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A custom agent is a reusable worker you define once and call by name. It has its own system prompt, its own tool list, optionally its own model, and optionally a pipeline of steps. Manage them at Agents in the sidebar, or with /agents.

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What you configure

The tools you can grant are web search, fetching a URL, searching your indexed sites, creating artifacts, generating PDFs, using connectors, and using integrations.

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Steps

An agent can run as a pipeline rather than a single pass. Each step has its own prompt, model and tools, and is either a generate step that produces something or a validate step that judges it. A validate step returns a pass or fail with a reason, and you choose what happens on failure: stop, continue anyway, or retry up to five times. Twelve steps maximum.

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Using one

Attach an agent to a chat from the composer and the assistant prefers it for matching work. Or let the assistant pick: it sees your saved agents and their descriptions and calls the one that fits. A good description matters more than a good name here, because the description is what the assistant reads when deciding.

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Limits