Project Instructions

Also: project system prompt, project prompt

Project Instructions are the standing brief you give Claude for a specific project — the role it should play, the tone it should use, the constraints it should follow, the workflow steps it should apply. They're written once and automatically prepended to every conversation within that project, so you never have to re-explain the setup. Functionally, they work like a system prompt, but scoped to a workspace rather than a deployment. A good set of project instructions turns a blank chat into something purpose-built: a content editor that always follows your brand voice, a research assistant that always cites sources, a code reviewer that always checks your specific concerns first.

Related concepts