Create Custom Agents

You can create custom agents in Nebula to handle specific tasks, workflows, or app integrations — built from the sidebar or just by describing what you want in chat.

How to create an agent

From the SidebarIn Chat

Click the + button next to the Agents section header in the sidebar to open the Create Agent dialog. Describe the agent you want and Nebula builds it for you.

Name your agent (optional) — give it a short name like "PR Reviewer" or "News Monitor". If you skip this, Nebula picks a name based on your description.

Describe what it should do — write what you want the agent to handle, its personality, and any tools it should use. For example: "A research assistant that summarizes articles and cites sources" or "A code reviewer that checks for bugs and suggests improvements."

Attach files (optional) — add images or reference materials the agent should know about.

Submit — Nebula creates the agent, configures its tools, generates a system prompt, and connects it to the right apps. The new agent appears in your sidebar immediately.

Describe what you need directly in any conversation:

Y

You

Create an agent that monitors my GitHub repositories for new pull requests and summarizes them.

Create agent

Creating GitHub PR Monitor agent with GitHub and web search capabilities.

Nebula

Done! Your GitHub PR Monitor agent is ready. It can watch your repos for new pull requests and generate summaries.

Nebula will create the agent, configure its tools, and connect it to the right apps — walking you through any setup steps needed.

After creating an agent

Nebula automatically configures the agent with a name, description, system prompt, model, tools, and connected accounts based on your description. You can fine-tune all of these from the agent details panel.

Configuring your agent

After creating an agent, open its details panel to fine-tune model, system prompt, goals, tools, accounts, and variables. See Configure & Manage Agents for the complete guide.

What's next?