-code automation ("When user joins channel, send DM").

Apps

Integrations (GitHub, Linear, Jira).

Best Practices (2025)

Do:

• Use Canvas: Store persistent info (team links) in a channel canvas.
• Use Huddles: Faster than Zoom for quick syncs.
• Use "Catch Up": The mobile swipe interface to clear unreads.

Don't:

• Don't use @channel: Unless the building is on fire.

References

• Slack API