Claude Projects Tutorial: Set Up Knowledge Files and Instructions That Work

By Alex Mercer · Last reviewed 2026-10-07

This Claude Projects tutorial shows you how to set up a project whose answers actually draw on your own documents, step by step. A project gives Claude a standing knowledge base and a set of instructions, so you stop re-uploading the same style guide or price list in every chat. Anthropic's help pages explain the buttons; this guide focuses on how to prepare files and write instructions so the answers improve.

What you'll build and how long it takes

You will build one working project, for example "Client emails" for a freelancer or "Product FAQ" for a small shop, with three to six knowledge files and a short instruction block. Plan on about 30 to 60 minutes, most of it spent cleaning up documents rather than clicking. The same pattern works for any repeat task you do with AI.

Setup: accounts and tools for a Claude projects tutorial

You need a Claude account at claude.ai. According to Anthropic, Projects are available to all users, including free accounts, which are limited to five projects. Paid plans (Pro, Max, Team and Enterprise) add retrieval augmented generation (RAG), which Anthropic says automatically expands a project's knowledge capacity up to 10 times when you approach the context limit. Sharing projects with colleagues, with "Can view" or "Can edit" permissions, is a Team and Enterprise feature.

Before you start, gather the documents you reach for most often on this task: a style guide, past examples you liked, product or service details, and any rules you repeat to the AI.

Step-by-step walkthrough

Step 1: Create the project in Claude

Go to claude.ai/projects and click + New Project. Give it a name and description. Anthropic notes that Claude cannot see these details, so the name is for you; anything Claude needs to know goes into the knowledge base or instructions.

Step 2: Prepare your knowledge files

This is where most of the quality comes from. Anthropic's help center lists project-file limits of 30MB per file, with an unlimited number of files as long as the content fits within the context window. Project files are processed as extracted text, except PDFs, which can be read with their visual content. Supported formats include PDF, DOCX, CSV, TXT, HTML, RTF, EPUB and JSON.

Practical preparation habits:

One topic per file. "pricing-2026.txt" and "tone-of-voice.txt" are easier for Claude to use, and for you to update, than one 80-page dump.
Descriptive file names. You can then say "use pricing-2026.txt" in a prompt.
Strip the noise. Remove cover pages, repeated headers, old versions and tables of contents.
Convert scanned PDFs. Text extraction struggles with images of text, so export or retype the content.
Add examples. Two or three finished pieces you are happy with teach style better than adjectives.
Remove what you would not want shared. Read our guide on whether it is safe to upload files to AI chatbots before adding client or personal data. The same questions apply to Claude.

Step 3: Upload files to Claude Projects knowledge

Inside the project, use the + button in the right sidebar to upload documents or add text. Everything in the knowledge base is available to every chat in that project. Anthropic points out that context does not otherwise carry between chats, so anything you want Claude to remember across conversations belongs here.

Step 4: Write project instructions

Click Set project instructions. Good instructions are short and specific. A pattern that works:

Role and audience: "You help me write replies to customers of a small bakery. Readers are local customers, not experts."
Source rule: "Answer from the files in this project. If the files don't cover something, say so instead of guessing."
Format: "Replies under 120 words, plain language, no bullet points."
Fixed rules: "Never promise delivery dates. Prices come only from pricing-2026.txt."

Keep instructions about behavior. Put facts in files, so updating a price means replacing one file, not rewriting instructions.

Step 5: Test with real questions

Start a chat inside the project and ask five questions you already know the answers to, including one the files do not cover. Check that answers use your facts, follow the format, and admit when information is missing.

Testing and fixing common errors

Claude ignores a file. Name it in the prompt ("Using tone-of-voice.txt…"), or split a long file so the relevant section is easier to find.
Answers are generic. Add examples of good output to the knowledge base; adjectives alone ("friendly, concise") rarely change much.
Claude invents details. Strengthen the source rule in the instructions and ask it to quote the file it used.
The knowledge base feels full. Remove outdated files. On a paid plan, retrieval expands capacity, but cleaner files still give better answers.

Artifacts

When you ask for longer standalone outputs, such as a document, a table or a small web page, Claude can show them as an Artifact, a separate panel you can copy or keep editing. Anthropic lists Artifacts as available on all plans, including free. Use them for drafts you will reuse, and keep the project chat for questions.

Making it reliable day to day

Date your files. "pricing-2026-10.txt" makes it obvious when something is stale.
Review monthly. Replace changed documents rather than adding new versions alongside old ones.
One project per job. A "client emails" project and a "blog drafts" project each stay focused.
Start new chats often. Long chats get slower and drift; the project keeps the context for you.

If you are weighing Claude against ChatGPT for this kind of work, our comparison of Claude vs ChatGPT for writing covers the differences, and the AI tools by profession hub shows project ideas for specific jobs.

FAQ

What are Claude Projects?

Projects are self-contained workspaces in Claude, each with its own chat history, knowledge base and custom instructions. Files you add to a project's knowledge are available in every chat inside that project.

How many files can a Claude Project hold?

Anthropic's help center says project files can be up to 30MB each and the number of files is unlimited, as long as the total content fits within Claude's context capacity. Paid plans add retrieval (RAG), which Anthropic says can expand project knowledge capacity up to 10 times.

Is Claude Pro worth it?

Projects work on the free plan, limited to five projects. Pro, listed at $20 a month as of October 2026, adds more usage and retrieval for larger knowledge bases, so it is worth it if you hit usage limits or need many large reference files.

Conclusion

Pick the one task you repeat most with AI this week, gather the three documents you always paste in for it, and build a project around them using the steps above. Run your five test questions, fix the weakest answer by editing a file rather than the prompt, and only then build a second project.

Sources and methodology

Last reviewed 7 October 2026, from Anthropic's help center and pricing page:

What are projects?: https://support.claude.com/en/articles/9517075-what-are-projects
How can I create and manage projects?: https://support.claude.com/en/articles/9519177-how-can-i-create-and-manage-projects
Upload files to Claude: https://support.claude.com/en/articles/8241126-upload-files-to-claude
Claude pricing: https://claude.com/pricing