Leveraging Slack’s AgentForce APIs, we’ve built the next iteration of Slack integration for Cosine – your autonomous software engineer, designed to work alongside your team.

This feature update fully onboards Cosine inside Slack, promoting it to a true teammate: present in threads, responsive to your commands, and fully embedded in your day-to-day workflow.

Redefining Real-Time Collaboration

Developers can spend a lot of time communicating in Slack to achieve their goals. While we already supported integration with Slack, we wanted to take this collaboration even further.

Slack’s recent shift to native AI signals a broader transformation for workplace software, and this update allows development to take place directly alongside your team’s conversations.

Interacting with Cosine in Slack now feels as natural as chatting with a teammate. You can use simple chat commands and our intuitive UI elements to ask questions, assign tasks, send follow-ups, and more – all without leaving your Slack workspace.

No context-switching. Real-time collaboration.

Key Integration Features

Here’s what this feature update will look like for teams using Slack:

@Cosine in Channels and DMs

After connecting Slack with our platform, Cosine becomes available to work in any channel or DM. Just mention @Cosine with a request:

• “@Cosine, implement the new pricing logic”

• “@Cosine, investigate this error trace”

It replies in-thread, asks follow-ups if needed, and gets to work. It’s an embedded AI teammate that truly owns tasks from start to finish.

Chat-Based Working Sessions

Assign a task by starting a chat with Cosine, keeping all activity neatly contained in a dedicated Slack chat. Simply click the Cosine icon in Slack. Once tasks are assigned, you’ll see updates like:

• “Analysing the code…”

• “Writing unit tests…”

• “Opened PR for review.”

Cosine can use full chat history to parse context, so if multiple teammates talk through a bug and someone says “@Cosine fix this”, it will incorporate the entire conversation before acting.

This means engineers can have a natural back-and-forth with Cosine. If the first response needs changes, just reply in the same thread. For instance:

“@Cosine, that’s great. Please also update the unit tests.”

Cosine will pick up where it left off, using the thread’s history and its prior work as context.

This conversational loop makes code review smoother: feedback becomes actionable, and Cosine handles the follow-through. It’s built to reduce busywork and keep engineers focused on what matters.

Ready to get to work?

Our primary goal with this feature update is to provide a frictionless experience for teams working in Slack, eliminating context switching and delivering a truly seamless collaborative experience.

By integrating with Slack’s native AI architecture, Cosine becomes part of the conversation: handling tickets as they’re discussed, keeping backlogs clean, and updating teammates in real time. Developers stay in control, with full visibility into Cosine’s actions and decisions.

It’s a faster, more natural way to build together, with AI that truly works alongside you.

Get connected with Slack via the integrations tab on Cosine.

Follow our installation guide.