A Claude project is a dedicated workspace that retains context, instructions, and reference materials across every conversation within it. Instead of re-explaining your role, your goals, and your preferences at the start of every chat, you set those things up once in a project and Claude carries them forward automatically. Setting up a project takes about five minutes and can save significant time across repeated workflows.
- How to create a new project and name it effectively
- What to include in your custom instructions and why they matter
- How to upload reference files and what types of documents are useful
- How RAG enables Claude to search uploaded documents on paid plans
- What changes once your project is set up and a conversation begins
The following sections walk through each step of the project setup process and explain the decisions that make the difference between a useful project and one that underdelivers.
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To create a project, navigate to the Projects section in the left-hand sidebar of the Claude interface and click New Project. The first thing you will do is give the project a name. Names should be specific enough that they are immediately recognizable. A name like "Hiring for Data Analyst Positions" is more useful than "HR Stuff" because it tells you at a glance exactly what the project is for. Adding a brief description of the project's purpose is optional but can be helpful for clarity.
Writing Custom Instructions
Custom instructions are the most important part of a project setup. They tell Claude who you are, what this project is about, and how you want it to behave throughout every conversation in this workspace.
Good instructions cover four things: your role and organization, the specific purpose of the project, the tone and format you expect Claude to use, and any rules that should always apply. For example, instructions for a hiring project might specify that you are an HR Director looking for help reviewing resumes against job descriptions, that outputs should always begin with an executive summary followed by detailed findings, and that formal language should be used throughout.
When Claude has instructions like this in place, it starts every conversation already oriented toward your goals. You do not need to restate your role or your preferences. You can go directly to the task.
Uploading Reference Files
After writing your instructions, you can upload any documents that Claude should be able to reference within this project. In a hiring project, that might include job descriptions, company policy documents, or candidate evaluation templates. In other types of projects, it might be style guides, data files, standard operating procedures, or any other material Claude could use to give you more grounded, accurate responses.
On paid plans, Claude uses a technique called Retrieval Augmented Generation, or RAG, to search through uploaded documents efficiently. This means Claude can find and use relevant content from your uploaded files even if the total volume of documents exceeds what would fit in a single context window. The documents do not all need to be loaded into memory at once. Claude retrieves what is relevant in response to your specific questions.
What Changes Once the Project Is Ready
Once a project has instructions and reference files in place, conversations within it work differently than regular chats. Claude already has the context it needs from the moment you type your first message. There is no setup or preamble required. You can go directly to the task, whether that is reviewing a resume, drafting a document, or analyzing data, and Claude will apply the context, tone, and rules you have established from the very first response.
This persistent context is what makes projects valuable for any recurring workflow. The investment in setting up a project pays off across every conversation that follows.
- Projects provide a persistent workspace that retains instructions and reference materials across all conversations within the project.
- Project names should be specific enough to be immediately recognizable at a glance.
- Custom instructions are the most important element of a project and should cover your role, the project's purpose, preferred tone and format, and any standing rules.
- Reference files such as job descriptions, policy documents, and templates can be uploaded for Claude to draw on throughout the project.
- On paid plans, RAG allows Claude to search uploaded documents even when the total file volume exceeds a single context window.
- Once a project is set up, conversations can begin directly with the task, without any re-explanation of context or preferences.
